Patent ID: 6488717
Filing Date: 2002-12-03
Classification: A61F

Abstract:
A leg prosthesis for use by above-the-knee leg amputee comprising:(a) a reciprocating pylon comprising first and second concentric pylons, where said first pylon comprises an insert fitted within the first pylon, wherein the first pylon and insert define a slot accommodating a pin affixed to the second pylon, and said first pylon closely fits and slides within the second concentric pylon to permit axial displacement between the first and second pylon; (b) an outer flange fitting affixed to the first pylon and having a first inward facing cup; (c) an opposite flange fitting affixed to the second pylon and having a second inward facing cup; (d) a coil spring extending between and fitting within the first and second inward facing cups; (e) a pedestal having a lower ground-engaging surface that supplies 360 degree rotation at heel strike, and an upper surface defining a cylindrical opening; (f) an adapter affixed to the second pylon, said adapter having a lower circular disc fitting closely within the pedestal cylindrical opening; wherein the insert and adapter each comprise a low-friction material such that additional lubrication or seals are not required and wherein the prosthesis does not include an artificial knee joint.