Multi-functional artifical knee joint

Details Multi-functional artifical knee joint Multi-functional artifical knee joint

2006-02-14

2006-02-14

Willse, David H. (Department: 3738)

Prosthesis (i.e., artificial body members), parts thereof, or ai

Having fluid actuator

C623S043000, C623S044000, C188S313000, C188S322130

Reexamination Certificate

active

06997959

ABSTRACT:
An artificial knee joint connects a prosthetic lower leg to a residual thigh of a prosthesis wearer, and includes a knee-extending oil passage and a knee-flexing oil passage that is provided with a throttle valve. When the lower leg is pressed against the ground by the thigh, a controlling element activates the throttle valve to close the knee flexing oil passage so as to fix the thigh relative to the lower leg. Upon fast walking of the wearer, an air valve unit activates the throttle valve to reduce flow rate of oil flowing through the knee-flexing oil passage so that the lower leg can support the thigh effectively.

REFERENCES:
patent: 5904721 (1999-05-01), Henry et al.
patent: 6117177 (2000-09-01), Chen et al.
patent: 6558430 (2003-05-01), Nakaya et al.
patent: 6706074 (2004-03-01), Chen
patent: WO 9222267 (1992-12-01), None

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