Hand-operated double-acting trigger switch
US4122320A · kind A · utility
39Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 9, 1977 |
| Grant date | Oct 24, 1978 |
| Priority date | — |
| Expiry date | May 9, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H3/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A hand-operated, double-action trigger switch is mounted in the handle area of a portable electric tool and comprises a thumb-actuated safety button protruding from the upper portion of the handle and a finger depressable trigger on the lower portion of the handle. The safety button must be pushed by the operator's thumb before the trigger can be depressed. Upon release of the pressure on the trigger, the safety button returns to its original position and effectively places the device in an inoperable or locked position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.