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Harry Reid
Romney On His Mormonism
October 19, 2007
Well, it wasn't exactly JFK at the Greater Houston Ministerial Association, but Mitt Romney did broach the religion question at the Family Research Council's "Washington Briefing" just now. Here's what he said (and I'm paraphrasing slightly since it was a few minutes before I could jot it down): I understand that a few people have heard I'm Mormon. Some people have wondered whether they could vote for a Mormon. But that's probably just because of Harry Reid.
Those Evil-natured Lobbyist Robots, Programmed To Destroy Us
October 09, 2007
Obama is angry today at the Senate for listening to the money and dropping their assault on private equity firms. The sentiment is dead on -- except he is a member of that Senate. I understand campaigning takes up all a candidate's time, but if he worried so much about reform on this getting accomplished, he could have pushed Harry Reid a little. Word from your party's presidential candidates that they really need a chance to register a crucial Senate vote has some influence.
Reading Reid's Tea Leaves
September 19, 2007
Is anyone else having trouble understanding what is going on inside Harry Reid's head? A couple of weeks ago, he vowed to take a new tack and work more closely with Republicans on compromise Iraq legislation this fall, but today there's this: After weeks of suggesting Democrats would temper their approach to Iraq legislation in a bid to attract more Republicans, Senate Majority Leader Harry Reid declared abruptly Tuesday that he had no plans to do so. "There (are) no goals.
The Gop's Glum View
August 01, 2007
Along with several other reporters today I attended a background lunch (held at 101 Constitution Avenue, naturally) with a prominent Republican senator. It doesn't seem like much fun to be in his shoes right now. He could barely mount a case for a Republican comeback in the short term, and even fretted about the possibility of Democratic numbers in the Senate growing to the point where Harry Reid can easily break filibusters. Particularly telling was his response when someone asked which issues he thought the GOP could ride back into power.
Go On And Cry Me A River
July 23, 2007
I'm not a big Bob Novak reader over here, but this morning's incredibly incoherent and intelligence-insulting offering deserves a mention: Billed with the sexy title "Reid's Anti-Reform Maneuvers," Novak's column consists of a harangue against a single earmark offered by Senator Ben Nelson -- debate over it was scuttled to make space for the all-night Iraq debate, a switchoff that Novak concedes was "mere coincidence," not the result of Reid's disclosure-suppressing machinations -- and vague harrumphing about the government's good old days of the sort you usually get sitting at the feet of you
You'll Stay Up 'til This Dump Shines!
July 17, 2007
The cots were just rolled into the Capitol to dramatize Harry Reid's forcing the Republicans to do an all-night filibuster on the Levin-Reed amendment.
More On The Politico
June 15, 2007
The Politico story I slammed yesterday--about Harry Reid criticizing Generals Pace and Petraeus in a conference call with liberal bloggers--turns out to be accurate, at least as it relates to Pace. Blogger Bob Geiger, who was on the call, has confirmed that Reid described Pace as "incompetent." The outstanding question, as far as I can tell, is what, if anything, Reid said about Petraeus during the call. The initial story asserted that the majority leader made "similar disparaging remarks" about Petraeus but gave no further sense of what those comments might have been.
Knowledge Gap
April 30, 2007
Maybe it was a slip of the tongue. But, when Nancy Pelosi confessed last year that she felt "sad" about President Bush's claims that Al Qaeda operates in Iraq, she seemed to be disputing what every American soldier in Iraq, every Al Qaeda operative, and anyone who reads a newspaper already knew to be true. (When I questioned him about Pelosi's assertion, a U.S. officer in Ramadi responded, incredulously, that Al Qaeda had just held a parade in his sector.) Perhaps the House speaker was alluding to the discredited claim that Al Qaeda operated in Iraq before the war. Perhaps.
Riddle Me This
April 26, 2007
"Here's a Washington political riddle where you fill in the blanks: As Alberto Gonzales is to the Republicans, Blank Blank is to the Democrats.... If you answered 'Harry Reid,' give yourself an A." So begins David Broder's latest effort to force his shallow, utterly obsolete, both-parties-are-equally-to-blame-for-everything frame onto the news of the day. Is he suggesting that Reid is the beneficiary of rank cronyism? No. That he lies at the center of a fast-metastasizing scandal involving the politicization of law enforcement? Also no.
Mincing Words
April 23, 2007
As you probably know, Harry Reid said the other day that the war "is lost." Pressed about that quote on CNN this evening, Reid's main defense amounted to repeating General David Petraeus's argument that the war "can't be won militarily." But that's a very different point. Petraeus was arguing for the necessity of a political settlement--one he still apparently thinks possible. (Although I'll grant that Petraeus sounded alarmingly discouraged in this article.) I don't think it's at all ridiculous to call the war a lost cause.


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Fla. deputy fired for slapping inmate in handcuffs
Posted: 02/02/2009 - A Palm Beach County Sheriff's deputy has been fired for slapping a teenage inmate in handcuffs and then lying about it to investigators.
Posted: 02/02/2009 - A Palm Beach County Sheriff's deputy has been fired for slapping a teenage inmate in handcuffs and then lying about it to investigators.
Posted: 02/02/2009 - Two 16-year-old boys face arson charges for 15 fires set across St. Petersburg.
Posted: 02/02/2009 - At about 6:15 this morning, February 2, 2009, a 911 call was placed to the Bay County Sheriff's Office in reference to a shooting in Fountain.
Posted: 02/02/2009 - On Friday, January 30th, officers with the Washington County Sheriff's Office received information that a wanted person was located at a residence on Hancock Court in Sunny Hills
Posted: 02/02/2009 - Authorities say at least 80 roosters had to be euthanized after a raid on a South Florida cockfighting ring.
Posted: 02/01/2009 - Residents in one southwest Florida county will get a phone call when a sex offender moves into the neighborhood.
Updated: 02/01/2009 - A South Carolina man who faked his own death 20 years ago while visiting Florida says he never looked back after he plunged into the surf.
Posted: 02/01/2009 - A biotech research facility has opened its Florida headquarters.
Updated: 01/31/2009 - The Florida Supreme Court has knocked a proposal for a property tax cap from the 2010 ballot.
Updated: 01/31/2009 - A central Florida high school principal says he doesn't have the money to pay substitute teachers so students are forced to sit in the gym for nearly an hour when their teachers are absent.
Updated: 01/31/2009 - Miami Police are trying to determine if foul play was involved in the death of a man whose body was found floating in the Miami River.
Posted: 01/30/2009 - A Miami man is charged with three counts of DUI manslaughter for a horrific car crash that left three children dead.
Posted: 01/30/2009 - Embattled Florida House Speaker Ray Sansom is stepping down from his post.
Posted: 01/30/2009 - A central Florida mother accused of killing her toddler is back in an Orlando courtroom for a hearing in her murder case.
Posted: 01/30/2009 - A state panel is set to interview eight applicants for a fourth Florida Supreme Court vacancy in less than a year.
Updated: 01/30/2009 - Seven winners of the "Fantasy 5" game will collect $30,175.26 each, the Florida Lottery said Friday.
Posted: 01/30/2009 - Try pulling someone's hair in high school or at the mall, and you could have an all-out brawl. But at Sunday's Super Bowl, as in other NFL games, it's perfectly within the rules.
Posted: 01/29/2009 - A death row inmate who killed a Lake County sheriff's deputy has lost an appeal to the Florida Supreme Court.
Posted: 01/29/2009 - State Farm Florida wants out of Florida, but first Insurance Commissioner Kevin McCarty wants a detailed review of the company's property insurance customers.
Posted: 01/29/2009 - Authorities say a North Carolina man who faked his own death 20 years ago while visiting Daytona Beachtold police he was trying to hide from a large South Carolina drug ring.
Posted: 01/29/2009 - Another central Florida teenager involved in the notorious videotaped beating of a classmate has pleaded guilty, and she may go to jail.
Posted: 01/29/2009 - A Medicaid privatization program former Gov. Jeb Bush touted as a national model for improving patient care while decreasing government costs is floundering as
Posted: 01/29/2009 - A sharply divided Florida Supreme Court says law enforcement agencies can be sued over "safety checks" that go bad.
Posted: 01/29/2009 - The Florida Supreme Court says two proposals designed to prevent political favoritism in redistricting can go on the 2010 ballot if sponsors collect enough signatures.
Posted: 01/29/2009 - Emergency officials say a military skydiver was taken to a Tampa hospital after landing in a lake near MacDill Air Force Base.

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Amazon.com Review
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Copyright © 2004 Phillips & Nelson Media, Inc. --This text refers to the Hardcover edition.
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1. The philanderer Martin Luther King is the nation's greatest religious leader.
