Pneumatically operated gas-pressure controller
US4966188A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1989 |
| Grant date | Oct 30, 1990 |
| Priority date | — |
| Expiry date | Aug 16, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/777
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A pneumatically operated gas-pressure controller is provided having a setting device and a controller, wherein the controlling gas for the energy supply of the controller is drawn on the input side of the gas-pressure controller, fed to the controller by means of a throttle valve and discharged on the outlet side by means of a drain conduit. The controller supplies the setting pressure for the setting device by means of a setting pressure conduit and includes a twin diaphragm system having two diaphragms with different surface areas, the diaphragms are interconnected and arranged one above the other so as to oppose one another. A booster valve is associated with the diaphragm having the smaller surface area and is acted upon by the setting pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.