Artificial knee joint having a minimum knee angle

Details Artificial knee joint having a minimum knee angle Artificial knee joint having a minimum knee angle

2006-08-08

2006-08-08

Snow, Bruce E. (Department: 3738)

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

Leg

Knee

Reexamination Certificate

active

07087091

ABSTRACT:
An artificial knee joint includes a knee seat attached to a residual thigh, a support frame attached to a prosthetic lower leg, and a driving member disposed pivotally in a mounting recess in the knee seat. A cushion device is disposed between the knee seat and the driving member. Two links have lower ends connected pivotally to the support frame. Two pivot pins extend respectively through upper ends of the links, and are journalled respectively within two mounting holes in the driving member by two bearing members, at least one of which is configured as a unidirectional bearing. When a knee angle is equal to a threshold angle, a pin-locking member is disposed in a pin-locking position so as to prevent rotation of the pivot pins within the driving member and, thus, relative rotation between the knee seat and the support frame.

REFERENCES:
patent: 4451939 (1984-06-01), Thompson
patent: 5800566 (1998-09-01), Gramnas
patent: 5921358 (1999-07-01), Gramnas
patent: 6752835 (2004-06-01), Shen
patent: 2005/0038523 (2005-02-01), Cheng
patent: 2005/0240129 (2005-10-01), Daiju

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