# US RE49,213 E1 · Air filter arrangement; air cleaner assembly; and, methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US RE49,213 E1 - Document ID: USRE49213E1 - Status: Granted - Kind: E1 - Application number: 16/937,201 - Filed: 2020-07-23 - Granted: 2022-09-20 - Earliest claimed: 2007-02-26 - Assignees: Donaldson Company, Inc. - Applicants: Donaldson Company, Inc. - Inventors: Benny K. Nelson; David W. Nelson - Web page: https://patentgrep.com/patent/USRE49213E1 ## CPC - B01D 46/526: {in stacked arrangement} - B01D 46/0005: {Mounting of filtering elements within casings, housings or frames (B01D46/2422 takes precedence)} - B01D 46/522: {with specific folds, e.g. having different lengths} - B01D 46/525: {which comprises flutes} - F02M 35/02491: {Flat filter elements, e.g. rectangular} - B01D 2275/206: Special forms, e.g. adapted to a certain housing - B01D 2279/60: for the intake of internal combustion engines or turbines - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF ## Abstract A media pack for including in a filter cartridge of an air filter arrangement, is provided. A variety of configurations for the media pack are described and shown, an example shown being trapezoidal. Filter cartridges including such media packs, air cleaner assemblies and equipment systems are described. Also methods of use assembly are described. ## Claims ### Claim 1 An air cleaner assembly comprising: (a) a housing base; (i) the housing base including a perimeter wall and an end; the housing base defining an access opening opposite the housing end; (ii) the housing base including an aperture arrangement through the perimeter wall; and, (iii) the housing base having an air flow outlet therein; (b) an access cover removably mounted on the housing base and over the access opening; (i) the access cover including: an outer cover; a pressure flange; and, a side arrangement extending between the outer cover and the pressure flange; the access cover being positioned on the housing base with the pressure flange projecting into the housing base to a location between the aperture arrangement, through the perimeter wall, and the air flow outlet; and, (c) an air filter cartridge operably positioned in the housing; the air filter cartridge comprising; (i) a media pack having first and second, opposite, inlet and outlet flow faces; (A) the media pack comprising media including fluted media secured to facing media to define inlet and outlet flutes extending in a direction between the first and second, opposite, inlet and outlet flow faces; (B) the media pack being closed to flow of unfiltered air completely therethrough from the first flow through second flow face; and, (ii) a housing seal arrangement positioned around the media pack; (A) the housing seal arrangement including a portion molded-in-place in contact with a portion of the media; (B) the housing seal arrangement including a pinch flange and defining a receiving gap between a portion of the pinch flange and the media pack; and, (C) the pinch flange defining a non-rectangular perimeter shape; (c) the housing base including a flange projecting into the receiving gap between the pinch flange of the housing seal arrangement, and the media pack; and, (d) the housing base including a housing base pressure flange portion against which the pinch flange of the housing seal arrangement is pressed by the pressure flange on the access cover; (i) the housing base pressure flange portion being positioned such that the aperture arrangement through in perimeter wall of the housing base is located between the access opening and the housing base pressure flange portion. ### Claim 2 (depends on 1) An air cleaner assembly according to claim 1 wherein: (a) the housing base pressure flange portion includes a bead projection thereon pressed into the pinch flange of the housing seal arrangement. ### Claim 3 (depends on 1) An air cleaner assembly according to claim 1 wherein: (a) the pinch flange includes a flat surface directed toward, and pressed against, the housing base pressure flange. ### Claim 4 (depends on 2) An air cleaner assembly according to claim 2 wherein: (a) the cartridge includes a protective covering on at least one side of the media pack; and, (b) at least a portion of the flange projecting into the receiving gap projects into a location between a portion of the protective covering and a portion of the pinch flange. ### Claim 5 (depends on 1) An air cleaner assembly according to claim 1 wherein: (a) each of the inlet and outlet flow faces of the media pack has a