Prosthesis for arthroplasty of the hip
US4173797A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 1977 |
| Grant date | Nov 13, 1979 |
| Priority date | — |
| Expiry date | Aug 17, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00011
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A hip prosthesis comprising a thin metal cotyloid cup, substantially spherical in form, the dimensions of the outer surface of which are substantially equal to those of a the cotyloid cavity, and which is provided with a peripheral flange for abutting on the bone around the cotyloid cavity and for preventing the cup from pivoting; a thin femoral cup, also made of metal, extended by a skirt and substantially in the form of a finger guard; and a relatively thick intermediate cup made of plastics material, having a spherical outer surface adapted to pivot in the cotyloid cup, and an inner surface comprising a spherical central part extended by a cylindrical portion which fits on the femoral cup so as to allow said latter to move only in rotation about the axis of symmetry of the cups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.