Screwdriver
US4212336A · kind A · utility
17Cited by
13References
4Claims
0Family size
Inventor
Key dates
| Filing date | Jul 24, 1978 |
| Grant date | Jul 15, 1980 |
| Priority date | — |
| Expiry date | Jul 24, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25G1/005
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An improved screwdriver includes a well at the top of the handle adapted to receive a torque producing socket wrench drive and couple the torque producing drive directly to the shank of the screwdriver. In one embodiment, the well is defined as a square cross-section opening, adapted to receive the drive stud of a conventional socket wrench drive. In another embodiment the screwdriver shank, adapted to receive a standard socket wrench, extends into the well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.