Grain accelerator precleaner

A - Human Necessities – 01 – F

Patent

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130/13

A01F 12/00 (2006.01) A01F 12/44 (2006.01)

Patent

CA 1036454

GRAIN ACCELERATOR PRECLEANER ABSTRACT OF THE DISCLOSURE The threshed material leaving the threshing cylinder of a grain harvester or combine is accelerated into a transverse air stream by a pair of rolls. The rolls are disposed on parallel axes and are rotated at a relatively high speed in opposite directions whereby their confronting peripheries engage and accelerate the threshed material to a velocity substantially in excess of the speed at which such material would fall by gravity. A wide band of relatively high speed air is directed transversely through the accelerated material to provide a precleaning of straw and chaff from the material normally passing to the grain separation or cleaning shoe section of the combine. The grain in the accelerated material continues in a relatively straight line trajectory and the straw and chaff are separated from the grain by the transverse air stream.

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