Electrical switch construction diaphragm seal therefor and methods of making the same
US4342894A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1980 |
| Grant date | Aug 3, 1982 |
| Priority date | — |
| Expiry date | Oct 6, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrical switch construction having a housing carrying an electrical switch and an actuator for actuating an operating plunger of the electrical switch, the construction having a flexible diaphragm seal disposed against the electrical switch to seal the same to a part of the housing and define a chamber with that part of the housing so that the electrical switch is sealed therein. The diaphragm seal has a portion thereof disposed between the plunger and the actuator. The diaphragm seal has means for preventing a pressure increase in the chamber thereof that would adversely act across the portion of the diaphragm seal when there is an increase in the volume of fluid in the chamber regardless of whether the increase in volume is caused by a change in temperature and/or an out gasing of the plastic parts of the switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.