Polyaxial facet fixation screw system
US8529609B2 · kind B2 · utility
42Cited by
26References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2010 |
| Grant date | Sep 10, 2013 |
| Priority date | — |
| Expiry date | Jul 5, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/8695
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A screw system includes a screw and a washer assembly captive to the screw. The washer assembly is polyaxially pivotable relative to the screw. The screw may be freely rotated in one direction relative to the washer assembly, but frictionally binds with the washer assembly when rotated in a second direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.