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Publication numberUS2453969 A
Publication typeGrant
Publication dateNov 16, 1948
Filing dateApr 3, 1947
Priority dateApr 3, 1947
Publication numberUS 2453969 A, US 2453969A, US-A-2453969, US2453969 A, US2453969A
InventorsCarter Edwin C
Original AssigneeCarter Edwin C
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Artificial limb
US 2453969 A
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Description  (OCR text may contain errors)

Nov. 16, 1948. E. c. CARTER 2,453,969

ARTIFICIAL LIMB 2 Sheets-Sheet 1 Filed April 3. 1947 .8 9 I r l I Inventor 6 25 Edwin C. Carfer Attqys Nov. 16, 1948. E. c. CARTER ARTIFICIAL LIMB Filed April 5, 1947 2 Sheets-Sheet 2 Inventor Edwin 0. Carter W L i Patented Nov. 16, 1948 UNHTED STATES PATENT OFFICE ARTIFICIAL LIMB Edwin 0. Carter, Rio Grande City, Tex. Application April 3, 1947, Serial No. 739,109

8 Claims.

This invention relates to improvements in artificial limbs.

An object of the invention is to provide an improved artificial limb including a leg supporting calf portion and a foot portion connected together by means of a series of transversely extending spring elements having their opposite ends secured together as separate integral units and attached to said calf portion and foot portion.

Another object of the invention is to provide an improved artificial limb including a hollow leg supporting calf portion and a foot portion connected therewith by means of a series of laterally disposed double coil springs whose protruding ends are welded together at their outermost extremities and are secured to said calf portion and foot portion by means of end encir cling clamping plates and clamping bolts extending therethrough.

A further object of the invention is to provide an improved artificial limb including a hollow leg supporting calf portion and a foot portion connected therewith by means of a series of similarly formed substantially U-shaped bowed springs which extend on a common transverse plane with their opposite extremities welded together and secured to said calf portion and said foot portion by means of encircling clamping plates and assoiated clamping bolts, whereby a flexible and resilient connection will be provided between said calf portion and said foot portion to permit relative forward and backward angular movement between said portions when in use.

Another object of the invention is to provide an improved artificial limb including a hollow leg supporting calf portion and a foot portion connected therewith, with alternately arranged double coil springs having their intermediate connecting portions angled in opposite directions and with their protruding terminal ends welded together and secured to said calf portion and said foot portion, together with means for limiting or snubbing the forward and rearward angular movement between said calf portion and foot portion while walking.

A still further object of the invention is to provide an improved artificial limb which will be highly efficient in operation, and relatively inexpensive to manufacture and produce.

Other objects will appear as the description proceeds.

In the accompanying drawings which form a part of this application,

Figure l is a side elevation, of the artificial limb showing partly in section the use of double coil springs connected between the calf and foot portions;

Figure 2 is a sectional view taken on the line 2--2 of Figure 1;

Figure 3 is a sectional view taken on the line 33 of Figure 1;

Figure 4 is a vertical sectional view taken through the artificial limb showing the use of a series of bowed substantially U-shaped springs connected between the calf portion and the foot portion of the limb;

Figure 5 is a sectional view taken on the line 5-5 of Figure 4, and

Figure 6 is a side elevation of the limb shown in Figure 4, the same being partly broken away and in section to show a slight modification in the spring connection with the foot portion.

Like characters of reference are used throughout the following specification and the accompanying drawings to designate corresponding parts.

In carrying out the invention, there is provided an improved form of artificial limb including a hollow calf portion I having a pillar block 2 in the lower end thereof, and a metallic shell 3 disposed therebelow, being open at its forward end and housing a series of rubber cushioning members 4 with their forward ends being stepped and adapted to be engaged by the coils 5 of the double coil springs 5 and B connected between said calf portion and the foot portion when said limb is used in walking. v

An inverted U-shaped clamping plate 1 is disposed below the shell 3, and cooperates with the U-shaped clamping plate 8 to support and clamp the upper terminal ends 9 of said double coil springs 5 and 6, hich are welded together at it to provide an integral unit. I A rearwardly extending snubber plate H is disposed below the clampin'gplate 8 and has its terminal end extended outwardly to provide a snubber finger I2. I v

The elongated bolts l3 and M will extend through the upper washer l5 and through the vertical apertures It in the filler block 2 and through the shell 3 and rubber cushioning members 4, and finally through the clamping plates 1 and 8 and the snubber plate ll, being secured in the desired adjustment by means of the nuts l1.

