Patent · US Expired

Method of manufacture of heat-exchanger tube structured on both sides

US7451542B2 · kind B2 · utility

5Cited by

1References

16Claims

0Family size

Assignee

WIELAND-WERKE AG · DE

Inventors

Karine Brand · Illerrieden, DE
Andreas Knoepfler · Ulm, DE
Andreas Beutler · Weißenhorn, DE
Ronald Lutz · Round Rock, US

Key dates

Filing date	Apr 19, 2005
Grant date	Nov 18, 2008
Priority date	—
Expiry date	Mar 3, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49391
WIPO fieldThermal processes and apparatus
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.