The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 1998
Filed:
Mar. 28, 1996
Manfred Krukenberg, Duderstadt, DE;
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.