EP 0095413 B1 19860416 - PRESTRESSING DUCTS AND METHODS FOR THEIR MANUFACTURE
Title (en)
PRESTRESSING DUCTS AND METHODS FOR THEIR MANUFACTURE
Publication
Application
Priority
FR 8208902 A 19820521
Abstract (en)
[origin: ES279984U] To manufacture a bent prestress conduit (5) adapted to receive without damage cables (7) subjected to extremely high pulling forces, one of the faces of a metal strip (1) is coated intimately with a metal phosphate layer (4) itself covered by a soap and this metal strip is wound in helical form so as to obtain a continuous tube whose inner face is formed by the thus coated face of the metal strip.
IPC 1-7
IPC 8 full level
B21C 37/12 (2006.01); E04C 5/10 (2006.01)
CPC (source: EP US)
B21C 37/126 (2013.01 - EP US); E04C 5/10 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0095413 A2 19831130; EP 0095413 A3 19840912; EP 0095413 B1 19860416; AT E19280 T1 19860515; DE 3363027 D1 19860522; ES 279984 U 19841116; ES 279984 Y 19850601; FR 2527246 A1 19831125; FR 2527246 B1 19850104; US 4606380 A 19860819
DOCDB simple family (application)
EP 83400993 A 19830517; AT 83400993 T 19830517; DE 3363027 T 19830517; ES 279984 U 19830518; FR 8208902 A 19820521; US 74103785 A 19850604