Prosthetic bearing assembly
US5108445A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1990 |
| Grant date | Apr 28, 1992 |
| Priority date | — |
| Expiry date | Dec 21, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00011
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A prosthetic acetabular cup 100 includes a fixation element 102 for introduction into the acetabulum. The fixation element 102 has a concave inner surface with a generally circular base formed in a plane generally perpendicular to the central longitudinal axis. A bearing component 7 is formed from a deformable material and has a concave opening therein for receiving a spherical head of a prosthetic femoral component. The bearing component 7 has an outer surface that nests within the concave inner surface of the fixation element 102. A snap lock mechanism is used to lock the bearing component 7 within the fixation element 102 in the axial direction. Both the fixation element 102 and the bearing component 7 include a plurality of circumferentially spaced recesses 3, 12 located around a common pitch circle adjacent the generally circular base of the fixation element 102. When aligned, the recesses 3, 12 form a combined recess of predetermined shape for receiving a pin 20 which is inserted therein to prevent relative rotation between the bearing component and the fixation element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.