Artificial knee with improved stable link-type knee joint

Details Artificial knee with improved stable link-type knee joint Artificial knee with improved stable link-type knee joint

1988-08-26

1990-03-27

Apley, Richard J.

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

Leg

Knee

623 43, 623 46, A61F 280, A61F 264

Patent

active

049117092

ABSTRACT:
An improved knee prosthesis of the four bar kind employing modified geometry of its links permitting the available degree of flexion to be increased to 143.degree.. A resilient leaf spring provides for extension bias at low angles of flexion, and biases the joint towards its fully flexed position at high angles of flexion. An improved lock for the joint is also provided.

REFERENCES:
patent: 1365205 (1921-01-01), Stinehart
patent: 2208275 (1940-07-01), McCann
patent: 3182770 (1965-05-01), Shemet
patent: 3187347 (1965-06-01), Terron
patent: 3663967 (1972-05-01), Vermillion
patent: 3823424 (1974-07-01), May
patent: 4023215 (1977-05-01), Moore
patent: 4145766 (1979-03-01), May
patent: 4310932 (1982-01-01), Nader et al.

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