The lower series of coils 6 of the double coil springs will have 'rearwardly and horizontally extending protruding ends l8, whose tips will be welded together at l 9, being held in place between the inverted U-shaped clamping plate 20 and the U-shaped clamping plate 2| supported upon the sole plate 22 of the foot portion 23 of the limb by means of the bolts 24 and the cooperating nuts 25.

The sole plate 22 is shaped to the approximate shape of the bottom of a foot, and has an arcuate or U-shaped upwardly extending heel plate 26 attached to its rear end by means of the bolt 2'! and nut 28, the upper end of said heel plate 26 being bent forwardly and downwardly to, form a snubber keeper 29 which will overlie the snubber finger l2 for limiting the forward and rearward rocking movement between the calf portion and e the foot portion of the artificial limb.

The convolutions of the coil springs and 6 will be arranged in staggered relation, with-the portions connecting said spring-s5 and 6 extendin alternately to the right and to the left, whereby a slight sidewise movement between saidcalf. portion and said foot portion will be permitted when-walking.

The form of the artificial limb shown, in Figmics .4; 5 andnfi comprisesahollow calf portion 3! having a filler block 32 in its lower end, said block being formed with the spaced vertical; bore 33.

A washer 34 will be disposed upon the upper sunfiace 01% the block 32:, and. thepair of bolts 35 will extend therethrough and hr i boresfim;

A. pairofi; upper and lower parallel clam-pine plates 36 and 37 having downwardly bent forwardwmds; willbe supported-upon the bolts 3 being secured by the nuts 38;; and EhohQriZ-ontaI unrer ndssboi the bowed substantial y- U-shaped springs. .5. will be clamped therebetween. The re rtips of said ends 39 willbe welded together as at M} to providean integral unit,

A hollowioot-momberflwillbe formed with a ongitu inally xtending channel. '43 in its upner snriace hav n opposi el d p s d vertical s d walls 44, and a downwardly angled bottom 45 whose forwardendlfi is; angled steeper than said portion 45., and terminat sat th openns; 4 formed through the bottom ofthe foot member' Q24. The bottom or lower ends moi the springs 40 W'H'I" have their; rear extremities clamped between the angled bottom 45, and'thefiat clamping late 41!; andsecured; by 'means of the boltor-bolts 50 and nut ornate-5|: disposed through. thepioot member 42; and a hose or heel plate Won-the lower rear end thereof.

An upwardly extend-ingva-rcuate or- -U-.-shaped heel plate 5% willbe secured by the bolt 5|}, and will terminate in the forwar y and down ly extended-snubber keeper 5. to be engaged by the rearward andupwardly extending rubber-finger 55 formed on the end; of." Said clam-pingplate 55'.

' Eromtbe f regoing description, it. will be seen that. whenthe-limb is in use, the springs 40 will be flexed-downwardly -to engage the angled bottom 46 of the foot member 42. The'oppositeside walls- 44 or, the cl'ia-nnel 43.:and therfoot: member lZ-Wiill permit, of aelimitedlateral movement in the calf portion and the-footportion of the limb while, walking, and theisnubber finger 55 and the cooperating; snubber beeper 5.4 willlimit the front and back rocking motion. between said pfififi i.

It will be seen that there has been devised and provided a; hi hly eflieient formoof, artificial limb whichtwilli be relativelyinexpensive to. manufactureiandaproduce While theorefenred embodiment of the instant inventionhas, b enrillu trotedand: escribe t will be understood that it is not intended to limit the scope of the invention thereto, as minor changes in detail of construction may be resorted to without departure from the spirit of the invention.

Having thus described my invention what I claim as new and desire to secure by Letters Patent of the United States is:

1. An artificial limb comprising a hollow leg supportingcalf portion and a foot portion associated therewith, a series of substantially U-shaped laterally disposed springs having rearwardly protruding ends detachably connected between said calf portion and said foot portion, and snubber means for limiting the relative move- 'ment between said portions.

