Classifying – separating – and assorting solids – Sifting – Feeding and discharging
Patent
1989-04-05
1991-01-08
Cherry, Johnny D.
Classifying, separating, and assorting solids
Sifting
Feeding and discharging
209247, 209257, 209355, 209420, B07B 100, B07B 146
Patent
active
049832808
ABSTRACT:
Screening apparatus comprises a feeder conveyor, an elevator, a screen box, an end boom elevator and two lateral boom elevators all carried on a wheeled trailer. The elevator has an elongated support with an endless belt arranged around two rollers longitudinally spaced apart on the support. A superstructure framework on the trailer carries the support in a plurality of inclined positions, and the screen box is pivotally linked to the end of the support corresponding to the discharge end of the belt and hinged to the structure at the opposite end. The support extends and retracts along its lengths by means of hydraulic rams and thereby pivots the screen. The screen box also has hydraulic rams and cylinders to adjust the angle of inclination of the screen relative to the support and thereby also adjust the inclination of the support.
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Cherry Johnny D.
Powerscreen International Limited
Wacyra Edward M.
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