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 6880628 B1

PDF
Full Text
Expired
Date of Patent:
Apr. 19, 2005

Filed:

Feb. 05, 2002
Applicants:

Kazue Yoshida, Tokyo, JP;

Hiroki Yoshioka, Tokyo, JP;

Inventors:

Kazue Yoshida, Tokyo, JP;

Hiroki Yoshioka, Tokyo, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F28F003/00 ;
U.S. Cl.
CPC ...
Abstract

A plurality of heat transfer tube elementsare laminated with outer fins disposed between the heat transfer tube elementsin order to form a core. A gas flows between the outer fins. A passageallowing flow of a cooling medium in a direction orthogonal to the direction of gas flow is formed in each heat transfer tube element. The passagehas a large passagehaving a large width disposed upstream with respect to the direction a of gas flow and a small passage groupcomprising a plurality of small passagesbeing more narrow than the large passageand being disposed downstream with respect to the direction of gas flow. This arrangement allows non-uniformity in the temperature distribution of a gas flow to be suppressed to a low level with a downsizing, low-weight and low-cost device.


Find Patent Forward Citations

Yoshida, Kazue. (2005). Heat exchanger for fuel cell system (U.S. Patent No. 6880628). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6880628

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