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:
Dec. 15, 1992
Filed:
Feb. 28, 1991
Applicant:
Inventors:
Assignee:
Sulzer Brothers Limited, Winterthur, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61F / ;
U.S. Cl.
CPC ...
623 22 ;
Abstract
A plastic acetabulum is provided with a plurality of cavities in the outer surface. Each cavity opens conically to the exterior of the acetabulum and the cavities are disposed in concentric rows about the axis of the acetabulum. The cavities are provided with a roughly fixed ratio of depth (t) to width (w) with the volume (v), depth (t) and width (w) decreasing from an edge of the acetabulum to a peak of the acetabulum. The depth and width of the cavities each decrease exponentially in proportion to the ratio of the diametric spacings of the cavity rows. Likewise, the volume of the cavities decrease exponentially from row-to-row in the direction of the peak of the acetabulum.