Patent ID: 9687364
Date: 2017-06-27
CPC Classifications: A61F

Claim:
1. A polymeric composite or nanocomposites based passive polycentric knee joint, the knee joint comprising: a top part having a top face and a bottom face, wherein the top face having an adapter coupled firmly with the top part to transfer the load from a stump of amputee via a socket; a bottom part having a top face and a bottom face; at least one middle linkage pivotably coupling a middle posterior region of the top part with a middle posterior region of the bottom part; two side linkages pivotably coupling sides of the top part with sides of the bottom part, a compression spring along with a cylindrical rod positioned in the interior of the bottom part which fully arrests flexion-extension motion of the knee joint when the top and bottom parts are engaged, and which allows for flexion-extension motion of the knee joint when the top and bottom parts are disengaged; at least two extension springs coupling the top and bottom part through two tiny holes and through supporting beams in the top and bottom part for flexion and extension of the knee joint; and a bumper positioned in the base of the bottom part which contacts with a pylon to absorb the vibration and the terminal impact during the hip hike.