Apparatus for cutting rock

Details Apparatus for cutting rock Apparatus for cutting rock

1984-03-29

1985-11-26

Novosad, Stephen J.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

Cleansing fluid passage

299 69, 299 85, 299 94, E21C 3522, E21C 3706

Patent

active

045551430

ABSTRACT:
For cutting rock by means of cutting head (1) having its bits (24) cooperating over a limited axial shifting stroke (a) with a cylinder-piston-aggregate, for example a valve (18), it is proposed to intermittently subject the cylinder-piston-aggregate to the action of pressurized fluid, thus exposing the bit (24) during its engaging the rock to percussion forces. During the phases lacking any action of pressurized fluid onto the cylinder-piston-aggregate, the bit (24) shall be pushed into its starting position. This embodiment can be realized with both hydraulic and pneumatic cylinder-piston-aggregates, noting that in case of an embodiment having a hydraulic cylinder-piston-aggregate it is preferred to design this cylinder-piston-aggregate as a valve (18) which simultaneously provides the possibility to expel pressurized liquid via a spraying nozzle (32) onto the mine face. (FIG. 2)

REFERENCES:
patent: 3536451 (1970-10-01), Ludwin
patent: 3741316 (1973-06-01), Alajouanine
patent: 4289357 (1981-09-01), Hintermann et al.
patent: 4333687 (1982-06-01), Barnstorf
patent: 4456306 (1984-06-01), Wrulich et al.

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