2. You have to be pro-pervert to be pro-family.
3. Read more
We chose this for our Sunday School text. Jim Wallis is one of the rare thoughtful writers in the thick of the religious political wars of this century.Published 4 months ago by Mac Clark
Although Jim Wallis is a pastor, technically this is not an actual theology book. However, over and over again Wallis underscores the central biblical themes of justice, equality... Read morePublished 4 months ago by Leah Chang
The title of this book infers the content would be independent, unbiased, and non-partisan. This wasn't the case at all. Read morePublished 5 months ago by Danny
In an age when folks regularly confuse religion and politics, mixing them wrongly and for the wrong purposes, Jim Wallis guides the role of each for proper life in America under... Read morePublished 13 months ago by David F. Daniels
Jim Wallis works very hard to take a balanced view of all political sides and has some challenging words for all of us. Read morePublished 20 months ago by elle.victor
because it is an older copyright-----i enjoyed the 2013 book by wallis more----ON GOD'S SIDE----god's politics is a good review of the bush -cheney-years----and the dishonesty of... Read morePublished 20 months ago by Myron Zerger
Straight talk on typically untouchable subjects. Objective and helpful commentary which blows apart the "red=good, blue=bad" stereotypical silliness that defines most of... Read morePublished 21 months ago by Hubert van der Harst


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Colombian Aroid dentification
Can anyone help me identify this plant which I found growing in "cloud forest at 6000'?
If you were in an area of high endemism, and the area has not been explored, it could be a new species of anthurium. Reminds me of Red Beauty, but the coloration is different. Larger photos will help in IDing it. You could also post this at the Aroid ID center where botanists have IDed plants there. Go to aroid.org
I've had the shingles, and they are not nice!
But, gorgeous plant photo and plant! There is another aroid forum site: http://blueboard.com/aroid, that you might try as well. If it is not an anthurium, you'll find out for sure because there are a lot of experienced people who grow anthuriums and philos on that site.
Beware - if it is a new plant - you will get them all excited and hysterical!
I don't know the identification either, but I enjoy your photos. You are lucky to have such plants growing "in your backyard". I have been close to the Columbian border, in northwest Ecuador, and the area there is very beautiful and similar to your photo. Apparently many of the aroids (and other plants) in that region have not yet been scientifically described!! There is a lot waiting to be "discovered".
susanlynne- Great sense of humor!!


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The Big Green Egg headquarters has moved - come visit our new location and check out the museum! 3786 DeKalb Technology Parkway, Atlanta, GA 30340
Caledon, ON
I crap bigger than Little Stevens.Little Steven said:
Do not make me come down there Irish!
Caledon, ON
That's the funniest thing I have ever read. Bravo.Little Steven said:
You're just the kinda guy that wouldn't give a guy the courtesy of a reach around
Caledon, ON
LBGE,SBGE, and a mini makes three......Sweet home Alabama........ Stay thirsty my friends .
Caledon, ON


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hey, I pick da Undertaker. No i'm English, are you?
I'm interested in knowing who is your pick for the ladder match on Sunday. I think Bryan will be holding the gold and doing the yes chant at the end of the match.
And hi fellow United fan:D
Nothing much. Just had an accident while riding a bike. Nothing major. Was just a minor fracture.
How are u doing? Ready for Wrestlemania!!!
Very Awesome Name :)
Manchester United? SMH AT YOU! ;)
Many people on this site are mental deficients. I'm good though. Other than the crap here, how are you?
Hey Julia, I like your name XDXD
Big Show's gonna show up to your house and deliver his massively overpowered Knock Out Punch if you keep this up, Big Show needs a record of his own Julia, HE NEEDS A RECORD OF HIS OWN *Sobs* XD
Thats why Bray Wyatt is better than McDonalds.
But still McDonalds>>>>>>> Cena.


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Classical Blast is a unique band dedicated to bringing the classical arts to mainstream rock & pop music. We're classically trained musicians who love to rock. We believe in the power of the arts — to inspire, to educate, to uplift, to effect change, even to heal. We often use our time to teach or to perform at hospitals to help positively change the energy for those dealing with illness. We also believe music has no boundaries. We apply these concepts to our live shows by performing whatever we enjoy playing. Who says we have to stick with one genre? Our influences have no boundaries. Classical Blast's style, technique and tools breathe new life into rock music as well as the classics. From Bach to classic rock to metal to pop, we hope you'll find our approach to music a refreshing change. It's the past, present & future all brought together in perfect harmony! An evening with Classical Blast is a total blast for any age! Join us for the ride...
America's Band!
Classical Blast was invited to perform the National Anthem at Wrigley Field last year, and looks like they'll be back again this year. In the movie "Back to the Future II" the Cubs win the World Series in 2015. Will this be the year? Well, just in case we've produced a new single dedicated to our All-American Cubbies, featuring our versions of the Star Spangled Banner and also America the Beautiful. Now available for download on I-Tunes and Amazon!
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Classified features these songs:
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2. Beautiful Day
3. Dust In the Wind
4. WonderWall
5. Babe, I'm Gonna Leave You/
While My Guitar Gently Weeps
6. Beat It
7. Nothing Else Matters
8. Sweet Child O' Mine
9. Comfortably Numb
10. Breakfast in America/Stairway to Heaven
Order your AUTOGRAPHED, specially packaged copy of our CD "Classified" and get a bonus mp3 track of Hotel California. We'll send you a link to download the track once we receive your order.
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Get a taste of "Classified" here (sample tracks):
White Room
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How do you over winter Mandevilla
I had two mandevillas on trelis we had a surprise frost and all the leaves and flowers wilted. I was told to cut them back dig them up pot them and put them in my garage. Now what?
I don't want them to die they were so beautiful and full before.
Thank you,
The ideal way, from the plant's perspective, to overwinter these if to have them in a tropical house with all the time summer. Most of us do it with far less than ideal conditions, but a testament to this vine's will to live is that they come through anyways.
Whatever you do, prepare for a naked plant with dead vines, esp. after a frost. These are true tropicals, meaning they don't much care for anything under 60°F and dry air. This means that the leaves will fall. All of them by springtime. You will be tending a pot of mangey looking life until March. But, if you were to look underground at the roots, you would see large storage organs that will wait for the next warm, moist time to regrow. So don't let it get bone dry, because the roots are still alive. If you keep it cool, don't let it freeze (again in this case). If your garage gets close to freezing, it might be better to stick them in the house. Depending on how much foliage is left on top, you can either keep them near a window (if the plant has say, 25% or more of its leaves) and watch them fall off. This means that you will keep the soil somewhat moist until they are all down, then only water to prevent the soil from drying out fully. This scenario makes sure that the plant is not forgotten to dry out completely in a cold dark garage.
If the vine looks dead, with just about every leaf down, then it can be put in a cool dark place to lick its wounds until late Feb. Make sure the soil is sort of dry (but not bone dry), and try to keep ventilation on it so that fungi don't take up residence in the roots. Just good air circulation is fine, no need to run a fan on it. Keep an eye on the bottom where the frost is less likely to have killed everything, and when you see green pointy things in late Feb, place the plant in the strongest light you have. (Don't take the plant out of a cellar with 1/2inch growth and put it in full sun, this fries the new growth.) Get it used to strong sun.
In any case, I would wait until you see what you have left before pruning. These bleed a white sap that provokes a reaction in some people, and you may want to keep some of the vines for scaffolding for next year's plant. Throughout the winter you will notice some parts that wither and shrink and become brittle. This is dead and can be removed as you see fit to do it. Good luck. If you want to try some from seed, send an e-mail. I'll have ripe seed after the new year. The colors are varied though, so if you have your heart set on pink, do not grow it from seed. The pretty pink ones are hybrids and the resulting plants have flowers from almost pure white to dark pink, with a few that have pink/white blossoms.
I overwintered my Mandevilla and it did fine in the downstairs garage(we put light on our plants w. a timer that we overwinter). When the M. was brought out for the summer, we had a bad hail storm (first one I have seen in this area). The M leaves were terribly bruised and all were eventually replaced w. new leaves. However, my M only put out leaves and blooms at the top of the plant i.g. at new growth. I asked my local gardening store if I sh. cut it back. Yes was the reply.
Was this the right thing to do? e.g. Do mandevillas bloom on only new growth. I had many flowers all on top of the plant and onto my roof!


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Congratulations to Professor Qingyan Chen for receiving 'Building Simulation' award
September 18, 2013
Professor Qingyan Chen received the Award for Distinguished Service to Building Simulation from the International Building Performance Simulation Association (IBPSA). This award recognizes an individual who has a distinguished record of contributions to the field of building performance simulation, over a long period. IBPSA selects only one individual every two years for the prestigious award. The award was presented to Professor Chen on August 27, 2013 during IBPSA's 13th Building Simulation conference in Chambery, France.Read Full Story
New processing technology converts packing peanuts to battery components
March 23, 2015
Researchers have shown how to convert waste packing peanuts into high-performance carbon electrodes for rechargeable lithium-ion batteries that outperform conventional graphite electrodes, representing an environmentally friendly approach to reuse the waste.Read Full Story


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Upcoming this Season
Check out our new and upcoming courses this season. These courses have been carefully selected to renew, restore and rebalance.
"The Sanctuary was the perfect location for our Staff Development Day and staff got so much from it. We really needed some time out as a team to reconnect and destress, and the place itself was part of the experience. The day was designed specially with our business in mind and all our needs were catered for. It is such a beautiful location and we particularly enjoyed having our lunch in the garden."
- Staff Development Day
"The eight week MBSR course was just what I needed. I had an interest in meditation and mindfulness but didn't know where to start. It was a lovely safe way to learn about the idea of mindfulness and how to handle stress better. Even though I found the meditations difficult at the beginning, I am much more comfortable with it now. I learnt so much from the group and it was great that we were all in it together. I wouldn't hesitate to recommend it to anybody."
