Ratcheting tibial and femoral guide
US5613971A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1995 |
| Grant date | Mar 25, 1997 |
| Priority date | — |
| Expiry date | Aug 11, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/1764
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A bone drill guide having at least a first arm slidable within a bore of the body of the drill guide and a ratchet mechanism for locking the first arm and the first bore. The ratchet mechanism includes teeth on the first arm and a pawl biased along a first axis and having a continuous engagement edge for engaging the teeth of the first arm for any angular orientation of the pawl about the first axis. The continuous engagement edge is a curve in a plane transverse to the first axis for providing a substantially renewable point contact with the teeth. The recess includes side walls tapered towards the engagement edge to allow a narrow contact at the engagement edge and re-enforce face walls to absorb the axial forces of the guide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.