Global Patent Index - EP 0122103 A1

EP 0122103 A1 19841017 - Machine for boring tunnels.

Title (en)

Machine for boring tunnels.

Title (de)

Tunnelbohrmaschine.

Title (fr)

Perforatrice pour tunnels.

Publication

EP 0122103 A1 19841017 (EN)

Application

EP 84302245 A 19840402

Priority

GB 8309356 A 19830406

Abstract (en)

A machine for boring tunnels comprises concentric outer and inner sleeves (2, 4) between the forward extents of which is defined an annular housing (6). A spiral auger (8) extends axially through the inner sleeve (4) and carries at its forward end a primary cutting head (10), while an annular secondary cutting head (14) is mounted in the annular housing (6) and is rotatable about the central axis of the sleeves (2, 4) on rotation of the auger (8). A series of steering plates (20) are snaced circumferentially about the forward extent of the outer sleeve (2) and are pivotal outwardly of said sleeve (2) on actuation of asasociated control members (22) to control the direction of movement of the machine on thrusting of said machine through the ground by an associated thrust mechanism reacting against the rear ends of the sleeves (2, 4) and providing power for rotating the auger (8) and associated cutting head (10, 14).

IPC 1-7

E21D 9/10

IPC 8 full level

E21B 7/06 (2006.01); E21B 7/20 (2006.01); E21D 9/10 (2006.01); E21D 9/11 (2006.01); E21D 9/12 (2006.01)

CPC (source: EP)

E21B 7/062 (2013.01); E21B 7/201 (2013.01); E21D 9/1093 (2013.01); E21D 9/112 (2013.01); E21D 9/124 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH DE FR GB IT LI LU NL SE

DOCDB simple family (publication)

EP 0122103 A1 19841017; GB 8309356 D0 19830511

DOCDB simple family (application)

EP 84302245 A 19840402; GB 8309356 A 19830406