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:
Feb. 01, 1977
Filed:
Jun. 13, 1975
Donald F Wilkes, Albuquerque, NM (US);
Hosmer/Dorrance Corporation, Campbell, CA (US);
Abstract
A prosthetic knee joint having a femoral member and a tibial member each of which is provided with a bearing surface. The bearing surface of the tibial member supports the bearing surface associated with the femoral member such that flexion between the tibial member and the femoral member causes the respective bearing surfaces to roll relative to one another. Rollers, cam surfaces and guide slots are provided to ensure the retention of the proper relationship for this rolling contact between the tibial bearing surface and the femoral bearing surface. The knee joint includes a mechanical brake which produces a brake force that increased with flexure between the tibial member and the femoral member. The brake includes a resilient deformable element which transmits a brake applying force to a brake shoe which is operable along an axis generally perpendicular to the direction in which the force is applied. Hyperextension of the knee joint is mechanically limited and a torsion rod accommodates torsional motion between the knee joint and a lower leg to which it may be attached. The knee joint also includes a member which simulates the movement of the patella bone of a human knee.