B - Operations – Transporting – 65 – G
Patent
B - Operations, Transporting
65
G
198/54
B65G 33/14 (2006.01) B65G 33/30 (2006.01)
Patent
CA 1076508
SCREW CONVEYOR CAPABLE OF MAINTAINING A RELATIVELY UNIFORM FLOW OF CONVEYED MATERIAL ABSTRACT OF THE DISCLOSURE A screw conveyor is provided capable of maintaining a relatively uniform flow of conveyed material, even when operating well below its flow capacity, comprising, in combination, a housing; an elongated conveyor passage through the housing, having an inlet and an outlet at opposite ends thereof; a helical screw having a central stem and a helical blade extending outwardly therefrom, rotatably mounted in the passage, for conveying material along the passage from one end to the other with rotation of the screw; and a plurality of helical blade segments at one end of the screw, each segment extending over an arc of from about 100° to about 130° about the central stem of the screw, and having a pitch length within the range from about 0. 5 to about 3 times the pitch length of the helical screw; the pitch length of the helical screw being from about 0. 5 to about 1 times its diameter; the segments being spaced apart a distance within the range from about 0 to about 22 mm; the plurality of segments taken collectively defining a plurality of through passages extending axially along the central stem of the screw, and extending in uniformly spaced relationship ? 10° circumferentially about the 360° circumference of the passage; each segment having a base portion attached at its inner periphery to the central stem of the screw over an arc of from about 50° to about 60°, and a wing portion extending about and closely abutting the inside wall of the passage, and terminating in a tip abutting the inside passage wall, the wing portion defining an open space between its inner periphery and the central stem of the screw, the space forming a part of a through passage defined by the segments.
303377
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