Patent ID: 8808395
Filing Date: 2014-08-19
Classification: A61F,Y10T

Abstract:
1. A lower extremity prosthesis comprising: a foot keel, a monolithic, integrally formed, elongated resilient shank, and a leg attachment; wherein the shank extends upwardly from a hind foot area of the foot keel forming an anterior facing convexly curved ankle joint area and a lower, prosthetic part of a leg above the ankle joint area by way of an anterior facing convexly curved portion; wherein the shank has a composite structure which includes multiple compressive load bearing shank sections which are sagitally oriented and extending longitudinally in the elongated shank between upper and lower ends of the shank where the shank sections are connected together, and intermediate the upper and lower ends shank sections are unbounded in one or more portions with each other, and wherein the shank sections incorporate at least one of voids and inserted materials between one or more shank sections to enhance shank flexibility while reducing stresses which can cause premature failure.