Prosthetic foot with tunable performance
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United States of America Patent
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Issued Date -
Sep 13, 2007
app pub date -
Dec 22, 2006
filing date -
Mar 30, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A lower extremity prosthesis including a foot, an ankle, a shank and a posterior calf device to store energy during force loading of the prosthesis and return the stored energy during force unloading to increase the kinetic power generated for propulsive force by the prosthesis in gait. The posterior calf device includes at least one coiled spring formed monolithically with the shank and having a free end, and at least one elongated member extending between the free end of the at least coiled spring and the lower portion of the prosthesis. The at least one coiled spring is resiliently uncoiled in response to anterior movement of the upper end of the shank in gait for storing energy.
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