# US 10,865,749 B2 · Filter and filter cartridge > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,865,749 B2 - Document ID: US10865749B2 - Status: Granted - Kind: B2 - Application number: 16/427,177 - Filed: 2019-05-30 - Published: 2019-11-21 - Granted: 2020-12-15 - Earliest claimed: 2014-06-18 - Assignees: Mann+Hummel GmbH - Applicants: MANN+HUMMEL GmbH - Inventors: Michael Kaufmann; Klaus-Dieter Ruhland - Web page: https://patentgrep.com/patent/US10865749B2 ## CPC - F02M 35/02416: {Fixing, mounting, supporting or arranging filter elements; Filter element cartridges} - B01D 45/16: generated by the winding course of the gas stream {, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes} - B01D 46/0005: {Mounting of filtering elements within casings, housings or frames (B01D46/2422 takes precedence)} - B01D 46/10: Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces - B01D 46/4227: {Manipulating filters or filter elements, e.g. handles or extracting tools} - B01D 46/522: {with specific folds, e.g. having different lengths} - B01D 46/62: connected in series - B01D 50/20: Combinations of devices covered by groups B01D45/00 and B01D46/00 - F02M 35/0201: {Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof} - F02M 35/0216: {arranged in series, e.g. pre- and main filter in series} - F02M 35/024: using filters, e.g. moistened (F02M35/026 takes precedence; cleaning of the filtering material F02M35/08) - F02M 35/0245: {Pleated, folded, corrugated filter elements, e.g. made of paper} - F02M 35/02475: {characterised by the shape of the filter element} - F02M 35/02491: {Flat filter elements, e.g. rectangular} - F02M 35/08: with means for removing dust, {particles or liquids} from cleaners; with means for indicating clogging; with by-pass means; {Regeneration of cleaners} - F02M 35/084: {Dust collection chambers or discharge sockets, e.g. chambers fed by gravity or closed by a valve} - F02M 35/104: Intake manifolds - B01D 2271/022: Axial sealings - B01D 2271/027: Radial sealings - B01D 2275/206: Special forms, e.g. adapted to a certain housing - B01D 2279/30: for treatment of exhaust gases from IC Engines - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF - 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 A filter cartridge for a filter for filtration of a fluid has a prismatic basic shape with a base face and a top face arranged parallel to each other and each having a polygonal basic shape. The prismatic basic shape is provided with a first lateral face and a second lateral face neighboring the first lateral face, wherein the first lateral face is an inflow surface and is substantially positioned perpendicular to the neighboring second lateral face. The prismatic basic shape has a third lateral face that is an outflow surface and is positioned at an angle relative to the first lateral face, wherein the angle is greater than 10° and smaller than 80°. A filter with such a filter cartridge is disclosed. ## Claims ### Claim 1 A filter cartridge for a filter for filtration of a fluid, the filter cartridge comprising: a prismatic basic shape comprising a base face and a top face arranged parallel to each other and each having a polygonal basic shape; the prismatic basic shape further comprising a first lateral face and a second lateral face neighboring the first lateral face, wherein the first lateral face is an inflow surface and is substantially positioned perpendicular to the neighboring second lateral face; the prismatic basic shape further comprising a third lateral face that is an outflow surface and is positioned at an angle relative to the first lateral face, wherein the angle is greater than 10° and smaller than 80°; wherein the polygonal basic shape is a quadrangle and comprises a fourth lateral face positioned parallel to and opposite the second lateral face; the filter cartridge further comprising: a filter cartridge frame; a seal arranged in the area of the outflow surface and configured to separate a filter interior into a clean side and a raw side, the seal having a sealing surface extending parallel to the outflow surface; and a spacer structure configured to determine a spacing between the filter cartridge frame and a further downstream filter cartridge; wherein the filter cartridge frame has a contact surface configured and adapted to support a support surface of a blade projecting from a housing cover, the contact surface being parallel to the sealing surface. ### Claim 2 (depends on 1) The filter cartridge according to claim 1, wherein the seal is an axially acting seal, the sealing surface facing in a direction away from the outflow surface, the contact surface facing in the opposite direction. ### Claim 3 (depends on 1) The filter cartridge according to claim 1, further comprising a zigzag-shaped folded filter medium comprising folds. ### Claim 4 (depends on 3) The filter cartridge according to claim 3, wherein the folds comprise outer fold edges, positioned on the first lateral face, and further comprise