Screening device

Abstract

A screening assembly is provided including a closed housing having an inlet and a first outlet, and a second outlet. A screen drum having a plurality of circumferential slots is mounted for rotation in the housing so that liquid passing from the inlet to the second outlet must pass through the drum slots. A a barrier member mounted on a short housing segment between the inlet and first outlet prevents short-circuiting of suspension flow from the inlet to the first outlet, and also includes a plurality of comb-like teeth extending into the drum circumferential slots. The barrier member has concave surface portions thereof adjacent the suspension inlet and outlet. The drum has a plurality of circumferentially spaced grooves or raised portions formed in or on the exterior surface thereon and extending substantially parallel to the axis of the rotation of the drum. The center lines of the inlet and first outlet preferably make an angle of about 45.degree.-90.degree. with respect to each other, and the second outlet is perpendicular to a plane containing the inlet and first outlet.

Dependencies are inferred from the claim text.