Liquid heaters and vaporizers – Stand boiler – And condition responsive feature
Reexamination Certificate
2007-01-16
2007-01-16
Wilson, Gregory (Department: 3749)
Liquid heaters and vaporizers
Stand boiler
And condition responsive feature
C122S014200, C431S080000
Reexamination Certificate
active
10991804
ABSTRACT:
A fuel-fired water heater has main and pilot burners disposed in its combustion chamber. All of the primary combustion air utilized by the main and pilot burners during firing thereof is supplied thereto via an enclosed path extending to the burners from outside of the combustion chamber. A burner clogging detection system is operative to shut down further combustion, upon sensing a condition of the pilot burner flame indicative of a predetermined degree of pilot burner clogging, prior to the main burner being clogged to an unacceptable degree by particulate matter entrained in incoming combustion air being delivered to the main burner.
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May 26, 2005 New Zealand Examination Report.
Haynes and Boone LLP
Rheem Manufacturing Company
Wilson Gregory
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