Heat exchanger having a welded pipe which has a reduced wall thickness at location of the weld seam

US5669440A · kind A · utility

Assignee

• Behr GmbH & Co. · DE

Inventors

• Dieter Bauer · Munich, DE
• Ralf Bochert · Waiblingen, DE
• Herbert Damsohn · Esslingen am Neckar, DE
• Werner Helms · Eßlingen, DE
• Roland Hemminger · Eßlingen, DE
• Herbert Hunzelmann · Marxzell, DE
• Volker Kurz · Stuttgart, DE
• Roland Schirrmacher · Gräfelfing, DE
• Walter Wolf · Backnang, DE

Key dates

• Filing date: Dec 22, 1995
• Grant date: Sep 23, 1997
• Expiry date: Dec 22, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49391
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A heat exchanger, produced by the insertion of welded pipes into a rib pack, has a good connection between the rib pack and the pipes after expansion of the pipes. An optimal contact of the pipes against the passages in the cooling fins of the rib pack is achieved because the weld base of the welded pipe lies in a recess. The recess is formed by reduction of the wall thickness of a strip material from which the welded pipe is produced.