- 8-Week MBSR
"Such a wonderful way to spend a Saturday morning. The Mindful Half Day is just so peaceful and really quietens the mind. It is the perfect way to develop my daily practice. Fionnuala was just really warm and welcoming. Have already booked the next one"
- Mindful Half Day


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Jennifer Leather scam
Posted by
We purchased leather couch and chair from one of the Manhattan stores in 2007 and added the protection plan to it as well. All-in for about $1700. It is now about 2.5 years later, and all of our couch pillows are peeling, the small tears are spreading real quick and getting larger. The couch now looks like a big piece of junk! The chair hold for now bc it gets very little use. We have no kids, and no pets getting on the furniture, so this problem is just from a usual use – you sit on the couch for about few hours a night. The leather is actually not leather as I found out to my dismay! The customer service told me that we did purchase leather product, after a little discussion on the type of leather, they confirmed it is actually man-made 'bonded' leather that does contain certain % of real leather. They were very surprised I was upset about this, as I thought I purchased real leather product that would lasted a long time. The protection plan of course doesn't cover peeling or regular wear, as they call it. And the store itself only provides warranty for 1 year - really! They should really change their name to Jennifer Pleather! I am now stuck with this poor quality product, I am out of money and can start shopping for a new sofa. PLEASE DON'T SHOP THERE, YOU WILL BE VERY DISAPOINTED, IT'S A RIP OFF!!!
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Everyone - Save Yourself Time, Money and Aggravation: Don't Buy Anything from Jennifer Convertibles
Posted by
WEST ROXBURY, MASSACHUSETTS -- I bought a black leather Lorenzo sofa. The moment it was delivered the leather sagged in a lot of areas so I requested an in home inspection by a Jennifer Customer Service Rep Teresa Dilone. I finally received a letter saying this was normal and "up to manufacturer standards, not requiring repair or replacement." 3 months later a spring was poking through the furniture which they did send a repair tech to fix - taking 4 months from time of complaint about that to the time it was fixed. Each time I called or sent emails to Jennifer after that, I'd get an email response "Thank you for contacting Jennifer Convertibles, someone will get back to you"(and they never did) or verbal responses that there is nothing that can be done: the leather sofa line (Lorenzo)is no longer carried and it 'really isn't a high quality line, sorry there is nothing we can do to help you.' This furniture, being mostly to 'look at' and not used everyday is garbage. The places where I complained about the leather sagging, started to peel off. After many calls to the store where I bought it (West Roxbury Massachusetts), emailed complaints to the Corporate offices in Woodbury NY, and then filing a complaint with the Massachusetts Attorney General's Office - the bottom line is Jennifer management told the AGs office that this furniture's life expectancy was at most 4 to 5 five years, it's really not meant to last, and there was nothing they could or would do. The manager of the West Roxbury MA store Mark Heller actually told me, "This is inexpensive furniture, this is Jennifer's market segment. The furniture is not meant to last a lifetime - 4 to 5 years tops. It's for people who replace their furniture every couple of years." It's a line of crap. I explained that I've had problems, documented problems with the furniture since day one and all he kept saying was 'Sorry, there's nothing we can or will do." The leather on this furniture is definitely defective - no doubt about it. I've since told this story to folks at other respectable furniture stores (and friends who have sold quality furniture) and without reservation they state that all of Jennifer's products are garbage. So, save yourself your hard earned money, your valuable time, and the aggravation and don't step foot into a Jennifer store. Their products are garbage as are their employees. If you are stuck with their trash, the best thing to do is file a complaint with your local Better Business Bureau, your Attorney General's Office, and post your horror stories on the web for all to see. Call your local news stations and explain your plight to them; perhaps they will do an expose on Jennifer Convertibles. Why should we all suffer for their selling us garbage and not stand up for ourselves?? Jennifer needs to be out of business. Period.
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Sofa Damages
Posted by
NY -- I purchased a 3-piece leather sofa set from Jennifer Convertibles (5) years ago. It is the same model as the previous illustrations noted by other individuals in this comment section. I also purchased the protection plan at the time of initial purchase.
I was instructed to contact the service dept. which handles the maintenance of my furniture bet. 6 months - 1 year after the initial purchase to re-condition the leather. I called for service a total of (4) times because that they cancelled (at the last minute or never showed up to my home) scheduled dates on the fist 3 occasions.
My furniture is peeling so so badly on all (3) pieces and one of the seat cushion seams unraveled. I recently called the store location where I purchased the furniture and they referred me to customer service. So far, no response from them on several attempts. Furniture is terrible. NEVER again will I ever spend my $$$ there.
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Do Not buy Leather sofas from Jennifer Convertibles!
Posted by
Utter trash spent 2k on a 4 piece set a few years later same as other peoples complaint, they are all peeling and are a complete eyesore, worst company will never do business with them and will tell all my friends to saty away, spread the word before you have the same experience!
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Don't Waste Your Money
Posted by
WHAT A HUGE RIP OFF. I purchased a leather sofa, love seat, and chair plus the protection plan from these people! It's 3 and 1/2 years old and looks like it should be tossed on the side of a road. First small tears appeared which quickly grew larger. The "so-called" leather started cracking and peeling. I wonder if this is even actual leather. I had the protection plan, for an extra $250, so I thought no problem right? Wrong! It took them a few weeks to finally come out. One man looked at the furniture for no more than two minutes and left. No conversation and he did not answer any questions. I received a letter in the mail a few weeks later saying that my furniture was not covered because each problem had to be reported within seven days of occurrence. I would have been on the phone daily for weeks and weeks. To make a long story short, nothing was repaired or replaced. I have this furniture covered with duct tape to stop the rips and peels from worsening.
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Sofa Bed Damaged
Posted by
We purchased a queen sofa bed from Jennifer Convertibles at the Eatontown NJ location less than a year ago. It was used on two occasions and as we have no children living at home, it does not get much use. I was vacuuming last week and noticed under the sofa the complete bedding was on the floor. I called the 800371-6111 and was told they couldn't fix it. They only repaired spills or stains on the leather.
I am appalled as our son is in the Marines and coming home from Japan in the summer and expecting to stay with us for two weeks... HAVEN'T SEEN THEM IN 4 YEARS.
We paid 2011.78 for the set are senior citizens and can't afford a new one. Help please!
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Leather Sofa
Posted by
One 12/17/05 I purchase a Wrigley Queen Sleeper. It was delivered on 2/23/06. The leather started to show signs of wear sometime in 2006 so I requested an in home inspection by a technician. On 8/14/06 I received a letter saying wear and tear was not covered. However since then the brown leather is peeling off the cushions. I feel that the leather on this sofa is defective. My husband and I both work and we have no children living in our home. So we don't sit on it all that much. The price was $799 which isn't cheap.
I contacted Jennifer Convertibles, 2 days ago through the Internet and am still waiting for a response about this defective product.
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A power tong system for engaging or disengaging threaded pipe sections has an annular rotary member that is supported against lateral thrust and include a hinged portion that is pivotable to permit side access to a pipe. The rotary member is rotated about its central axis by a peripheral drive chain engaging the rotary member through a relatively small wrap angle. The free end of the hinged portion and the opposing end of the principal body of the rotary interlock and become more secure in self-centering fashion under the spreading forces that are exerted during operation. Structurally rigid head plates on opposite sides of the rotary member are slidable relative to the housing, and incorporate spaced apart radial bearing slots that guide oppositely disposed heads that engage the pipe with hardened die elements. Twisting moments on the heads are absorbed in the head plates, such that the heads are subjected only to uniform and symmetrical forces. Balanced radial and rotational forces are applied to the pipe in both the engage and disengage directions without a need for frictional restraint or braking force on any member. The system operates smoothly and quietly, can generate extremely high torques and has very long die life.
1. A power tong system for gripping and rotating a cylindrical element comprising:
a pair of spaced apart upper and lower head plates including oppositely facing guide slots disposed along a selected axis, the guide slots defining spaced apart and parallel side bearing surfaces;
a rotary member disposed between the head plates and movable relative thereto, the rotary member including an internal cam surface and outer teeth;
a pair of opposed heads between the head plates, each slidable in a facing pair of the guide slots along the selected axis, and each including a pair of spaced apart die means for engaging an interior cylindrical element and cam follower means for engaging the internal cam surfaces of the rotary member; and
drive means engaging the outer teeth of the rotary member and rotating the rotary member, whereby the cam follower means shifts the position of the heads radially relative to engage each pair of die means symmetrically relative to the cylindrical element and lock the head plates to the rotary member, the side bearing surfaces in the guide slots resisting torsional moments acting on the heads under load.
2. The invention as set forth in claim 1 above, wherein the internal cam surface includes a pair of oppositely disposed concave cam nodes, each having adjacent cam ramp surfaces, such that the die means are spaced apart from the cylindrical element when the cam followers are aligned with the cam nodes.
