Artificial polycentric knee joint

Details Artificial polycentric knee joint Artificial polycentric knee joint

1976-09-23

1977-12-27

Frinks, Ronald L.

3 21, A61F 104, A61F 108

Patent

active

040645690

ABSTRACT:
An artificial polycentric knee-joint mechanism comprising a four-bar linkage arranged to provide a motion similar to a normal knee having positive stability during ambulation. The four bars include a knee-mounting block mounted to the stump-receiving socket member and a lower linkage support-carriage member affixed to the lower limb component, the mounting block and linkage support being operably interconnected by side bar links, one of which is tension controlled. Also, included is a braking control to insure normal swing phase movement of the artificial leg and a shock absorbing device to prevent excess terminal impact when the lower limb returns to the extended position of the leg prosthesis.

REFERENCES:
patent: 3820169 (1974-06-01), Long et al.
patent: 4005496 (1977-02-01), Wilkes

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