Filter cleaning system and method

Abstract

A filter apparatus includes a cylindrical casing defining an inlet for receiving a liquid to be filtered and an outlet for the filtered liquid. A cylindrical filter element is disposed within the casing and is sized to define an annular volume between the exterior for the filter element and the interior of the casing. The annular volume is in fluid flow communication with the inlet. The particulate in the liquid is retained on the exterior of the filter element, while the liquid flows into the interior of the filter element. The filter element has a porous end adjacent the outlet for flow of the filtered liquid out the center of the filter element and through the outlet. Nozzles are disposed within the filter element, to direct a cleaning fluid at the interior surface of the filter element to wash the particulate off the exterior of the filter element.

Dependencies are inferred from the claim text.