non-circular perimeter definition; and, (b) the pinch flange defines a non-rectangular perimeter shape comprising a plurality of straight sections. ### Claim 6 (depends on 5) An air cleaner assembly according to claim 5 wherein: (a) the perimeter definition of each one of the inlet flow face and the outlet flow face is trapezoidal. ### Claim 7 (depends on 1) An air cleaner assembly according to claim 1 wherein: (a) the non-rectangular perimeter shape of the pinch flange includes at least 3 straight sections of different lengths. ### Claim 8 (depends on 7) An air cleaner assembly according to claim 7 wherein: (a) the non-rectangular perimeter shape of the pinch flange includes 4 straight sections of different lengths. ### Claim 9 (depends on 1) An air cleaner assembly according to claim 1 wherein: (a) the first flow face is planar; and, (b) the second flow face is planar. ### Claim 10 (depends on 1) An air cleaner assembly according to claim 1 wherein: (a) the housing seal arrangement is recessed from the inlet flow face. ### Claim 11 (depends on 1) An air cleaner assembly according to claim 1 wherein: (a) the housing seal arrangement has a constant cross-section in extension around the media pack. ### Claim 12 An air filter cartridge comprising: (a) a media pack having first and second, opposite, flow faces; (i) the media pack comprising a stack of alternating corrugated filter media and facing filter media, wherein the corrugated filter media includes a plurality of ridges extending in an axial direction of extension between the first and second, opposite, flow faces; (ii) the first flow face comprising a planar flow face with a non-rectangular perimeter shape; (iii) the media pack having a first pair of first and second opposite sides, wherein the first side extends along a direction of the plurality of ridges between the first and second opposite flow faces and having a plane non-parallel to the second opposite side of the media pack; and, (iv) the media pack having a second pair of third and fourth opposite sides, wherein the second pair of third and fourth opposite sides are parallel; and, (b) sealant applied to, and covering, the first side of the first pair of first and second opposite sides. ### Claim 13 (depends on 12) An air filter cartridge according to claim 12 including: (a) a housing seal arrangement. ### Claim 14 (depends on 13) An air filter cartridge according to claim 13 wherein: (a) the housing seal arrangement includes a pinch flange. ### Claim 15 (depends on 12) An air filter cartridge according to claim 12 wherein: (a) the first pair of first and second opposite sides extending between the first flow face and the second flow face engage the first flow face along first and second edges; the first edge having a different length than the second edge; and, (b) the second pair of third and fourth opposite sides extend between the first and second flow faces and also between the first and second sides; the second pair of third and fourth opposite sides engaging the first flow face along third and fourth edges, wherein the third and fourth edges have a same length. ### Claim 16 (depends on 12) An air filter cartridge according to claim 12 wherein: (a) the third side comprises an exposed corrugated filter media surface; and (b) the fourth side comprises an exposed facing filter media surface. ### Claim 17 (depends on 12) An air filter cartridge according to claim 12 wherein: (a) the corrugated filter media comprises a folded sheet. ### Claim 18 (depends on 12) An air filter cartridge according to claim 12 wherein: (a) the corrugated filter media comprises the plurality of ridges having radiused curves. ### Claim 19 (depends on 12) An air filter cartridge according to claim 12 wherein: (a) the facing filter media comprises a non-corrugated sheet. ### Claim 20 (depends on 12) An air filter cartridge according to claim 12 wherein: (a) the facing filter media comprises corrugations, wherein the corrugations of the facing filter media run in a direction perpendicular to the axial direction. ### Claim 21 (depends on 12) An air filter cartridge according to claim 12 including: (a) a first side panel having at least 70% of a length of the first side between the first and second flow faces sealed thereto, and, (b) a second side panel having at least 70% of a length of the second side between the first and second flow faces sealed thereto. ### Claim 22 (depends on 21) An air filter cartridge according to claim 21 wherein: (a) the first side panel is a molded-in-place side panel; and, (b) the second