Artificial knee joint
US7955394B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 13, 2006 |
| Grant date | Jun 7, 2011 |
| Priority date | — |
| Expiry date | Dec 19, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2002/30616
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The artificial knee joint includes a femoral component, a tibial tray and an insert plate fixed onto the top surface of the tibial tray. The femoral component includes a femoral articular surface and a cam that is provided on the rear end of the femoral articular surface and protrudes from the femoral articular surface, the insert plate includes a tibial articular surface that makes contact with the femoral articular surface and a cam-receiving slide surface that makes contact with the cam. When the knee is extended, the joint takes a first sliding state in which the femoral articular surface slides against the tibial articular surface. When the knee is bent at an angle in a range from 90 to 160 degrees, the joint shifts from the first sliding state to a second sliding state in which the cam slides on the cam-receiving slide surface. When the knee is bent deeply with a bending angle of 180 degrees, the second sliding state is assumed in which a resection surface of the femoral component and the rear end of the insert plate are offset.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.