Bulb-operated modulating gas valve with minimum bypass
US5944257A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1997 |
| Grant date | Aug 31, 1999 |
| Priority date | — |
| Expiry date | Sep 18, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87338
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A multi-way valve unit which provides low pressure unregulated gas flow and high pressure regulated gas flow in an integrated gas control system. A main and bypass diaphragm valves control gas flow through the gas valve system, the main and bypass valves being opened by pressure differentials on their respective valve diaphragms. A regulator valve and a snap valve modify gas pressure applied to the main and bypass valves diaphragms respectively. A control means actuates the regulator and snap valves based on degree of temperature deficiency sensed in a monitored space. The control means opens the snap valve to provide unregulated gas flow when low gas pressure is required, and opens the regulator valve to provide regulated high flow when high gas pressure is required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.