3. A power tong system for gripping and rotating a cylindrical element comprising:
a pair of spaced apart upper and lower head plates including oppositely facing guide slots disposed along a selected axis, the guide slots defining spaced apart and parallel side bearing surfaces;
a rotary member disposed between the head plates and movable relative thereto, the rotary member including an internal cam surface and outer teeth;
a pair of opposed heads between the head plates, each engageable and slidable in a facing pair of the guide slots along the selected axis, and each including die means on one side closest to the opposing head for engaging an interior cylindrical element and cam follower means on the other side for engaging the internal cam surface of the rotary member; and
drive means engaging the outer teeth of the rotary member and rotating the rotary member, whereby the cam follower means engages the cam surface and shifts the position of the heads radially relative to the cylindrical element to engage the die means symmetrically relative to the cylindrical element and lock the head plates to the rotary member, the side bearing surfaces in the guide slots resisting torsional moments acting on the heads under load.
4. The invention as set forth in claim 3 above, wherein the internal cam surface includes a pair of oppositely disposed concave cam nodes, each having adjacent cam ramp surfaces, such that the die means are spaced apart from the cylindrical element when the cam followers are aligned with the cam nodes and engageable against the cylindrical element when the cam follower means ride on the ramp surfaces between the limits thereof.
This is a continuation of application Ser. No. 919,365 filed June 26, 1978, now U.S. Pat. No. 4,215,602, issued Aug. 5, 1980.
Present day power tongs that are employed for coupling and decoupling threaded pipe sections are typically subject to one or more of a number of practical problems. Some examples are found in systems for the engagement and disengagement of sections of a casing or pipe string that is to be lowered into or removed from a well bore. Extremely high torques may have to be applied, due to combinations of factors such as the presence of corrosion, the existence of distortion, and pipe size and weight. High shock forces arise, both in the "make" direction of rotation when a shoulder is suddenly encountered, and in the "break" direction at initial disengagement. Moreover, the forces and pressures involved are at such levels that operation is seldom smooth and uniform. For example, in excess of 50,000 foot-pounds of torque may be exerted, and the power tongs may be required to withstand a spreading force of in excess of 200,000 pounds, while relatively small die elements engage the pipe with extremely high force loadings. Consequently it is common for slippage to occur, for the pipe surfaces to become galled, and sometimes for the pipe to be broken.
There is a profusion of patent art in this field, all of which evidences the extent and variety of the problems that are encountered and the numerous attempts that have been made to overcome such problems. By way of reference, the following patents are illustrative of the state of the art: U.S. Pat. Nos. 3,875,826, Dreyfuss et al, Apr. 8, 1975; 2,950,630, J. C. Mason, Aug. 30, 1960; 2,879,680, A. W. Beeman et al, Mar. 31, 1959; 3,147,652, George, Sept. 8, 1964; 3,140,624, George, July 14, 1964; 3,023,651, Wallace, Mar. 6, 1962; 2,846,909, Mason, Aug. 12, 1958; 3,064,413, Mason, Apr. 23, 1963; 2,933,961, Adams, Apr. 26, 1960; 3,691,875, Geczy et al, Sept. 19, 1972; 3,704,639, Foss, Dec. 5, 1972; 2,550,045, De Hetre, Apr. 24, 1951; 3,793,913, Wilms, Feb. 26, 1974; 3,996,320, Brown, Dec. 4, 1973; 3,706,243, Wilms, Dec. 19, 1972; 3,180,186, Catlind, Apr. 27, 1965; 3,722,603, Brown, Mar. 27, 1973; 3,635,105, Dickmann et al, Jan. 18, 1972; 3,371,562, Kelley, Mar. 5, 1968; 3,507,174, Dickmann, Apr. 21, 1970.
In order to react against the spreading forces that are created, some systems of the prior art utilize a full rotary construction. That is, the principal operative element is a closed ring rotary which is strong enough to withstand the spreading forces but which because of its closed ring design can only be installed or removed over the end of a pipe. Other workers in the art, such as evidenced by Dreyfuss et al U.S. Pat. No. 3,875,826, have devised specialized ring configurations in which annular elements open on one side may be rotated relative to each other so as to provide a form of equivalent to a closed-ring system. In this system, the heads carrying the gripping dies that engage the pipe are mounted to slide in the rotary. Problems that arose during testing were such that kept the design from being commercially marketed. In practical systems it was found that the Dreyfuss design was such that unbalanced forces were exerted on the dies and the ring system, causing uneven gripping, and the opening in the ring system caused undue wear in the drive gear system. Because of these and other factors the commercial version of this system encountered substantial operative difficulties and is understood to have been withdrawn from the market. Another example of power tongs which can be opened for side access to a pipe is provided by Wallace U.S. Pat. No. 3,023,651, in which a number of hinged sections are employed in a massive and heavy structure that is difficult to place in position and operate, and is not amenable to use with different sizes of pipe.
A different approach is evidenced by Eckel U.S. Pat. Nos. 4,084,453 and 4,089,240. In both of these constructions a partial ring having internal cam surfaces is disposed within a gear driving mechanism that substantially surrounds the partial ring. In the former patent the dies that engage the pipe are mounted on pivotable link members, and a critical "cam angle" is defined that must be between 1/2 and 51/2�. This angle is additionally critical because the two dies on a link member are at different radii relative to the pivot axis, and act symmetrically on a given size pipe only within a very small part of their travel. In the latter patent each member, holding the dies provides rectilinear movement, but this is achieved by employing a guide rod sliding within a guide passage in the member. The arrangement is relatively complex and imparts substantial bending moments on the guide rod and the receiving bearings. A drag mechanism forms an essential part of the system, in order to provide relative movement between the partial ring rotary and the die carrier.
The examples of prior art constructions mentioned also are susceptible to one or more of a variety of other problems. For example, fragments and dirt can enter into the cam devices that are typically used to urge the dies into engagement with the pipe, damaging the cams and causing the dies to lock in or out of position.
Many designs also are such that die loading becomes increasingly asymmetrical as pipe size is reduced, substantially increasing die wear and the probability of damage. A power tong should preferably be able to cover a range of pipe sizes without difficulty, and if a further pipe size change is needed it should be effected with only an interchange of parts. Maintenance and life problems have an economic significance far in excess of the cost of the dies or even the pipe involved, because the down time that results when replacements or repair must be made involves not only material costs but also drilling crew costs and the continuing charges for other specialized tool equipment present at the drill rig. Thus a power tong system which requires frequent replacement of dies or other elements or which causes undue damage to sections in a pipe string would be far inferior to a power tong system which operates steadily and uniformly.
As those skilled in the art are aware, the extremely high stresses and abrupt shocks encountered in operation are usually attended by visible strains on the equipment and by vibrations and sharp impacts which results in a very short fatigue life for the parts involved and the unit as a whole. These are caused by overload or unbalanced force conditions which are further evidenced by undue wear, slippage or equipment damage.
The referenced patents, and the pertinent literature, place substantial emphasis on the use of drag or braking techniques to secure proper biting of the dies relative to the pipe. As the rotary is driven the head or other member supporting the dies is frictionally restrained to insure that the dies do not simply rotate with the rotary. Inasmuch as most power tong systems use approximately 2500 to 3000 psi of hydraulic pressure for driving purposes, and inasmuch as the drag typically requires a pressure of approximately 700 psi, a substantial part of the available energy is effectively used only for overcoming this braking friction. The driving energy available for the power tongs thus is reduced in at least the same proportion. Actually, the total loss in efficiency can be substantially greater, because both the hydraulic system and the prime mover may be operating in less efficient regimes. That is, at higher pressure levels torque may not increase in linear fashion.
Power tong systems in accordance with the invention incorpoate an annular rotary member having a hinged section which may be opened to permit side access to a pipe. The rotary member has an interior cam surface engaged by cam followers mounted on radially movable head plates which slide between side bearing surfaces disposed in substantially rigid upper and lower head plates that are open at one side to permit pipe entry and egress. Peripheral drive of the rotary member radially shifts the facing dies into engagement with the pipe, thereafter rotating the pipe, rotary member and head plate assembly together in the chosen direction. For disengagement the rotary member is driven through a small angle in the opposite direction. With this system, extremely high torques may be exerted with little die wear and with freedom from pipe damage, with only changes in the heads being required to permit operation with different ranges of pipe diameters.
In accordance with other aspects of the invention, the heads slide radially in bearing slot surfaces in the upper and lower head plates, which are rotatable about the central axis relative to the housing and to the rotary member. The side bearing surfaces in the structurally rigid head plates restrain the heads against twisting moments, so that there is both minimum wear and uniform head movement. The system is virtually free from contamination by dirt or fragmentary matter, because the wiping action of the bearing blocks on the associated slots tends to keep such matter from coming between bearing surfaces, and the cam followers and cam surfaces are disposed well behind the heads and out of the path of contaminants. The system as tested is found to be self-cleaning instead of self-clogging. Though external drag can be applied to the head plates for special applications, it is found that for the great majority of applications the system smoothly engages and disengages without the application of any external drag whatsoever.
