# US 2017/0254301 A1 · Filtering Device, Filtering Element and Maintenance Process of a Filtering Device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0254301 A1 - Document ID: US20170254301A1 - Status: Published application - Kind: A1 - Application number: 15/601,407 - Filed: 2017-05-22 - Published: 2017-09-07 - Earliest claimed: 2014-11-24 - Assignees: Mann+Hummel GmbH - Applicants: Mann+Hummel GmbH - Inventors: Marcos Marcondes; Bruna de Carvalho Vessio; Celio Santos Pereira; Gilberto Albertini - Web page: https://patentgrep.com/patent/US20170254301A1 ## CPC - F02M 35/048: {Arranging or mounting on or with respect to engines or vehicle bodies} - B01D 46/0005: {Mounting of filtering elements within casings, housings or frames (B01D46/2422 takes precedence)} - B01D 46/2411: {Filter cartridges} - B01D 46/2414: {End caps including additional functions or special forms} - B01D 46/521: {using folded, pleated material} - B01D 50/20: Combinations of devices covered by groups B01D45/00 and B01D46/00 - F02M 35/0203: {by using clamps, catches, locks or the like, e.g. for disposable plug-in filter cartridges} - F02M 35/0214: {arranged concentrically or coaxially} - F02M 35/0216: {arranged in series, e.g. pre- and main filter in series} - F02M 35/0223: {by centrifugal forces, e.g. cyclones} - F02M 35/02416: {Fixing, mounting, supporting or arranging filter elements; Filter element cartridges} - F02M 35/02483: {Cylindrical, conical, oval, spherical or the like filter elements; wounded filter elements} - F02M 35/084: {Dust collection chambers or discharge sockets, e.g. chambers fed by gravity or closed by a valve} - F02M 35/088: {Water, snow or ice proofing; Separation or drainage of water, snow or ice} - F02M 35/10013: {Means upstream of the air filter; Connection to the ambient air} - F02M 35/164: {Heavy duty vehicles, e.g. trucks, trains, agricultural or construction machines} - B01D 2265/024: Mounting aids - B01D 2265/026: with means for avoiding false mounting - Y02T 10/12: Improving ICE efficiencies - 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) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract The present invention belongs to the technical sector of fluid filtration systems which can be used for air filtration in an internal combustion engine. The invention refers to a filtering device (1) including a filtering element (24) which presents an open axial end (26) and an axial end (27) closed by a cover (28); and an intake cover (7). The said cover (28) includes at least a first tubular boss (55) projecting towards the intake cover (7); and the intake cover (7) includes at least a second tubular boss (57) complementary to the first tubular boss (55) and projecting towards the cover (28); the first tubular boss (55) is slotted in the second tubular boss (57). The invention also refers to a tubular filtering element (24) and to a maintenance process of a filtering device. ## Claims ### Claim 1 A filtering device (1), comprising: a housing body (6) which encloses a cavity within the housing body, the housing body including a filtered air outlet (8); a tubular filtering element (24) installed within the cavity and having an open axial end (26) arranged at and in flow communication with the filtered air outlet (8); and an axial end (27) closed by a cover (28); and an intake cover (7) which closes the cavity opposite the filtered air outlet (8); wherein the cover (28) includes at least a first tubular boss (55) projecting towards the intake cover (7); and at least a second tubular boss (57) complementary to the first tubular boss (55) and projecting towards the cover (28); wherein the first tubular boss (55) being slotted in the second tubular boss (57). ### Claim 2 (depends on 1) The filtering device (1) according to claim 1, wherein the second tubular boss (57) includes a bracket (58) arranged lying against the cover (28) such that the cover (28) and the intake cover (7) are held spaced apart from each other. ### Claim 3 (depends on 2) The filtering device (1) according to claim 2, wherein the first tubular boss (55) has a cavity (68) arranged along an axis of the first tubular boss. ### Claim 4 (depends on 3) The filtering device (1) according to claim 3, wherein the bracket (58) is a central bracket (58) arranged on the axis of the second cylindrical boss (57); wherein the central bracket central (58) is inserted into the cavity (68) of the first tubular boss. ### Claim 5 (depends on 3) The filtering device (1) according to claim 3, wherein the central bracket (58) is includes an exhaust hole (69). ### Claim 6 (depends on 2) The filtering device (1) according to claim 2, wherein the first tubular boss (55) presents a beveled end (56) on its edge. ### Claim 7 (depends on 6) The filtering device (1) according to claim 6, wherein the beveled end (56) is compressed at the bottom of the second tubular boss (57). ### Claim 8 (depends on 7) The filtering device (1) according to claim 7, wherein a distance between the cover (28) and the beveled end (56) is greater than a second distance between the bracket (58) and the bottom of the second tubular boss (57). ### Claim 9 (depends on 1) The filtering device (1) according to claim 1, wherein the first tubular boss (55) and the second tubular boss (57) are round in section. ### Claim 10 (depends on 1) The filtering device (1) according to claim 1, wherein the cover (28) includes two first tubular bosses (55); and the intake cover (7) includes two second tubular bosses (57). ### Claim 11 (depends on 1) The filtering device (1) according to claim 1, wherein the intake cover (7) includes a cyclone pre-cleaner. ### Claim 12 A tubular filtering element (24) having an axis extending through an interior of the filter element; an open axial end (26) opening into the interior; and an opposite axial end (27) closed by a cover (28); wherein the cover (28) includes at least a first tubular boss (55) projecting perpendicularly to the cover (28). ### Claim 13 (depends on 12) The tubular filtering element (24) according to claim 12, wherein the tubular boss (55) has a cavity (68) extending on an axis of the tubular boss. ### Claim 14 (depends on 13) The tubular filtering element (24) according to claim 13, wherein the first tubular boss (55) presents a beveled end (56) on its edge. ### Claim 15 (depends on 12) The tubular filtering element (24) according to claim 12, wherein the tubular filter element includes two of the said first tubular bosses (55). ### Claim 16 (depends on 12) The tubular filtering element (24) according to claim 12, wherein the cover (28) includes two slides (73). ### Claim 17 A method of maintaining a filtering device (1), comprising a housing body (6) which encloses a cavity within the housing body, the housing body including a filtered air outlet (8); a tubular filtering element (24) installed within the cavity and having an open axial end (26) arranged at and in flow communication with the filtered air outlet (8); and an axial end (27) closed by a cover (28); and an intake cover (7) which closes the cavity opposite the filtered air outlet (8); wherein the cover (28) includes at least a first tubular boss (55) projecting towards the intake cover (7); and at least a second tubular boss (57) complementary to the first tubular boss (55) and projecting towards the cover (28); wherein the first tubular boss (55) being slotted in the second tubular boss (57); wherein the method comprises the steps: opening the intake cover (7); withdrawing the tubular filtering element (24) from the housing body; inserting a new tubular filter element into the cavity inside the housing body (6); closing the intake cover (7) so that the first tubular boss (55) of the cover (28) is slotted into the second tubular boss (57) of the intake cover (7).