Securing fasteners
US8734495B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 18, 2012 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Jul 8, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/8685
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A polyaxial fastener is secured within an implant with a retaining ring. The ring is assembled onto a circumferential groove formed in the fastener head. The groove and ring are positionable, when the fastener is installed into an implant, at a wide portion of the mating polyaxial aperture in the implant. The ring is compressible into the groove to form a narrowed diameter, which is passable into a narrow diameter of the aperture, near an entrance to the aperture. The ring is released to expand and increase an overall diameter of the head and ring assembly, thereby rending the assembly too wide to pass by the narrow entrance to the aperture, thereby securing the assembly within the implant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.