EP 0175743 B1 19880608 - METHOD OF MANUFACTURING HAIRPIN CONFIGURED TUBES
Title (en)
METHOD OF MANUFACTURING HAIRPIN CONFIGURED TUBES
Publication
Application
Priority
US 58993284 A 19840314
Abstract (en)
[origin: WO8504242A1] An integrally formed hairpin configured metallic tube, comprising two parallel leg portions (2, 2') of oblong cross-section connected together by an U-shaped bend portion (3) of substantially circular cross-section. A method of manufacturing hairpin tubes includes the steps of providing a tubular member with a substantially circular cross-section, bending said tubular member to an U-shaped hairpin tube with two parallel leg portions, and subsequent radial deformation of the leg portions to an oblong cross-section.
IPC 1-7
IPC 8 full level
B21C 37/28 (2006.01); B21D 7/00 (2006.01); F28D 7/06 (2006.01); F28F 1/00 (2006.01); F28F 1/02 (2006.01)
CPC (source: EP)
B21C 37/283 (2013.01); F28D 7/06 (2013.01)
Citation (examination)
DE 2952736 A1 19810702 - SUEDDEUTSCHE KUEHLER BEHR [DE]
Designated contracting state (EPC)
AT BE CH DE FR GB LI LU NL SE
DOCDB simple family (publication)
WO 8504242 A1 19850926; BR 8505815 A 19860325; DE 3563263 D1 19880714; EP 0175743 A1 19860402; EP 0175743 B1 19880608; JP H0684173 U 19941202; JP S61501467 A 19860717
DOCDB simple family (application)
NO 8500015 W 19850312; BR 8505815 A 19850312; DE 3563263 T 19850312; EP 85901607 A 19850312; JP 33194 U 19940202; JP 50120385 A 19850312