A better understanding of the invention may be had by reference to the following description, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a perspective view, partially broken away, of a power tong system in accordance with the invention;
FIG. 2 is a plan view, somewhat simplified, of the system of FIG. 1;
FIG. 3 is a plan view, partially broken away, of the rotary member, head plate and heads in the system of FIG. 1;
FIG. 4 is a side sectional view, taken along the lines 4--4 in FIG. 2 and looking in the direction of the appended arrows, of the arrangement of FIG. 1;
FIG. 5 is a side sectional view, taken along the lines 5--5 in FIG. 2 and looking in the direction of the appended arrows, of the arrangement of FIG. 2;
FIG. 6 is a plan view of the rotary member of FIG. 2, showing a hinged portion thereof in open position;
FIG. 7 is a fragmentary perspective view of a portion of the rotary member, showing the interlocking relationship to the base portion of the rotary member;
FIG. 8 is a side fragmentary view, partially in section, of the same portion of the mechanism as shown in FIG. 7, showing further details of the mechanism as seen looking in the direction of the appended arrows;
FIG. 9 is a fragmentary perspective view of the arrangement of FIG. 2, showing further details of the arrangement of the heads and head plates;
FIG. 10 is a perspective view of the hinged portion of the rotary member and the hinged portion of the housing showing a mechanism for adjusting the relative positions thereof;
FIG. 11 is a simplified fragmentary perspective view of a biting pin arrangement for limiting relative motion between the rotary member and head plates in different directions of rotation;
FIG. 12 is a simplified plan view of various operative portions of the system, showing force distributions therein;
FIG. 13 is a fragmentary perspective view, partially broken away and somewhat idealized, showing details of a mechanical-hydraulic interlock system used in the arrangement of FIG. 1; and
FIG. 14 is a schematic diagram of the arrangement of hydraulic mechanisms and hydraulic circuits used in accordance with the invention.
A power tong system in accordance with the invention is described in terms of an example of a heavy duty system for high torque (e.g. approximately 50,000 ft.-lb.) applications, such as are encountered with 9" to 12" outer diameter casings used in oil drilling rigs. A system which can satisfactorily handle the high torque problems can obviously be scaled down to a smaller and lighter size, and thus the description confronts one of the most difficult situations to be overcome. However, the system described hereafter can be used with a range of pipe sizes, simply by interchange of head blocks. The lower limit on the size of the pipe which should be handled is actually determined by the mass, bulk and cost of the unit. Inasmuch as power tongs are typically suspended from a lifting system, moved into position about the pipe or casing, and then actuated to thread or unthread adjacent sections, it will generally be preferable to employ a smaller model based upon the same principles when low torques are involved or small diameter pipes are to be manipulated.
In a system in accordance with the invention, referring now to FIGS. 1 and 2, the power tong is configured to incorporate a generally but not completely enclosed main housing 11 for encompassing a pipe or casing 10 within the base portion of an annular structure 12 that principally encompasses the pipe 10. A completely closed structure is formed by a movable hinge section or door 14 which bridge the curved arm sections 15, 16 when closed, thus defining a circumferential aperture that is larger than the pipe 10 to be received. By pivoting the movable hinge section 14 open the power tongs can gain side access to a pipe 10, after which the hinged section 14 may be closed and the pipe engaged and driven. The central axis nominally occupied by the pipe also corresponds to the central axis of the aperture within the housing 11 and is an operative reference axis for the system. Spaced apart from the reference axis, a hydraulic radial piston motor 17 and associated transmission section 18 are coupled in conventional fashion to a hydraulic power source 20 (shown only generally in FIG. 1). The hydraulic power source 20 generates a suitable high pressure (3000 psi in this example) when driven by a typical prime mover (not shown). A control valve unit 22 mounted on the housing 11 includes control levers 24, 25, 26 positioned on the side of the housing 11 and readily accessible to an operator to control engagement and disengagement of the dies as well as the direction of drive, through hydraulic lines 28 coupled to the motor and transmission section 18. A hydraulic piston 30 mounted on the housing 11 is also coupled to open and close the hinged section 14, under control of the operator via lines 32 connected to the control valve unit 22. For safety and reliability a system of sequence interlock controls 34 (described below in detail relative to FIGS. 13 and 14) may be arranged in conjunction with the control unit 22 and the hinged section 14. A latch member 35 pivotable about a pivot pin 36 on the housing 16 engages a toothed surface adjacent the free end of the hinged section 14 to insure complete closure. The latch member 35 is actuated by a latch cylinder 37 in response to the sensing of the position of the hinged section 14 by a cam-operated valve (not shown in FIGS. 1 and 2), as described below. The sequence interlock controls also assure that the control levers will not operate the motor when the door is open. A cam operated valve 39 (not shown in detail) is mounted on the housing for use in the interlock control system.
A number of the principal operating elements interior to the housing are best seen in the plan views of FIGS. 2 and 3 to which reference is now made, although the side views of FIGS. 4 and 5 and the fragmentary views of FIGS. 6-10 will also be referred to in this connection. Central to the physical arrangement and functioning of the power tong system is a rotary member 40, which comprises an approximately C-shaped main section 42 and also includes a hinged section 43 which when closed completes an annulus about the central reference axis. As also seen in FIG. 6, a hinge pin 45 disposed adjacent one end of the main rotary section 42 traverses a terminal groove within which a matching tongue 47 on the hinged section 43 is received, enabling the hinged section to pivot between open and closed positions. At its opposite end, the hinged section 43 has a curved interlocking tongue 50 (best seen in FIG. 7) that is concave in a direction normal to the horizontal plane of the rotary 40, and is centered about the mid-height of the rotary but is only a fraction of the total height of the rotary. Adjacent the interlocking tongue 50 the hinged section 43 includes a groove 52 that is curved about the pivot axis as a center point--the interlocking tongue 50 also defines a circumference about the same point. In complementary fashion, the main rotary section 42 includes an interlocking terminal tongue 54 and adjacent groove 56 which curve about the same point and are in registry with the groove 52 and tongue 50 respectively when the hinged section 43 is in the closed position, as in FIG. 3.
The inner (closest to the adjacent grooves) side walls of the tongues 50, 54 are at a slight angle relative to a circumferential plane about the pivot axis, such that the tip of each tongue 50, 54 is wider than the root. In this example, the angle is approximately 3� to a parallel to the pivot axis. Consequently, a circumferential strain on the rotary 40 exerts a force component along these angled side walls which tends to force the two sections 42, 43 together, resting the tongues in the bottoms of the respective grooves and maintaining the sections 42, 43 centered about the mid-height plane of the rotary 40 (best seen in FIG. 8).
The rotary 40 includes, in both sections 42, 43 annular upper and lower guide grooves 58, 59 (the upper groove 58 appearing most clearly in the plane views of FIGS. 3 and 6 and the lower guide grooves 59 showing in the side views of FIGS. 4 and 5) in its upper and lower faces. These guide grooves 58, 59 are concentric with the central axis and provide substantially complete circular tracks when the hinged section 43 is closed. The inner circumferential surface of the rotary also is substantially continuous between the main and hinged sections 42, 43, and defines a dual symmetrical cam system. As best seen in FIGS. 3 and 6, radially opposed negative (concave) cam lobes 61, 62 in this inner surface provide unload or disengagement positions for associated mechanisms. Adjacent each negative lobe 61 or 62, curved ramp surfaces 64, 65 define arcs of decreasing radii which join with the principal interior circumference of the rotary 40. The outer periphery of the rotary 40 includes upper and lower rows of sprocket teeth 67, 68 respectively (see FIGS. 6-8) for chain drive operation.
The drive system for turning the rotary 40 about the central axis (referring now to FIGS. 2 and 3) operates off a drive sprocket 70 rotating about a drive shaft 71 which is in turn rotated by a speed reducing system (not shown in detail) actuated by the hydraulic motor that provides the motive power for the rotary 40. A pair of idlers 73, 74 are spaced apart, adjacent to the outer periphery of the rotary 40, to define a wrap angle for a double drive chain 76 of limited arc (here less than 90�) about the outer periphery of the rotary 40. Rotation of the drive shaft 71 through the speed reducing system thus rotates the rotary 40 about the central axis in either direction of rotation. Because of the limited angle of wrap of the drive chain 76 on the rotary 40, lateral thrust forces are exerted on the rotary 40, and these are absorbed in load-bearing rollers 78 mounted in the housing 11 at spaced-apart points within and along the upper and lower guide grooves 58, 59. The weight of the rotary 40 is held off the ends of the rollers 78 by aluminum bronze bearing blocks (three in this example) 77 disposed symmetrically about the rotary 40 at the lower plate of the housing only, as seen in the side view of FIG. 4 and the plan view of FIG. 3. The support blocks 77 are held in place by support bolts fitting within central recesses and secured by mating nuts at the outside of the housing. The bearing blocks 77 hold the rotary 40 slightly above the upper ends of the lower bearings 78, so they have no end loading to absorb.
However, only one pair of lateral load-bearing rollers 78 is employed in the arc defined by the movable hinge section 14 of the housing 11. In this region, the single load-bearing roller 78 is mounted in a small support plate 79 which overlaps a cutout portion 80 in the housing for the movable hinge section 14. A number of set screws 82 secure the support plate 79 in the top face of the housing for the moving hinge section 14. Slots (not shown) may be used to permit radial and circumferential adjustment for precise location of the associated load-bearing roller 78 relative to the guide groove in which it rests. The principal function of this roller 78 is not to absorb lateral thrust loads, but instead to permit precise closure of the hinged section 43 of the rotary relative to the main section 42. It will be appreciated that a comparable structure is also used in the underside of the movable hinge section 14. Such adjustable load-bearing roller or rollers can be employed at only one axis along the arc of the hinged section, because the pivot axes of the hinged section 43 of the rotary and the movable hinge section 14 of the housing 11 are different. Thus as the hydraulic piston 30 is actuated to close the hinged section 14 of the housing, the roller 78 pair which carries the hinged rotary section 43 with it must shift in position along the length of the section 43. The relative shifts in position for two such elements relative to the hinged rotary section 43 would be different at different points in time, and the system would bind unless excessive tolerance were introduced, which is not permissible either for precise closure or for continuous operation of the rotary.
