Patent ID: 6475071
Filing Date: 2002-11-05
Classification: B01D,B24B

Abstract:
A rotary filtration apparatus for the filtering of an abrasive polishing slurry contained within a storage volume, comprising:an elongated filter assembly having a first end, a longitudinal central axis of rotation, a second end, and a substantially cylindrical filter surface of controlled porosity positioned therebetween to define an interior volume; a housing having an inlet opening, an outlet opening, and a bypass opening, and further having an internal cavity of sufficient size to accommodate the filter assembly therein, the filter assembly being positioned within the cavity to define an annular volume within the cavity and having the interior volume in fluid communication with the inlet opening through the first end, the bypass opening in fluid communication with the interior volume through the second end, and the outlet opening being in fluid communication with the annular volume; a drive unit structured to rotate the filter assembly about the central axis of rotation; a bypass line in fluid communication with the bypass opening and the storage volume to transport slurry therebetween; a supply line in fluid communication with the storage volume and the inlet opening; and a pump positioned in the supply line to transport the slurry from the storage volume to the inlet opening of the housing.