Title (en)

METHOD AND BORING RAM FOR LAYING SERVICE LINES WITHOUT EXCAVATION

Publication

EP 0353442 A3 19910130 (DE)

Application

EP 89111259 A 19890621

Priority

DE 3826513 A 19880804

Abstract (en)

[origin: EP0353442A2] In a method for laying service lines in the ground without excavation by means of a boring ram (1, 101, 201), old lines (6, 106, 206) lying in the ground are replaced with new service lines without having to rip up the ground or destroy the old line (6, 106, 206) in the ground, and it is possible to lay the new line accurately in a precise position when the boring ram (1, 101, 201) has a guiding bore (5, 105, 205) extending axially through the ram housing (2) and is guided on the old line (6, 106, 206). <IMAGE>

IPC 1-7

E21B 7/26; E21B 7/28; E21B 7/20

IPC 8 full level

E21B 4/14 (2006.01); E21B 4/16 (2006.01); E21B 7/26 (2006.01); E21B 7/30 (2006.01)

CPC (source: EP US)

E21B 4/145 (2013.01 - EP US); E21B 4/16 (2013.01 - EP US); E21B 7/30 (2013.01 - EP US)

Citation (search report)

• [Y] GB 2085670 A 19820428 - ELECTRIC POWER RES INST
• [Y] DE 3818998 A1 19891214 - SCHMIDT PAUL [DE]
• [Y] DE 3902081 C1 19890727
• [A] US 4176985 A 19791204 - CHERRINGTON MARTIN D [US]
• [A] US 4410053 A 19831018 - MASSE ROGER F [CA]
• [A] US 4883133 A 19891128 - FLETCHER GERALD L [IN], et al
• [A] US 4749050 A 19880607 - RITTER LESTER L [US]
• [A] US 4593772 A 19860610 - KELLEY DOUGLAS P [US]
• [A] US 4422800 A 19831227 - PARISH ROBERT O [US]
• [AD] DE 2824915 A1 19791220 - SCHMIDT PAUL

Designated contracting state (EPC)

BE CH FR GB IT LI NL

DOCDB simple family (publication)

EP 0353442 A2 19900207; EP 0353442 A3 19910130; EP 0353442 B1 19940202; DE 3826513 A1 19900208; DE 3826513 C2 19900816; JP H0270883 A 19900309; US 5096000 A 19920317

DOCDB simple family (application)

EP 89111259 A 19890621; DE 3826513 A 19880804; JP 20017689 A 19890801; US 36192389 A 19890606