The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 06, 2004
Filed:
Jul. 22, 2002
Gordon W. Stretch, Oxnard, CA (US);
Bruce A. Hotton, Montgomery, AL (US);
John H. Scanlon, Montgomery, AL (US);
Gary A. Elder, Montgomery, AL (US);
James T. Campbell, Wetumpka, AL (US);
Larry D. Kidd, Nashville, MI (US);
Eric M. Lannes, Kentwood, MI (US);
James M. Martin, East Greenwich, RI (US);
James W. Mears, Warwick, RI (US);
Thomas E. Archibald, Providence, RI (US);
The Water Heater Industry Joint Research and Development Consortium, Rio Verde, AZ (US);
Abstract
A gas-fired water heater has a combustion chamber with a bottom wall defined by a perforated flame arrestor plate forming a portion of a flow path through which combustion air may be supplied to a burner structure within the combustion chamber. During firing of the water heater a combustion air shutoff system having a heat-frangible temperature sensing structure disposed within the combustion chamber senses an undesirable temperature increase in the combustion chamber, caused by for example a partial blockage of the flow path, and responsively terminates further air flow into the combustion chamber, thereby shutting down the burner, prior to the creation in the combustion chamber of a predetermined elevated concentration of carbon monoxide.