Defeater for mechanical safety interlock for covers of explosion-proof electrical housing
US4031340A · kind A · utility
8Cited by
6References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 7, 1975 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Nov 7, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20238
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An explosion-proof electrical enclosure has a body, switch mounted within the body, two threaded caps cooperatively engaging manually defeatable locking bolts in the body which prevent rotation of the caps and manually operated interlocking mechanism mounted in the body to actuate a switch and prevent unlocking of the bolts in the switch on position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.