Apparatus for underground tunneling

Details Apparatus for underground tunneling Apparatus for underground tunneling

1988-09-02

1990-02-06

Taylor, Dennis L.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Boring

299 31, 405138, E21D 908

Patent

active

048984965

ABSTRACT:
The invention relates to an apparatus for underground tunneling. It has a working tube which can be driven in the drilling direction and a digging unit mounted therein, and it has a cutterhead which can be shifted back and forth and radially of the axis of the apparatus. When the cutterhead is not deflected radially, the entire digging unit has a substantially smaller cross section than corresponds to the internal cross section of the working tube. A scoop disposed on the floor of the working tube and provided with a shovel-like mouth at its front end serves for the simple and cost-effective removal of the earth loosened by the cutterhead. The scoop is at first urged forward out of the working tube by means of a drive mechanism in order to shovel up loosened earth, and then it is withdrawn rearwardly out of the working tube, emptied, and run back again into the working tube.

REFERENCES:
patent: 3935910 (1976-02-01), Gaudy et al.
patent: 4077670 (1978-03-01), Spies et al.
patent: 4369002 (1983-01-01), Kostylev et al.
patent: 4407622 (1983-10-01), Ito

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