inner fold edges, wherein the inner fold edges are positioned opposite the outer fold edges and are positioned on the third lateral face. ### Claim 5 (depends on 3) The filter cartridge according to claim 3, wherein the folds each have a depth and the depth of the folds differs among the folds that are neighboring each other. ### Claim 6 (depends on 3) The filter cartridge according to claim 3, wherein the depth of the folds at the second lateral face is different from the depth of the folds at the fourth lateral face. ### Claim 7 (depends on 3) The filter cartridge according to claim 3, wherein the depth of the folds changes continuously from the second lateral face toward the fourth lateral face. ### Claim 8 (depends on 3) The filter cartridge according to claim 3, wherein the folds comprise a first end face and a second end face, wherein the first end face of the folds is positioned on the base face and the second end face of the folds is positioned on the top face. ### Claim 9 (depends on 1) The filter cartridge according to claim 1, wherein the spacer structure is formed integrally with the seal. ### Claim 10 (depends on 1) A filter comprising a filter cartridge according to claim 1, wherein a main inflow direction of the filter and a main outflow direction of the filter are positioned at an angle of more than 30° relative to each other. ### Claim 11 (depends on 1) The filter according to claim 1, wherein a main inflow direction of the filter is parallel and displaced relative to a main outflow direction of the filter. ### Claim 12 (depends on 1) A filter comprising a main filter cartridge and a secondary filter cartridge, wherein at least one of the main filter cartridge and of the secondary filter cartridge is embodied according to claim 1. ### Claim 13 A filter cartridge for a filter for filtration of a fluid, the filter cartridge comprising: a prismatic basic shape comprising a base face and a top face arranged parallel to each other and each having a polygonal basic shape; the prismatic basic shape further comprising a first lateral face and a second lateral face neighboring the first lateral face, wherein the first lateral face is an inflow surface and is substantially positioned perpendicular to the neighboring second lateral face; the prismatic basic shape further comprising a third lateral face that is an outflow surface and is positioned at an angle relative to the first lateral face, wherein the angle is greater than 10° and smaller than 80°; wherein the polygonal basic shape is a quadrangle and comprises a fourth lateral face positioned parallel to and opposite the second lateral face: the filter cartridge further comprising: a filter cartridge frame; a seal arranged in the area of the outflow surface and configured to separate a filter interior into a clean side and a raw side, the seal having a sealing surface extending parallel to the outflow surface; wherein the filter cartridge frame has a contact surface configured and adapted to support a support surface of a blade projecting from a housing cover, the contact surface being parallel to the sealing surface; wherein the filter cartridge further comprises: a filter body; a filter cartridge frame supporting the filter body; an edge protection disposed on the filter cartridge frame in the area of the inflow surface and circumferentially surrounding externally the filter body, wherein the edge protection connects the filter body and the filter cartridge frame detachably or non-detachably to each other. ### Claim 14 A filter comprising: a filter housing comprising a raw-side area and a clean-side area; a main filter cartridge for a filter for filtration of a fluid, the main filter cartridge comprising: a prismatic basic shape comprising a base face and a top face arranged parallel to each other and each having a polygonal basic shape; the prismatic basic shape further comprising a first lateral face and a second lateral face neighboring the first lateral face, wherein the first lateral face is a main filter cartridge inflow surface and is substantially positioned perpendicular to the neighboring second lateral face; the prismatic basic shape further comprising a third lateral face that is a main filter cartridge outflow surface and is positioned at an angle relative to the first lateral face, wherein the angle is greater than 10° and smaller than 80°; wherein the polygonal basic shape is a quadrangle and comprises a fourth lateral face positioned parallel to and opposite the second lateral face; the main filter cartridge further comprising: a filter cartridge frame; a seal arranged in the area of the main filter cartridge outflow surface and configured to separate a filter interior into a clean side and a raw side, the seal having a sealing surface extending parallel to the outflow surface; wherein the filter cartridge frame has a contact surface configured and adapted to support a support surface of a blade projecting from a housing cover, the contact surface being