Longwall cutting machines with drum moved by plural power means

Details Longwall cutting machines with drum moved by plural power means Longwall cutting machines with drum moved by plural power means

1979-02-06

1980-09-23

Purser, Ernest R.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Sidewall-working

299 89, E21C 2724

Patent

active

042239508

ABSTRACT:
This invention relates to a mineral-cutting machine, the overall length of which can be substantially reduced, comprising a body and a ranging arm mounted for pivotal movement with respect to the body. A cutting device is supported on the ranging arm for rotation about an axis extending away from the ranging arm in a direction transverse to the intended direction of movement of the machine during a cutting operation. The cutting device is normally in a position at least partly beyond an end of the body during a cutting operation, and means are provided for moving the cutting device from said normal position at least partly beyond an end of the body to a position where it is at least substantially wholly alongside of the body.

REFERENCES:
patent: 3418023 (1968-12-01), Webster
patent: 4027918 (1977-06-01), Hujimori

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