Liquid heaters and vaporizers – Stand boiler
Reexamination Certificate
2007-03-15
2009-10-20
Wilson, Gregory A (Department: 3749)
Liquid heaters and vaporizers
Stand boiler
C122S018300
Reexamination Certificate
active
07603967
ABSTRACT:
A water heater including a water container, a combustion chamber adjacent the water container, a burner associated with the combustion chamber, a blower located to receive combustion products generated by the burner, an intake air conduit connected to the combustion chamber and having a combustion air intake opening, a dilution air conduit connected to the blower and having a dilution air intake opening; and a flammable vapor sensor having at least an operative portion positioned in the blower or the dilution air conduit.
REFERENCES:
patent: 6622661 (2003-09-01), Hotton
patent: 6626133 (2003-09-01), Schell et al.
patent: 6662661 (2003-12-01), Stach et al.
patent: 6722876 (2004-04-01), Abraham et al.
patent: 6766771 (2004-07-01), Hotton
patent: 6973819 (2005-12-01), Ruhland et al.
patent: 7112059 (2006-09-01), Donnelly
patent: 7159540 (2007-01-01), Garrabrant et al.
patent: 7290502 (2007-11-01), Kidd et al.
American Water Heater Company
Michael & Best & Friedrich LLP
Wilson Gregory A
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