Bone fixation plate
US7963981B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2004 |
| Grant date | Jun 21, 2011 |
| Priority date | — |
| Expiry date | Oct 30, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/8655
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus for reducing the profile of a bone fixation plate while preventing backing out of screws is disclosed. The apparatus includes at least one section of relief and sections of engagement. The plate has at least two openings though which two screws can pass through bony tissue. As the screw is tightened, it will begin to lag the plate to the bone. When the screw head interferes with the plate at the interference point, there is a slight resistance that insertion forces can overcome. When the screw is advanced further, it snaps into the sliding fit area and is allowed to move freely. The forces that cause the screw to back out from the plate are preferably not strong enough to pass the screw head back past the interference section. It may be desirable to include a set screw to help prevent backout.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.