Prosthetic foot with tunable performance
First Claim
Patent Images
1. A prosthetic foot comprising:
- 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 downward, convexly curved and extends upwardly, and initially anteriorly therefrom into a reversely curved portion of the calf shank leading to an upstanding upper end thereof;
wherein the reversely curved portion of the calf shank has a posteriorally facing surface which is provided with a plurality of S-shaped longitudinally extending grooves and fins formed thereon to facilitate resilient compression thereof in response to forces on the calf shank during use of the prosthetic foot.
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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 which is secured to the foot keel by way of a coupling element (73). The lower end of the calf shank extends upwardly, and initially anteriorly therefrom into a reversely curved portion (75) of the calf shank leading to an upstanding upper end thereof.
115 Citations
20 Claims
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1. 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 downward, convexly curved and extends upwardly, and initially anteriorly therefrom into a reversely curved portion of the calf shank leading to an upstanding upper end thereof; wherein the reversely curved portion of the calf shank has a posteriorally facing surface which is provided with a plurality of S-shaped longitudinally extending grooves and fins formed thereon to facilitate resilient compression thereof in response to forces on the calf shank during use of the prosthetic foot. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A prosthetic foot comprising:
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a longitudinally extending 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 upwardly arched midfoot portion of the foot keel by a first releasable fastener, the coupling element extending posteriorly in the longitudinal direction of the foot keel to where the coupling element is spaced above the hindfoot portion of 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 an upper end to connect with a supporting structure on an amputee'"'"'s leg, the lower end of the calf shank being connected to the coupling element by a second releasable fastener spaced posteriorly in the longitudinal direction of the foot keel from the first releasable fastener for increasing the active length and dynamic response capability of the calf shank; wherein the lower end of the calf shank is downward, convexly curved and extends upwardly, and initially anteriorly therefrom into a reversely curved portion of the calf shank leading to the upper end thereof. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A prosthetic foot comprising:
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a longitudinally extending foot keel; 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 an upper end to connect with a supporting structure on an amputee'"'"'s leg; wherein the lower end of the calf shank is downward, convexly curved and extends upwardly, and initially anteriorly therefrom into a reversely curved portion of the calf shank leading to the upper end thereof; wherein the reversely curved portion of the calf shank has a posteriorly facing surface which is provided with a plurality of S-shaped longitudinally extending grooves and fins formed thereon to facilitate resilient compression of the calf shank while resisting expansion thereof in response to forces on the calf shank during use of the prosthetic foot.
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17. A calf shank for a prosthetic foot comprising:
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an elongated, semi-rigid resilient member having an outward convexly curved portion at one end of said member for attachment to a foot keel to form an ankle area of the prosthetic foot, an opposite end of said member to connect with a supporting structure on an amputee'"'"'s leg, and wherein said convexly curved portion at said one end of said member extends from the one end and into a reversely curved portion of the calf shank leading to the opposite end; wherein the reversely curved portion of the calf shank has a conversely curved face with a plurality of S-shaped longitudinally extending grooves and fins formed thereon to facilitate resilient compression of the calf shank while resisting expansion thereof in response to forces on the calf shank during use of the calf shank in a prosthetic foot. - View Dependent Claims (18, 19, 20)
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Specification