Screw and driver for securing a bone block
US5423819A · kind A · utility
282Cited by
22References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 17, 1992 |
| Grant date | Jun 13, 1995 |
| Priority date | — |
| Expiry date | Aug 17, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/861
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A screw and driver combination designed so that the screw is releasably axially couplable with the driver and so that the screw is positively rotatably engageable with the driver. The screw comprises an axial bore of circular cross section and a counterbore of polygonal cross section. The driver comprises a radially-compressible front portion sized to engage the axial bore of the screw with a minor spring interference fit and an intermediate portion sized to positively rotatably engage the counterbore of the screw.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.