Compressed-air screwdriver with shutoff bypass means
US4480699A · kind A · utility
8Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 11, 1979 |
| Grant date | Nov 6, 1984 |
| Priority date | — |
| Expiry date | Sep 11, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B23/145
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention relates to a compressed-air screwdriver including a tool spindle, displacable against the action of a spring; an automatic shutoff having a valve for the motor, which upon attaining a predetermined torque is turned off and a device whose actuation, after the automatic shutoff, permits the motor to be put back into operation so that a screw can be further tightened or loosened with increased torque.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.