side panel is a molded-in-place side panel. ### Claim 23 (depends on 21) An air filter cartridge according to claim 21 including: (a) a molded-in-place perimeter housing seal arrangement extending around the media pack and across the first and second side panels. ### Claim 24 (depends on 22) An air filter cartridge according to claim 22 wherein: (a) an entire portion of the first side between the housing seal arrangement and the outlet flow face is embedded in the first side panel; and, (b) an entire portion of the second side between the housing seal arrangement and the outlet flow face is embedded in the second side panel. ### Claim 25 (depends on 21) An air filter cartridge according to claim 21 wherein: (a) the first and second side panels are each recessed from the inlet flow face by a distance within the range of 5 mm to 10 mm. ### Claim 26 (depends on 12) An air filter cartridge according to claim 12 wherein: (a) the first side is embedded in a molded-in-place side panel. ### Claim 27 (depends on 12) An air filter cartridge according to claim 12 wherein: (a) the filter media pack comprises rows of the plurality of ridges, wherein the rows of the plurality of ridges are separated by the facing media. ### Claim 28 (depends on 27) An air filter cartridge according to claim 27 wherein: (a) the rows of the plurality of ridges separated by the facing media form flutes. ### Claim 29 (depends on 28) An air filter cartridge according to claim 28 wherein: (a) the flutes comprise inlet flutes open to flow at the first flow face and closed to flow at the second flow face, and outlet flutes closed to flow at the first flow face and open to flow at the second flow face. ### Claim 30 (depends on 38) An air filter cartridge according to claim 38 wherein: (a) at least a portion of the flutes comprise tapered flutes. ### Claim 31 (depends on 23) An air filter cartridge according to claim 23 wherein: (a) the alternating corrugated filter media and facing filter media are secured to each other at one of the first flow face and the second flow face. ### Claim 32 (depends on 31) An air filter cartridge according to claim 31 wherein: (a) the alternating fluted filter media and facing filter media are secured to each other at the one of the first flow face and the second flow face by adhesive. ### Claim 33 (depends on 28) An air filter cartridge according to claim 28 wherein: (a) at least a portion of the flutes do not extend a complete distance between the first flow face and the second flow face. ### Claim 34 (depends on 28) An air filter cartridge according to claim 28 wherein: (a) at least a portion of the flutes are closed prior to one of the first flow face and the second flow face. ### Claim 35 (depends on 34) An air filter cartridge according to claim 34 wherein: (a) the flutes closed prior to one of the first flow face and the second flow face are closed by folding the flutes closed. ### Claim 36 (depends on 27) An air filter cartridge according to claim 27 wherein: (a) the rows the plurality of parallel ridges comprises alternating concave ridge and convex ridge. ### Claim 37 (depends on 12) An air filter cartridge according to claim 12 wherein: (a) the plane of the first side is generally perpendicular to the first flow face. ### Claim 38 An air cleaner assembly comprising: (a) a housing having an access cover removably mounted thereon; and, (b) an air filter cartridge operably positioned within the air cleaner housing; the air filter cartridge comprising; (i) a media pack having first and second, opposite, flow faces; (A) the media pack comprising a stack of alternating corrugated filter media and facing filter media, wherein the corrugated filter media includes a plurality of ridges extending in an axial direction of extension between the first and second, opposite, flow faces; (B) the first flow face comprising a planar flow face with a non-rectangular perimeter shape; (C) the media pack having a first pair of first and second opposite sides, wherein the first side extends along a direction of the plurality of ridges between the first and second opposite flow faces and having a plane non-parallel to the second opposite side of the media pack; and, (D) the media pack having a second pair of third and fourth opposite sides, wherein the second pair of third and fourth opposite sides are parallel; and, (ii) sealant applied to, and covering, the first side of the first pair of first and second opposite sides. ### Claim 39 (depends on 38) An air cleaner assembly according to claim 38 wherein: (a) the media pack