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:
Jul. 28, 1992
Filed:
Sep. 30, 1991
Heinz Wagner, Schwarzenbruck, DE;
Roland Willi, Stadel, CH;
Sulzer Brothers, Winterthur, CH;
Protek AG, Berne, CH;
Abstract
The cap for a femur head can be imbedded without the use of cement and includes an outer shell of hemispherical shape so that forces an be transferred in various positions of the joint without any discontinuity in the surface. In addition, an inner shell is secured within the outer shell and is provided with a conically tapered internal surface at the outer edge and an internal self-tapping screw thread for screwing onto a stump of a femur head. The shell also has an internal curved surface for abutting against the stump to inhibit continued threading of the cap onto the stump. Internal cutting rings may also be provided internally of the inner shell for cutting into the osseous tissue of the femur head.