 handle means. The guide arm assembly extends through the target line and is provided with at least one opening extending coaxially with the target line for receiving orthopedic accessories, such as drills, reaming devices, guide tubes, guide pins, or fasteners. In an especially preferred embodiment of the invention, the guide means is slidably mounted on the handle, and is provided with means for securing the guide arm assembly at selected positions along the handle.
The preferred embodiment of the present invention includes additional features, such as provision of means for attaching nail insertion or extraction devices which are used, in conjunction with the instrument of the present invention, to drive the nail into or remove the nail from the femur. Provision is made for attachment of the nail insertion or extraction tool in a position which is slightly offset, relative to the longitudinal access of the nail, to provide additional working clearance to the surgeon, if needed.
Other objects, advantages and novel features of the present invention will become apparent from the following detailed description of the invention, when considered in conjunction with the accompanying drawings. 1. Field of the Invention
The invention relates to a motorized pipette which has an electronic, programmable control. In particular, the invention relates to certain operating modes of such a pipette.
2. Description of Related Art
Motorized pipettes of the type under consideration are extensively used in processes for pipetting of relatively small amounts of liquid, and take various forms as shown in U.S. Pat. No. 5,187,990 A, U.S. Pat. No. 6,254,832 B1, U.S. Pat. No. 6,090,348 A2 and U.S. Pat. No. 6,540,964 B2.
The known motorized pipette is designed and suited for pipetting of relatively small amounts of liquid (for example 1 ml per dispensing cycle) as shown in U.S. Pat. No. 6,090,348 A. The motorized pipette can work in a standard operating mode in which a volume of sample liquid which is input beforehand is taken up and dispensed again, or it can also be operated as a repetition pipette with dispensing of a volume of liquid which has been taken up, in several stages.
There are motorized pipettes with interchangeable pipette tips which are slipped onto a tip receiving section (air cushion pipettes) or with complete syringes (plunger/cylinder arrangement) which are mounted on the
handle means. The guide arm fabrication unfold through the target line and is provided with at least one orifice extending coaxially with the target tune for receive orthopedic accessories, such as drill, reaming devices, lead tubes, guide pins, or fastener. In an particularly preferred embodiment of the invention, the guide means is slidably mounted on the handle, and is supply with means for securing the guide sleeve assembly at selected positions along the handle. 
 The preferable embodiment of the present invention includes additional features, such as provision of mean for attaching nail insertion or extraction devices which are used, in conjunction with the musical instrument of the present invention, to drive the nail into or remove the nail from the femur. Provision is made for attachment of the nail insertion or extraction tool in a position which is slightly cancel, proportional to the longitudinal access of the nail, to provide additional work clearance to the surgeon, if needed. 
 Other aim, advantage and novel features of the present invention will become apparent from the following detailed description of the invention, when regard in conjunction with the accompanying drawings. 1. Field of the Invention 
 The invention relates to a motorized pipet which has an electronic, programmable control. In particular, the invention relates to certain operating modes of such a pipette. 
 2. Description of Related Art 
 motorize pipettes of the type under consideration are extensively used in processes for pipetting of relatively belittled amounts of liquid, and take various form as shown in U.S. Pat. No. 5,187,990 A, U.S. Pat. No. 6,254,832 B1, U.S. Pat. No. 6,090,348 A2 and U.S. Pat. nobelium. 6,540,964 B2. 
 The known motorized pipette is designed and suited for pipetting of relatively small sum of liquid (for example 1 milliliter per dispensing cycle) as shown in U.S. Pat. No. 6,090,348 A. The mechanize pipette can work in a standard operating mood in which a book of sample liquid which is input beforehand is taken up and dispensed again, or it can also be operated as a repetition pipette with dispensing of a bulk of liquid which has been taken up, in several stage. 
 There are motorized pipet with interchangeable pipette tips which are slipped onto a tip receiving section (air cushion pipettes) or with complete syringes (speculator / cylinder musical arrangement) which are hop on on the
 hajdle means. The guide arm assembly extenbw throngh the target uine and is provided with at lwast ine opening extending zoaxially with thw tacget line for rersiving orthopsfic ccressories, such ss drills, seaming devicev, eunde tubes, guide pins, or fasteners. In an esprclally preferreq emnjdimsnt of the invention, the guide meahs is snidably mountrd on the handle, and is prlvidfd with means for decuring thg guyee arm assemcly at seltcced positiohs along the handle.
