BACKGROUND OF THE INVENTION  
         [0001]    The invention herein relates to an exercise device and more particularly to exercise devices that allow for work done concurrently by multiple muscle groups. This multiple function capability has an advantage in the time saving effect of working a large group of muscles at one time as opposed to several exercises one after the other. The busy schedules of the users are of utmost importance in any physical activity to promote physical health. Few people will or can spend and hour or more in the gym each day. A minimal 30-minute cardiovascular workout followed by 30-40minutes of weight training doesn&#39;t even allow for a quick bite on the way back to the office.  
           [0002]    As more and more individuals work out of their homes, the need for fitness products that are usable in a home setting become more desirable. One of the necessities of a home piece of fitness equipment is in the versatility or variety of exercises that can be done given a specific space requirement of the device. A single device that performs a variety of exercises is very desirable in this respect. If the device also enables two or more exercises to be accomplished in a single composite movement, the device solves both the time and space considerations that would otherwise prevent many users from participating in a fitness program.  
           [0003]    Most health club products are not as sensitive to space as in the home market. As such, traditional health club facilities greatly rely on single function equipment, that is a device that works a particular muscle group. Though health club facilities are obviously dedicated to equipment placement and usage, unlike a home, but the space allotment still has associated costs including building rent. Therefore it is advantageous in many cases to provide equipment that has multiple uses. Traditionally these are generalized devices such as jungle gyms, racks for free weights and linear motion smith machines. Still these are not intended to perform seemingly unrelated movements in unison to save time for the user.  
         SUMMARY OF THE INVENTION  
         [0004]    Present Invention:  
           [0005]    In one aspect, the invention features a frame with a chest pad that is supported by the frame, and may be movably mounted to the frame and a seat that is movably supported on the frame. The seat is mounted such that when it moves relative to the frame, while supporting the pelvic region of a user, the path of motion of the seat enables the chest region of the user to maintain contact with the chest pad. The device may include a resistance arm, which is pivotally mounted to the frame and in mechanical communication with the seat.  
           [0006]    The mechanical communication of the resistance arm may include a substantially rigid drive link with a first end pivotally mounted to the seat and a second end pivotally mounted to the resistance arm. An alternative form of mechanical communication includes a flexible tension member such as any of an item selected from the group consisting of a wire rope, a rubber belt, a Kevlar belt and a nylon rope.  
           [0007]    The system may also include more than one form of mounting to the frame. The seat may be pivotally mounted to the frame. This may be done by use of two substantially rigid links each with one end pivotally mounted to the frame and each with a second end pivotally mounted to the seat. These links are likely pivotally mounted to the frame in such a way that there is not a common axis and also pivotally mounted to the seat without a common axis. The seat may also be slidably mounted to the frame.  
           [0008]    The device may also include a foot support that is mounted on the frame, preferably moveably mounted. In the preferred embodiment the foot support is slidably mounted to the frame by use of a female tube that is mounted directly to the frame, which receives a male tube that is mounted directly to the foot support. This may also include a lock to releasably secure one to the other.  
           [0009]    Additional resistance may also be applied to the user during exercise. This may be accomplished by use of one or more elastic bands or weight plates that are releasably secured to any moving element of the device.  
           [0010]    In another aspects, the invention includes a method of providing an exercise device, which includes the detail as previously disclosed, positioning the pelvic region of the user in the seat and the chest region on the chest pad. The user then extends their legs while applying force to the chest pad, in combination, to move the seat. This concurrently exercises the extensor muscles of the lower body and the flexor muscles of the trunk of said user. This method can also be expanded where the exercise device further includes a resistance arm that is previously disclosed, and then further includes the step of extending the arms of the user, thereby also concurrently exercising the elbow extensor muscles of the user.  
           [0011]    Definition of Terms:  
           [0012]    Unless otherwise defined, all technical and scientific terms used herein have the same intended meaning as would be commonly understood by anyone of ordinary skill in the art to which this invention belongs. To eliminate possible ambiguity, specific terms used herein have been defined, as they would be applied to the present invention.  
