Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Leg – Knee
Patent
1996-03-28
1998-05-26
Weiss, John G.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Leg
Knee
623 43, 623 45, A61F 264
Patent
active
057558132
ABSTRACT:
A prosthetic brake joint includes an upper joint portion, a lower joint portion, and a joint shaft which pivotably connects the two joint portions together. The joint shaft, designed as a brake shaft, is connected to the lower joint portion for fixed rotation with the lower joint portion. A brake bushing surrounds and rotates about the joint shaft and operates as a bearing. The brake bushing is connected to a clamping or support portion for fixed rotation with the clamping or support portion. The upper joint portion is mounted to the clamping or support portion in an articulated manner via a pivot axle. Under loading, the upper joint portion impacts the clamping or support portion and thus the brake bushing, and thereby exerts a braking force on the joint shaft. The brake bushing is surrounded by an annular brake chamber which is filled with an incompressible medium. The annular brake chamber communicates, for purposes of fluid exchange, with a closed hollow space integrated in the clamping or support portion. A pressure piston supports the upper joint portion and protrudes into the closed hollow space to impact the incompressible medium which compresses the brake bushing against the joint shaft to brake rotation of the prosthetic knee joint.
REFERENCES:
patent: 2519226 (1950-08-01), Coe
patent: 3015825 (1962-01-01), Blatchford
patent: 3863274 (1975-02-01), Glabiszewski
patent: 4152787 (1979-05-01), Megsyesy
patent: 4997449 (1991-03-01), Prahl et al.
patent: 5545233 (1996-08-01), Fitzlaff
Otto Bock Orthopaedische Industrie Besitz-Und Verwaltungs-Komman
Snow Bruce E.
Weiss John G.
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