Mining or in situ disintegration of hard material – Hard material disintegrating machines – Rotary cutter head with advance direction coincident or...
Patent
1993-10-06
1995-08-08
Bagnell, David J.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Rotary cutter head with advance direction coincident or...
299 80, 299 85, E21B 1062, F21C 2724
Patent
active
054392748
ABSTRACT:
A continuous mining machine having a cutter frame with two rotary boring heads mounted on this frame for rotation about axes extending longitudinally of the machine. Each boring head has a plurality of radially extending rotor arms which carry and support cutter bits on the front thereof. A pair of reciprocating pole devices are mounted in each of the rotor arms for movement in the radial direction of the arm. A number of link members are each pivotally connected at opposite ends thereof to respective pair of the pole devices and additional cutter bits are mounted on the link members. There is also a cam mechanism for reciprocating each pair of pole devices as the boring heads are rotated. The cam mechanism causes each pair of pole devices to be pushed radially outwardly at each of the four corners distributed about a circular hole cut by the respective boring head in such a manner that the resulting hole bored by the machine is generally rectangular. Preferably, each pair of pole devices has rollers mounted thereon and each rotor arm has tracks mounted therein, on which the rollers run. The preferred mining machine includes a mobile frame with a longitudinal conveyor mounted on this frame having a forwardly open throat adjacent floor level.
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Bagnell David J.
McGlynn Bliss
Prairie Machine & Parts Mfg. Ltd.
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