           [0013]    An “elbow extensor” is any muscle serving to cause an increase in the joint angle of the elbow or extend the lower arm form the upper arm. This muscle group is also referred to as the triceps or triceps brachii which is the large muscle situated along the back of the upper arm.  
           [0014]    A “hip extensor” is any muscle serving to cause an increase in joint angle of the hip as measured from the anterior aspect of the body within the sagittal (vertical longitudinal) plane. This muscle group is referred to as the gluteus muscles or in common form the buttocks.  
           [0015]    A “leg extensor” is any muscle serving to increase the joint angle of the knee or ankle as measured from the anterior aspect of the body for the ankle and the posterior aspect of the body for the knee. Both are measured within the sagittal (vertical longitudinal) plane. The ankle extensors include the more superficial gastrocnemius muscle and soleus muscle positioned directly deep relative to the gastrocnemius. The knee extensors include quadriceps muscle which is a large muscle located on the anterior aspect of the thigh. This muscle is a generic term covering the vastus lateralis, vastus medialis, vastus intermedius and the rectus femoris. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0016]    The foregoing and other objects of this invention, the various features thereof, as well as the invention itself, may be more fully understood from the following description, when read together with the accompanying drawings, as described:  
         [0017]    [0017]FIG. 1 is an isometric view of an exercise device produced in accordance with a preferred embodiment of the present invention.  
         [0018]    [0018]FIG. 2 is a side schematic view showing a bottom and a top position of an exercise device produced in accordance with the preferred embodiment of the present invention.  
         [0019]    [0019]FIG. 3 is a top view of an exercise device produced in accordance with a preferred embodiment of the present invention.  
         [0020]    [0020]FIG. 4 is a side view of an exercise device produced in accordance with a preferred embodiment of the present invention.  
         [0021]    [0021]FIG. 5 is a three-part side view sequence of an exercise device showing the starting, middle and final positions of an exercise device produced in accordance with the present invention.  
         [0022]    [0022]FIG. 6 is an isometric view of an exercise device with the chest pad rotated to allow entrance to the user, the device produced in accordance with the present invention.  
         [0023]    [0023]FIG. 7 is an isometric view of and exercise device as shown from the rear of the machine, the device produced in accordance with the present invention.  
         [0024]    [0024]FIG. 8 is a side view of an exercise device showing an alternative tracking mechanism for the seat, drive mechanism for the arms and entrance mechanism, the device produced in accordance with the present invention.  
         [0025]    For the most part, and as will be apparent when referring to the figures, when an item is used unchanged in more than one figure, it is identified by the same reference indicator in all figures.  
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0026]    The object of the disclosed invention is to provide an improved device and method for enabling exercise of multiple muscle groups in a single movement on a single machine. In this invention, the muscle groups include the elbow extensors, trunk flexors and the hip, knee and ankle extensors each individually or any combination thereof.  
         [0027]    What is shown in FIG. 1 is an isometric view of a multiple function exercise device  10 . An upper front side view shows a bottom seat  12 , a back seat  14 , which in combination, comprises the seat  16  of the device. The seat enables at least partial support of a user at the lower torso of the user. The seat  16  is supported by a pair of lower links  18  at the lower portion and a pair of upper links  20  at the top portion of the seat  16 . These upper links  20  and lower links  18  are pivotally mounted to the seat and the frame  22  of the device.  
         [0028]    A chest pad  24  is positioned above the seat  16  and is so positioned to engage the chest of the user when the user is positioned on the seat  16 . The chest pad  24  remains stationary to the frame  22  while the device is in use. This offers a reactive force to the user when a force is applied by the user to the pad. When this force is applied to the pad  24 , by the chest of the user, the resultant action is a rearward movement of the seat  16 . The positioning of the links  18  &amp;  20  mandate an upward movement of the seat  16  with this rearward movement. The upward component of the seat  16  and with it at least partial body weight of the user, results in work done by the abdominal muscles of the user.  
