Tunnelling head and method

Details Tunnelling head and method Tunnelling head and method

1994-07-27

1995-11-28

Bagnell, David J.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Rotary cutter head with advance direction coincident or...

299 68, 405143, E21D 908

Patent

active

054701325

ABSTRACT:
A micro tunnelling head and earth boring method is illustrated which includes utilizing a cutting head (G) spaced forwardly of a cylindrical articulated housing (A) having a transverse bulkhead (B) intermediate its ends for carrying a centrally disposed tube (C) carrying a driven auger (F) for operating the cutting head and removing the spoil inwardly from the housing through a chamber (D) which receives cuttings through a passageway (E) provided therein. Steering mechanism includes circumferentially spaced fluid operated cylinder assemblies (I) for pivotal fixation on adjacent ends of the articulated connection between the cylindrical housing (A) and a forward end of a casing for facilitating steering.

REFERENCES:
patent: 2756037 (1956-07-01), Kirkpatrick
patent: 4629255 (1986-12-01), Babendererde
patent: 4655493 (1987-04-01), Sumi
patent: 5072992 (1991-12-01), Gurbunov et al.

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