A pair of upper and lower head plates 92, 93, slidably mounted on circumferential bearing pads 95 disposed on the inner periphery of the housing 11 about the central opening are coupled by pins 96 and held under controlled compression by springs 97, as best seen in FIG. 5. The spring loading permits adjustment of compression and allows reasonable movement of the head plates 92, 93 under load, and eliminates binding and galling between the heads and head plates. The head plates 92, 93 are generally C-shaped and have open ends which are aligned, in the access position, with the hinged section 14 of the housing and the hinged rotary section 43. High strength materials are selected and adequate thickness and width of material are used for the head plates 92, 93 to insure that there is minimum deflection under load. Each of the head plates 92, 93 includes, as seen in FIGS. 3 and 5 particularly, a pair of radially opposed and spaced apart head slots 98, 99 along the same axis normal to the central reference axis of the system, with the lower head slots 99 in vertical alignment with the upper head slots 98. A pair of heads 101, 102 having upper and lower bearing blocks 103, 104 respectively are configured to mate with a sliding fit in the appropriate upper and lower head slots 98, 99 respectively. By this arrangement the heads 101, 102 are constrained to slide radially relative to the central axis, while moving circumferentially with the head plates 92, 93 as the latter are turned during operation. The bearing blocks 103, 104 provide substantial side bearing surface area for transmitting circumferential forces about the central axis, and torsional or twisting forces acting on the head itself, from the head 101 or 102 to the head plates 92, 93.
Referring to FIGS. 3 and 5 and head 101 specifically, elongated dies or grippers of suitable high hardness material are positioned in the interior face of the head 101, within retainer slots 109. The arrangement at the head 102 is the same and the description need not be repeated. Retainer pins 111 extending through apertures 112 in the head plates engage the heads at slots 113 which prevent full displacement of the heads unless the pins 111 are removed, but do not restrict normal operation.
Cam follower rollers 118 are mounted on the heads 102 on shafts 119, so as to rotate about axes that are parallel to the central reference axis as the cam follower roller 118 engages the interior cam surface of the rotary member 40. In the position shown in FIG. 3, the cam follower rollers 118 are resting within the negative lobes 61, 62. However, during operation the relative displacement does not extend beyond a limited arc defined by the ramp surfaces 64, 65. It will be appreciated that the heads 101, 102 that are shown can be removed and that other heads of different sizes and shapes may be substituted. Each head size can accept a range of pipe sizes, while assuring that the dies 108 or 109 of each pair operate with like forces on the pipe. In accessing to pipe 10, buffer plates 120, 121 coupled to the upper and lower head plates 92, 93 respectively and positioned intermediate the heads 101, 102, prevent damage from impact by the pipe until it is positioned. All sliding surfaces, such as the contact surfaces between the head plates and the bearing pads, and between the heads and the head plates, and between the chains and sprockets, are coated with heavy duty lubricant prior to operation.
With reference particularly to FIG. 11, forward and reverse holes 125 and 126 are provided in the upper head plate 92, and a biting pin 128 mounted on a pivot link 130 is pivotable about a pivot pin 132 mounted in the head plate 92. The biting pin 128 is insertable in either hole 125 or 126, to engage either side of a stop block 134 set into the adjacent face of the rotary 40. With the biting pin 128 in the appropriate position, the drive can be actuated in the forward or reverse direction to couple or decouple pipe. When it is desired to effect an opposite function, however, such as to disengage after engagement, the stop block 134 limits the extent of movement, as will be more apparent from the discussion of the head block operation below.
Although not found necessary in practice, as described below, a brake band 136 can be mounted about a major portion of the periphery of the head plates 92, 93, as seen only in FIGS. 1, 4 and 5. In conventional fashion, the brake band 136, if used, can be tightened or loosened by threaded anchor pins at each end that are adjustable in brackets mounted on the housing 15 (as depicted only generally in FIG. 2).
In operation, the power tong is typically used in the field by being suspended from a crane or a hoist, with chain hooks engaging eyes within brackets (not shown) extending from the housing 11. The movable hinge section or door 14 of the housing is open, also drawing open the hinged section 43 of the rotary 40, as seen in FIGS. 6 and 10 particularly. In this access position for receiving or being withdrawn from a pipe or casing 10, the openings in the head plates 92, 93 are also aligned with the opening in the housing 11, in the position shown in FIGS. 3 and 9. As seen in FIGS. 3 and 6, the cam follower rollers 118 of the heads 101, 102 rest in the concave cam lobes 61, 62 in the rotary 40. Thus the heads 101, 102 are radially displaced away from the central axis, and a pipe 10 may be inserted with its longitudinal axis parallel to the central reference axis of the system, via the side opening thus provided. To describe a complete cycle of operation, it is assumed first that the hinged sections are opened to receive a pipe 10 which is to be decoupled from the uppermost end of a pipe string. At this point in time, the hydraulic system is fully pressurized and the operative controls ready to function.
When the pipe 10 is within the circular aperture defined within the housing 11, the door 14 may be closed without regard to whether the pipe is precisely enough positioned for engagement to occur. Actuation of a control lever 24, 25 or 26 actuates the hydraulic piston 30, causing the door 14 to rotate about its pivot axis, closing its free end against the free end of the opposite curved arm 15. Concurrently, the single guide roller 78 resting in the guide groove in the movable hinge section 43 of the rotary 40, and adjusted to a predetermined position relative to the door 14 of the housing, moves the rotary hinge section 43 about its hinge pine 45 (as best seen in FIG. 10), closing the rotary 40. The arcuate interlocking tongues 50, 54 on the hinge section 43 and the principal section 42 of the rotary register in the grooves 56, 52 respectively in the opposing members. When the rotary hinge 43 is fully closed, as seen in FIG. 3, the interlocking tongues 50, 54 are concentric on a radius about the hinge pin 45. Thus as spreading forces are exerted on the rotary 40, the major force component through the hinged section 43 is on a straight line between the hinge pin 45 and the interlocking tongues 50, 54. The points at which forces are exerted by the cam follower rollers 118 are always somewhere on the principal body of the rotary 40, so that only the force exerted by the spreading tendency of the opposite free ends of the principal section 42 of the rotary 40 must be reacted against by the hinged section 43. When the door 14 is closed, the sequence interlock controls 34 actuates the latch cylinder 37, engaging the latch 35 to the door 14 at its free end.
With the hinged sections suitably secured, and a closed ring structure formed, inadvertent errors in operating the sequence of controls create little likelihood of equipment failure. If the hinged sections are open, however, or if they are not fully closed, then driving of the rotary can damage parts of the equipment. This is found in practice to occur, either because of an attempt to sequence too fast, or because of simple inadvertence. The sequence interlock controls 34 assure that the control valve unit 22 cannot be actuated to rotate the rotary member 40 in either direction unless there is full closure, an aspect which is more fully described hereafter.
Once the rotary hinge 43 and the door 14 are fully closed and secured, power may be applied to the rotary 40 through the chain drive 76. In the "make" direction, the drive chain is driven, as seen in FIG. 3, in the counterclockwise direction, immediately shifting the cam follower rollers 118 out of the concave lobes 61, 62 which they occupy in the access position, and onto the adjacent ramps 65 which urge the heads 101, 102 radially inwardly toward the central axis and with the dies 108 in proximity to the pipe exterior. The initial distance to be traversed is the gap provided in order to have sufficient clearance to enable side accessing of the pipe. After the initial fairly rapid increment of movement, the ramp surfaces 65 (in this example) more slowly drive the heads 101, 102 inwardly, so that the dies 108 engage and then grip the centered pipe 10. If the pipe 10 is not precisely positioned, the symmetrically disposed dies 108 nonetheless force it into position for uniform exertion of radial force by the individual dies as the heads 101, 102 come together. An initial rotation of less than 10� of arc is sufficient to engage and grip the pipe 10, and with the proper heads for a chosen pipe size, the cam follower rollers 118 do not move beyond the limited arc defined by the outer limits of the ramp surfaces.
In most practical applications of power tong devices in accordance with the invention, no brake, drag or frictional restraint need be employed to induce the needed relative motion between the heads 101, 102 and the rotary 40. Even though the head plates 92, 93 in which the heads 101, 102 are mounted rest on bearing pads 95, and the contact surfaces are fully lubricated, so that the frictional restraint on head plate movement is low, the head plates 92, 93 do not turn with the rotary 40. It appears that the system is evenly enough balanced, and frictional restraints on radial movement of the heads 101, 102 are sufficiently low, that the relatively small friction in the head plate system is sufficient to cause the cam follower rollers 118 first to leave the concave lobes and then to ride up on the ramp and initiate engagement between the dies 108 and the pipe. Once such engagement is obtained, of course, high frictional forces are encountered and the reaction force transmitted from the pipe to the rotary 40 as a spreading force is encountered insures locking of the head plate, head and rotary system into a temporarily unitary structure having no relative movement between the parts. Thereafter, for as long as is needed for the pipe sections to be coupled, the chain drive 76 rotates this system until full threading is obtained. A large percentage of the time a pipe shoulder is encountered which impacts the system and causes it to lock.
