EP 0157506 A1 19851009 - Improvements in or relating to the production of concrete pipes.
Title (en)
Improvements in or relating to the production of concrete pipes.
Title (de)
Herstellung von Betonrohren.
Title (fr)
Fabrication des tubes en béton.
Publication
Application
Priority
GB 8406425 A 19840312
Abstract (en)
The invention provides a method of manufacturing a concrete pipe or tube comprising the steps of forming a mould from flexible material, introducing concrete into the mould so as to form a concrete pipe or tube therein, and introducing a fluid under pressure between the flexible mould and the concrete pipe or tube such as to expand the flexible mould from the pipe or tube and then withdrawing the pipe or tube from within the mould.
IPC 1-7
IPC 8 full level
B28B 7/12 (2006.01); B28B 21/76 (2006.01); B28B 21/90 (2006.01)
CPC (source: EP)
B28B 7/12 (2013.01); B28B 21/76 (2013.01); B28B 21/90 (2013.01)
Citation (search report)
- DD 150022 A1 19810812 - STIEGLER THEO
- GB 1573271 A 19800820 - SCHLOSSER & CO GMBH
- AT 366313 B 19820413 - ETERNIT WERKE HATSCHEK L [AT]
- DE 2611293 A1 19760930 - KURIMOTO HUME PIPE LTD
- US 2612673 A 19521007 - BILLNER KARL P
Designated contracting state (EPC)
AT BE CH DE FR IT LI LU NL SE
DOCDB simple family (publication)
EP 0157506 A1 19851009; AU 3975885 A 19850919; DK 109685 A 19850913; DK 109685 D0 19850311; GB 2155397 A 19850925; GB 2155397 B 19870121; GB 8406425 D0 19840418; GB 8506028 D0 19850411; JP S612511 A 19860108; NO 850981 L 19850913
DOCDB simple family (application)
EP 85301608 A 19850308; AU 3975885 A 19850312; DK 109685 A 19850311; GB 8406425 A 19840312; GB 8506028 A 19850308; JP 4920885 A 19850312; NO 850981 A 19850312