Patent ID: 9358137
Filing Date: 2016-06-07
CPC Classification: A61F

Claim Text:
1. An actuated knee joint prosthesis, the knee joint prosthesis comprising: a proximal connection member configured to operatively connect the knee joint prosthesis to an amputee; an actuator assembly comprising a first end, a second end, a powered actuator, and a mechanical elastic member spaced from the powered actuator, the powered actuator and the mechanical elastic member being positioned in series between the first and second ends, the actuator assembly being operatively connected to the proximal connection member at the first end at a position generally corresponding to that of a knee joint, the mechanical elastic member configured for shock absorption caused by the motion of the knee joint prosthesis, the mechanical elastic member and the powered actuator being located distally from the knee joint; a tibial member operatively connected to the second end of the actuator assembly and rotatably connected to the proximal connection member at least by the actuator assembly; and at least one torque sensor configured to measure a torque exerted by the actuator assembly, wherein movement of the actuator causes a corresponding relative rotation between the proximal connection member and the tibial member, and wherein there is only one powered actuator between the proximal connection member and the tibial member.