Global Patent Index - EP 0133687 A3

EP 0133687 A3 19860917 - METHOD AND APPARATUS FOR EXPANDING HEAT EXCHANGER TUBES

Title (en)

METHOD AND APPARATUS FOR EXPANDING HEAT EXCHANGER TUBES

Publication

EP 0133687 A3 19860917 (EN)

Application

EP 84109179 A 19840802

Priority

JP 14399583 A 19830805

Abstract (en)

[origin: EP0133687A2] A heat exchanger tube is expanded externally, for instance for connecting it with a plate perimetrically of a hole in the plate through which it passes, by forcing through the bore of the tube a series of at least two expanders of progressively larger size. These expanders are secured on a tool steel rod so far apart from one another than before a trailing expander engages in the bore of the tube, the expander which led it has already emerged from the far end of the tube.

IPC 1-7

B21D 53/08

IPC 8 full level

B21D 39/08 (2006.01); B21D 53/08 (2006.01)

CPC (source: EP)

B21D 53/085 (2013.01)

Citation (search report)

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 0133687 A2 19850306; EP 0133687 A3 19860917; JP S6033837 A 19850221

DOCDB simple family (application)

EP 84109179 A 19840802; JP 14399583 A 19830805