Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Leg – Knee
Patent
1996-02-23
1998-01-06
Willse, David H.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Leg
Knee
623 46, 188306, A61F 264
Patent
active
057049459
ABSTRACT:
A brake-action knee joint for a leg prosthesis includes a closed displacer chamber which concentrically surrounds the joint pin over its circumference, at least partially, is preferably filled with hydraulic oil, and is arranged in the associated end of the central part of the joint. The joint pin is designed as a rotary piston and is connected in torsionally rigid fashion to the upper part of the joint. The joint pin divides the closed displacer chamber into an extension chamber and a flexion chamber, which are connected to one another by way of an oil line which can be completely or partially closed by a valve plunger. The valve plunger is mounted in the central part of the joint in such a way as to be displaceable counter to the action of a valve-plunger spring pushing it into its open position and, when the central part of the joint is pivoted in the direction of flexion about the rocker pin arranged in the lower part of the joint, is pushed into its closed position by an adjusting device provided in the lower part of the joint.
REFERENCES:
patent: 1051288 (1913-01-01), Szydlowski
patent: 2519226 (1950-08-01), Coe
patent: 2530286 (1948-01-01), Catranis
patent: 2568053 (1948-10-01), Catranis
patent: 2667644 (1954-02-01), Johnson
patent: 3015825 (1962-01-01), Blatchford
patent: 4206519 (1980-06-01), Blatchford
patent: 4958705 (1990-09-01), Horvath
patent: 5181931 (1993-01-01), van de Veen
Krukenberg Manfred
Wagner Helmut
Otto Bock Orthopaedische Industrie Besitzund Verwaltungs-Kommand
Willse David H.
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