Mining machines

Details Mining machines Mining machines

1976-11-05

1978-08-15

Purser, Ernest R.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Rotary cutter head with advance direction coincident or...

299 12, 299 64, 299 71, 299 90, E21C 2506

Patent

active

041068157

ABSTRACT:
A mining machine adapted to be driven forwardly towards a working face comprises one or more cutting booms projecting forwardly from the machine, a cutting tool mounted on the forward end of the or each boom, and a drive mechanism for rotating the cutting tool relative to the boom, the said mechanism including a multi-speed gearbox whereby the cutting tool may be selectively driven at two or more different cutting speeds.

REFERENCES:
patent: 2795408 (1957-06-01), Goodrich
patent: 3013784 (1961-12-01), Osgood
patent: 3288532 (1966-11-01), Carver
patent: 3489461 (1970-01-01), Lauber
patent: 3590612 (1971-07-01), Henning
patent: 3618724 (1971-11-01), Oehl et al.
patent: 3917021 (1975-11-01), Williams et al.
patent: 3966257 (1976-06-01), Shah

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