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:
Mar. 24, 1981
Filed:
May. 09, 1979
John T Scales, Stanmore, GB;
Keith W Wright, Ruislip, GB;
National Research Development Corporation, London, GB;
Abstract
An endoprosthetic knee joint device has femoral and tibial components respectively adapted for connection to the femur and tibia, and respective bearing surfaces for mutual articulatory engagement to simulate natural joint movements. It is now proposed that the femoral component has two transversely spaced sockets as bearing surfaces, and that the tibial component has two upstanding ball parts for respective articulation in the sockets. The ball parts can be separable, by the provision of stems engageable in apertures in the base part. Preferably, the sockets are enlarged relative to the balls to allow mutual rotation about the axis of the leg. Also, the sockets and balls can be of different material from their respective base parts, the latter suitably being of metal.