Torque responsive motor shutoff mechanism for fluid operated tool
US4223745A · kind A · utility
11Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 15, 1978 |
| Grant date | Sep 23, 1980 |
| Priority date | — |
| Expiry date | Sep 15, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B23/145
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A pneumatic torque tool includes a torque responsive mechanism which actuates a valve closure member by release of an elongated actuating rod. A movable valve seat is biased in a first position by pressure fluid supplied to the tool and upon release of the actuating rod the valve closure member engages the seat to shut off air flow to the tool motor. Upon closure of an operator actuated valve the seat is biased to a second position for resetting the actuating rod and closure member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.