Bottom loading polyaxial ball and socket fastener with blocking ring with notched split ring
US10258385B1 · kind B1 · utility
6Cited by
31References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2018 |
| Grant date | Apr 16, 2019 |
| Priority date | — |
| Expiry date | Jul 20, 2038 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/037
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The bottom loading fastening system that consists of the polyaxial ball and socket joint used in conjunction with a bone screw. The system allows attachment to a bone screw using a retaining ring with a blocker ring to assure proper ring positioning. The retaining ring having a continuous inner surface wall and an outer wall having a notch. Upon installation the retainer wall is expanded causing a break at the notch producing an audible and tactile indication that the sufficient force has been applied to set the retainer and blocker rings locking the bone screw to a U-shaped connecting assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.