         [0029]    A foot plate  26  is mounted to the frame  22  and can be done so in a variety of ways. In many applications it is desirable to movably mount the foot plate  26 . This is done here by use of a female tube  28  that is rigidly mounted to the frame  22  and a male tube  30  that is rigidly mounted to the foot plate  26 . The male tube  30  is received by the female tube  28 . This allows the foot plate  26  to move relative to the frame  22  while maintaining support due to the presence of the telescoping male  30  and female tubes  28 . A lock  32  such as a spring loaded pin, screw pin or any other locking device known in the art can be used to releasably secure the foot plate  26  in various positions relative to the frame  22 .  
         [0030]    The foot plate  26  is used to provide resistance for the user to push against, thereby extending the legs of the user and moving the seat  16  in an upwardly and rearward motion. This motion is similar to that as previously described in that the seat  16  follows a predetermined path relative to the frame  22 . As previously noted, the upward movement of the seat  16  and associated body weight of the user, results in work done by the user. In this case the extensor muscles of the lower body are doing the work. It is also possible to exercise both the legs and the abdominal muscles by concurrently flexing the trunk as the user&#39;s chest is pressed against the pad  24  while the user&#39;s feet push against the foot plate  26 . Both movements causing vertical displacement of the seat  16  and therefore doing work.  
         [0031]    A third aspect to the invention  10  is obtained by use of the handles  34 . The handles  34  are rigidly mounted to arms  36 , which are movably mounted, and in this case, pivotally mounted to the frame  22  at a pivot shaft  38 . Rotation of the handle  34  and resulting arm  36  causes movement of a push link  40 , which is pivotally mounted to the seat  16  at the rod  42 , which also supports the upper arm  20 . This common placement was accomplished by repeated iteration and analysis of the linkage combination and seat  16  movement. This common pivot design is desirable for manufacturing simplicity and aesthetic appreciation, but is not necessary for the function of the invention.  
         [0032]    When the handles  34  are rotated about the pivot shaft  38 , down toward the seat  16 , the push link  40  causes rearward and therefore upward movement of the seat  16 . Again, this seat  16  movement is as previously described. The positioning of the handles  34  and the relative placement of the pivot shaft  38  enables the hands of the user to remain in contact with the handles  34  as the user is seated in the seat  16 . As such, the user can extend at the elbows while seated in the seat  16 . The vertical movement of the body weight of the user provides resistance to the elbow extensors, thus exercising those muscles.  
         [0033]    As stated previously, the seat of the device moves relative to the frame in a similar manner regardless of the mode of displacement used; pressing against the chest pad  24 ; pushing against the foot plate  26 ; or pushing down on the handles  34 . The elbow extensor (triceps) muscles can be exercised alone by movement of the handles  34 . The leg extensor muscles or trunk flexor (abdominal) muscles can also be exercised alone or in combination by the movements as previously noted. The triceps can be exercised concurrently with the legs or the abdominals or all three can be exercised at the same time. The user decides by how much, if any, pressure is placed on each of the handles  34 , foot plate  26  and chest pad  24 , separately or in any combination. In doing so, the user&#39;s workout is infinitely variable and can conform to the amount of emphasis the user places of each exercise movement aspect of the device  10 .  
         [0034]    To more explicitly detail the linkage of the preferred embodiment, a schematic of the linkage is shown in FIG. 2. The handle  34  is connected to the arm  36 , which is pivotally mounted to the frame by pivot shaft  38 . An arm extension  43  provides a support for the push link  40 . The other end of the push link  40  and the one end of the upper link  20  are pivotally mounted to the upper portion of the seat  16  at the rod  42 . The lower link  18  also supports the seat  16 . Downward movement of the handle  34  and arm  36  results in an upward movement of the seat  16 , as illustrated by the elevated (top position) of the seat  16 .  
         [0035]    More detail of the device  10  is shown in the top view in FIG. 3 and the side view in FIG. 4. The general positioning of the device  10  can be seen in these views. The user&#39;s body fits between the handles  34  and attached arms  36  and is positioned on the seat  16  with the body in a traditional seated position. The user&#39;s chest is positioned against the chest pad  24  and hands upon the handles  34 . This constitutes the starting position of the device  10 .  
