Apparatus and method for sensing flammable vapor
US6554608B1 · kind B1 · utility
14Cited by
44References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 3, 2000 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Oct 31, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24H1/205
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An apparatus and method for operating a pilot burner apparatus and a main burner apparatus of a gas-fired appliance. The pilot burner apparatus draws combustion air from a first environment. The main combustion apparatus draws air from a second environment. In a shutdown condition, such as when a flammable vapor source is accidentally exposed to the second environment, the pilot burner apparatus draws air containing an undesired flammable vapor which eliminates the pilot flame, triggering a gas valve to close and shut down the fuel gas supply to the main burner apparatus and the pilot burner apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.