Prosthetic foot with tunable performance
First Claim
1. A prosthetic foot comprising:
- a longitudinally extending foot keel having forefoot, midfoot and hindfoot portions;
a resilient calf shank secured to the foot keel at a lower end thereof and extending upwardly from the foot keel defining an integrated ankle joint area and the lower prosthetic part of a leg;
wherein the lower end of the calf shank is in the form of a spiral above the hindfoot portion of the foot keel, the calf shank extending substantially vertically upward anteriorly from the spiral to an upstanding upper end thereof.
1 Assignment
0 Petitions
Accused Products
Abstract
A prosthetic foot (70) incorporates a foot keel (71) and a calf shank (72) connected to the foot keel to form an ankle joint area of the prosthetic foot. The foot keel has forefoot and hindfoot portions and an upwardly arched midfoot portion extending between the forefoot and midfoot portions. The calf shank includes a downward convexly curved lower end in the form of a spiral which is adjustably attached at a portion thereof to the foot keel by way of a coupling element. The calf shank extends upward anteriorly from the spiral to an upstanding upper end thereof. The coupling element includes a stop of a predetermined size to limit dorsiflexion of the calf shank in gait. The calf shank creates an integrated ankle and calf shank with the foot keel which has a variable radii response outcome similar to the disclosed parabola shaped calf shank while being readily covered by a cosmetic covering for the foot, ankle and lower leg.
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Citations
23 Claims
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1. A prosthetic foot comprising:
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a longitudinally extending foot keel having forefoot, midfoot and hindfoot portions; a resilient calf shank secured to the foot keel at a lower end thereof and extending upwardly from the foot keel defining an integrated ankle joint area and the lower prosthetic part of a leg; wherein the lower end of the calf shank is in the form of a spiral above the hindfoot portion of the foot keel, the calf shank extending substantially vertically upward anteriorly from the spiral to an upstanding upper end thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A prosthetic foot comprising:
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a longitudinally extending foot keel; a calf shank secured to the foot keel at a lower end thereof and extending upwardly from the foot keel; wherein the lower end of the calf shank is in the form of a spiral, the calf shank extending upwardly anteriorly from the spiral to an upstanding upper end thereof, wherein the calf shank is secured to the foot keel by way of a coupling element;
wherein a radially inner end of the spiral of the calf shank is fastened to the coupling element. - View Dependent Claims (10)
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11. A prosthetic foot comprising:
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a longitudinally extending foot keel; a calf shank secured to the foot keel at a lower end thereof and extending upwardly from the foot keel; wherein the lower end of the calf shank is in the form of a spiral, the calf shank extending upwardly anteriorly from the spiral to an upstanding upper end thereof, wherein the calf shank is secured to the foot keel by way of a coupling element, wherein the coupling element includes a stop to limit dorsiflexion of the upwardly extending calf shank in gait, wherein said stop includes at least one wedge shaped member secured to the coupling element anterior of the calf shank.
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12. A prosthetic foot comprising:
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a longitudinally extending foot keel; a calf shank secured to the foot keel at a lower end thereof and extending upwardly from the foot keel; wherein the lower end of the calf shank is in the form of a spiral, the calf shank extending upwardly anteriorly from the spiral to an upstanding upper end thereof, wherein the foot keel has an upward convexly curved dorsal surface of a midfoot portion of the foot keel facing the spiral lower end of the calf shank, radii of curvature of the spiral and the convexly curved dorsal surface of the foot keel affecting a dynamic response capability and motion outcome of the prosthetic foot in gait.
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13. A prosthetic foot comprising:
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a longitudinally extending, resilient foot keel having a forefoot portion at one end, a hindfoot portion at an opposite end and an upwardly arched midfoot portion extending between the forefoot and hindfoot portions; a coupling element connected to the foot keel; a resilient, upstanding calf shank having a lower end connected to the foot keel by way of the coupling element to form an ankle joint area of the foot, and extending upward to form a resilient lower prosthetic part of a leg to an upper end to connect with a supporting structure on an amputee'"'"'s leg; wherein the lower end of the calf shank is in the form of a spiral above the hindfoot portion of the foot keel, the calf shank extending upwardly anteriorly from the spiral to the upper end thereof. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A calf shank for a prosthetic foot comprising:
an elongated, semi-rigid resilient member having one, lower end in the form of a spiral for attachment to a foot keel to form an ankle joint area of the prosthetic foot, and an opposite, substantially vertically oriented upstanding upper end for connection with a supporting structure on an amputee'"'"'s leg, the member extending substantially vertically upward anteriorly and curvilinearly with a progressively increasing radius of curvature from the spiral at the one, lower end toward said opposite, substantially vertically oriented upstanding upper end to form a resilient lower prosthetic part of a leg above the ankle joint area. - View Dependent Claims (21)
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22. A calf shank comprising:
an elongated, semi-rigid resilient member having one, lower end in the form of a spiral for attachment to a foot keel to form an ankle joint area of the prosthetic foot, and an opposite, upstanding upper end for connection with a supporting structure on an amputee'"'"'s leg, the member extending upward anteriorly and curvilinearly with a progressively increasing radius of curvature from the spiral at the one, lower end towards said opposite, upstanding upper end, wherein a radially inner end of the spiral at said one end of the member includes a fastener for fastening the calf shank to a coupling element for attachment to a foot keel. - View Dependent Claims (23)
Specification