Patent ID: 7662278
Filing Date: 2010-02-16
Classification: B01D

Abstract:
1. A self-cleaning filter assembly comprising an enclosed casing with a movable member/piston and a filter therein, the casing having an inlet for dirty liquid containing contaminant supplied thereto and a first outlet for clean filtered liquid, the filter assembly being constructed and arranged to provide, in its normal operating mode, a first liquid flow path from the casing inlet to the casing outlet and including the filter and a space adjacent to said movable member and beyond the filter and, in a cleaning mode, to provide a second liquid flow path from the casing inlet to the space adjacent to the movable member, such that the movable member compresses the filter as a result of a force of the liquid flow from the inlet to the space adjacent to the movable member so that contaminant is released from the filter for removal from the filter assembly, and wherein a main tube is provided in the casing to feed liquid from the inlet to the bottom thereof, the main tube having an outlet located adjacent a bottom of the casing.