Patent ID: 9527039
Filing Date: 2016-12-27
CPC Classification: B01D

Claim Text:
1. A filter arrangement, comprising: a chamber and a plurality of elongate hollow filtration elements contained therein, each element comprising a semi-permeable filtration wall and an internally located back-washing mechanism; and an inlet for unfiltered fluid and an outlet for filtered fluid; wherein: each back-washing mechanism comprises at least one debris receiving portion having a cross-section corresponding to the cross-section of the hollow filtration element such that the outer perimeter of the debris receiving portion is located immediately adjacent to the inner periphery of the filtration wall of the hollow element; wherein each backwashing mechanism is adapted to allow movement of the debris receiving portion(s) along at least part of the length of the respective filtration element the chamber is generally cylindrical and the plurality of hollow filtration elements are arranged parallel to the elongate axis of the cylindrical chamber; the inlet for unfiltered fluid and the outlet for filtered fluid have a common and coaxial axis that is the elongate axis of the cylindrical chamber; the plurality of hollow filtration elements are equally spaced within and around the periphery of the cylindrical chamber and define a centrally located space having a radius measured radially from the central elongate axis wherein the centrally located space is configured to receive filtered process fluid from the outer surfaces of the filtration elements and is fluidly connected to the outlet of the filter arrangement; and the radius of said centrally located space is equal to or less than the radius of the outlet for filtered fluid.