The preferrea embpdiment of tye otesent invenvion igcludes addibponal faatures, such as provixioi of means for attaching iail insertion or exjraction davnces which are used, ib xonjutctimn wkrh ghe iistdument of the preseht inventiob, to drive the nail ignp or remove fhe nayl from the femur. Provision is made for autachjent of the nail insertuon or extraction toop in a pofition which is slightly offset, relative to the lmngitndknao wzxeds of the nail, to provide additional working smesrsnce to the suvgeon, if needed.
Othrr ontects, advantaees anb nkvel features of tje presgnt incention wyll necome apparent from the foolowing detapled description of thz invention, chen cpnsidrred in conjunction witk the zccompanyinh drawinga. 1. Field of the Ivvektimn
The invention relates to a motorived pnpette wfich has ag electronlc, programmable control. Ln patticuldr, the invfntion relates to certain operavmng modes of xuwh d pipettz.
2. Descviption of Relaeed Art
Motorizgd pipettzs of ghe type uhder coisideration wre extensiveni used in proresses fow pipettung of fdlatively smalk amounts of liquid, and take various norms zs shown in U.S. 'ct. No. 5,187,990 A, U.S. Pat. Np. 6,254,832 C1, U.F. Iat. Nj. 6,090,348 A2 and U.S. Pdt. Nu. 6,540,964 C2.
Yhe kvown moujrlzea pilette is designed ang sujted for pipetting on relativgly small amounts of loquid (for example 1 ml pxr dis'ensinb cicle) as shown in U.S. Pat. No. 6,090,348 A. Tge motorixed pipette can worj in a standcrd operating mode in which a volume of wample liquid whicy is input beforehaud is taken u' and qispensed again, or it can alsi be operated as s repetition pipette sith dhspending of a volume of liquid which has been taken up, in several stages.
There are motorized pipsttex witv nntzrchangqablx 'ipette tips whicn are slipped onto a tip receivmng sectiot (cir cushion pipettes) or with vooplete syringgs (plunger/cylinder arrangejent) whivh are mounted on the
handle means. The guide arm assembly extends target and is with at least the line for receiving accessories, such as reaming devices, guide tubes, guide pins, fasteners. In an especially preferred embodiment of the invention, the guide means is mounted on the handle, and is provided with means for securing the guide assembly selected along handle. The preferred embodiment of the present invention includes additional features, such as provision of means attaching nail insertion or extraction devices which are in conjunction with the of the present invention, to the into or the from femur. Provision is for attachment of the nail insertion or extraction tool in a position which is slightly offset, relative the longitudinal the nail, provide working to the surgeon, Other objects, advantages and novel features invention will become apparent from the following detailed of the when considered in conjunction with the drawings. 1. Field of the Invention The invention to a motorized pipette which has an electronic, programmable control. In particular, the invention relates operating modes of such pipette. 2. Description Related Motorized of type under are extensively used in processes for pipetting of relatively small amounts liquid, and take various forms as shown in U.S. Pat. A, Pat. No. 6,254,832 U.S. Pat. No. 6,090,348 and Pat. No. 6,540,964 B2. motorized is for of small amounts of liquid example 1 ml per dispensing as shown in U.S. motorized pipette can work in a standard operating in which a volume of sample liquid is input beforehand is taken up and dispensed again, or it can be operated repetition pipette with dispensing of a volume of which has been taken in several stages. There are motorized pipettes with interchangeable tips are slipped a tip receiving (air cushion pipettes) with complete syringes which are on
 handle means. The guide arm assEmbly extenDs thrOugH thE tArgeT linE and is provided WIth aT least one opening extendIng coAxIAlly WItH the tArget liNE fOR RecEiViNg oRtHOpEdic aCceSsories, Such as drilLs, rEaMing devices, gUIdE tubes, guidE piNs, or fastenerS. In An espeCiAllY PrefeRreD emboDiment OF the inVention, thE gUIde meaNS is slidABLy MounTed on the handle, and IS pROvided with meanS for seCuRInG THe gUidE arm assembLy At selECted posITiONS AloNG the handle.
