Tunnel drilling machine or tube-driving machine

Details Tunnel drilling machine or tube-driving machine Tunnel drilling machine or tube-driving machine

1995-04-05

1996-11-19

Bagnell, David J.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Stepper-type advance-causing means

175376, 299 55, E21D 910, E21B 1012

Patent

active

055755372

ABSTRACT:
The tunnel drilling machine or tube-driving machine for hard rock drilling has a drill head (19) supporting drilling tools (1 to 18) which has a diameter which is less than the diameter of the bore. The geometric axis of the circle of the envelope of the tools of the full-width drill head (19) is disposed eccentrically in relation to the linear tunnel axis (22) or the axis of rotation (21) or can be displaced.

REFERENCES:
patent: 3041055 (1962-06-01), Risse
patent: 4043600 (1977-08-01), Dyer
patent: 4624605 (1986-11-01), Akesaka

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