EP 0780173 A3 19981021 - Method of manufacturing a pipe section, particularly a branch pipe manifold and branch pipe manifold produced thereby

Title (en)

Method of manufacturing a pipe section, particularly a branch pipe manifold and branch pipe manifold produced thereby

Title (de)

Verfahren zur Herstellung einen Rohrteiles, insbesondere einer Krümmer-Rohrabzweigung einer Kraftfahrzeug-Abgasanlage, sowie eine hiernach gefertigte Krümmer-Rohrabzweigung

Title (fr)

Procédé de fabrication d'une section de tuyau, notamment d'un embranchement de convertisseur et embranchement de convertisseur ainsi fabriqué

Publication

EP 0780173 A3 19981021 (DE)

Application

EP 96119402 A 19961204

Priority

DE 19548224 A 19951222

Abstract (en)

[origin: EP0780173A2] The branch has a ready-bent roll part with two short edges in its central contact area (7), which are welded via a seam on its face. It can also have a short and a long edge which are welded laterally to one another via a throat seam. The roll part in its central contact area inter-engages box-fashion and is welded by means of a throat seam. The intermediate area between a straight pipe section (2) and a lateral pipe branch (3) tightly engages and has a closed contour provided with a welding seam. The roll part is double-walled.

IPC 1-7

B21D 53/88; F01N 7/18

IPC 8 full level

B21C 37/08 (2006.01); B21C 37/29 (2006.01); B21D 53/88 (2006.01); F01N 13/18 (2010.01)

CPC (source: EP)

B21C 37/0803 (2013.01); B21C 37/29 (2013.01); B21D 53/88 (2013.01); F01N 13/18 (2013.01); F01N 2450/22 (2013.01)

Citation (search report)

[X] FR 1327091 A 19630517 - NEYRPIC ATELIERS NEYRET BEYLIE
[X] BE 373874 A
[A] DE 4113855 A1 19920820 - BAYERISCHE MOTOREN WERKE AG [DE]
[A] US 1830262 A 19311103 - CARLSON HJALMAR G
[A] FR 761992 A 19340331 - CIE NAT RADIATEURS
[A] US 2713195 A 19550719 - HEMMER ANTON V
[A] EP 0321869 A1 19890628 - NISSAN MOTOR [JP]
[A] PATENT ABSTRACTS OF JAPAN vol. 002, no. 152 (C - 031) 20 December 1978 (1978-12-20)

Designated contracting state (EPC)

DE FR GB IT

DOCDB simple family (publication)

EP 0780173 A2 19970625; EP 0780173 A3 19981021; DE 19548224 A1 19970626

DOCDB simple family (application)

EP 96119402 A 19961204; DE 19548224 A 19951222