Polyaxial ball and socket fastener with spot welded blocking ring
US10285738B1 · kind B1 · utility
16Cited by
0References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2018 |
| Grant date | May 14, 2019 |
| Priority date | — |
| Expiry date | Nov 14, 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 spot welded to a blocker ring to assure proper ring positioning. Upon installation the retainer wall is expanded causing a break from the blocker ring 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.