Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Leg – Knee
Patent
1991-04-19
1993-09-21
Isabella, David
Prosthesis (i.e., artificial body members), parts thereof, or ai
Leg
Knee
623 24, 623 25, 623 44, 901 21, A61F 262, A61F 210, A61F 264, B25J 1100
Patent
active
052464652
ABSTRACT:
A robotic knee for mounting on an upper leg stump of an allows movement from a standing position to a normal walking position and then to a kneeling position and return to a standing position. A mounting plate receives the upper leg stump of an amputee. The knee includes a housing having a drive motor which can be rotated in one direction to bend the knee and then reversed to straighten the knee. The drive motor turns a worm gear which engages a main drive gear. A pair of extension pulleys is mounted on a main drive gear shaft attached to the main drive gear. A pair of extension cables is attached at a first end to the extension pulleys and wrapped thereon. A second end of the extension cables is attached to a front portion of a mounting plate. A pair of flexion pulleys is also attached to the main drive gear. A pair of flexion cables is attached at a first end to the flexion pulleys and wrapped thereon. A second end of the flexion cables is attached to a rear portion of the mounting plate. On a bottom of the mounting plate is disposed a rack with rack teeth. The rack teeth engage a walking gear segment, thereby allowing the mounting plate to be moved up and down in a rocking motion by the extension and flexion cables, the rack teeth rock on the walking gear segment allowing the knee to simulate a natural rocking motion.
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Hull Marlin B.
Rincoe Richard G.
Burke Elizabeth M.
Crabtree Edwin H.
Isabella David
Margolis Donald W.
Rincoe Richard G.
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