Bone anchor having a snap-fit assembly
US9924975B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2017 |
| Grant date | Mar 27, 2018 |
| Priority date | — |
| Expiry date | Jun 21, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/864
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A pivotal bone anchor assembly includes a shank sub-assembly comprising a shank and a coupler, and a receiver sub-assembly comprising a receiver having a bore with a bottom opening and a snap-fit assembly proximate the bottom opening comprising an insert, a retainer ring positioned within an expansion chamber, and a positioner configured to hold the retainer ring in position. The shank sub-assembly is uploaded through the receiver bottom opening such that the positioner is pushed up into a holder chamber and the retainer rings engages a circumferential locking groove of the coupler to secure the shank sub-assembly with the receiver sub-assembly with a snap-fit connection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.