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:
Feb. 03, 2004
Filed:
Jun. 20, 2002
Applicant:
Inventors:
Shigetoshi Jogan, Kishiwada, JP;
Kiyoshi Tada, Neyagawa, JP;
Assignee:
Showa Denko, K.K., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B 1/504 ; B32B 1/508 ; B32B 1/520 ; F28F 1/00 ; F16J 1/500 ;
U.S. Cl.
CPC ...
B32B 1/504 ; B32B 1/508 ; B32B 1/520 ; F28F 1/00 ; F16J 1/500 ;
Abstract
A cooling plate provided with a cooling medium passage therein is formed by integrally joining a plurality of metal plates each having a cooling medium passage forming groove on a joining surface thereof. An anodic oxide film is formed on at least the cooling medium passage forming groove on the joining surface, and the plurality of metal plates are integrally joined each other by a friction agitation joining method. This enhances corrosion resistance of the cooling medium passage, resulting in an improved durability and extended life, which enables uniform cooling performance.