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. 18, 2008
Filed:
Apr. 19, 2005
Karine Brand, Illerrieden, DE;
Andreas Knoepfler, Ulm, DE;
Andreas Beutler, Weissenhorn, DE;
Ronald Lutz, Blaubeuren, DE;
Karine Brand, Illerrieden, DE;
Andreas Knoepfler, Ulm, DE;
Andreas Beutler, Weissenhorn, DE;
Ronald Lutz, Blaubeuren, DE;
Wieland-Werke AG, Ulm, DE;
Abstract
The invention relates to a heat-exchanger tube structured on both sides with excellent heat transfer characteristics utilizing both outer and also inner fins and secondary grooves intersecting the inner fins. Two spaced-apart rolling tools are provided in the utilized device in order to form the outer fins of two adjacent rolling tools; the inner structure is formed by two differently profiled mandrels. The first mandrel forms in a first forming area the inner fins. The second mandrel forms in a second forming area the inventive secondary grooves into the earlier created inner fins.