parallel to the sealing surface; wherein the main filter cartridge is configured to be disposed in the filter housing, wherein the main filter cartridge comprises a main filter cartridge flow direction from the main filter cartridge inflow surface to the main filter cartridge outflow surface, and a seal arranged on a sealing surface of the main filter cartridge and configured to fluid-tightly separate the raw-side area and the clean-side area of the filter housing from each other when the main filter cartridge is arranged in the filter housing; a secondary filter cartridge arranged downstream of the main filter cartridge in the main filter cartridge flow direction, wherein the secondary filter cartridge comprises a secondary filter cartridge inflow surface, a secondary filter cartridge outflow surface, and a secondary filter cartridge flow direction from the secondary filter cartridge inflow surface to the secondary filter cartridge outflow surface; wherein the sealing surface is arranged at a slant relative to the main filter cartridge flow direction of the main filter cartridge. ### Claim 15 (depends on 14) The filter according to claim 14, wherein the sealing surface and the main filter cartridge flow direction are positioned at an angle relative to each other that is between 80° and 10°. ### Claim 16 (depends on 14) The filter according to claim 14, wherein the sealing surface and the main filter cartridge outflow surface extend parallel to each other. ### Claim 17 (depends on 14) The filter according to claim 14, wherein the secondary filter cartridge inflow surface extends parallel and spaced apart at a spacing relative to the sealing surface. ### Claim 18 (depends on 17) The filter according to claim 17, wherein the spacing of the secondary filter cartridge inflow surface relative to the sealing surface is less than 2 cm. ### Claim 19 (depends on 14) The filter according to claim 14, wherein the secondary filter cartridge has a basic shape of a parallelepiped. ### Claim 20 (depends on 14) The filter according to claim 14, wherein the main filter cartridge has a basic shape of a prism with a base face shaped as a quadrangle and a top face shaped as a quadrangle. ### Claim 21 (depends on 14) The filter according to claim 14, wherein the main filter element comprises a folded bellows with at least two different fold depths. ### Claim 22 (depends on 14) The filter according to claim 14, wherein the filter housing comprises an inflow direction, an outflow direction, an outflow area with an outflow opening, and an outflow socket configured to be attached to the outflow area, wherein the outflow area comprises a fastening surface for the outflow socket, and wherein the fastening surface is positioned at an angle of 45° relative to the main filter cartridge flow direction. ### Claim 23 (depends on 22) The filter according to claim 22, wherein the outflow socket is formed such that a deflection of a flow direction by 45° results. ### Claim 24 (depends on 22) The filter according to claim 22, wherein the outflow socket is embodied with rotational symmetry and comprises a fastening area configured to be attached to the filter housing. ### Claim 25 (depends on 22) The filter according to claim 22, wherein the outflow direction of the filter housing and the fastening surface of the outflow area are positioned at an angle of 45° relative to each other. ### Claim 26 (depends on 22) The filter according to claim 22, wherein the fastening surface of the outflow area and the secondary filter cartridge outflow surface extend parallel to each other. ### Claim 27 (depends on 14) The filter according to claim 14, wherein the main filter cartridge is insertable and removable into and from the filter housing along an insertion axis, wherein the insertion axis is positioned relative to the main filter cartridge flow direction at an angle that is between a 90° angle and the angle at which the sealing surface of the main filter cartridge and the main filter cartridge flow direction are positioned relative to each other, wherein the filter housing comprises a cover that is designed such that, in the state in which the cover closes off the filter housing, the cover exerts a force on the main filter cartridge in the direction toward the sealing surface. ### Claim 28 (depends on 15) The filter according to claim 15, wherein the filter housing comprises a housing cover, the cover comprising two wedge shaped blades that project from the cover, laterally relative to the main filter element, into the filter housing, the blades having support surfaces on their narrow sides, respectively. ### Claim 29 (depends on 28) The filter according to claim 28, wherein the blades each comprise first and second, opposite support surfaces. ### Claim 30 (depends on 29) The filter according to claim 29, wherein the support surfaces of the blades are positioned relative to each other at an angle which corresponds to the angle between inflow surface and outflow or sealing surface.