Pneumatic acutated switch
US5471022A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1994 |
| Grant date | Nov 28, 1995 |
| Priority date | — |
| Expiry date | Sep 2, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H35/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A diaphragm assembly for movement in response to a pressure increase exerted thereon comprised of a resilient flexible diaphragm having a first surface with a predetermined profile when said diaphragm is in a neutral, unflexed condition, the diaphragm having an opening formed therethrough. A rigid pressure plate is adapted to be positioned against the diaphragm. The plate has a contoured surface for mating engagement with the first surface of the diaphragm. The contoured surface has a recessed sealing surface dimensioned to form an open space between the plate and the diaphragm when the diaphragm is in the neutral, unflexed condition, and to enable the diaphragm to flex into sealing engagement therewith when sufficient pressure is exerted on said diaphragm. A first vent passage communicates the opening in diaphragm with the open space, and a second vent passage communicates the open space with the edge of the pressure plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.