Patent · US Active

Heat exchanger tube and methods for producing a heat exchanger tube

US9234709B2 · kind B2 · utility

6Cited by

6References

6Claims

0Family size

Assignee

WIELAND-WERKE AG · DE

Inventors

Achim Gotterbarm · Blaustein, DE
Ronald Lutz · Round Rock, US
Andreas Beutler · Weißenhorn, DE

Key dates

Filing date	Dec 8, 2010
Grant date	Jan 12, 2016
Priority date	—
Expiry date	Feb 8, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49391
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A heat exchanger tube with a tube axis, a tube wall, a tube outside and a tube inside. Continuously running, axially parallel or helically circling inner ribs are formed out of the tube wall on the tube inside, each inner rib having two rib flanks and a rib tip. A continuously extending groove is formed between adjacent inner ribs. The rib tip has at regular intervals recurring elevations which have an essentially frustopyramidal form. The inner ribs are raised in the radial direction on the contour line which is defined by the transitional edge of a rib flank to the rib tip and protuberances advancing out of the rib flank are formed in this region. Furthermore, the invention relates to a method for producing a heat exchanger tube.

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