Air filter arrangement; assembly; and, methods

An air cleaner comprising:

• (a) a filter cartridge comprising:
• (i) a media pack comprising filter media including fluted media secured to facing media and configured to define opposite flow faces;
• (A) the media pack having a non-circular cross-section, perpendicular to a flow direction between the flow faces, with a first longer dimension thereacross and a second shorter dimension thereacross perpendicular to the first longer dimension;
• and,
• (B) the media pack being configured so that air cannot pass from into one flow face and out of the other flow face without filtering flow through the filter media;
• and,
• (i) a housing seal arrangement;
• the housing seal arrangement including:
• (A) a first portion extending around a perimeter of the filter media;
• and,
• (B) a seal member comprising a flexible lip member that also extends around the perimeter of the filter media and is positioned to flex toward the first portion of the housing seal arrangement when forming a seal against an air cleaner housing;
• and,
• (b) a housing having:
• an inlet, an outlet and an interior;
• (i) the filter cartridge being removably positioned in the housing interior with the flexible lip member sealed against a portion of the housing and flexed against a portion of the housing seal arrangement.

An air cleaner assembly comprising:

• (a) a housing defining an interior and comprising separable first and second housing sections;
• (i) the first section comprising an inlet section including an air flow inlet therein;
• (ii) the second section comprising an outlet section having an air flow outlet therein;
• (iii) the housing having a first housing cross-sectional dimension that is no more than 50% of a second cross-sectional dimension taken perpendicular to the first housing cross-sectional dimension;
• (b) a serviceable filter cartridge removably mounted within the housing interior;
• the serviceable filter cartridge comprising:
• (i) a media pack comprising filter media including fluted media secured to facing media and configured to define opposite flow faces;
• (A) the media pack being configured so that air cannot enter one face and exit the other flow face without filtering flow through the filter media;
• (ii) a housing seal member comprising a perimeter seal member extending around the media pack;
• the perimeter seal member being positioned between the first housing section and the second housing section;
• (iii) the media pack having a non-circular media pack cross-sectional shape in a plane perpendicular to the fluted media and the direction of flow through the media pack;
• the cross-sectional shape having a first cartridge cross-sectional dimension that is no more than 50% of a second cartridge cross-sectional dimension perpendicular to the first cartridge cross-sectional dimension;
• each of the first cartridge cross-sectional dimension and second cartridge cross-sectional dimension being taken in a plane perpendicular to the direction of flow through the media pack;
• and,
• (c) the first housing section having a portion that faces an inlet flow face of the media pack and which has a portion that slants toward the media pack in extension in a direction of the second housing cross-sectional dimension;
• (i) the air flow inlet being positioned off-set from a central plane through the media pack, which plane extends in a direction of flow through the media pack and perpendicular to the second cross-sectional dimension of the cartridge;
• and,
• (ii) the air flow inlet not being directed in a direction parallel to air flow through the media pack toward the air flow outlet.

An air filter cartridge for removable installation in an air cleaner housing;

• the air filter cartridge comprising:
• (a) a media pack comprising filter media including fluted media secured to facing media and configured to define opposite flow faces;
• (i) the media pack being configured so that air cannot pass into one face and out from the other flow face without filtering flow through the filter media;
• and,
• (b) a housing seal member non-removably positioned on the media pack;
• (c) the air filter cartridge including first and second opposite sides;
• (i) a first member of a projection/receiver arrangement non-removably positioned on the first side of the air filter cartridge spaced from the housing seal member and oriented for engagement with a second member of the projection/receiver arrangement positioned in the air cleaner housing, in use;
• the first member of a projection/receiver arrangement having opposite, diverging, sides.

An air filter cartridge for removable installation in an air cleaner housing;

• the air filter cartridge comprising:
• (a) a media pack comprising a stack of strips of fluted media secured to facing media and configured to define opposite inlet and outlet flow faces;
• (i) the media pack being configured so that air cannot pass into one face and out from the other flow face without filtering flow through the filter media;
• (b) a housing seal arrangement including a housing seal member non-removably positioned in extension around the media pack;
• and,
• (c) the air filter cartridge including a first pair of first and second, opposite, sides and a second pair of first and second, opposite, sides;
• (i) a first member of a projection/receiver arrangement non-removably positioned on the first side of the first pair of first and second opposite sides of the air filter cartridge and oriented for engagement with a second member of the projection/receiver arrangement positioned in an air cleaner housing, in use;
• (A) the first member of a projection/receiver arrangement comprising a receiver having opposite, diverging, sides, in extension toward the outlet flow face;
• the opposite, diverging, sides of the receiver also diverging from one another in extension toward opposite ones of the second pair of sides to define a receiver space therebetween.