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. 19, 2019
Filed:
Jun. 21, 2016
Applicant:
Rinnai Corporation, Nagoya-shi, Aichi, JP;
Inventor:
Takashi Ojiro, Nagoya, JP;
Assignee:
Rinnai Corporation, Nagoya-shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F24H 8/00 (2006.01); F23K 5/00 (2006.01); F16L 55/00 (2006.01); F23L 5/02 (2006.01); F24H 1/14 (2006.01); F23L 13/02 (2006.01); F24H 9/20 (2006.01); F23D 14/82 (2006.01); F24H 9/18 (2006.01);
U.S. Cl.
CPC ...
F24H 8/006 (2013.01); F16L 55/00 (2013.01); F23D 14/825 (2013.01); F23K 5/00 (2013.01); F23L 5/02 (2013.01); F23L 13/02 (2013.01); F24H 1/145 (2013.01); F24H 9/2042 (2013.01); F23D 2209/10 (2013.01); F24H 9/1836 (2013.01); Y02B 30/106 (2013.01);
Abstract
A water heater includes a vessel () provided with a burner () having a downward combustion surface, a fan casing () accommodating a fan () for supplying a mixture gas of primary combustion air and fuel gas to the burner, an annular packing connecting a first connection end surface at a downstream end of a first passage forming a downstream-side passage of the fan casing with a second connection end surface at an upstream end of a second passage forming an upstream-side passage of the vessel in airtight state, and a check valve () disposed near the upstream end in the second passage ().