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. 31, 1990
Filed:
Aug. 11, 1989
Applicant:
Inventors:
Hans-Georg Willert, Gottingen, DE;
Rudolf Koch, Berlingen, CH;
Assignee:
Sulzer Brothers Limited, Winterthur, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61F / ; A61F / ;
U.S. Cl.
CPC ...
623 23 ; 623 16 ; 623 18 ;
Abstract
The fixing stem is provided with a plurality of projections in the proximal region of the blade. Each projection is in the form of a pyramidal prism directed in a distal direction. The apex of each projection is sharp and is inclined at an acute angle to the surface of the blade. In addition, the projections are staggered along the length of the proximal region of the blade and are of decreasing height in the distal direction.