         [0036]    Movement of the device  10  is illustrated in FIG. 5. Here, FIG. 5a shows the starting position, as has been depicted thus far in the previous figures. A middle position of the device  10  in use is shown in FIG. 5 b  and a final or top position is shown in FIG. 5 c . A simulated body  44  is used to show how the device  10  would typically be used. Typically, when the device  10  reached a top position, as illustrated in FIG. 5 c , the user would reverse the direction of movement and descend back to the position of FIG. 5 b  and then to FIG. 5 a . The process would then be repeated as desired by the user.  
         [0037]    In the starting position, FIG. 5 a , the body  44  is positioned on the seat  16  with the chest against the chest pad  24 . The feet  46  of the body  44  are positioned against the foot plate  26  and the hands  48  on the handles  34 . Forces can then be applied by any, all or any combination of body parts of the user to actuate the seat  16  to a higher position as illustrated in FIG. 5 b.    
         [0038]    These forces applied by the body  44  are illustrated by force vectors F F  as applied by the feet  46  against the foot plate  26 ; F C  as applied by the chest against the chest pad  24  and F H  by the hands  48  against the handles  34 . A force applied by the feet (F F ) results in an extension of the legs of the user to move the seat  16  and a portion of the weight of the user  44  from the starting position in FIG. 5 a  to the middle position of FIG. 5 b  and finally to the final position shown in FIG. 5 c  with little change in the orientation of the force as the movement continues (F F2  to F F3 ).  
         [0039]    Like the foot plate  26 , while in use, the chest pad  24  remains stationary to the frame  22  of the device  10 . The force applied (F c ) causes a substantially horizontal reaction force in the first position. This force (F C2 ) becomes more vertical in orientation in the middle position as the body is elevated and the trunk flexes. This direction change of the force (F C3 ) continues even more as the body  44  is further elevated to the top position. The pad  24  is intentionally round from the side view to accommodate slight misalignments of the body  44  with the machine caused by variations in trunk height and trunk flexibility of individual users. This is desirable, but not mandatory, in that the inventors have found that in application, the device yields a minimal change in position of chest contact of the body  44  relative to the pad  24  during the movement, regardless of user stature, age or sex.  
         [0040]    It is important that the chest of the user is capable of maintaining contact with the pad  24  throughout the range of the movement. That can be accomplished in two  5  ways, either the pad is able to articulate relative to the chest (pad rolls on chest) or for optimal comfort of the user, allow the pad  24  to move relative to the frame  22  (pad roll on machine). In normal use of the device  10 , and in ideal placement of the chest pad  24  relative to the body  44 , no translation of the chest of the body  44  relative to the pad  24  occurs, but the direction of the chest force vector (F C ) changes as the body  44  moves. It has been determined most desirable to enable the chest pad  24  to rotate about an axis bar  46 . This allows the contact of the pad  24  with the chest of the user to remain constant as the pad  24  rotates about the axis bar  46 . The structure of the axis bar  46  provides the structural integrity to enable the reaction force associated with the forces applied by the chest against the pad  24 . This happens as the chest moves relative to the frame  22 , but not the pad  24 , even as the force vector changes in direction from F C  to F C2  to F C3 .  
         [0041]    Any exercise device is only of value if the user is able to use it. The device  10  is shown in FIG. 6 to show one method of entry into the device  10 . The chest pad  24  is supported on the axis bar  46 , which is movably mounted on the frame  22 . This is can be done in a variety of ways, in that the object is to allow the user to gain access to the seat  16 . In the preferred embodiment, the axis bar  46  is pivotally mounted to the frame  22  along an axis that is substantially vertical. In this way the bar  46 , and accompanying pad  24  can rotate away from the opposite side of the frame  22 , thereby opening a space for the user. To secure the bar  46  in place, a notch  50  is placed in the support mount  52 . This notch  50  is capable of receiving the end portion of the bar  46 , thereby releasably securing it to the frame  22 .  
