# US 11,027,227 B2 · Treatment device for treating fluids, in particular liquid fluids, and treatment element of treatment device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,027,227 B2 - Document ID: US11027227B2 - Status: Granted - Kind: B2 - Application number: 16/558,428 - Filed: 2019-09-03 - Published: 2020-02-20 - Granted: 2021-06-08 - Earliest claimed: 2013-12-19 - Assignees: Mann+Hummel GmbH - Applicants: MANN+HUMMEL GmbH - Inventors: Christian Thalmann; Robert Hasenfratz; Fabian Wagner; André Roesgen; Frank Pflueger - Web page: https://patentgrep.com/patent/US11027227B2 ## CPC - B01D 27/103: {Bypass or safety valves} - B01D 27/06: with corrugated, folded or wound material - B01D 35/005: {Filters specially adapted for use in internal-combustion engine lubrication or fuel systems} - B01D 35/147: Bypass or safety valves - B01D 35/306: {Filter mounting adapter} - B01D 2201/4015: Bayonet connecting means - B01D 2201/4092: Threaded sections, e.g. screw - 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 device for treating fluids, in particular for filtering fluids such as fuel, oil, or water, has a housing (56) with a housing pot (58), a housing cover (60), at least one inlet (88) for the fluid to be treated, and at least one outlet (82) for the treated fluid. A connecting head (12) has at least one feed (16) for the fluid to be treated and connectable to the at least one inlet (88), and/or at least one discharge (18). The connecting head (12) and the treatment element (14) can be connected to each other by means of a releasable bayonet-type connecting device (34) through the execution of a rotational/plug-in movement about a connecting axis (20) of the treatment device (10). ## Claims ### Claim 1 A treatment element (14) of a treatment device for treating and/or filtering fluids, comprising: a filter bellows (66) of a filter medium; a housing (56) comprising; a housing pot (58) having a peripheral outer wall surrounding a connecting axis of the treatment element, the housing pot (58) is open end at a first axial end of the housing pot; wherein the filter bellows (66) is arranged in an interior of the housing pot (58); a housing cover (60) permanently fixed onto the housing pot (58) at the open end of the housing pot, the housing cover (60) retaining the filter bellows (66) within the interior of the housing pot (58); at least one inlet (88) for the fluid to be treated; and at least one outlet (82) for the treated fluid; wherein the treatment element (14) is configured to connect to a connecting head (12) of the treatment device (10) by means of a releasable bayonet-type connecting device (34) through the execution of a rotational/plug-in movement about the connecting axis (20) of the treatment device (10); the connecting device (34) having a housing connecting part (100) arranged at the open end of the housing pot (58), the connecting device configured to interact with at least one head connecting part (32) of the connecting head (12) for the purpose of connecting the connecting device (34); wherein the at least one inlet (88) can be connected to at least one feed (16) of the connecting head (12) for the fluid to be treated and/or the at least one outlet (82) can be connected to at least one discharge (18) of the connecting head (12) for the treated fluid; wherein the housing connecting part (100) is arranged axially between an axial outer surface of the housing cover (60) and the first axial end of the housing pot (58), the housing connecting part having: a radial outer portion of the housing connecting part (100) forming a housing mount section (102) that rests against the axial outer surface of the housing cover (60), the housing mounting section arranged in the interior of the peripheral outer wall of the housing pot (58); a radial inner portion of the housing connecting part (100) forming a plurality of housing-side bayonet sections (104) which project radially inwardly from the housing mount section (102), the housing-side bayonet sections (104) are spaced apart circumferentially about the connecting axis (20); wherein each of the plurality of housing-side bayonet sections (104), in a circumferential direction, rise axially outwardly away from the housing cover (60) towards a latching projection formed at a circumferential end of the plurality of housing- side bayonet sections (104); and each of the plurality of housing-side bayonet sections (104) having, on axially opposite sides, an inner functional surface (106) and an outer functional surface (108), the functional surfaces extending helically about the connecting axis (20), the plurality of housing-side bayonet sections (104) spaced circumferentially apart from each other; and a sealing ring (96) arranged on the housing cover (60) and spaced radially inwardly away from the housing connecting part (100), for sealing a fluid-carrying region of the treatment device to an outside environment. ### Claim 2 (depends on 1) The treatment element (14) according to claim 1, wherein the housing connecting part (100) is attached to the housing by means of a crimped connection between the housing cover and the housing pot. ### Claim 3 (depends on 1) The treatment element (14) according to claim 1, wherein the housing cover (60) comprises sheet metal. ### Claim 4 (depends on 1) The treatment element (14) according to claim 1, wherein a material thickness of the housing cover (60) is 0.4 to 1 mm. ### Claim 5 (depends on 1) The treatment element (14) according to claim 1, wherein the housing cover (60) includes a coaxial outer sealing connecting piece (92) surrounding the at least one inlet (88), and wherein the sealing ring (96) is arranged on the coaxial outer sealing connecting piece (92); the sealing ring (96) projects upward by up to 5 mm in the axial direction beyond an uppermost point of the housing connecting part (100) in the axial direction, and projects downward by up to 5 mm in the axial direction beyond a lowermost point of the housing connecting part (100) in the axial direction. ### Claim 6 (depends on 1) The treatment element according to claim 1, wherein the at least one head connecting part (32) comprises sheet metal. ### Claim 7 (depends on 1) The treatment element (14) according to claim 1, wherein the material thickness of the housing connecting part (100) is at most 3 mm. ### Claim 8 A treatment device (10) for filtering fluids comprising: a treatment element (14) comprising: a filter bellows (66) of a filter medium; a housing (56) comprising: a housing pot (58) having a peripheral outer wall surrounding a connecting axis of the treatment element, the housing pot (58) is open end at a first axial end of the housing pot; wherein the filter bellows (66) is arranged in an interior of the housing pot (58); a housing cover (60) permanently fixed onto the housing pot (58) at the open end of the housing pot, the housing cover (60) retaining the filter bellows (66) within the interior of the housing pot (58); at least one inlet (88) for the fluid to be treated; and at least one outlet (82) for the treated fluid; a releasable bayonet-type connecting device (34) having a housing connecting part (100) arranged at the open end of the housing pot (58), the connecting device configured to interact with at least one head connecting part (32) of a connecting head (12) for the purpose of connecting the connecting device (34); wherein the treatment element (14) is connected to the connecting head (12) of the treatment device (10) by means of the releasable bayonet-type connecting device (34) through the execution of a rotational/plug-in movement about the connecting axis (20) of the treatment device (10); the connecting head (12) comprising: at least one feed (16) for the fluid to be treated, said feed being connectable to the at least one inlet (88), and/or at least one discharge (18) for the treated fluid, said discharge being connectable to the at least one outlet (82); wherein the connecting head (12) and the treatment element (14) are connected to each other by means of the releasable bayonet-type connecting device (34) through the execution of a rotational/plug-in movement about the connecting axis (20) of the treatment device (10); and wherein at least one head second connecting part (32) has at least one counter functional surface (44) that engages one of the functional surfaces (106) of the connecting part (100) from behind; wherein the material thickness of the housing connecting part (100) is constant at least in the region of the at least one functional surface (106, 108); wherein the housing connecting part (100) is arranged axially between an axial outer surface of the housing cover (60) and the first axial end of the housing pot (58), the housing connecting part having: a radial outer portion of the housing connecting part (100) forming a housing mount section (102) that rests against the axial outer surface of the housing cover (60), the housing mounting section arranged in the interior of the peripheral outer wall of the housing pot (58); a radial inner portion of the housing connecting part (100) forming a plurality of housing-side bayonet sections (104) which project radially inwardly from the housing mount section (102), the housing-side bayonet sections (104) are spaced apart circumferentially about the connecting axis (20); wherein each of the plurality of housing-side bayonet sections (104), in a circumferential direction, rise axially outwardly away from the housing cover (60) towards a circumferential end of the plurality of housing-side bayonet sections (104); and each of the plurality of housing-side bayonet sections (104) having, on axially opposite sides, an inner functional surface (106) and an outer functional surface (108), the inner or outer functional surfaces extending helically about the connecting axis (20), the plurality of housing-side bayonet sections (104) spaced circumferentially apart from each other; and a sealing ring (96) arranged on the housing cover (60) and spaced radially inwardly away from the housing connecting part (100), for sealing a fluid-carrying region of the treatment device to an outside environment. ### Claim 9 (depends on 8) The treatment device (10) according to claim 8, wherein the housing cover (60) includes a coaxial outer sealing connecting piece (92) surrounding the at least one inlet (88), and having the sealing ring (96) arranged on the coaxial outer sealing connecting piece (92); wherein the sealing ring (96) projects upward by up to 5 mm in the axial direction beyond an uppermost point of the housing connecting part (100) in the axial direction, and projects downward by up to 5 mm in the axial direction beyond a lowermost point of the housing connecting part (100) in the axial direction. ### Claim 10 (depends on 9) The treatment device (10) according to claim 9, wherein the sealing ring (96) is arranged radially within the housing connecting part (100). ### Claim 11 (depends on 8) The treatment device according to claim 8, wherein the at least one counter functional surface (44) and the inner functional surface (106) of the plurality of housing-side bayonet sections (104) interacting therewith each comprise at least one latch element (46, 110) as a latching projection. ### Claim 12 (depends on 8) The treatment device according to claim 8, wherein the connecting device (34) comprises at least one biasing element (54; 190) for realizing a mechanical biasing with which the at least one counter functional surface (44) is pressed against the inner functional surface (106). ### Claim 13 (depends on 8) The treatment device according to claim 8, wherein a material thickness of the at least one head connecting part (32) and/or the housing connecting part (100) is at most 3 mm. ### Claim 14 (depends on 8) The treatment device according to claim 8, wherein an axial extension of the at least one insert gap (50) is at most 3 mm. ### Claim 15 (depends on 8) The treatment device according to claim 8, wherein the at least one head connecting part (32) and/or the housing connecting part (100) comprise(s) sheet metal.