Endoprosthetic knee joint
US4257128A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 1979 |
| Grant date | Mar 24, 1981 |
| Priority date | — |
| Expiry date | May 9, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2/3854
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.