Split hexalobe driver device for use in surgical procedures
US9877766B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 10, 2015 |
| Grant date | Jan 30, 2018 |
| Priority date | — |
| Expiry date | Jul 22, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/8888
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A driver device (hexalobe or otherwise) that includes a handle portion, an elongate shaft portion, and an end portion that includes a screw engagement portion and a split manufactured offset from the central axis of the end portion and/or the screw engagement portion, forming two asymmetric halves of the end portion and/or screw engagement portion. This screw engagement portion is slightly oversized relative to the corresponding tool engagement recess of the locking cap, set screw, or bone screw. Thus, when the screw engagement portion is pressed into the corresponding tool engagement recess of the locking cap, set screw, or bone screw, the split manufactured offset from the central axis of the end portion and/or the screw engagement portion allows the screw engagement portion to compress slightly, creating a friction fit between the screw engagement portion and the corresponding tool engagement recess of the locking cap, set screw, or bone screw.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.