         [0042]    An upper rear view of the device  10  is shown in FIG. 7. This shows more detail of the structure of the arms  36  in the preferred embodiment. The handles  34  attach to the arms  36  and are supported by the frame  22  at a bearing  53 . This bearing  53  rides on the pivot shaft  38 . The arms  36  have an upward stop in the upper brace  54 . This brace  54  has two functions. The most obvious is the upward stop of the arms  36 , thus preventing them from being pulled up excessively and potentially injuring the user or over centering the articulating push link  40 . The second function is the support of the support mount  52 . This enables the support mount  52  to be positioned inside of the arms  36  and yet supported by the frame  22 , which is generally on the outside of the arms  36 .  
         [0043]    A modified version of the invention is shown in FIG. 8. A handle  34  is attached to an arm  36 , which as in the previous figures, is pivotally mounted to the frame  22 . The seat  16  is now supported on the frame  22  by wheels  56  that ride in a track  58 , the track being mounted to the frame  22 . Movement of the seat  16  along the track  58  is enabled by a cord  60  that is connected to the seat  16  and a cam  62 , which is in turn connected to the arm  36 . Thus, movement of the arm  36  results in movement of the cord  60 . The cord  60  is guided by a pulley  62  and directed along the track  58  to the seat  16 .  
         [0044]    The angle (alpha) denotes the angle of the track  58  with respect to the horizontal. This angle is critical, within a range, in that if the angle is to great the vertical component will be to great and the user&#39;s chest will not maintain contact with the pad  24  during the movement of the seat  16 . If the angle is to low, a similar problem will ensue only in the opposite direction. An optimal angle was determined by the inventor to be 56.5 degrees. A preferable range has been determined to be between  51  and  62  degrees as denoted by the angle alpha.  
         [0045]    Also in this figure, an alternative movement of the chest pad  24  is shown. This again is done to allow entrance to the seat  16  by the user. Here, instead of a pivotal mount on the side of the frame, a chest pad arm  64  is used to support the chest pad  24  and this arm  64  is pivotally mounted to the frame  22  behind the user&#39;s head  66 . This allows the chest pad  24  and the arm  64  to be raised over and back of the user, opening the space for the user to enter and exit the machine.  
         [0046]    It is to be understood that a number of combinations are possible in regarding the lengths and positions of the linkages to enable seat  16  movement while maintaining chest contact with the pad  24  and providing constant contact of the user&#39;s hands with the handles  34 . The attached drawings are scaled versions depicting only two versions.  
         [0047]    Additional load can be used on any version of the invention by adding additional weight plates to any moving part, especially the seat  16 . Another variation would be to use elastic cords that are anchored to the frame  22 . The cords can be anchored to resist vertical movement of the seat  16  or assist this movement. This can be accomplished in an infinite number of ways, including mounting a cord to the seat and anchoring it to the frame below or above the seat to add or subtract resistance, respectively or in the form of a torsion spring on any rotating joint.  
         [0048]    In addition, the enclosed information is presented as the preferred embodiment as seen by the inventors. An infinite number of variations and modifications can be made including various forms of additional force (load) application, framework design and linkage arrangements. Both a pivoting and a linear tracking mechanism are disclosed and within each of those designs also exists an infinite number of design variations.
This is a multiple function exercise device that enables simultaneous exercise of several muscle groups. The device includes a chest pad that is stationary to the support frame and a seat that moves in a path of motion that enables the user's chest to remain on the chest pad as the user's legs are extended, thereby causing movement of the seat. This combination provides activation of the leg and hip extensor muscles and the trunk flexor muscles at the same time. In another embodiment, a resistance arm is added that is pivotally attached to the frame and mechanically linked to the seat, thereby causing movement of the arm as the seat moves. This allows the additional activation of the triceps muscles, or elbow extensors of the upper arm, while also working the leg and hip extensor muscles and the trunk flexor muscles all in a single movement. The advantage to such a movement is the time saving effect of working a large group of muscles at one time as opposed to several exercises one after the other.