Locking structure for screwdriver
US6260446A · kind A · utility
19Cited by
3References
1Claims
0Family size
Inventor
Key dates
| Filing date | Feb 1, 2000 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Feb 1, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B13/463
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A screwdriver locking structure including a handle, a socket, a ratchet wheel, a pair of blocks with springs, a bearing and a ring, the handle comprises a barrel at one end to receive the socket which then connects to the ratchet wheel. The barrel further receives the blocks and springs which urge the blocks meshing with the ratchet wheel in an opposing direction. The ring comprises a board and a side wall, the plate comprises a pair of protuberances at inside which engage with the blocks when the ring rotates, and the side wall comprises recesses, one of which remains contact with the bearing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.