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:
Nov. 02, 2010
Filed:
Apr. 17, 2007
Yoshihiko Takasu, Nagoya, JP;
Hideo Okamoto, Nagoya, JP;
Yoshihiko Takasu, Nagoya, JP;
Hideo Okamoto, Nagoya, JP;
Rinnai Corporation, Nagoya-Shi, JP;
Abstract
Provided is a combustion apparatus that can positively prevent a combustible gas present in the vicinity from catching fire in performing prepurge, which involves exhausting air from a combustion chamber provided with a burner, before igniting the burner. The combustion apparatuscontains combustion control meansthat ignites the burner after performing prepurge by use of a fan, and gas detection meansthat is provided between an air supply portand the fanand detects the concentration of a combustible gas. The combustion control meansascertains, before starting the prepurge, whether a combustible gas of a preset maximum concentration or higher is detected by use of the gas detection means(STEP) and prohibits the prepurge by prohibiting the energization of the fanwhen a combustible gas of the maximum concentration or higher has been detected (STEP).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile