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Publication numberUS25238 A
Publication typeGrant
Publication dateAug 30, 1859
Publication numberUS 25238 A, US 25238A, US-A-25238, US25238 A, US25238A
InventorsDouglas Ely
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Artificial leg
US 25238 A
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Description  (OCR text may contain errors)

. PIATENTED AUG. '30-, 1859. 1). BLY.


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Specification of Letters Patent No. 25,238, dated August 30, 18159:

T 0 all whom it may concern:

Be it known that I, DOUGLAS BLY, of the city of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Artificial Legs, of which the following is a full and accurate description, reference being had to the accompanying drawings, making part of this specification, and to the letters of reference marked thereon.

Of said drawings Figure 1 is a sectional elevation of my improved leg and Fig. 2 is a side elevation of the same.

The nature of this invention will be best understood from a description of its construction and use.-

In the drawing, Fig. 1, A is the leg, B a segment. of india-rubber or other elastic material attached to the foot or tarsus F by means of cement and C is the cord which binds the whole together.

The lower end of the leg being a plane surface has two dowelpins (a? (Z) which prevent it from turning around and the cord C forms the center of motion, its length remaining the same at all times. The construction of this leg allows of fiexion in all directions. For when a greater pressure is exerted on one side than the other the rubber on that side is compressed and the foot readily flexes on the leg. It is also obvious that the rubber will so far yield as to remove all shock or jar consequent upon the .foot coming suddenly in contact With the ground while atthe same time the contraction thus produced will not be sufiicient materially to affect the proper length of the limb.

The advantages of this construction of leg are that there are no rubbing surfaces giving rise to friction and noise, while the whole works so equably and smoothly and so deadens every shock as to prove extremely comfortable to the wearer. The lightness also of the limb is proportionally very great, there being little or no machinery and no heavy metallic parts.

Having thus described my invention what I claim therein as new and desire to secure by Letters Patent is 1. The combination of the segment of rubber B or its equivalent with the foot F and leg A in themanner and for the purpose substantially as described.

2. I claim connecting the foot to the leg by means of the cord C or its equivalent thereby dispensing with all joints, bolts, hinges, and metal straps and the friction and noise to which they give rise.





Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2594945 *Apr 27, 1949Apr 29, 1952Fred C LucasAnkle joint for artificial legs
US4360931 *Apr 15, 1981Nov 30, 1982Hampton Ralph CProsthetic ankle
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
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
US6280479Apr 9, 1999Aug 28, 2001Flex-Foot, Inc.Foot prosthesis having cushioned ankle
US6899737Oct 26, 2000May 31, 2005Van L. PhillipsFoot prosthesis having cushioned ankle
US7063727Dec 17, 2002Jun 20, 2006Van L. PhillipsFoot prosthesis having cushioned ankle
US7279011Feb 11, 2004Oct 9, 2007Phillips Van LFoot prosthesis having cushioned ankle
US7354456Sep 14, 2004Apr 8, 2008Phillips Van LFoot prosthesis having cushioned ankle
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
Cooperative ClassificationA61F2/6607