Gas burner controller with main valve delay after pilot flame lightoff
US5538416A · kind A · utility
12Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1995 |
| Grant date | Jul 23, 1996 |
| Priority date | — |
| Expiry date | Feb 27, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23N2239/06
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A controller for a gas burner system compensates for the tendency of a flame rod sensor in the burner system to on occasion provide a spike in its signal on first lightoff of a pilot flame, by delaying the signal which causes opening of the burner system's main burner valve until the sensor signal has had a chance to reach to its normal level indicative of the presence of the pilot flame. This time varies from about 5 to 30 seconds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.