Knee joint structure for artificial legs

Details Knee joint structure for artificial legs Knee joint structure for artificial legs

1977-11-14

1979-12-18

Crowder, Clifford D.

A61F 104

Patent

active

041786424

ABSTRACT:
An artificial leg of the kind in which the shin portion and the knee portion are shaped from a block of wood or similar solid material, has the knee and shin portions connected by pairs of front and rear links, the effective length of the front links being less than that of the rear links and the connections between the links and the knee and shin portions being positioned so as to form an articulation of which the instantaneous center of rotation lies upon an ascending curve for a predetermined angle of relative rotation between the two portions of the leg from the fully extended position. The resultant joint provides a stable weight support until it has been flexed through the predetermined angle and is thereafter capable of flexure through more than a right angle.

REFERENCES:
patent: 2000066 (1935-05-01), Didier
patent: 2057534 (1936-10-01), McCann
patent: 2170580 (1939-08-01), Steele et al.
patent: 2559446 (1951-07-01), Lucas et al.
patent: 3309715 (1967-03-01), Nader et al.
patent: 3694823 (1972-10-01), May
patent: 3823424 (1974-07-01), May
patent: 4064569 (1977-12-01), Campbell

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