Prosthetic foot with tunable performance
First Claim
Patent Images
1. A prosthetic foot comprising:
- a continuously longitudinally extending foot keel having longitudinally aligned forefoot, raised midfoot, and hindfoot portions;
a resilient, monolithically formed shank extending upwardly from the raised midfoot portion of the foot keel, by way of an anterior facing continuous convexly curved surface which extends over at least most of the length of the shank and has increasing radius of curvature defining an ankle joint area and a curvilinear prosthetic part of a leg extending substantially upward above human ankle joint height and the ankle joint area, the shank having a proximal portion for connection with a lower extremity prosthetic structure adapted to be secured to a person'"'"'s residual limb;
wherein the ankle joint area and the prosthetic part of a leg formed by the shank are anterior facing convexly curved and provide means for sagital, anterior dorsiflexion and, posterior plantarflexion motion capabilities in response to a ground reaction force created in a person'"'"'s gait in the prosthetic foot;
wherein the shank and the entire foot keel are monolithically formed; and
wherein the anterior facing continuous convexly curved surface extends the entire length of the ankle joint area and curvilinear prosthetic part of a leg defined by the shank.
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Accused Products
Abstract
A prosthetic foot (147) has a longitudinally extending foot keel (149) and a resilient, monolithically formed calf shank (148) extending upwardly from the foot keel to form an ankle joint area of the prosthetic foot and a lower, prosthetic part of a leg above the ankle joint area for connection with a lower extremity prosthetic socket on a person'"'"'s leg stump. At least the lower portion of the calf shank extending upwardly from the foot keel is anterior facing convexly curved. The shank and at least a portion of the foot keel are monolithically formed.
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Citations
13 Claims
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1. A prosthetic foot comprising:
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a continuously longitudinally extending foot keel having longitudinally aligned forefoot, raised midfoot, and hindfoot portions; a resilient, monolithically formed shank extending upwardly from the raised midfoot portion of the foot keel, by way of an anterior facing continuous convexly curved surface which extends over at least most of the length of the shank and has increasing radius of curvature defining an ankle joint area and a curvilinear prosthetic part of a leg extending substantially upward above human ankle joint height and the ankle joint area, the shank having a proximal portion for connection with a lower extremity prosthetic structure adapted to be secured to a person'"'"'s residual limb; wherein the ankle joint area and the prosthetic part of a leg formed by the shank are anterior facing convexly curved and provide means for sagital, anterior dorsiflexion and, posterior plantarflexion motion capabilities in response to a ground reaction force created in a person'"'"'s gait in the prosthetic foot; wherein the shank and the entire foot keel are monolithically formed; and
wherein the anterior facing continuous convexly curved surface extends the entire length of the ankle joint area and curvilinear prosthetic part of a leg defined by the shank. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A prosthetic foot comprising:
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a continuously longitudinally extending foot having longitudinally aligned forefoot, raised midfoot, and hindfoot portions; an ankle; an elongated, upstanding shank adapted to extend above human ankle joint height and the ankle; wherein the ankle, shank, and the entire foot are monolithically formed as a resilient member for improving the dynamic response of the prosthetic foot, the resilient member in the area of the ankle and shank being anterior facing convexly curved over the entire length of the ankle and shank of the resilient member above the foot, wherein the ankle extends upwardly from the raised midfoot portion of the foot, wherein the radius of curvature of the anterior facing convexly curved resilient member increases progressively as the resilient member extends upwardly from the foot, and wherein the resilient member provides means for sagital, anterior dorsiflexion and posterior plantarflexion motion capabilities in response to a ground reaction force created in a person'"'"'s gait in the prosthetic foot. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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Specification