Tubular filter with resilient deformable support

Claim 1

A tubular filter comprising in combination; a perforated resiliently deformable plastic tubular member, means at one end of said member including a threaded portion for fastening engagement with a support plate, means for closing off the opposite end of said member, said tubular member including a longitudinal slot extending along the full length thereof, a plurality of longitudinal channels extending about the outer peripheral surface of said member, a plurality of fluid-flow apertures extending through the base of each of said channels forming perforations for the flow of filter fluid through said member; and an essentially cylindrical member of perforate resilient material encompassing said tubular member, said channels being dimensioned so that upon radial deformation of said tubular member tending to close the slot, the inner surface of said cylindrical member remains in spaced relationship with the base of said channels, said deformable member and said cylindrical member being constructed and arranged so that fluid to be filtered flows from the exterior of the cylindrical member to the interior of the deformable member and said slot closes due to the pressure differential across the cylindrical and deformable members, and when the flow stops, the deformable and the cylindrical members expand thereby ejecting any filtered solids from the exterior of the cylindrical member.