Patent · US Active

Heat exchanger tube and method for producing it

US8899308B2 · kind B2 · utility

1Cited by

10References

3Claims

0Family size

Assignee

WIELAND-WERKE AG · DE

Inventors

Andreas Beutler · Weißenhorn, DE
Jean El Hajal · Ulm, DE
Ronald Lutz · Round Rock, US

Key dates

Filing date	Nov 20, 2009
Grant date	Dec 2, 2014
Priority date	—
Expiry date	Jul 4, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49382
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A heat exchanger tube with a tube axis and with a tube wall having a tube outside and a tube inside, axially parallel or helically encircling inner ribs, with a groove which lies in each case between adjacent inner ribs, being formed from the tube wall on the tube inside, the helix angle, measured with respect to the tube axis, of the inner ribs being smaller than or equal to 45°, the region of the inner ribs which is remote from the tube wall being deformed at regular intervals asymmetrically on one side essentially in the tube circumferential direction, the deformed material of the inner ribs forming protrusions above the groove, the protrusions extending in each case over a finite deformation zone along an inner rib, the markedness of the deformation changing continuously within the deformation zone.

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