Liquid heaters and vaporizers – Stand boiler – And condition responsive feature
Reexamination Certificate
2006-06-07
2008-10-21
Wilson, Gregory A (Department: 3749)
Liquid heaters and vaporizers
Stand boiler
And condition responsive feature
C122S014210, C122S014200, C236S02100R
Reexamination Certificate
active
07438023
ABSTRACT:
A thermal cut-off circuit for a gas-fired device and method of operating the circuit. The thermal cut-off circuit includes a thermal cut-off switch and an ambient thermal switch. The thermal cut-off switch is positioned in a combustion chamber and the ambient thermal switch is preferably positioned in a flow of air entering the combustion chamber. The thermal cut-off circuit ensures a gas valve is closed upon detecting a possible incomplete combustion in the combustion chamber.
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Hughes Dennis R.
Lee Hyungsik
AOS Holding Company
Michael & Best & Friedrich LLP
Wilson Gregory A
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