Patent · US Expired

Hip joint prosthesis

US5108446A · kind A · utility

142Cited by

2References

14Claims

0Family size

Assignee

Sulzer Brothers Limited · CH

Inventors

Heinz Wagner · Schwarzenbruck, DE
Roland Willi · Neftenbach, CH

Key dates

Filing date	Sep 30, 1991
Grant date	Apr 28, 1992
Priority date	—
Expiry date	Sep 30, 2011

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61F2310/00029
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

The hip joint prosthesis consists of two cups which are anchored together in the direction of the polar axes by a snap connection. The inner cup is made of cobalt alloy and outer cup of titanium. The outer cup carries a straddling dowel which projects into the bone tissue and which is subdivided into radially deflectable segments having sharp edges thereon. The inner cup has a shaped body which projects into the dowel and which is shaped so as to expand the deflectable segments upon rotation of the inner cup within the outer cup. Each dowel segment is provided with a notch to receive a corner of the shaped body so as to hold the body in a holding position in a snap-fit manner.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.