Hard rock trench cutting machine having anchoring and steering s

Details Hard rock trench cutting machine having anchoring and steering s Hard rock trench cutting machine having anchoring and steering s

1980-03-24

1982-01-26

Purser, Ernest R.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Stepper-type advance-causing means

175 94, 175 76, E21D 910

Patent

active

043125417

ABSTRACT:
There is disclosed a hard rock trench cutting machine comprising a main body assembly and a cutting wheel assembly. A cylinder is transversely mounted on the main body assembly and carries a pair of pistons which extend axially from each end of the cylinder. Pads are provided on each piston to bear against the sidewalls of a trench. Each piston has an end face within the cylinder which, together with an inner sidewall of the cylinder, comprises a pressure chamber adapted to force the pads against the trench. The main body and its cylinder are free to move laterally relative to the pistons when the cylinder is pressurized. Extensible arms are provided between the pistons and the main body assembly for forcing the main body assembly and its cutting wheel forwardly to progressively cut a trench. A steering assembly is provided to shift the main body assembly laterally relative to the pistons and about the central axis of the cutting wheel.

REFERENCES:
patent: 2925258 (1960-02-01), Robbins
patent: 3840271 (1974-10-01), Sugden
patent: 3957310 (1976-05-01), Winberg et al.
patent: 4035024 (1977-07-01), Fink
patent: 4189186 (1980-02-01), Synder

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