Shaft-sinking apparatus with milling head and central worm conveyor
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United States of America Patent
Stats
-
Jun 23, 1981
Grant Date -
N/A
app pub date -
Aug 23, 1979
filing date -
Aug 26, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for the sinking of a shaft in which a machine platform can be anchored against the wall of the incipient shaft and carries an orbiting tool for cutting away the floor of the shaft, thereby dumping the detritus into a pilot-bore hole continuously drilled by a pilot-bore unit. The latter has a head for advancing the pilot bore and is provided with a worm conveyor running centrally through the shaft to transfer the detritus to a bucket on a loading platform disposed above the main platforms and connected thereto for feed cylinders. The platforms have cylinder arrangements whereby they can be independently anchored to the vertical wall of the shaft.
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