# US 10,864,475 B2 · Air filter arrangement; 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 10,864,475 B2 - Document ID: US10864475B2 - Status: Granted - Kind: B2 - Application number: 16/119,121 - Filed: 2018-08-31 - Published: 2018-12-27 - Granted: 2020-12-15 - Earliest claimed: 2005-01-13 - Assignees: Donaldson Company, Inc. - Applicants: Donaldson Company, Inc. - Inventors: Gregory L. Reichter; Wayne R. W. Bishop; Benny K. Nelson; Darrel Wegner; Bruce Crenshaw; Vladimir Kladnitsky; Donald Raymond Mork; Kevin Schrage; Richard J. Osendorf; Bradley A. Kuempel; Thomas J. Lundgren; Jordan S. Flagstad - Web page: https://patentgrep.com/patent/US10864475B2 ## CPC - B01D 46/526: {in stacked arrangement} - B01D 46/0005: {Mounting of filtering elements within casings, housings or frames (B01D46/2422 takes precedence)} - B01D 2271/022: Axial sealings - 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) ## Abstract An air cleaner arrangement is shown. The air cleaner arrangement includes a serviceable filter cartridge. A preferred filter cartridge positionable within an air cleaner arrangement, is depicted. ## Claims ### Claim 1 An air filter cartridge comprising: (a) a filter media pack having first and second, opposite, flow faces, and having an axial direction extending from the first flow face to the second flow face; (i) the filter media pack comprising sets of axially extending flow channels, wherein a set of axially extending flow channels is located between axially extending sheets of media, and at least one of the axially extending sheets of media comprises fold lines forming the set of axially extending flow channels; (ii) the first and second, opposite, flow faces being generally planar and parallel to one another; and (iii) the media pack having a shape with: a first cross-dimension perpendicular to a direction between the first and second, opposite, flow faces; and, a second cross-dimension, perpendicular to a direction between the first and second, opposite, flow faces and also perpendicular to the first cross-dimension; and, (b) a housing seal arrangement comprising a perimeter seal extending around the media pack; (i) the housing seal arrangement including a pinch seal; (ii) the pinch seal having a first, end, pinch seal surface in complete extension around the media pack; (A) the first, end, pinch seal surface being an end surface facing generally in the same direction as one of the first flow face and second flow face; and, (B) the housing seal arrangement being configured such that a portion of the first, end, pinch seal surface, in extension in a direction corresponding to the first cross-dimension, varies in distance from the second flow face, in at least selected locations. ### Claim 2 (depends on 1) An air filter cartridge according to claim 1 wherein: (a) the first, end, pinch seal surface is positioned spaced from each of the first and second, opposite, flow faces; and, (b) the first, end, pinch seal surface includes opposite long side sections extending in the direction at the first cross-dimension; (i) the opposite long sections being parallel to one another and extending at an angle Y of greater than zero, relative to the outlet flow face. ### Claim 3 (depends on 2) An air filter cartridge according to claim 2 wherein: (a) the angle Y is not greater than 45°. ### Claim 4 (depends on 2) An air filter cartridge according to claim 2 wherein: (a) the angle Y is at least 5°. ### Claim 5 (depends on 2) An air filter cartridge according to claim 2 wherein: (a) the first, end, seal surface includes opposite short side sections extending between the opposite long sections. ### Claim 6 (depends on 5) An air filter cartridge according to claim 5 wherein: (a) each of the opposite short side sections extends in a direction parallel to the outlet flow face, in a direction of extension between the opposite long sections. ### Claim 7 (depends on 6) An air filter cartridge according to claim 6 wherein: (a) the filter media pack has rectangular cross-sectional shape. ### Claim 8 (depends on 7) An air filter cartridge according to claim 7 wherein: (a) the filter media pack comprises a stack of alternating strips of fluted media and facing media. ### Claim 9 (depends on 1) An air filter cartridge according to claim 1 wherein: (a) the filter media pack has rectangular cross-sectional shape. ### Claim 10 (depends on 9) An air filter cartridge according to claim 9 wherein: (a) the filter media pack comprises a stack of alternating strips of fluted media and facing media. ### Claim 11 (depends on 1) An air filter cartridge according to claim 1 wherein: (a) the housing seal arrangement comprises a pinch seal having a pinch seal flange and a pinch seal base; (i) the pinch seal flange and pinch seal base defining a receiving trough between a portion of the pinch seal base and the media pack. ### Claim 12 (depends on 1) An air filter cartridge according to claim 1 wherein: (a) at least 10% of a volume of the