Air Filter Arrangement; Assembly; and, Methods

An air filter cartridge comprising:

• (a) a filter media pack having a first flow face and a second, opposite, flow face, wherein:
• (i) the filter media pack includes filter media arranged between the first flow face and the second, opposite, flow face;
• (ii) the filter media pack having a rectangular cross-sectional shape, in a direction perpendicular to a central flow axis extending in an axial direction between the first flow face and the second, opposite, flow face;
• (iii) the filter media pack comprising four sides extending between the first flow face and the second, opposite, flow face, wherein the four sides include a first pair of first and second opposite sides, and a second pair of first and second opposite sides, and the four sides form a periphery of the filter media pack;
• (b) end pieces over the first pair of first and second opposite sides of the filter media pack;
• and
• (c) a housing seal arrangement arranged around the periphery of the filter media pack, wherein the housing seal arrangement comprises:
• (i) a seal member comprising an axial pinch seal portion configured to be pinched between seal flanges on a housing, when the air filter cartridge is installed for use;
• and
• (ii) a trough on only one side of the housing seal arrangement and located inwardly of the axial pinch seal portion, wherein the trough has an opening facing in the axial direction toward the second flow face and is configured to receive a portion of an air cleaner assembly projecting therein when the air filter cartridge is installed for use.

An air filter cartridge comprising:

• (a) a filter media pack having a first flow face and a second, opposite, flow face, wherein:
• (i) the filter media pack includes filter media arranged between the first flow face and the second, opposite, flow face;
• (ii) the filter media pack having a rectangular cross-sectional shape, in a direction perpendicular to a central flow axis extending in an axial direction between the first flow face and the second, opposite, flow face;
• (iii) the filter media pack comprising four sides extending between the first flow face and the second, opposite, flow face, wherein the four sides include a first pair of first and second opposite sides, and a second pair of first and second opposite sides, and the four sides form a periphery of the filter media pack;
• (b) end pieces over the first pair of first and second opposite sides of the filter media pack;
• and
• (c) a housing seal arrangement arranged around the periphery of the filter media pack, wherein the housing seal arrangement comprises:
• (i) a seal member comprising an axial pinch seal portion configured to be pinched between seal flanges on a housing, when the air filter cartridge is operably installed in the housing;
• (ii) a single trough in the housing seal arrangement extending around the periphery of the filter media pack and constructed to receive a projection of the housing when the air filter cartridge is operably installed in the housing, wherein:
• (A) the trough is located inwardly of the axial pinch seal portion;
• (B) the trough has an opening facing in the axial direction toward the second flow face.