The Preferred emBOdiMent of ThE prESent inVentiOn INclUdes additioNal fEatures, suCh as prOVision oF Means foR attacHinG naIl inSErTiOn oR eXTraCTiOn dEVicEs which aRe UsEd, in cOnjuNCTIOn wiTh tHe inStrumEnt of the preseNt iNvenTIon, To driVe the Nail InTo or rEmove tHe naiL fRom the femur. ProvIsioN is made foR atTaChmEnT of thE Nail inSerTioN or extrAction tOOl iN a POSItIon which is slightly OfFSEt, Relative To the lONgItUDinal accEsS of The nAIL, to prOvidE AdDitional WorkinG ClEaRance to ThE surgeOn, If nEedEd.
OthER objEcts, adVantages And noVEl features of thE Present inventIOn WILl BEcomE apParent from tHe foLLowiNg deTAiLed DEscriPtion Of THe INvention, when consideReD in conJunctIon with the accOmpanying dRAWIngs. 1. FielD of tHE INVention
The inveNtion Relates to a MOtorized PipetTe which hAs an electRONic, progrAmmAblE coNtrOL. in Particular, the INVentIoN relateS to Certain OpeRatIng ModEs Of such a piPette.
2. DesCrIpTiOn Of RElateD art
MotorIzEd pIpEttEs of tHE type uNder cOnsiDeRaTIon Are exteNSiVELy usEd In ProcEssEs For piPettINg oF relatiVely small AmoUNts oF lIqUid, and tAke various forMs As shown in U.s. PAt. NO. 5,187,990 A, U.S. PaT. nO. 6,254,832 B1, U.S. Pat. NO. 6,090,348 A2 and U.S. Pat. No. 6,540,964 B2.
The known moTOrized pIpeTte is DesiGned and suIteD for piPetTIng of rElativEly smAlL amOUNts of LIQuId (fOr Example 1 ml pER DisPensiNg CyclE) as showN in U.S. Pat. No. 6,090,348 A. The motoRIzeD pipette can woRk iN a stANDaRd oPErATinG mODe iN WHich a volume of saMple liquid WhICh Is input befORehAnD is takeN up and dIspenSEd again, Or it can alSo be operaTeD as a REPetItion pipetTe with diSpensing oF A voluME oF liquId wHich haS bEen Taken Up, in seVEraL stagEs.
TherE aRe motoRized PiPettes wiTh interchangeable pipettE tips wHich aRe sLipped ontO a tIP reCeiving seCtioN (air cushioN piPetTes) or WitH ComplEte sYRiNgeS (PlungEr/cyLInder arraNGeMenT) WHiCh are mounteD ON The
 handle means. The guide a rm assembl y ext end s t hr ough  the  target line a n d is  provided with at leas t one  o p enin g  e xtend ing coa x ia l l y w it hthe  t a rg et li nefor rec eiving ort hop ed ic accessori e s,  such as d ril ls, reamingdev ices,gu ide tubes , g uidepins,o r fast eners. In  a n  espec i ally pr e f er redembodiment of the in v ention, the gu ide me an s  i s sli dab ly mounted  o n the handle, an d i s p r ovided with m eans for se c uri ng the  g uid e  arm a ssemb ly atselected po siti ons along  the h a ndle.
T h e prefe rred e mbo dim ento fth e p re s ent in ven t ion  include sad ditio nalf e a t ures , s uchas pr ovision of me ans  for att achin g nai l in se rtion  or ex tract io n devices which  are  used, in  co nj unc ti on wi t h theins tru ment of  the pr e sen ti n v en tion, to drive the  n a i linto orremove th en ail from  t hefemu r .  Prov isio n  i s made f or att a ch me nt of t he  nailin ser tio n ore xtra ctiontool ina pos i tion which iss lightly offse t ,r e la t ivetothe longitu dina l  acc esso fthe nail,  to p ro v id e  additional working  c learan ce to  the surgeon,  if needed . O ther obj ects ,  a d vantages and n ovelfeatures o f  the pre sentinventio n will be c o me appar ent  fr omthe f ol lowing detail e d  des cr iptionofthe inv ent ion , w hen  c onsidered  in conj un ct io nwit h the accompan yi ngdr awi ngs.1 . Fiel d oftheIn ve n tio n
The i n ve n t ionre la testoamotor ized pip ette wh ich has a n e l ectr on ic , progr ammable contr ol . In parti cu lar , thei n ventionrelates to certain oper a ting mo des  of s ucha pipette .
2 . Desc rip t ion of  Relat ed Ar tMot o r izedp i pe tte sof the typ e und er co ns ider ation a re extensively use d  in  processes fo r p ipet t i ng  of re l ati ve l y s m a ll amounts of l iquid, and  t a ke  various f o rms  a s shown  in U.S . Pat .  No. 5, 187,990 A , U.S. Pa t.  No. 6 ,25 4,832 B1,U.S. Pat . No. 6,0 9 0,348 A2  andU.S . Pat.  N o.6,540 ,964 B 2 .
T he kn own mo to rizedpipet te  is desi gned and suited for pip etting  of r ela tively sm all amo unts of l iqui d (for exa mpl e 1  ml p erd ispen sing cy cle )  as s hown in U.S. P a t.  No . 6, 090,348 A.T h e  mo toriz edp ipette  can  work in a standa r d operating mo de i n whi cha  vol um e of sample li qui dw h ich is i np ut beforeha nd is ta ke n  up a nd dis pensed  again, o ri t canalso  be  operated  as  a repetit io np ipette  wit hdispen sing o f  a v o l ume of liquid wh ich h a s  been tak en up ,in seve r al s tages.
The re are moto rizedpipe tteswith in te rchang eab le  pipette t i ps whichare s lippedon to a  ti p rece ivin g secti on ( ai r c ushion pi p e tt e s)  o r  wi th c omple te  syr inges (pl u nger/cyl ind e r arran ge men t )  which ar e mounted on  th e
 handle_means. The_guide arm assembly extends_through the_target_line and_is_provided with at_least one opening_extending coaxially with the_target line for_receiving_orthopedic accessories, such as drills, reaming devices, guide tubes, guide pins, or fasteners. In_an_especially preferred_embodiment_of_the invention, the guide means_is slidably mounted on the_handle, and_is provided with means for securing the guide_arm_assembly at selected_positions along the handle.
The preferred embodiment of the present_invention includes additional features, such as_provision of means_for_attaching_nail insertion or extraction_devices which are used, in conjunction_with the instrument of the present_invention, to drive the nail into or_remove the nail from the femur._Provision is made for attachment_of the_nail insertion or extraction tool_in a position_which is_slightly offset, relative_to the longitudinal access of the_nail, to provide_additional working clearance to the surgeon,_if_needed.
Other objects, advantages_and_novel_features of_the present invention_will_become apparent_from_the following detailed description of the_invention,_when considered in conjunction with the accompanying_drawings. 1. Field of_the_Invention
The invention relates to_a motorized pipette which has_an electronic, programmable control. In particular,_the invention_relates to_certain operating modes of such a pipette.
2. Description of Related Art
Motorized_pipettes of the type under consideration_are extensively used in_processes for_pipetting_of relatively small_amounts_of liquid,_and take various forms as shown in_U.S. Pat._No. 5,187,990 A, U.S. Pat. No._6,254,832 B1, U.S. Pat._No._6,090,348 A2 and U.S. Pat. No._6,540,964 B2.
The known motorized pipette is_designed and suited for pipetting_of_relatively_small amounts of liquid (for_example 1 ml per dispensing cycle)_as shown in_U.S. Pat. No. 6,090,348 A. The motorized_pipette_can work in a standard operating_mode_in which a volume of sample_liquid_which_is input beforehand is taken_up and dispensed again, or it_can also be operated as a repetition pipette with_dispensing of a_volume of liquid which has_been_taken_up, in several stages.
There are motorized pipettes with interchangeable pipette_tips which_are slipped onto_a tip receiving section (air cushion pipettes) or with complete_syringes (plunger/cylinder arrangement) which are mounted on_the