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:
Nov. 09, 1999
Filed:
Jan. 15, 1998
Soichi Kato, Saitama, JP;
Muneo Sakurada, Saitama, JP;
Shin Kurihara, Saitama, JP;
Sadao Haiya, Saitama, JP;
Takashi Sugita, Saitama, JP;
Shoji Akiyama, Saitama, JP;
Takahumi Umehara, Saitama, JP;
Zexel Corporation, Tokyo, JP;
Abstract
A heat exchanger that a tube member 2' has beads 21 protruded from the face of one plate toward the other plate, tube member 2' is held by block members 31, 31, a forming jig 40 is inserted between medium passages 24, 24 formed by the beads 21 to hold to press the beads 21 at an end 2a of the tube member 2' to mutually adhere the faces of the beads 21 on the outer face of the tube member 2', and recesses formed by the mutually contacted faces of the beads 21, 21 have a cross-sectional area of about 0.2 mm.sup.2 or below. And, a region where the recesses have a cross-sectional area of about 0.2 mm.sup.2 or below is within 10 mm outside header pipes 3, 4.