Patent ID: 6245225
Filing Date: 2001-06-12
Classification: E02B

Abstract:
Staged filter apparatus (1) for mechanically separating solids from liquids flowing in channels, gutters or conduits, which has a multiplicity of stage screen bars (7') connected to form a stationary grating (7), and a multiplicity of stage screen bars (6') connected to form a movable grating (6), the gratings (6, 7) being arranged inclined in the direction of flow inside the flowing liquid starting from a level situated below the surface, and the stage screen bars (6', 7') being constructed in a stepped fashion in the direction facing the incoming flow, and in which the movable grating (6) can be actuated by means of a drive device (8) on a track which, starting from a zero position which is identical in the vertical and horizontal directions to the stationary grating (7), permits a stroke movement which rises over the stages of the stage screen bars (7') connected to form the stationary grating (7) and against the direction facing the incoming flow, and which reaches at least to a position identical in the vertical direction and in the horizontal direction to the next higher stage of the stationary grating (7), and subsequently guides the stage screen bars (6') of the movable grating (6) below the stationary grating (7) back into the zero position, the stationary grating (7) being surrounded at least laterally by frame parts (3, 4), characterized in thatall the drive elements (11, 12, 19; 13) of the movable grating (6) are essentially arranged in the common plane formed by the stationary grating (7) and the movable grating (6) in the zero position.