Mining or in situ disintegration of hard material – Hard material disintegrating machines – Rotary cutter head with advance direction coincident or...
Patent
1978-03-14
1979-10-02
Purser, Ernest R.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Rotary cutter head with advance direction coincident or...
299 31, 299 80, E21C 910
Patent
active
041696298
ABSTRACT:
Machine for the digging of passages, galeries or tunnels in underground work, of the type in which the stoping device consists of a single stoping drum or mill of which the axis of rotation is practically perpendicular to the plane of the working-face, and whereby this rotary mill is attached to an arm which pivots around a shaft which is also practically perpendicular to the working-face, characterized by the fact that the latter bears in a second arm, which in its turn is attached on a shaft which is practically perpendicular to the working-face and bears in the machine frame, whereby the length of the two arms and the angles of rotation of the arms are chosen in such a manner that the mill can cover the entire surface of the working-face to be stoped, without having to move the machine laterally.
REFERENCES:
patent: 3306663 (1967-02-01), Webster
patent: 3467436 (1969-09-01), Pentith et al.
patent: 4027918 (1977-06-01), Hujimori et al.
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