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. 23, 2021
Filed:
Nov. 07, 2019
Rinnai Corporation, Aichi, JP;
Takahiro Ono, Nagoya, JP;
RINNAI CORPORATION, Aichi, JP;
Abstract
[Problems] A flat burner elongated in the longitudinal direction has, at an upper end thereof, a main burner port () and a flame retention port () positioned at least on laterally one side of the main burner port (). The flat burner uses hydrogen-containing fuel as a fuel. Flash back is prevented at the flame retention port in which the gas ejection speed becomes relatively small. [Solving Means] A lean fuel-air mixture which is leaner in fuel concentration than a theoretical fuel-air ratio is ejected from the main burner port () and a gas containing only fuel is ejected from the flame retention port (). In addition, the height, on the side of the main burner port (), of the upper end of the flame retention port (), is made lower than the height of the upper end of the main burner port ().