Patent ID: 6875364

Claim:
A filter apparatus for use with a pump, said filter apparatus comprising: a filter element; a supply line for delivery of a flushing medium; a filter basket, wherein said filter element encloses at least a portion of said filter basket, and wherein said filter basket comprises: a manifold, comprising: a flushing medium supply opening in a first surface thereof for receiving said supply line; a plurality of apertures in a second surface of said manifold; an internal chamber fluidly connecting said flushing medium supply opening with said plurality of apertures; a blocking piece positioned in said internal chamber configured to rotatably move in said internal chamber and periodically block a flow of flushing fluid from the flushing medium supply opening to less than all of the plurality of apertures; and a plurality of tubes, wherein each tube of said plurality of tubes extends from one of said plurality of apertures and includes a plurality of perforations such that a flushing medium may flow from said supply line through the internal chamber into the plurality of tubes and through said perforations to backflush said filter element.