Grain accelerator precleaner

Details Grain accelerator precleaner Grain accelerator precleaner

1975-07-02

1977-02-15

Lutter, Frank W.

Classifying, separating, and assorting solids

Adhesion

With selective differentiation

209 32, 209134, 209153, A01F 1224

Patent

active

040077446

ABSTRACT:
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.

REFERENCES:
patent: 1290610 (1919-01-01), Luedke
patent: 3456786 (1969-07-01), Lee
patent: 3635336 (1972-01-01), Chapman
patent: 3813184 (1974-05-01), Temple et al.

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