EP 0298832 B1 19920916 - METHOD AND APPARATUS FOR FORMING A CORRUGATED TUBE BY HAMMERING AND ITS APPLICATION TO TUBES FOR THE AUTOMOBILE INDUSTRY
Title (en)
METHOD AND APPARATUS FOR FORMING A CORRUGATED TUBE BY HAMMERING AND ITS APPLICATION TO TUBES FOR THE AUTOMOBILE INDUSTRY
Publication
Application
Priority
FR 8709408 A 19870702
Abstract (en)
[origin: US4852380A] A shaping device for corrugating a tube includes at least one mandrel which is radially expansible and has a body associated with at least one relatively resilient arm which carries on its surface an impression whose profile corresponds to the profile of the corrugation to be obtained, and an axially movable locking member for causing the mandrel to move from a retracted position to an outer position in which the locking member immobilizes the mandrel, and hammers. The hammers, the tube and the mandrel-locking member are adapted to be subjected to relative rotations about their common longitudinal axis.
IPC 1-7
IPC 8 full level
B21D 15/06 (2006.01)
CPC (source: EP US)
B21D 15/06 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE ES GB IT NL SE
DOCDB simple family (publication)
EP 0298832 A1 19890111; EP 0298832 B1 19920916; DE 3874636 D1 19921022; DE 3874636 T2 19930304; ES 2034314 T3 19930401; FR 2617415 A1 19890106; FR 2617415 B1 19910809; US 4852380 A 19890801
DOCDB simple family (application)
EP 88401657 A 19880628; DE 3874636 T 19880628; ES 88401657 T 19880628; FR 8709408 A 19870702; US 21322888 A 19880629