2. An artificial limb comprising a hollow leg supporting calf portion and a foot portion associated therewith, a series of substantially U-shaped laterally disposed springs having rearwardly protruding ends; detachably connected between said calf portion and said foot portion, a snubber keeper on said foot portion, and a cooperating snubber linger on said calf portion adapted. to, limitthe forward and backward motion between said parts.

3. artificial limb comprising a hollow leg sup-porting calf portion and a foot portion associated therewith, a series of substantially Ueshaped laterally disposed springs having rearwardl-y protrudingends detachably connected be,- tweensaid calfportion and said foot portion, snubber means for limitingv the relative movement between; said portions, and cushioning means between said calfi portion and the interconnected vLl-sljiaped laterally disposed springs.

4. An artificial limb comprising a hollow leg supporting calf portion and a foot portion associated therewith, a series of substantially e haped; laterally disposedsprings having-rearwa-rdl-y protruding ends; detachably connected between said calf portion and said foot portion, and movement limiting means disposed at the front and rear of said calf portion.

5.. An artificial, limb. comprising a hollow leg supporting calf portion and a foot portion associated" therewith, a series of substantially u-shaped laterally disposed springs having rearwardly protrudingends detachably connected between said calf portion and said foot portion, rigid snubber means at the rear of said calf portion between the, same and said foot portion, and cushioning means at the front of said calf portion for engagement with said springs for cushioning and limiting the movement between said calf portion and said foot portion.

6. An artificial limb comprising a hollow leg supporting calf portion and a foot portion associated therewith, a series of substantially u-shaped laterally disposed springs having rearwarclly protruding ends detachably connected between said cal-f portion and said foot portion, the opposite ends of said springs being welded together asunits, andclamping means for attaching the same respectively to said calf portion and said foot DOIWQH. I 7. An artificial limb, comprising a hollow leg supporting calf portion, and a foot portion associated therewith, a series of substantially ll-shaped laterally disposed springs having rearwardly protruding ends welded together to form. units, andcooperating interengaging U-shaped clamping plates disposed-about. the, opposite ends of said springs, and secured respectively to. said ,cdi p tl a and t -said mot ortion,

8. An artificial limb comprising a hollow leg supporting calf portion and a hollow foot portion associated therewith, a series of substantially U-shaped double coil springs having rearwardly protruding ends welded together to form units, clamping plates secured to the terminal ends of said springs for securing the same respectively to the calf portion and to the foot portion, snubber means interposed between said calf portion and foot portion, and means engageable by said springs for limiting the forward and backward movement of said foot portion with respect to said calf portion.

EDWIN C. CARTER.

The following references are REFERENCES CITED file of this patent:

UNITED STATES PATENTS Number of record in the Name Date Palmer Feb. 20, 1849 Wilcox Aug. 24, 1858

