Patent ID: 11883304
Assignee: VANDERBILT UNIVERSITY
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 7:
8. A knee prosthesis, comprising:
a shank link;
a polycentric knee joint comprising an extension stop, the extension stop substantially preventing the knee prosthesis from hyperextending;
a thigh link rotatably coupled to the shank link by the polycentric knee joint;
at least one powered control element configured to power rotation of the thigh link relative to the shank link;
at least one sensor; and
a controller coupled to the at least one sensor, the controller configured to:
receive sensor measurements from the at least one sensor and determine, based at least on the sensor measurements, a present state of a plurality of states comprising at least a swing state and a stance state; and
cause the at least one powered control element to power rotation if the present state is a swing state;

wherein the polycentric knee joint is further configured to provide a center of rotation of the thigh link relative to the shank link, wherein the center of rotation is substantially posterior to a ground reaction force vector if the present state is the stance state, and
a plurality of revolute connecting links and a plurality of prismatic connecting links.