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:
Nov. 12, 1991
Filed:
Feb. 11, 1991
Dietrich Stock, Braunschweig, DE;
Walter Hund, Oberkirch-Stadelhofen, DE;
Friemut Vizethum, Schwetzingen, DE;
Friedrichsfeld AG Keramik- und Kunststoffwerke, Mannheim, DE;
Abstract
A knee-jount endoprosthesis including a femoral part (2), a meniscus element (6) and a tibial part (12), the femoral part (2) and the tibial part (12) lying with their bearing surfaces in contact with associated bearing surfaces of the meniscus element (6). This endoprosthesis is capable of achieving the physiological knee-joint functions of movement and load-bearing while preventing local peak stresses, especially those caused by line or point contact. The femoral part (2) is provided with a spherical bearing surface (4) which lies on a corresponding spherical and concentrically disposed bearing surface (8) of the meniscus element (6). The tibial part (12) has a convex configuration and a cylindrical bearing surface which contacts a mating, coaxially arranged second bearing surface (10) on the meniscus element (6).