Classifying – separating – and assorting solids – Plural – diverse separating operations – Gaseous suspension and sifting
Patent
1990-07-12
1991-05-28
Hajec, Donald T.
Classifying, separating, and assorting solids
Plural, diverse separating operations
Gaseous suspension and sifting
209 37, B07B 900
Patent
active
050192426
ABSTRACT:
The invention is comprised of an apparatus for cleaning particulate material, particularly grain, wherein the grain is comprised of relatively heavy whole grain particulates and relatively lightweight fine grain particles and foreign material. An upstanding vertically disposed housing has upper and lower ends with upper and lower vertically spaced hoppers having upper and lower ends mounted therein. Vibrating screen members of a frusto-conical shape are mounted on the upper ends of the hoppers. The hoppers are laterally spaced from the housing to create a substantially continuous vertical air conduit from the lower to the upper end of the housing. A centrifugal fan is mounted on the top of the housing to move air upwardly through the air conduit. A second air conduit connects the lower ends of the hoppers and the upper end of the housing, and is operable so that suction is imposed by the fan on the second air conduit. A means is provided for supplying particulate grain on the screen member on the upper hopper. An exit port is provided on the upper end of the housing. Whole grain particles move downwardly over the screen member on the upper hopper, fenced downwardly around the upper hopper to the screen member on the lower hopper, and then downwardly around the lower hopper to the lower end of the housing. A grain discharge means is mounted at the lower end of the housing. The fan pulls the fine material upwardly through the air conduits to the exit port.
REFERENCES:
patent: 284488 (1883-09-01), Russell
patent: 422212 (1890-12-01), Walter
patent: 1966988 (1934-07-01), McKenna
patent: 2044628 (1936-06-01), O'Toole
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