METHOD AND APPARATUS FOR UNLOADING A STOCKPILE
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United States of America Patent
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Issued Date -
Jun 19, 2014
app pub date -
Dec 12, 2013
filing date -
Dec 13, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention is directed to an apparatus and a method for unloading a stockpile with an elongated unloading bridge, which is provided at its both ends with support wheels, the unloading bridge being horizontally movable at least in an essentially transverse direction with respect to a longitudinal direction of the unloading bridge. The unloading bridge includes at least one car movable along the unloading bridge, the car comprising at least one rake extending essentially transversally with respect to a longitudinal direction of the unloading bridge and inclined to a position between the horizontal and the vertical. Characteristically, the unloading bridge includes at least two adjacent conveyor screws below the unloading bridge and extending between the ends of the unloading bridge, each conveyor screw being provided with a thread opposite to that of an adjacent conveyor screw, and each conveyor screw being rotatable in a direction opposite to that of an adjacent conveyor screw. Further, the conveyor screws are positioned adjacently so that a free space is left between them, and the threads and rotating directions of the conveyor screws have been arranged so that the conveyor screws are adapted to forming a bank in the free space between them.
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