media pack is positioned on each side of the pinch seal arrangement. ### Claim 13 (depends on 1) An air filter cartridge according to claim 1 wherein: (a) at least 15% of a volume of the media pack is positioned on each side of the pinch seal arrangement. ### Claim 14 (depends on 1) An air filter cartridge according to claim 1 wherein: (a) a distance between the inlet and outlet flow faces is greater than the second cross-dimension. ### Claim 15 (depends on 1) An air filter cartridge according to claim 1 wherein: (a) the filter media pack includes a pair of opposite sides, each of which is embedded in a molded-in-place panel. ### Claim 16 (depends on 15) An air filter cartridge according to claim 15 wherein: (a) the filter media pack includes a second pair of opposite sides extending between the first pair of opposite sides and in the direction of the first cross-dimension; (i) each of the second pair of opposite sides being covered by a sheet of material. ### Claim 17 (depends on 1) An air filter cartridge according to claim 1 wherein: (a) the first cross-dimension being longer than the second cross-dimension. ### Claim 18 (depends on 1) An air filter cartridge according to claim 1 wherein: (a) the filter media pack wherein the axially extending sheet of media forming fold lines comprises fluted media. ### Claim 19 (depends on 18) An air filter cartridge according to claim 18 wherein: (a) the other axially extending sheet of media comprises facing media. ### Claim 20 (depends on 19) An air filter cartridge according to claim 19 wherein: (a) the facing media comprises non-corrugated media. ### Claim 21 (depends on 19) An air filter cartridge according to claim 19 wherein: (a) the facing media comprises corrugated media. ### Claim 22 (depends on 1) An air filter cartridge according to claim 1 wherein: (a) the axial flow channels comprise inlet flow channels open to flow at the first flow face and closed to flow at the second flow face, and outlet flow channels closed to flow at the first flow face and open to flow at the second flow face. ### Claim 23 (depends on 19) An air filter cartridge according to claim 19 wherein: (a) the filter media pack comprises alternating fluted media and facing media. ### Claim 24 (depends on 23) An air filter cartridge according to claim 23 wherein: (a) the alternating fluted media and facing media are secured to each other at one of the first flow face and the second flow faces. ### Claim 25 (depends on 23) An air filter cartridge according to claim 23 wherein: (a) the alternating fluted media and facing media comprises a stack of alternating strips of a fluted media sheet secured to a facing media sheet. ### Claim 26 An air filter cartridge comprising: (a) a filter media pack having first and second flow faces, and having an axial direction extending from the first flow face to the second flow face; (ii) the media pack having a shape with: a first cross-dimension perpendicular to a direction between the first and second, opposite, flow faces; and, a second cross-dimension, perpendicular to a direction between the first and second, opposite, flow faces and also perpendicular to the first cross-dimension; and, (b) a housing seal arrangement comprising a perimeter seal extending around the media pack; (i) the housing seal arrangement including a pinch seal; (ii) the pinch seal having a first, end, pinch seal surface in complete extension around the media pack; (A) the first, end, pinch seal surface being an end surface facing generally in the same direction as one of the first flow face and second flow face; (B) the housing seal arrangement being configured such that a portion of the first, end, pinch seal surface, in extension in a direction corresponding to the first cross-dimension, varies in distance from the second flow face, in at least selected locations; and, (C) the pinch seal surface is positioned spaced from each of the first and second, opposite, flow faces. ### Claim 27 (depends on 26) An air filter cartridge according claim 26 wherein: (a) the media comprises alternating fluted media and facing media. ### Claim 28 (depends on 26) An air filter cartridge according to claim 26 wherein: (a) the first, end, pinch seal surface is positioned spaced from each of the first and second, opposite, flow faces; and, (b) the first, end, pinch seal surface includes opposite long side sections extending in the direction of the first cross-dimension along an angle Y, relative to a direction between the flow faces. ### Claim 29 (depends on 26) An air filter cartridge according to claim 26 wherein: (a) the housing seal arrangement comprises a pinch seal having a pinch seal flange and a pinch seal base; (i) the pinch seal flange and pinch seal base defining a receiving trough between a portion of the pinch seal base and the media pack. ### Claim 30 (depends on 26) An air filter cartridge according to claim 26 wherein: (a) the first cross-dimension being longer than the second cross-dimension.