Torque sensing automatic shut-off and reset clutch for screwdrivers, nutsetters and the like
US5156244A · kind A · utility
28Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1990 |
| Grant date | Oct 20, 1992 |
| Priority date | — |
| Expiry date | Oct 31, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B23/145
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An improved torque control and fluid shut-off mechanism for a fluid operated tool includes a driving clutch member and a driven bit holder connected by ball bearings retained by the clutch member which engages in pockets in the bit holder. The pockets include a specific ramp construction which insures that the threshold torque level of the tool in the forward direction is less than the threshold level in the reverse direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.