# US 11,027,596 B2 · Cabin air filter and filter element for a cabin air filter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,027,596 B2 - Document ID: US11027596B2 - Status: Granted - Kind: B2 - Application number: 16/687,961 - Filed: 2019-11-19 - Published: 2020-05-21 - Granted: 2021-06-08 - Earliest claimed: 2012-05-15 - Assignees: Mann+Hummel GmbH - Applicants: MANN+HUMMEL GmbH - Inventors: Tina Bayerlein; Peter Pekny; Elmar Riess; Emrullah Atilgan - Web page: https://patentgrep.com/patent/US11027596B2 ## CPC - B60H 3/06: Filtering - B01D 46/0005: {Mounting of filtering elements within casings, housings or frames (B01D46/2422 takes precedence)} - B01D 46/0006: {Filter elements or cartridges installed in a drawer-like manner} - B01D 46/10: Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces - B01D 46/521: {using folded, pleated material} - B01D 2271/02: Gaskets, sealings - Y10T 29/49908: Joining by deforming - B60H: ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES - 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) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A cabin air filter is provided with a filter element receptacle and a filter element having a fold pack. The fold pack has a first fold pack area having a fold height that is greater than the fold height of a second fold pack area. The filter element is inserted in an insertion direction into the filter element receptacle. The second fold pack area may form a sword that extends in the insertion direction away from a face of the filter element. The filter element has lateral strips that close off the fold pack on at least two sides of the fold pack. The sword is preferably inherently stable so that it can transmit compressive forces from the filter element to the receptacle. ## Claims ### Claim 1 A cabin air filter comprising: a filter element comprising a fold pack of a filter medium folded into a plurality of folds, the each fold extending from a first lateral side of the fold pack to an opposing second lateral side of the fold pack, the plurality of folds having a first set of fold end edges at the first lateral side, and a second set of fold end edges as the second lateral side of the fold pack; a first lateral strip arranged on, covering and closing off the first set of end edges of the plurality of folds at the first lateral side, an inner side of the first lateral strip adhesively secured directly onto the first set of end edges of the plurality of folds; a second lateral strip arranged on, covering and closing off the second set of end edges of the plurality of folds at the second lateral side, an inner side of the second lateral strip adhesively secured directly onto the second set of end edges of the plurality of folds; wherein the filter element is configured to be inserted in an insertion direction into a filter element receptacle; wherein the filter element comprises a sword that extends outwardly in the insertion direction away from the fold pack at an insertion side of the filter element, wherein the sword is embodied as a plastic part formed of at least one plastic material, the sword having: a base part arranged on an end fold of the fold pack; and a sword projection arrange on and projecting outwardly away from the base part and the fold pack; wherein the sword has an asymmetric shape that is matched to a contour of the filter element receptacle. ### Claim 2 (depends on 1) The cabin air filter according to claim 1, wherein The fold pack is surrounded by a plastic frame of plastic material injection-molded around the fold pack. ### Claim 3 (depends on 1) The cabin air filter according to claim 1, wherein the filter medium is a continuous sheet of filter medium; wherein the continuous sheet of filter medium is a two-layer filter medium or a multi-layer filter medium. ### Claim 4 (depends on 1) The cabin air filter according to claim 1, wherein the filter medium comprises activated carbon. ### Claim 5 (depends on 1) The cabin air filter according to claim 1, wherein the fold pack has a first fold; and a last fold; wherein the fold pack extends continuously from the first fold to the last fold; wherein folds of the plurality of folds have a fold length from the first set of fold end edges to the second set of fold end edges of each fold; wherein the fold pack has fold lengths what vary along the fold pack from the from the first fold to the last fold. ### Claim 6 (depends on 5) The cabin air filter according to claim 5, wherein wherein the fold pack has fold lengths that shorten consecutively from the first fold to the last fold. ### Claim 7 (depends on 1) The cabin air filter according to claim 1, further comprising a first seal strip of a seal material arranged directly on an outer side of the first lateral strip; a second seal strip of the seal material arranged directly on an outer side of the second lateral strip. ### Claim 8 (depends on 1) The cabin air filter according to claim 1, wherein the sword has a length of more than 2 cm in the insertion direction. ### Claim 9 (depends on 1) A method for installing a filter element into a filter element receptacle of a cabin air filter according to claim 1, the method comprising: providing the filter element according to claim 1; inserting the filter element into the filter element receptacle.