Patent ID: 7931803

Claim:
A fluid filter comprising a housing provided with a fluid inlet and a fluid outlet, filter means being mounted in the housing between the fluid inlet and the fluid outlet, the filter means comprising a plurality of filter pores to filter fluid flowing through the housing, actuation means being provided to move the filter means, in use, within the housing in a direction substantially parallel to the axis of at least one pore, that is in a direction substantially parallel with the direction of fluid flow through at least one pore to dislodge particles of filtered material from the filter means so as to clean the pores of the filter means, wherein the housing includes a drain aperture on an upstream side of the filter means, and wherein the fluid filter further includes plug means coupled to the actuation means for selectively sealing the drain aperture, wherein the actuation means is configured to move the plug means relative to the drain aperture when the filter means is moved.