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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.:

US 9945581 B1

PDFFull Text
Date of Patent:
Apr. 17, 2018

Filed:

Jun. 25, 2015

Water heater

Applicant:

Noritz Corporation, Hyogo, JP;

Inventors:

Yu Fujimoto, Kakogawa, JP;

Norihide Wada, Akashi, JP;

Assignee:

NORITZ CORPORATION, Hyogo, JP;

Attorney:

Studebaker & Brackett PC

Primary Examiner:

Alissa Tompkins

Assistant Examiner:

Benjamin W Johnson

Int. Cl.
CPC ...
F22B 15/00 (2006.01); F23L 17/00 (2006.01); F24H 1/14 (2006.01); F23L 9/00 (2006.01); F23D 14/04 (2006.01); F23D 14/58 (2006.01);
U.S. Cl.
CPC ...
F24H 1/145 (2013.01); F22B 15/00 (2013.01); F23D 14/045 (2013.01); F23D 14/586 (2013.01); F23L 9/00 (2013.01); F24H 2210/00 (2013.01);
Abstract

A water heater includes a burner of a premixed type, a heat exchanger, and a fan suctioning combustion gas and exhausting combustion gas to the outside. The burner includes a burner case partitioned into a combustion chamber and a gas introduction chamber by a partition plate and a plurality of combustion tubes arranged in the combustion chamber. An air supply opening for supplying air into the gas introduction chamber is provided in the burner case. The partition plate has a plurality of opening portions communicating with the inside of the combustion tubes and a plurality of through holes communicating with the outside of the combustion tubes within the combustion chamber. The air supply opening is constructed to have an opening area smaller than the total sum of the total of opening areas of the plurality of opening portions and the total of opening areas of the plurality of through holes.

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Fujimoto, Yu. (2018). Water heater (U.S. Patent No. 9945581). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9945581

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