With the pipe sections having been coupled the next operation is to disengage the power tong from the pipe 10. A control lever 24, 25 or 26 is actuated to reverse the rotary 40 direction, driving the cam follower rollers 118 back toward the concave lobe 61, 62 positions. Again, no frictional restraint or braking force need be exerted to break free of the pipe. During the initial phase of disengagement, the dies 108 are secured to the pipe 10 surface, and no braking effect would be needed in any event. As soon as the dies 108 are loose relative to the pipe 10, however, it appears that the friction in the head plate bearing system is again adequate, along with centrifugal force, to return the heads 101, 102 to rest in the access position. This freedom from the use of braking or drag effects eliminates the need for what might be called a deadband in the hydraulic pressure range, in which a substantial amount of useful energy (represented by up to 700 psi of hydraulic pressure) must be expended solely for overcoming friction. Under these conditions, as much as 20-25% of the pressure available in a 3000 psi system is effectively wasted. Instead, practically all of the hydraulic pressure range is available for useful work, enabling a given unit to apply more foot-pounds of torque to the working section of pipe than would otherwise be the case. The ability to operate without drag is not merely theoretical, but has been confirmed by substantial testing in the field under operating conditions.
In counterrotating the rotary 40 away from the engagement position (counterclockwise as viewed in FIG. 3), there would of course be a tendency for the cam follower rollers to continue past the concave lobes 61, 62 at the access position, so as to move the heads radially inwardly to again engage the pipe and attempt to decouple it. However, with the biting pin 128 (FIG. 11) in the forward position hole 125, the stop block 134 is immediately engaged as soon as a slightly over-center position is reached. Thus the head plate 92 and rotary 40 assembly again commences to rotate as a unit, but this time free of the pipe 10. For any succeeding accessing operation, the operator need only position the rotary in the access position, with the hinged rotary section 43 in alignment with the hinged door 14 and the housing 11.
To complete the operating sequence, a previously coupled pipe in a pipe string may be decoupled by driving the chain drive 76 in the opposite (clockwise as seen in FIG. 3) direction, so as to drive the heads 101, 102 inwardly on the opposite ramp surfaces 64, engaging the pipe 10 and then rotating it in the counterclockwise direction until fully decoupled. The heads 101, 102 may then be disengaged from the pipe 10, with the biting pin arrangement eliminating any further tendency to recouple, and the rotary 40 returned to the access position. At this point the hydraulic piston 30 may be actuated so as to open the door, permitting removal of the power tong from the side of the pipe.
It should be appreciated by those skilled in the art that, unlike the great majority of existing systems, this power tong in accordance with the invention operates smoothly, with little noise, and with symmetrical gripping of the pipe by the dies. In practice, galling or damage of the pipe are eliminated for all practical purposes, even when maximum torques are applied. A review of the geometrical and force diagrams of FIG. 12 will aid in understanding how this smooth and balanced operation is effected.
When the hinge section of the rotary is closed, and the self-centering interlocking feature is in operation, engagement of the dies on the heads to the pipe introduces a spreading force or circumferential force on the rotary body. The hoop strength and deformation characteristics of the rotary are sufficient to contain this force without distortion. Spreading forces act along a tangent between the pivot P and the arc K of the interlocking groove geometry in which the hinged section is seated, but do not introduce distortion of the hinged section. The thrust absorbing rollers mounted in the housing and seated within the annular guide grooves in the rotary at various points through a substantial angle, have the primary function of reacting against the lateral thrust exerted along the plane of the rotary by the drive chain acting on one side. The hinged section does not essentially disturb the symmetry of the rotary, regardless of its rotational position.
When under load, the rotary (regardless of its rotational position) must absorb the radially outward forces directed from the follower rollers through a relatively limited arc on each side of the hinge section. As seen in FIG. 12, the relative movement between the heads and the rotary is confined to a limited arc, designated in FIG. 12 as the angle α, and determined by the initial radial spacing of the dies from the exterior of the pipe and the radius of the ramp surfaces. The ramp surfaces (a) lie along an arc that is at a radius r2 from a center 0' that is spaced apart from the central axis O of the system by a distance e. The total angle of possible excursion on either side of center line 2 is only approximately 30�, so that movement of the rotary causes engagement or disengagement within this arc. As noted above, the heads actually wedge into position or become freed somewhere along the intermediate portions of the ramp surfaces (a) adjacent the concave center cam lobe positions. The angle of rotation to cause biting is designated φ, while the included angle between radii r1 and v2 is designated θ, the cam angle. The cam angle θ is preferably between 6� and 12� in this system. Because the radius r2 is less than the radius r1, there is a slight circumferential force component (F1) acting on the cam follower roller when the cam surface is in the position shown in dotted lines as a' (in the opposite direction when the rotary is shifted in the opposite sense). The force F1 is the force on the roller due to torque T applied to the rotary, so that F1 =T/r1. F2 is the force due to the wedging action of cam angle θ, i.e. F2 =F1 /sin θ. The reaction forces on the roller are transmitted to the head at point A, on the opposite side of the bearing. The significant question is whether the force F1 acting at the radius n will introduce significant torque about the point C on the die. However, under load the force F3 is always much greater than F1, and the moment F3 n is therefore also substantially greater than the moment F1 n. Thus even under load the head plate carries no significant torsional load to cause unequal biting or wedging of the dies. Another factor which contributes to this superior result appears to be adequate structural rigidity under load to minimize distortion. With minimal distortion, stress variations are reduced and wear will be low, and this has been found to be the case in practice. Any torsional forces that exist are reacted against by the side bearing faces engaging the head bearing blocks. These bearing faces are large in area and spaced well apart, and the head plates are sufficiently massive and rigid to provide relatively fixed bearing surfaces. This means in turn that the heads, once the dies are engaged, are not permitted to move other than radially relative to the central axis of the pipe, so that in consequence the four dies (in this example) act substantially uniformly on the pipe. Consequently, force symmetry is maintained despite dimensional variations in the pipe and in the dies themselves, over a substantial range. Further, the high radial forces needed for high torque loading are uniformly distributed and are not excessive at any one die. In prior art systems, lack of an equivalent balance permits one die to dig in more than another, damaging or in some instances destroying the pipe or part of the associated mechanism.
The high torques and forces involved in decoupling or coupling the pipe must of course be overcome by comparable forces at the drive system. With a limited wrap angle of drive chain relative to the outer periphery of the rotary, the lateral force exerted in the plane of the rotary becomes very high. However, this does not cause distortion of the rotary, as the majority of the lateral thrust force is absorbed on the same side that is exerted. The most highly stressed portion of the rotary at any instant is that portion facing the wrap angle of the drive chain, and only in the region between the outer sprocket teeth and the corresponding arc of the guide groove. These are compressive stresses which are localized and readily taken up in a rotary as described herein.
There are as well many other operative advantages to this system. It is a compact unit with a convenient geometry for gaining side access to a pipe by a small crew that requires no more than normal training. The controls are readily accessible and simple enough, together with the interlock features, to prohibit improper use of the tong operative mechanism. Further, the problems that are encountered with most prior art systems as to dirt and debris contamination do not present substantial difficulties in this system. Chips and splinters which might be generated at the contact regions between the die and pipe are well separated from the interior periphery of the rotary, and are not carried back into the rotary structure to tend to wedge between the cam follower rollers and the inner cam surface on the rotary. Furthermore, dirt and particles which do fall on the exposed surfaces of the heads are wiped clean as the heads move radially inwardly and outwardly relative to the central axis, and there is no need for shielding or protective structure although one could be provided.
Details of the principal mechanical and hydraulic devices used in the interlock system may best be seen in the fragmentary and somewhat idealized view of FIG. 13, as well as in the schematic view of FIG. 14. Reference must be made to FIG. 14 for the detailed hydraulic interconnections that are employed, because these are not specifically shown in FIG. 13. The principal controls for the operator are the control arms or levers 24, 25, 26 extending from the control valve unit 22, which in this specific example comprises a three-spool stack valve, one spool of which is a door control spool 140, a second of which is a motor control spool 141, and a third of which is the lift cylinder spool 142 that controls vertical movement in the associated system, and which is coupled by conventional means and need not be further described in detail. Pressurized hydraulic fluid from the power source is coupled to each spool 140, 141, 142 and appropriately returned, depending upon valve settings, to a drain. If one of the spools is operated fluid is coupled through the appropriate one of the various controlled mechanisms, including the door cylinder 30, the latch cylinder 37, and the lift cylinder 145, and the direct drain connection is decoupled. Control is also exerted, of course, over the direction of operation of the motor 17.
