Patent ID: 7713321

Claim:
An air cleaner assembly comprising: (a) a housing defining an interior and having: an air flow inlet section; an air flow outlet section; and, a primary filter cartridge receiving section between the air flow inlet section and the air flow section; and, a primary filter cartridge housing radial seal surface; (i) the housing including an access cover having a primary filter cartridge engagement and retainment arrangement thereon; (b) a first removable and replaceable primary filter cartridge positioned within the housing; the first primary filter cartridge comprising a media pack having an inlet flow face and an opposite outlet flow face; (i) the media pack comprising a plurality of flutes extending between the inlet flow face and the opposite outlet flow face; (ii) the media pack being closed to passage of unfiltered air therethrough, between the inlet flow face and the outlet flow face; and, (iii) the primary filter cartridge including a housing seal member thereon in radial sealing engagement with the primary filter cartridge housing radial seal surface; (c) the housing defining a first air flow annulus around the first removable and replaceable primary filter cartridge; and, (d) the primary filter cartridge housing radial seal surface comprising an interior flange projecting toward the air flow inlet section; (i) the interior flange having inner and outer surfaces; (ii) the housing seal member being sealed to the inner surface of the interior flange; and, (iii) the interior flange defining an air flow annulus region therearound within the housing interior and in flow communication with the first air flow annulus; and, (e) the primary filter cartridge engagement and retainment arrangement includes first and second, spaced, handle arrangement receivers in the access cover; (i) the first one of the handle arrangement receivers being positioned engaging a handle arrangement on the first primary filter cartridge positioned within the housing; and, (ii) the second one of the handle arrangement receivers being empty and positioned to receive a handle arrangement for an alternate sized cartridge to the first primary filter cartridge, when positioned within the housing instead of the first primary filter cartridge.