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:
Apr. 18, 2000
Filed:
Jul. 23, 1998
Akinori Yoshida, Tokyo, JP;
Yoshinori Kondo, Tokyo, JP;
Seiichi Kato, Kariya, JP;
Tetsuya Yamamoto, Kariya, JP;
Tsuguharu Shimpo, Kariya, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Denso Corporation, Aichi-ken, JP;
Abstract
There is disclosed an Al alloy composite tube for refrigerant passages, made by extruding, or extruding and drawing a two-layer composite pipe obtained by shrink-fit of a tubular Al alloy inner material to the inside of a tubular Al alloy core, or a three-layer composite pipe obtained by shrink-fit of the two-layer composite pipe to the inside of a tubular Al alloy outer material; and a method for producing the same. This Al alloy composite tube for refrigerant passages causes less blisters at the interface between an inner pipe and an outer pipe, and can prevent debonding of the inner pipe.