Excavating machines

Details Excavating machines Excavating machines

1975-10-10

1979-01-30

Purser, Ernest R.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Stepper-type advance-causing means

299 33, 299 64, 299 75, E21C 2506, E21C 2902

Patent

active

041369106

ABSTRACT:
The excavating machine has a cutter carrying boom carried by a boom support member which can be swung about an axis extending in the direction of the roadway. The machine includes a cutter unit and a stay unit each of which is releasably anchorable in the roadway and each of which can be advanced relative to the other unit.

REFERENCES:
patent: 1332662 (1920-03-01), Gross
patent: 2788202 (1957-04-01), Barrett
patent: 3404920 (1968-10-01), Tabor
patent: 3467436 (1969-09-01), Pentith et al.
patent: 3498675 (1970-03-01), Kampf-Emden et al.
patent: 3612609 (1971-10-01), Reuls
patent: 3713700 (1973-01-01), Montacie
patent: 3773387 (1973-11-01), Montacie
patent: 3784257 (1974-01-01), Lauber et al.

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