Insulating screwdriver having wear identification function
US7882769B2 · kind B2 · utility
15Cited by
8References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 16, 2008 |
| Grant date | Feb 8, 2011 |
| Priority date | — |
| Expiry date | Apr 30, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F3/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An insulating screwdriver includes a handle, a drive shank having a first end mounted in the handle and a second end protruding outwardly from the handle, an insulating jacket mounted on the second end of the drive shank, and an identification insulating sleeve mounted between the second end of the drive shank and the insulating jacket. Thus, when the insulating jacket is worn out or broken due to friction or hit, the identification insulating sleeve is still located outside of the drive shank to provide a secondary insulating effect to the drive shank so as to protect the user when operating the drive shank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.