Sealed gas control valve
US4773848A · kind A · utility
5Cited by
13References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1987 |
| Grant date | Sep 27, 1988 |
| Priority date | — |
| Expiry date | Jul 29, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23Q9/08
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A gas burning furnace is disclosed with a sealed and vented gas control valve. Sealing the gas control valve in an enclosure shields the control valve from the external environment. By venting the enclosure to the furnace pilot light, any gas leaking from the gas control valve into the enclosure is conducted to and ignited by the pilot light in a deliberate controlled manner, thereby precluding an explosion in the enclosure. Other safety features disclosed include an overheat shut-off, pilot light extinguished shut-off and blower malfunction shut-off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.