Patent ID: 8852308

Claim:
A filter arrangement for a system within which fluid is filtered, the system has a portion with an aperture into which the filter arrangement is located for filtering fluid from a dirty side and to a clean side as the fluid flows through the filter arrangement, the filter arrangement including: a frame including: an outer periphery that has a shape that is complementary to a shape of the system aperture for location of the filter arrangement therein; and a plurality of filter pleat pack locations, each filter pleat pack location being associated with an aperture through the frame for flow proceeding from the dirty side to the clean side, at each filter pleat pack location adjacent to each frame aperture the frame includes at least one portion having a saw-tooth contoured surface; a plurality of filter pleat packs that each allows flow therethrough while stopping flow of particulate matter, each filter pleat pack including a plurality of pleats, each filter pleat pack being removably located at a respective filter pleat pack location of the frame, covering a respective frame aperture, with the pleats of the filter pleat pack mating against the respective saw-tooth contoured surface; and a plurality of removable retainers that non-permanently hold the filter pleat packs against the frame, each retainer having at least one saw-tooth contoured surface that mates against the pleats of the filter pleat pack so that the pleats of the filter pleat pack are sandwiched between the retainer and the frame.