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. 01, 2003
Filed:
Apr. 10, 2002
Toshihiro Kobayashi, Nagoya, JP;
Hideo Chikazawa, Nagoya, JP;
Paloma Industries, Limited, Aichi, JP;
Abstract
A main burner , a pilot burner , and a lead-in pipe supplying combustion exhaust to the pilot burner are arranged in a combustion chamber R . A flame arrester with small holes is provided at a bottom plate . Furthermore, a primary thermocouple detecting the flame state of the pilot burner and a secondary thermocouple detecting the temperature in the combustion chamber R are connected in series but with opposite polarities. When the flame arrester clogs up with fine particles, the pilot burner , which sucks in combustion exhaust, performs abnormal combustion before the main burner , which is detected by the primary thermocouple and the secondary thermocouple , whereupon the combustion with the main burner is stopped. Thus, incomplete combustion due to blocking of the air supply path can be prevented.