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:
Jun. 13, 2000
Filed:
Jul. 03, 1997
Soichi Kato, Saitama, JP;
Zexel Corporation, Tokyo, JP;
Abstract
A flat tube 2 for a heat exchanger which is formed by bending a single plate or overlaying two plates, wherein long beads 11 in a plurality of rows are previously formed on the plate in the longitudinal direction of the plate, the plate has its surface, to which the respective long beads are opposed, formed flat, the tops of the respective long beads 11 and the flat surface are joined, a plurality of passages 12 for a medium are formed within the tube by long beads and the flat surface, sections at the tube ends to be inserted into the header tanks 3, 4 are pressed back to be flat to form tube insertion sections, and a wall relief, which is formed to protrude in the breadth direction of the tube when the tube insertion sections are formed, is used as a stopper 16 to restrict a tube insertion level.