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:
Aug. 08, 2017
Filed:
Oct. 16, 2014
Rinnai Corporation, Nagoya-shi, Aichi, JP;
Tadayuki Hiraga, Nagoya, JP;
RINNAI CORPORATION, Nagoya-shi, JP;
Abstract
A tubular burner includes: a mixing tube having an inlet port into which a fuel gas and primary air flow; and a flame hole member having a plurality of flame holes and being fitted into a front end portion of the mixing tube. The flame holes of the flame hole member are made up of a central main flame hole and a plurality of subsidiary flame holes positioned around, and each being smaller than, the central main flame hole. In an annular region of the flame hole member defined between an outer periphery of the flame hole member and the central main flame hole, a plurality of non-flame-hole regions which are free from formation of the subsidiary flame holes are provided at a circumferential distance from one another. The plurality of the subsidiary flame holes are formed in each of flame hole regions defined between the non-flame-hole regions.