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US6122 *Feb 20, 1849 Artificial
US21289 *Aug 24, 1858 Attachment to abtiitcial legs
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2556525 *Oct 8, 1949Jun 12, 1951Drennon William MArtificial limb joint
US4328594 *Feb 13, 1980May 11, 1982Campbell John WProsthetic foot
US5258039 *Nov 15, 1991Nov 2, 1993The National University Of SingaporeEnergy storing composite prosthetic foot
US5314499 *Apr 4, 1991May 24, 1994Collier Jr Milo SArtificial limb including a shin, ankle and foot
US5376140 *Sep 21, 1992Dec 27, 1994Ryan; Michael W.Prosthetic foot
US5443528 *Nov 17, 1992Aug 22, 1995Allen; ScottCoil spring prosthetic foot
US5458656 *Dec 20, 1993Oct 17, 1995Flex-FootEnergy-storing prosthesis leg pylon vertical shock leg
US5486209 *Jul 1, 1994Jan 23, 1996Phillips; Van L.Foot prosthesis having auxiliary ankle construction
US5509938 *Jan 4, 1994Apr 23, 1996Phillips; Van L.Prosthetic foot incorporating adjustable bladder
US5514185 *Jan 21, 1994May 7, 1996Phillips; Van L.Split foot prosthesis
US5514186 *Mar 8, 1994May 7, 1996Phillips; Van L.Attachment construction for prosthesis
US5545234 *Nov 1, 1994Aug 13, 1996Collier, Jr.; Milo S.Lower extremity prosthetic device
US5549714 *Jan 12, 1995Aug 27, 1996Phillips; Van L.Symes foot prosthesis
US5571213 *Aug 19, 1994Nov 5, 1996Allen; ScottProsthetic foot
US5593455 *May 27, 1994Jan 14, 1997Phillips; Van L.Plug mounted prosthesis
US5593457 *Sep 22, 1995Jan 14, 1997Phillips; Van L.Foot prosthesis having auxiliary ankle construction
US5728176 *Oct 30, 1995Mar 17, 1998Flex-Foot, Inc.Attachment construction for prosthesis
US5746773 *Mar 13, 1996May 5, 1998United States Manufacturing CompanyC-shaped spring member for prosthetic limbs
US5766265 *Jun 7, 1995Jun 16, 1998Phillips; Van L.Prosthetic foot having curved integral support
US5776205 *Jan 24, 1997Jul 7, 1998Phillips; Van L.Split foot prosthesis
US5800568 *Feb 16, 1996Sep 1, 1998Model & Instrument Development CorporationProsthetic ankle and walking system
US5888238 *Dec 20, 1996Mar 30, 1999Phillips; Van L.Plug mounted prosthesis
US5897594 *Mar 4, 1997Apr 27, 1999Otto Bock Orthopaedische Industrie Besitz-UndJointless artificial foot
US5944760 *Aug 4, 1997Aug 31, 1999Roland J. Christensen Family Limited PartnershipProsthetic foot with reinforcing member
US5976191 *Oct 8, 1996Nov 2, 1999Phillips; Van L.Foot prosthesis having curved forefoot
US6071313 *May 22, 1998Jun 6, 2000Phillips; Van L.Split foot prosthesis
US6241776Jul 7, 1999Jun 5, 2001Roland ChristensenProsthetic foot with reinforcing member
US6406500Nov 2, 1999Jun 18, 2002Van L. PhillipsFoot prosthesis having curved forefoot
US6443995Dec 22, 2000Sep 3, 2002Barry W. TownsendProsthetic foot
US6527811Dec 16, 1997Mar 4, 2003Van L. PhillipsFoot prosthesis with modular foot plate
US6663673May 3, 2002Dec 16, 2003Roland J. ChristensenProsthetic foot with energy transfer medium including variable viscosity fluid
US6743260Jul 31, 2001Jun 1, 2004Barry W. TownsendProsthetic foot
US6805717Oct 8, 2002Oct 19, 2004Roland J. Christensen, As Operating Manager Of Rjc Development, Lc, General Manager Of The Roland J. Christensen Family Limited PartnershipEnergy-storing prosthetic foot with elongated forefoot
US6875241Feb 5, 2003Apr 5, 2005Roland J. Christensen, As Operating Manager Of Rjc Development Lc, General Partner Of The Roland J. Christensen Family Limited PartnershipVariable resistance cell
US6875242Dec 16, 2003Apr 5, 2005Roland J. Christensen, As Operating Manager Of Rjc Development, Lc, General Partner Of The Roland J. Christensen Family Limited PartnershipProsthetic foot with energy transfer medium including variable viscosity fluid
US6911052Oct 8, 2002Jun 28, 2005Roland J. Christensen, As Operating Manager Of Rjc Development, Lc, General Partner Of The Roland J. Christensen Family Limited PartnershipProsthetic foot with oblique attachment
US6929665Oct 8, 2002Aug 16, 2005Roland J. ChristensenProsthetic foot with a resilient ankle
US6936074Mar 2, 2004Aug 30, 2005Barry W. TownsendProsthetic foot
