Patent ID: 7179377

Claim:
A sludge filter for use in a container, said container having container interior surfaces, including container walls and a container floor, comprising: a filter media attached to a filter net; said filter media comprising a planar sheet having a media front surface and a media rear surface with transverse media openings extending from said media front surface to said media rear surface; said filter net comprising a planar net having a net front surface and a net rear surface with transverse net perforations extending from said net front surface to said net rear surface; said media openings liquid permeable; said media openings limited to a predetermined size; said net perforations larger than said media openings; said net rear surface comprising a plurality of rear surface nodes and a plurality of rear surface indented sections; said rear surface nodes extended from said indented sections in relation to the plane of said filter net; said filter media sized to extend beyond a perimeter of said filter net thereby defining a filter media perimeter extension; a first attachment component of a hook and loop fastener system extending around the perimeter of said filter and attached to said media perimeter extension; a second attachment component of the hook and loop fastener system attachable to an inner surface of the container; and said sludge filter selectively attachable to and removable from said container surface by said first attachment component and said second attachment component.