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Publication numberUS817340 A
Publication typeGrant
Publication dateApr 10, 1906
Filing dateMar 1, 1905
Priority dateMar 1, 1905
Publication numberUS 817340 A, US 817340A, US-A-817340, US817340 A, US817340A
InventorsRudolf Rosenkranz
Original AssigneeRudolf Rosenkranz
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Artificial limb.
US 817340 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

PATENTBD APR. 10, 1906.

4N T A N E V m M m 0V m NI 3 A M m AB IH BOP SIN 0P0 M, MM m P P A To all whom it concern.-

Be it known that I, RUnoLF.RsENxRA1vZ,

UNITED STATES Parana? ()FFICE.

, RU-DoLr RosENKnANz; or rn'rssuse, PENNSYLVANIA. ARTIFICIAL LINIB.

a citizen of the" United States, residing at Pittsburg, in the State of Pennsylvania, have inyented certain new and useful Im rovements in Artificial Limbs, of which t 'e following is a specification.

; My invention relates to artificial legs and Especially to the joint connecting the leg and the foot. The objects of the invention are,

l to provide a superior universal joint between the: main part of the artificial leg and its lower extremity; to provide a joint which will closely simulate in action the natural joint. of theankl; toavoid jar upon the-stump when the limb is brou 'ht in contact with the awing wherein-+- .5

j as

ground an'd to simp ify and to strengthen and generally im rove the construction of artificial limbs. hese objects and other advantages which will hereinafter ap ear, I attain by-nieans of, the construction 1 lustrated in preferred forms in the accompanying Figure 1 is'a central vertical section through anartificial leg and foot having my improve ment -Fi es 2 jand 3 are-respectively, a central longliltu alsection, and a plan view, of the cus 'onmeinber of. the joint showing an alternate construction of the cushion, and i Figure is a central section of-amodified form of the limb for use when the footmhst be directly joined to the lower end of the':ar

tificial leg. I

Primarily I-avoid the use of hinges and sliding partsin the joint by providing a cushs the intermediate resistance of t e cushion block 9 which is preferably made of rubber. The bolt 7 extends through thiscushion block 7 and has a spherical head which works in a vide socket formed by two semi-spherical plates 11 and 11" both of which are screwed to the foot ortion 5.. In the socket may be proif some pockets of gra hite 12, or other lubricatingmaterial, and t e rubber cushion 9 is maintained in position by means of Dins Specification of Letters Patent.- 1 Application filed March 1, 1905. Serial l'o. 247.856;

Patented April 10,1900.

' '13 fixed in. the flat faces of 'the twowooden portions5'and'6l v The cushion block 9 has at its forward side a rtion 9" which is of denser structure of ru ber so as to provide greater resistance when'the pressure comes u on this portion by the tilting forward-of t e-leg portion 6 with respect to the foot portion 5, so that as the 'tilting proceeds the resistance becomes greater and greater in order to simulate the natural action .of the foot as much as ossible and make the joint most resilient at the rear. The? bolt 7' ordinarily is not required to move at-all since the cushion-block 9 allows for all variations of distance betweenthe surfaces of the leg portion and the foot portion, the leg moving about the ball 10 as a center. The 'bolt 7' may be kept tightand noise avoided by use of a rubber washer 14"plaoedunderthe lock nutat the top as shown.

In Figures 2and 3 is shown an alternate construction ,of the'cushion block 9 in which Y 'the eater iesistance'necessaryin the forwar portion is provided by an inserted block'l5 of harder rubber than the remainder of the'liod'y,having the same effect-as the denser portion 9"in.. the first form described.