As best seen in FIG. 13, the cam operated valve 39 is physically mounted on the upper plate of the housing, and includes an axial shaft 146 terminating in a cam follower 147 that is biased in the direction toward the free end of the door 14, specifically to engage a protruding tooth portion which is to be locked by the latch member 35. A spring 148 biases the cam follower in the direction toward the hinge, and a two position valve element 150 (FIG. 14) within the valve 39 provides communication between inlet and outlet ports when the cam follower 147 is forced back by full closure of the door 14. The system also includes a pressure responsive sequence valve 152 and a two position interlock valve 154, shown only generally in FIG. 13, each of which may be placed on the housing of the rotary or adjacent the motor 17, as desired. The sequence valve is pressure adjustable to provide communication of hydraulic fluid from the latch cylinder 37 circuit to the interlock valve when a predetermined pressure level (typically 500-2000 psi in this example) is reached. The sequence valve is shunted by a check valve 156 in conventional fashion. The movable valve element for the interlock valve 154 is actuable to either of two limiting positions, in one of which as shown the valve element provides a conduit between the inlet and outlet ports. The valve element 158 normally occupies the position shown, thus providing a shunt path about the motor 17. When actuated to the opposite position (to the left as seen in FIG. 14), the shunt path is terminated and the motor 17 can be actuated.
The connections between the various elements are not fully depicted in FIG. 13, inasmuch as they are shown more accurately in the schematic diagram of FIG. 14. In FIG. 14, the door control spool 140 and the lift cylinder spool 142 are similar elements, having a normally centered valve member 160 which is biased to be self-centered by a pair of oppositely disposed springs 162, 163. Internal conduits 165 directly intercouple the inlet and outlet ports in one position of the spool 140, whereas conduits 167 provide crossed connections between the inlet and outlet ports on the opposite position of operation. Note that spool or slide valves or other valve configurations may be used, and that the valve spools have been indicated in generalized form for simplicity. The motor spool valve element 170 also provides direct or intercrossed positions between the inlet and outlet ports depending upon whether it is at one limit position or the other. In the centered position, however, the interior conduits 172 couple all ports but one to the drain 144.
The hydraulic interconnections between the various spools 140, 141 and 142 and the various actuated elements will be evident from the following description and need not be traced in detail. In general, however, the source of pressurized fluid is coupled to an input port of each of the three spools 140, 141 and 142, with a pressure relief valve 174 of the adjustable type being in circuit with the drain 144 to limit maximum applied pressure. As shown by dotted lines, this type of commercially available three spool valve couples the pressure source internally through the three spools to the drain until one of the valve spools is shifted. One port of each spool is coupled to the drain 144, and the remaining ports are coupled to the opposite sides of the individual actuating cylinders 30, 37 and 145. The circuit between the lift cylinder spool 142 and the lift cylinder 145 is the simplest, with couplings being made to opposite ends of the cylinder 145 to effect movement in opposite directions. The door cylinder 30, and the latch cylinder 37, are however actuated in an integrated fashion with the interlock valve 154, so as to provide safeguards over motor 17 operation. At the door control spool 140, movement of the valve body 160 to the right (for opening the door) causes a direct coupling of the power source to the left hand side of the door cylinder, moving the door cylinder piston to the right. At the same time, pilot pressure in the line to the left side of the door cylinder 30 opens a pilot check valve 175 via a line 176, coupling the opposite side of the door cylinder 30 (and other elements in the system) to the drain. If the valve body is moved in the opposite direction, the door cylinder piston is actuated to be moved to the left, through the pilot check valve 175. Movement of the door cylinder 30 piston to the left in FIG. 14 represents the direction of movement needed to effect door closure. At the same time as the door closure is being carried out, pressure is applied to the cam operated valve 39, and also to a bypass check valve 177 which shunts the inlet and outlet ports of the cam operated valve 39, but the pressure is applied in the direction such that the check valve 177 does not open. The physical shifting of the door to the closed position acts upon the cam follower 147, and when sufficient movement has taken place to shift the valve body 150 to its right hand position as seen in FIG. 14, then the pressure source is in circuit with the right hand inlet port of the latch cylinder 37, moving the interior piston to the left, which is the direction required to close the latch so as to fully secure the door. Conversely, actuation of the door cylinder 30 so that the piston moves to the right also provides pressurized fluid at the left hand input port to the latch cylinder 37, thus opening the latch to free the door. This opening movement concurrently moves the interlock valve 140 to its normal shunting position, described in greater detail hereafter. Thus closure of the door by full actuation of the piston of the door cylinder 30 to the left is accompanied by the latching action initiated by the latch cylinder, and the circuit tends to remain in this operating condition as pressure builds up in the inlet side of the latch cylinder 37. Sufficient pressure buildup causes opening of the pressure responsive sequence valve 152, transferring inlet pressure to the right hand side (as seen in FIG. 14) of the interlock valve, moving the interior valve body 158 to its left hand position, and closing the shunt circuit about the motor.
In this operating status, the interlock control system now permits the motor spool 141 to be actuated in an appropriate direction, as desired by the operator. If the valve body 170 is moved to the right, pressurized fluid is passed through the motor 17 in one direction, giving a specific direction, while the conditions and the direction of operation are reversed for the other non-centered position of the motor spool 141.
This arrangement prevents the motor from running if the door is not fully shut and securely locked. The cam operated valve 39 is arranged to be responsive to the last 5/16" travel of the door in this example, and not only positive closure of the door but also full actuation of the latch are required to shift the interlock valve 154 to the position in which the motor is enabled. When the shunt path through the interlock valve 154 is in existence, only 50-80 psi of pressure is in the system, this being the pressure loss in the fluid diverted to the drain, and even if there were erroneous actuation of the motor controls there would be only a slight creeping of the rotary and such motion terminates at the first resistance that is encountered. If an attempt is made to open the door, the direct connection between the inlet and outlet ports of the door control spool 140 also couples to the left hand inlet port of the interlock valve 154, reestablishing the shunt path for fluid about the motor 17. If the door cylinder 30 is to open the door, and the cam operated valve 39 has not sufficiently shifted in position prior to movement of the piston in the latch cylinder 37, then back pressure in the right hand side of the latch cylinder 37 causes opening of the check valve 177, which functions to provide a return path and permit release of the latch.
Although there have been described above and illustrated in the drawings various forms and modifications in accordance with the invention, it will be appreciated that the invention is not limited thereto but encompasses all variations within the scope of the appended claims.
Patent Citations
Referenced by
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Cannes: Netherlands Film Fund Unveils 30 Percent Rebate Scheme
The Netherlands Film Fund unveiled details of its new 30 percent tax rebate scheme, which kicks off this summer and will provide some $27 million (€20 million) annually in cash rebates for local and international productions that shoot in the region.
Under the new scheme, qualifying productions have to invest a minimum of $127,000 (€100,000) in local spend in the Netherlands and can receive a maximum of up to $1.27 million (€1 million) in cash rebates per project.
STORY: Cannes: 'Maps to the Stars' Director David Cronenberg on Indie Films and Portraying Hollywood (Q&A)
The scheme is open both to local features and international co-productions. Features and feature-length animation projects have to have a minimum $1.27 million (€1 million) budget while documentaries budgeted at $343,000 (€250,000) or more can qualify. Productions must have at least 50 percent of their funding and a Dutch distributor in place to be considered. When a project is accepted for the Dutch scheme, producers have six months to complete financing and begin their shoot. Doreen Boonekamp will run the fund as CEO.
The European Commission this week approved the Dutch fund and the government of the Netherlands has earmarked funding for four years.
In addition to having to pass the so-called "cultural test" to qualify as a European co-production, international features will also need to get at least 75 of a possible 200 points to receive funding under the Dutch scheme.
Points will be awarded for such things as having Dutch cast and crew or doing postproduction in the Netherlands.
Details for the fund, as well as application forms, go up on the fund's website, www.filmfund.nl, later on Friday. The first deadline for applications is June 5.
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FILE - In this June 18, 1960, file photo, USGA President John Clock, right, presents the U.S. Open trophy to Arnold Palmer, left, at the Cherry Hills Country Club after Palmer won the golf tournament by rebounding from seven shots behind going into the final round to shoot a 65 for a four-round score of 280 in Denver. Palmer's comeback is considered one of the all-time greatest in sports history. (AP Photo, File)
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Published by Dolores, Developed by Dolores
Genres: Shooting (1 players)
US release date: Sep 4th, 2014 | EU release date: Jul 31st, 2014
Prices: £4.49 (UK) | €4.99 (EUR)
The evil Broccoli, irritated by the fact that kids hate vegetables and love ice creams, has created an army of vegetables to destroy the flavor galaxy. Only the Ice Cream Surfer with the help of his 4 super tasty friends can prevent that.
Straight to the action, we aren't here to tell stories, but for button-mashing. Are you ready to shot Ice Cream balls filled with pure cooling energy?
Ice Cream Surfer is a horizontal scrolling shoot 'em up from the days of old. It tries to capture the classic arcade gameplay of titles such as Gradius while adding its own personal touch, but unfortunately what we end up with is a rather lackluster attempt. The first thing...read full review
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No they're making it from the movie ... Speed Racer: The Video Game
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Thanks Rob. I had no idea this one was published. I'm very happy about it! Yes, Jonathan, it is hard as all get-out, ... Street Fighter 2010: The Final Fight review
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:p p ... TMNT: Smash Up
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cool :p ... TMNT: Smash Up
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