Metal and plastic composite tibial component for knee joint
US4501031A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1981 |
| Grant date | Feb 26, 1985 |
| Priority date | — |
| Expiry date | Jan 22, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24545
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A prosthetic joint component which is comprised of a metal retainer and a plastic bearing portion which is molded integrally onto the top surface of the metal retainer. The metal retainer includes a plurality of notches spaced apart from each other around the periphery of the retainer. The notches enable the plastic, during the molding process, to flow through the notches to create a thickness of plastic completely surrounding the upper surface and the peripheral edge of the retainer (or metal base plate) and terminating in a lower plastic rim surface which is flush with the perimeter of the lower surface of the metal base plate, forming a strong mechanical interlock between the metal and plastic portions of the prosthetic joint component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.