In Figure 4 'isshown amodification .of the devices adaptedtotheus'e ofishchllimbs de-.

ed to accommodate-l cut ofi at theans'i I '85 k e, or just above1,'inwhic' case there is not much room in the le g'portion to fix the bolt 7 audit is therefore inverted andthe socket is placed on the uppe'i' side of the cushion block 9. As shown, the leg art22 has at the bottom a plate19 throng hich pass some riv- 'ets20,holdin the t .0 lates 17 and 18 which areuse to form t esocket for the head ofthe bolt. In this case also thebolt 7 is secured -by a lock nut andjunderneath it I there is a cushion of rubber 21in the portion 5, as in the first instance;

It will be seen th by this construction the footportion has a universal joint with.

the leg portion so that it maytilt laterally, and 'move forward and back, and in either 'motionit is resisted by the resiliency 'of the rubber, block 9; also that in the ordin' tilting motion of the leg in walking, the b ock 9 providesa heavier resistance on the front than on the back and this resistance will increaseiigigreater ratio by reason of the denser structure of the rubber between the two forward surfaces of the leg ortion 6 and the 'foot 5. Since thebolt 7' oes not have any no slidie motion in its sheath it is not required to be fubrieated and is entirely out of contact with any portion which mi ht make noise, being surrounded by a leat icr tube 8 and resting on the rubber washer, which also; maintains a snw fit of the hall lO'iu its; socket 12. It will be seen also that there are no parts which catigct out of order as the 1 parts are all held in proper position by the 1 weight upon the limb, and there are no movi ing parts except the revolution of the ball 10 l in its socket and this cannot make any noise I and requires only the lubrication that can be 3 sn )plied by the graphite inserts therein. It will also be seen that the parts are readily assembled or can be taken apart or can be easily interchanged, and the resistance of tlte joint to bending can bc t'efltltttttl by varying the amount of the dense portion of the rubber. in any motion of the foot the entire effect of weight of the leg-is met with a resilient cushion and all jarring is ptvoided. Other advantage of the structure will readily occur to those familiar with the'art.

Having thus described my invention and illustrated its use,.what l claitn as new, and desire to secure by Letters Patent, is the following:

1. An artificial limb comprising a leg portion and a foot portion and an intermediate rubber portion continuous in outer contour with the other two said portions and entirelv separating them, and a universal ball-andsocket joint connecting the two solid portions by parts passing through the rubber portion, substantiallv as descrtbed..

2. ln an artificial leg the combination with a leg port ion and a foot portion, and connecting means to hold them together each portion having a flat joint surface, of a rubber cushion between said portions 'ext-entlin" over the entire area of said flat surfaces am fixed in the leg portion, extending throughthe said rubber portion, a ball on the same and an engagin socket on the foot portion, said rubber cushion having the forward end made of denser rubber than the rest, to afford greater resistance to compression, substantially as described.

4. An artificial leg having ale g portion and a foot portion of solid material, an inter-- vening block of rubber entirelv covering the surfaces of said portions and being continuous with the other parts in'outline, whereby. there is no moving joint. between the footand leg portion, and a non-metallic sheath and a rod therein having a head making a universal joint between the foot and leg pprtions allow tng free compression of said ru ber pad, subst a ntially as described. I I

5. In an'artifieial limb a cushion for spacing at )art the foot and leg portions composed of soft rubber which has an integral forward part of it made more dense than the restto afford reater resistance at the forward side of the foot, substantially as described.

In testimony whereof I have hereunto. signed my name in the presence of the two subscribed witnesses. I

R UDOLF ROSENKRANZ'.

Witnesses:

Aaeuwoa'rn MARTIN.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4360931 *Apr 15, 1981Nov 30, 1982Hampton Ralph CProsthetic ankle
US4938776 *May 12, 1989Jul 3, 1990Masinter Robert AIntegrated ankle and foot prosthetic system
US5037443 *May 27, 1987Aug 6, 1991Otto Bock Orthopaedische Industrie Besitz - Und Verwaltungs - Kommanditgesellschaft IndustriestrasseArtificial jointless foot
US5181932 *Apr 13, 1989Jan 26, 1993Phillips L VanFoot prosthesis having auxiliary ankle construction
US5443522 *Mar 26, 1993Aug 22, 1995Otto Bock Orthopaedische Industrie Besitz und Verwaltungs-Kommanditgesell schaftArtificial foot having a low-positioned joint and a horizontal plantar buffer
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
US5549714 *Jan 12, 1995Aug 27, 1996Phillips; Van L.Symes foot 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
US5728177 *Aug 5, 1996Mar 17, 1998Flex-Foot, Inc.Prosthesis with foam block ankle
US5766265 *Jun 7, 1995Jun 16, 1998Phillips; Van L.Prosthetic foot having curved integral support
US5800569 *Aug 15, 1995Sep 1, 1998Phillips; Van L.Prosthesis with resilient ankle block
US5899944 *Apr 23, 1996May 4, 1999Phillips; Van L.Prosthetic foot incorporating compressible members
US5976191 *Oct 8, 1996Nov 2, 1999Phillips; Van L.Foot prosthesis having curved forefoot
US5993488 *May 13, 1998Nov 30, 1999Phillips; Van L.Prosthesis with resilient ankle block
US6019795 *Jun 15, 1998Feb 1, 2000Phillips; Van L.Curved prosthesis
US6206934Aug 21, 1998Mar 27, 2001Flex-Foot, Inc.Ankle block with spring inserts
US6406500Nov 2, 1999Jun 18, 2002Van L. PhillipsFoot prosthesis having curved forefoot
US6478826Apr 9, 1999Nov 12, 2002Van L. PhillipsShock module prosthesis
US6511512Apr 24, 2000Jan 28, 2003Ossur HfActive shock module prosthesis
US6887279Jan 28, 2003May 3, 2005össur hfActive shock module prosthesis
US6899737Oct 26, 2000May 31, 2005Van L. PhillipsFoot prosthesis having cushioned ankle
US6969408Sep 30, 2003Nov 29, 2005Ossur Engineering, Inc.Low profile active shock module prosthesis
US7063727Dec 17, 2002Jun 20, 2006Van L. PhillipsFoot prosthesis having cushioned ankle
US7169190May 2, 2005Jan 30, 2007Van L. PhillipsActive shock module prosthesis
US7279011Feb 11, 2004Oct 9, 2007Phillips Van LFoot prosthesis having cushioned ankle
US7347877Sep 17, 2004Mar 25, 2008össur hfFoot prosthesis with resilient multi-axial ankle
US7354456Sep 14, 2004Apr 8, 2008Phillips Van LFoot prosthesis having cushioned ankle
US7371262Sep 2, 2005May 13, 2008össur hfLow profile active shock module prosthesis
US7581454Sep 20, 2004Sep 1, 2009össur hfMethod of measuring the performance of a prosthetic foot
US7846213Nov 12, 2004Dec 7, 2010össur hf.Foot prosthesis with resilient multi-axial ankle
US7879110Dec 1, 2009Feb 1, 2011Ossur HfFoot prosthesis having cushioned ankle
US7891258Aug 7, 2009Feb 22, 2011össur hfMethod of measuring the performance of a prosthetic foot
US7998221Jul 24, 2009Aug 16, 2011össur hfFoot prosthesis with resilient multi-axial ankle
US8007544Aug 15, 2003Aug 30, 2011Ossur HfLow profile prosthetic foot
US8025699Jul 24, 2009Sep 27, 2011össur hfFoot prosthesis with resilient multi-axial ankle
US8377144Sep 29, 2006Feb 19, 2013Ossur HfLow profile prosthetic foot
US8377146Jul 18, 2011Feb 19, 2013Ossur HfLow profile prosthetic foot
US8486156Feb 24, 2011Jul 16, 2013össur hfProsthetic foot with a curved split
US8858649Dec 17, 2012Oct 14, 2014össur hfLow profile prosthetic foot
US8961618Dec 21, 2012Feb 24, 2015össur hfProsthetic foot with resilient heel
Classifications
International ClassificationA61F2/60, A61F2/00, A61F2/50, A61F2/66
Cooperative ClassificationA61F2220/0041, A61F2220/0025, A61F2/60, A61F2/6607, A61F2002/30509, A61F2002/5003, A61F2002/5009, A61F2002/30438, A61F2002/30512, A61F2002/5096
European ClassificationA61F2/66A, A61F2/60