Screwdriver
US4680996A · kind A · utility
25Cited by
4References
4Claims
0Family size
Inventor
Key dates
| Filing date | Apr 18, 1986 |
| Grant date | Jul 21, 1987 |
| Priority date | — |
| Expiry date | Apr 18, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R43/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A screwdriver having its blade end rotated slightly about its longitudinal axis and also provided with arcuate cutouts at the rotation, so that the combination of these two structural features provides an aligning edge that remains in the observation of the user and facilitates placement of the screw-turning edge in the slot of a screw head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.