Universal prosthesis with cushioned ankle
First Claim
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1. A prosthetic foot for providing a smooth and generally life like response to a wearer, comprising:
- a foot plate comprising a plurality of symmetrically arranged spaced elongated toes;
an ankle plate positioned above said foot plate; and
a compressible block between said foot plate and said ankle plate and in mechanical communication with said foot plate and said ankle plate for transmitting forces imparted thereon by said foot plate and said ankle plate such that there is a smooth and natural rollover between heel-strike and toe-off as energy is cyclically stored and released in said prosthetic foot, said block having exposed sides coated with a sealant.
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Abstract
The invention provides a cushioned ankle prosthetic foot and a cosmesis having a slot between the big toe and adjacent toe to allow the amputee to wear thong sandals and the like. The cushioning desirably provides a smooth and more natural-feeling rollover from a heel-strike to a toe-off position and/or improved dynamic response characteristics. Advantageously, the prosthetic foot is configured so that it can be used as either a right or a left foot. Moreover, the cosmesis includes a toe reinforcement strap to desirably provide improved wear resistance to the cosmesis.
139 Citations
50 Claims
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1. A prosthetic foot for providing a smooth and generally life like response to a wearer, comprising:
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a foot plate comprising a plurality of symmetrically arranged spaced elongated toes;
an ankle plate positioned above said foot plate; and
a compressible block between said foot plate and said ankle plate and in mechanical communication with said foot plate and said ankle plate for transmitting forces imparted thereon by said foot plate and said ankle plate such that there is a smooth and natural rollover between heel-strike and toe-off as energy is cyclically stored and released in said prosthetic foot, said block having exposed sides coated with a sealant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An artificial foot for providing a smooth and natural dynamic response during walking or running activities of a lower limb amputee, comprising:
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a flexible lower foot plate having an upper surface and a lower surface, said foot plate comprising a toe section, an arch section and a heel section, said toe section comprising a plurality of toes spaced by a plurality of slots and a generally concave upward toe end, said arch section comprising a generally concave downward arch, said heel section comprising a generally concave upward heel end;
a flexible upper ankle plate having a top surface and a bottom surface and a length shorter than said foot plate, said bottom surface of said ankle plate being substantially parallel to said upper surface of said foot plate, said ankle plate being connected to an attachment member utilizing a bolt for facilitating attachment to a stump or pylon of the amputee, said bolt hog a longitudinal axis defining an attachment axis generally aligned with the vertical centerline of an imaginary ankle; and
a resilient ankle member composed of a compressible material and sandwiched between said foot plate and said ankle plate, said ankle member comprising an anterior section and a posterior section, said anterior section having a downwardly and outwardly sloping front face, said posterior section having a wedge shaped cut to form a first rear face substantially parallel with said attachment axis and a second rear face inwardly and downwardly inclined with respect to said first rear face. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A prosthetic foot for providing a smooth and generally life-like response to a wearer, comprising:
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a foot plate comprising a plurality of symmetrically arranged spaced elongated toes;
an ankle plate positioned above said foot plate;
a compressible block between said foot plate and said ankle plate and in mechanical communication with said foot plate and said ankle plate for transmitting forces imparted thereon by said foot plate and said ankle plate such that the is a smooth and natural rollover between heel-strike and toe-off as energy is cyclically stored and released in said prosthetic foot; and
an outer cosmesis housing said foot plate, said ankle plate and said block, said cosmesis comprising a toe region with a slot to form a big toe substantially aligned with one of said toes of said foot plate. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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Specification