Patent · US Expired

Femur head prosthesis

US5108450A · kind A · utility

13Cited by

4References

12Claims

0Family size

Assignee

Sulzer Brothers Limited · CH

Inventors

Willi Horber · Zürich, CH
Rudolf Koch · Oberhaching, DE

Key dates

Filing date	Sep 6, 1991
Grant date	Apr 28, 1992
Priority date	—
Expiry date	Sep 6, 2011

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61F2002/30919
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A femur head prosthesis consists of a shaft having several plate springs fixed unilaterally, which are enclosed by a thin-walled and deformable shell body. The shell body is connected to the shaft edge and seals the enclosed volume so as to be impermeable to air. The plate springs are laminated springs, which are separated by slits. The depth of the slits towards the proximal end leaves a narrow unslit yoke part. When an intermittent load occurs, a slight bending of the yoke part results and, within the yoke part, a slight displacement of the plate springs with respect to one another to result in a damping and a non-linear increase in the compressive force.

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