US6966933Oct 21, 2003Nov 22, 2005Roland J. Christensen, As Operating Manager Of Rjc Development, Lc, General Partner Of The Roland J. Christensen Family Limited PartnershipProsthetic foot with an adjustable ankle and method
US7060104Apr 9, 2003Jun 13, 2006Phillips Van LEnergy storing foot prosthesis with improved plantar flexion
US7108723Jun 10, 2004Sep 19, 2006Townsend Barry WProsthetic foot
US7172630Feb 20, 2004Feb 6, 2007Roland J. Christensen, As Operating Manager Of Rjc Development, Lc, General Partner Of The Roland J. Christensen Family Limited PartnershipProsthetic foot with cam
US7226485Oct 4, 2002Jun 5, 2007Bioquest Prosthetics, LlcProsthetic foot with tunable performance
US7341603Apr 4, 2005Mar 11, 2008Applied Composite Technology, Inc.Prosthetic foot with energy transfer including variable orifice
US7364593Apr 8, 2003Apr 29, 2008Bioquest Prosthetics LlcProsthetic foot with tunable performance
US7374578Sep 26, 2002May 20, 2008Bioquest Prosthetics, LlcProsthetic foot with tunable performance
US7410503Apr 1, 2004Aug 12, 2008Bioquest Prosthetics LlcProsthetic foot with tunable performance
US7419509Sep 8, 2004Sep 2, 2008Freedom Innovations, LlcProsthetic foot with a resilient ankle
US7429272Mar 29, 2002Sep 30, 2008Bioquest Prosthetics LlcProsthetic foot with tunable performance
US7462201Oct 20, 2004Dec 9, 2008Freedom Innovations, LlcProsthetic foot with an adjustable ankle and method
US7507259 *Mar 29, 2002Mar 24, 2009Bioquest Prosthetics, LlcProsthetic foot with tunable performance
US7520904Oct 19, 2005Apr 21, 2009Freedom Innovations, LlcProsthetic foot with an adjustable ankle and method
US7572299Mar 15, 2006Aug 11, 2009Freedom Innovations, LlcProsthetic foot with energy transfer
US7578852Mar 31, 2003Aug 25, 2009Bioquest Prosthetics, LlcProsthetic foot with tunable performance and improved vertical load/shock absorption
US7611543Apr 1, 2004Nov 3, 2009Bioquest Prosthetics, LlcProsthetic foot with tunable performance
US7618464Aug 3, 2006Nov 17, 2009Freedom Innovations, LlcProsthetic foot with variable medial/lateral stiffness
US7686848Jan 4, 2008Mar 30, 2010Freedom Innovations, LlcProsthetic foot with energy transfer
US7708784Mar 28, 2008May 4, 2010Bioquest Prosthetics, LlcProsthetic foot with tunable performance
US7727285Jan 22, 2008Jun 1, 2010Freedom Innovations, LlcProsthetic foot with variable medial/lateral stiffness
US7735501Aug 11, 2004Jun 15, 2010Bioquest Prosthetics LlcMobility assistance apparatus and method
US7794506Sep 16, 2008Sep 14, 2010Freedom Innovations, LlcMulti-axial prosthetic ankle
US7824446Dec 5, 2007Nov 2, 2010Freedom Innovations, LlcProsthetic foot with longer upper forefoot and shorter lower forefoot
US7954502Dec 22, 2006Jun 7, 2011Bioquest Prosthetics, LlcMobility assistance apparatus
US7955399Apr 1, 2005Jun 7, 2011Bioquest Prosthetics, LlcProsthetic foot with tunable performance
US8034121Apr 17, 2009Oct 11, 2011Freedom Innovations, LlcProsthetic foot with two leaf-springs joined at heel and toe
US8070829Apr 1, 2005Dec 6, 2011Bioquest Prosthetics LlcProsthetic foot with tunable performance
US8236062Apr 1, 2005Aug 7, 2012Bioquest Prosthetics LlcProsthetic foot with tunable performance
US8500825Jun 29, 2010Aug 6, 2013Freedom Innovations, LlcProsthetic foot with floating forefoot keel
US8574314Sep 21, 2010Nov 5, 2013Bioquest Prosthetics LlcResilient prosthetic and orthotic components which incorporate a plurality of sagittally oriented struts
US8808395Aug 21, 2013Aug 19, 2014Bioquest Prosthetics, LLC.Resilient prosthetic and orthotic components which incorporate a plurality of sagittally oriented struts
DE4038063A1 *Nov 29, 1990Jun 4, 1992Bock Orthopaed IndGelenkloser prothesenfuss
EP0487852A1 *Sep 20, 1991Jun 3, 1992Otto Bock Orthopädische Industrie Besitz- und Verwaltungs-KommanditgesellschaftJointless prosthetic foot
Classifications
U.S. Classification623/52, 623/53
International ClassificationA61F2/50, A61F2/60, A61F2/66
Cooperative ClassificationA61F2002/5073, A61F2/66
European ClassificationA61F2/66