Intervertebral disk prosthesis
US5674294A · kind A · utility
486Cited by
7References
9Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 14, 1994 |
| Grant date | Oct 7, 1997 |
| Priority date | — |
| Expiry date | Sep 14, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00796
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A disk prosthesis for replacing a damaged spinal disk has two metal half-envelopes which confine between them a compression cushion having a controlled differential compression. The structure employs a membrane or diaphragm surrounding the compression cushion in order to insure a seal between the cushion and the environment and also has an anti-expulsion system for shaping the compression cushion in order to limit the expansion of the cushion out of the volume defined by the two metal cups and the membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.