Patent · US Expired

Rotational offset knee prosthesis

US4136405A · kind A · utility

107Cited by

4References

5Claims

0Family size

Assignee

Zimmer US, Inc. · US

Inventors

Dan L. Pastrick · Palm Desert, US
John M. McDaniel · Warsaw, US

Key dates

Filing date	Apr 29, 1977
Grant date	Jan 30, 1979
Priority date	—
Expiry date	Apr 29, 1997

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61F2/384
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A knee joint prosthesis comprises cooperating femoral and tibial components and a coupling which is arranged to make a hinged connection therebetween. Interdisposed hinge knuckles and a cooperating pintle define a lateral-medial pivot axis that is located posteriorly of the intersection between the intermedullary femoral and tibial axes. A pair of transverse confronting plateaus transmit vertical load forces between the elements of the prosthesis. A proximal-distal axle and a cooperating tubular bearing afford rotational motion, and this motion is limited by a stop system, which system is also arranged to permit restricted distraction.

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