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:
Mar. 22, 1988
Filed:
Jan. 21, 1987
Nippondenso Co., Ltd., Kariya, JP;
Furukawa Aluminum Co., Ltd., Tokyo, JP;
Abstract
A method of producing a lightweight and corrosion-resistant heat exchanger is disclosed. An aluminum tube with a plurality of passage bores therein is formed by extrusion. A layer of a brazing material comprising an aluminum alloy having an electrode potential value lower than that of the tube material is formed on the tube surface with the aid of a non-corrosive flux. The tube is bent into a zigzag winding form so as to have a plurality of substantially parallel runs. Corrugated fin members of aluminum or aluminum alloy are placed between respective adjacent runs of the tube. The tube and the fin members are heated together up to the melting point of the brazing material so that they are bonded together by the brazing material to form the heat exchanger.