Apparatus and method for sensing flammable vapor
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United States of America Patent
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-
Apr 29, 2003
Issued Date -
N/A
app pub date -
Oct 3, 2000
filing date -
Jan 20, 1998
priority date (Note) -
Expired
status (Latency Note)
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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.
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