has a first pair of opposite sides; and a second pair of opposite sides; (i) the first pair of opposite sides comprising first and second sides extending between the first flow face and the second flow face and engaging the first flow face along first and second edges; the first edge having a different length than the second edge; (ii) the second pair of opposite sides comprising third and fourth sides extending between the first and second, opposite, flow faces and also between the first and second sides; the second pair of opposite sides engaging the first flow face along third and fourth edges; (b) the third side comprising an exposed corrugated media sheet surface; (c) the fourth side comprising an exposed facing media sheet surface; and, (d) a housing seal arrangement. ### Claim 40 An air filter cartridge comprising: (a) a media pack having first and second, opposite, flow faces; (i) the media pack comprises corrugated filter media forming rows of a plurality of ridges extending in an axial direction between the first and second, opposite, flow faces; (ii) the media pack comprising facing filter media located between the corrugated filter media; (iii) the media pack having a first pair of first and second opposite sides, and a second pair of third and fourth opposite sides, wherein the first side extends in the axial direction between the first and second opposite flow faces and having a plane non-parallel to the second opposite side of the media pack, and the second pair of third and fourth opposite sides are parallel; and, (b) sealant applied to, and covering, the first side of the first pair of first and second opposite sides. ### Claim 41 (depends on 40) An air filter cartridge according to claim 40 wherein: (a) the plane of the first side is generally perpendicular to the first flow face. ### Claim 42 (depends on 40) An air filter cartridge according to claim 40 wherein: (a) the corrugated filter media forming rows of a plurality of ridges and the facing filter media located between the corrugated filter media forming rows of a plurality of ridges form a plurality of flutes extending in a direction from the first flow face to the second flow face. ### Claim 43 (depends on 42) An air filter cartridge according to claim 42 wherein: (a) the plurality of flutes comprise inlet flutes open to flow at the first flow face and closed to flow at the second flow face, and outlet flutes closed to flow at the first flow face and open to flow at the second flow face. ### Claim 44 (depends on 40) An air filter cartridge according to claim 40 wherein: (a) the first flow face comprising a planar flow face with a non-rectangular perimeter shape. ### Claim 45 (depends on 40) An air filter cartridge according to claim 40 wherein: (a) the corrugated filter media comprises a folded sheet. ### Claim 46 (depends on 40) An air filter cartridge according to claim 40 wherein: (a) the corrugated filter media forming rows of ridges have radiused curves. ### Claim 47 (depends on 40) An air filter cartridge according to claim 40 wherein: (a) the facing filter media comprises a non-corrugated sheet. ### Claim 48 (depends on 40) An air filter cartridge according to claim 40 wherein: (a) the facing filter media comprises corrugations, wherein the corrugations of the facing filter media run in a direction perpendicular to the axial direction. ### Claim 49 (depends on 40) An air filter cartridge according to claim 40 wherein: (a) the corrugated filter media and the facing filter media are alternating and are secured to each other at the first flow face and the second flow face. ### Claim 50 (depends on 42) An air filter cartridge according to claim 42 wherein: (a) at least a portion of the plurality of flutes do not extend a complete distance between the first flow face and the second flow face. ### Claim 51 (depends on 42) An air filter cartridge according to claim 42 wherein: (a) at least a portion of the plurality of flutes are closed prior to one of the first flow face and the second flow face. ### Claim 52 (depends on 51) An air filter cartridge according to claim 51 wherein: (a) the flutes closed prior to one of the first flow face and the second flow face are closed by folding the flutes closed. ### Claim 53 (depends on 42) An air filter cartridge according to claim 42 wherein: (a) at least a portion of the plurality of flutes comprise tapered flutes. ### Claim 54 (depends on 40) An air filter cartridge according to claim 40 wherein: (a) the plurality of parallel ridges comprises alternating concave ridge and convex ridge.