Patent ID: 7241382

Claim:
A filter apparatus for use with a pump, the filter apparatus comprising: a filter element; a first supply line for delivery of a flushing medium; a second supply line for delivery of an enhancing material; a filter basket at least partially enclosed in the filter element, and wherein the filter basket comprises: a manifold, comprising: a first member having a first opening so as to receive the first supply line and a second opening so as to receive the second supply line; a second member having a first plurality of apertures and a second plurality of apertures; the first and second members defining a first internal chamber fluidly connecting the first opening with the first plurality of apertures; the first and second members defining a second internal chamber fluidly connecting the second opening with the second plurality of apertures; a first plurality of tubes at least partially enclosed in the filter element, wherein each tube of the first plurality of tubes extends from one of the first plurality of apertures and includes a first plurality of perforations such that a flushing medium may flow from the first supply line through the internal chamber into the first plurality of tubes and through each of the first plurality of perforations to backflush the filter element; and a second plurality of tubes at least partially surrounding the filter element, wherein each tube of the second plurality of tubes extends from one of the second plurality of apertures and includes a second plurality of perforations such that a enhancing material may flow from the second supply line through the internal chamber into the second plurality of tubes and through each of the second plurality of perforations.