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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 10465944 B1

PDFFull Text
Date of Patent:
Nov. 05, 2019

Filed:

Feb. 14, 2018

Heat exchanger and production method of the heat exchanger

Applicant:

Noritz Corporation, Hyogo, JP;

Inventors:

Shoji Okuda, Kobe, JP;

Hideyuki Fujisawa, Kobe, JP;

Assignee:

NORITZ CORPORATION, Hyogo, JP;

Attorney:

Studebaker & Brackett PC

Primary Examiner:

Henry T Crenshaw

Assistant Examiner:

Kamran Tavakoldavani

Int. Cl.
CPC ...
F28D 7/10 (2006.01); F24H 9/12 (2006.01); B21D 39/06 (2006.01); F28F 1/02 (2006.01); F28F 9/08 (2006.01); F28F 9/14 (2006.01); B21D 53/08 (2006.01); B21D 53/02 (2006.01); F24H 1/40 (2006.01); F28F 9/02 (2006.01); F28F 9/18 (2006.01); F28D 7/16 (2006.01); F28D 21/00 (2006.01); F24H 9/00 (2006.01); B21D 39/20 (2006.01);
U.S. Cl.
CPC ...
F24H 9/122 (2013.01); B21D 39/06 (2013.01); B21D 53/02 (2013.01); B21D 53/08 (2013.01); F24H 1/40 (2013.01); F24H 9/0015 (2013.01); F24H 9/0026 (2013.01); F28D 7/1623 (2013.01); F28D 21/0007 (2013.01); F28F 1/025 (2013.01); F28F 9/0224 (2013.01); F28F 9/08 (2013.01); F28F 9/14 (2013.01); F28F 9/182 (2013.01); B21D 39/20 (2013.01); F28F 9/0229 (2013.01); F28F 2240/00 (2013.01); F28F 2275/125 (2013.01);
Abstract

A heat transfer tube of a heat exchanger is provided with a first and a second annular convex portions of which outer diameters are partially expanded. The first annular convex portion is positioned on an inner face side of a side plate portion of a case of the heat exchanger and is engaged with a circumferential edge portion of a first hole portion provided for the side plate portion, or the first annular convex portion contacts under pressure with an inner circumferential face of the first hole portion. The second annular convex portion is positioned on an outer face side of a header constituting member and is engaged with a circumferential edge portion of a second hole portion. Thus the side plate portion, the heat transfer tube, and a header are relatively fixed by a simple means.

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