US 5,346,071 A · Trommel screening apparatus

Abstract

The present invention is a vehicle-mounted trommel screening apparatus. A rotating trommel screen cage having an open front and a closed back is mounted on the vehicle so that the open front of the trommel screen cage is at a side of the vehicle and is adjustably tiltable about the vehicle side while the cage rotates. A conveyor is mounted below the trommel screen cage to convey material rearwardly off the end of the trailer. A push plate folds down below the trommel to assist in loading material that has been discharged from the front. Axially extending gussets within the cage provide additional lifting and tumbling action. Material is dumped into the trommel screen cage with the cage tilted back from the open end. The rotation of the cage causes a tumbling action which simultaneously breaks up larger pieces of material and screens smaller material to the conveyor below the screen. Material retained in the trommel screen may be dumped by tilting the trommel screen cage forward toward the open end. Alternatively, as sufficient material is received in the cage larger pieces of the material will automatically fall out of the open front. The tilt angle and rotation speed may be instantaneously and variably adjusted for optimal operational.

Claims21

Dependent claims

A trommel screening apparatus for screening material comprising:

a) a support frame;
b) a trommel screen cage for receiving material to be screened, the screen cage having an open front, a closed back, and outer peripheral framework and a screen panel attached to the peripheral framework;
c) a carriage, the screen cage rotatably mounted to the carriage, the carriage tiltably mounted to the support frame whereby the screen cage with the open front is positionable to receive and screen material and to dump unscreened material out of the apparatus;
d) a variably tilting means for tilting the carriage and screen cage;
and
e) a drive means engaged with the trommel screen cage for rotating the screen cage whereby the material in the screen cage is tumbled and the screened material falls downwardly through and below the screen panel.

3 more elements

Dependencies are inferred from the claim text.

Trommel screening apparatus

Life of this patent

Trommel screening apparatus

Life of this patent

Abstract

Claims21