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Prosthetic foot

  • US 5,219,365 A
  • Filed: 08/26/1992
  • Issued: 06/15/1993
  • Est. Priority Date: 03/31/1988
  • Status: Expired due to Fees
First Claim
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1. An energy storing prosthetic foot comprising a keel formed of an energy storing material, wherein the keel comprises a heel portion characterized by an elongate member, a forefoot portion characterized by an elongate member and an ankle portion, wherein the inferior aspects of the heel portion, the ankle portion and the forefoot portion define a resilient arch in the keel, wherein the keel is supported in the prosthetic foot so that the apex of the resilient arch is generally under the ankle portion of the prosthetic foot, wherein the keel is supported in the prosthetic foot so that the resilient arch is capable of expanding in response to a load on the prosthetic foot for storing energy and capable of contracting as the load is lifted to release the stored energy, wherein the keel is supported in the prosthetic foot so that in the assembled prosthetic foot the space under the resilient arch is substantially unobstructed, and wherein substantially all the energy storing capacity of the prosthetic foot resides in such expansion and contraction of the resilient arch of the keel.

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