Tulip bone screw assembly
US9603632B1 · kind B1 · utility
11Cited by
10References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 2016 |
| Grant date | Mar 28, 2017 |
| Priority date | — |
| Expiry date | May 20, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/00526
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A tulip bone screw assembly has a bone screw, a tulip and a saddle. The bone screw has a threaded shank and a polyaxial head. The tulip has a slotted opening for receiving a rod and an open distal end for passing the shank of the bone screw and holding the head and a locking ring positioned between the slotted opening and the distal end. The saddle has an axis defined by a center opening, a proximal concave end for engaging and holding the rod and a distal end with a plurality of friction fingers bent inwardly toward an axis of the saddle for applying a friction force to the head of the bone screw.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.