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:
Oct. 21, 2008
Filed:
Jun. 07, 2006
Applicants:
Hyungsik Lee, Mequon, WI (US);
Dennis R. Hughes, Hartford, WI (US);
Inventors:
Hyungsik Lee, Mequon, WI (US);
Dennis R. Hughes, Hartford, WI (US);
Assignee:
AOS Holding Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F23N 1/08 (2006.01);
U.S. Cl.
CPC ...
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.