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Current content: 159 823 134 patent documents

This week's update (15/11/2024 12:00 CET):

143 307 new documents added

1 003 170 documents amended

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EP 2623616 B1 20140910 - Expansion controlled autofrettage

Title (en)

Expansion controlled autofrettage

Title (de)

Autofrettage-Verfahren

Title (fr)

Procédé d'autofrettage

Publication

EP 2623616 B1 20140910 (DE)

Application

EP 12153851 A 20120203

Priority

EP 12153851 A 20120203

Abstract (en)

[origin: EP2623616A1] The method involves applying high pressure of 700 bar at interior (2) of a metal pipe (1). A plastic deformation of metal or of metal wall is occurred from the inner surface (3) of the metal pipe. The pressure is increased gradually during the plasticization treatment. The outer diameter of metal pipe is measured during plasticization treatment. The pressure increasing process is terminated while reaching critical outside diameter of metal pipe, and then pressure is reduced again.

IPC 8 full level

C21D 7/12 (2006.01)

CPC (source: EP)

C21D 7/12 (2013.01)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

EP 2623616 A1 20130807; EP 2623616 B1 20140910; PL 2623616 T3 20150227

DOCDB simple family (application)

EP 12153851 A 20120203; PL 12153851 T 20120203