EP 1013874 A3 20001227 - Device and method for the replacement of tubes
Title (en)
Device and method for the replacement of tubes
Title (de)
Vorrichtung und Verfahren zum Ersetzen von Rohren
Title (fr)
Dispositif et procédé pour le remplacement des tuyaux
Publication
Application
Priority
DE 19859928 A 19981223
Abstract (en)
[origin: EP1013874A2] To renew a pipe conduit laid underground (4), a protective pipe (5) is installed before the old pipe section is removed. The protective pipe has an inner cross-section greater than the outer cross-section of the old pipe section. The protective pipe at its front side has an advance drive head (6) with an inner and/or outer front section (7). The advance drive head at a position behind the front end has an inwardly extending cutting edge for destruction of the old pipe section (3). The protective pipe is connected with a flushing ring which has inwardy directed flushing apertures.
IPC 1-7
IPC 8 full level
E21B 7/20 (2006.01); E21B 29/10 (2006.01)
CPC (source: EP)
E21B 7/20 (2013.01); E21B 29/10 (2013.01)
Citation (search report)
- [X] US 5096000 A 19920317 - HESSE ALFONS [DE]
- [XY] DE 3938765 A1 19910529 - BILFINGER BERGER BAU [DE]
- [X] DE 19522579 C1 19960725 - BERLINER WASSER BETRIEBE [DE]
- [Y] US 5173009 A 19921222 - MORIARTY MARTIN [IE]
- [PX] DE 29822944 U1 19990930 - LUDWIG PFEIFFER HOCH UND TIEFB [DE]
- [X] GAEBELEIN W: "NEUENTWICKLUNG IN DER GRABENLOSEN AUSWECHSLUNG VON TRINKWASSER- HAUSANSCHLUSSLEITUNGEN AUS STAHL UND BLEI NEW DEVELOPMENTS IN NON-DIGGING REPLACEMENT OF STEEL AND LEAD DOMESTIC DRINKING WATER SERVICE PIPING", 3R INTERNATIONAL,DE,VULKAN-VERLAG, ESSEN, vol. 35, no. 1, 1996, pages 39 - 44, XP000641691, ISSN: 0340-3386
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 1013874 A2 20000628; EP 1013874 A3 20001227; DE 19859928 C1 20000831; PL 337421 A1 20000703
DOCDB simple family (application)
EP 99125536 A 19991221; DE 19859928 A 19981223; PL 33742199 A 19991223