# US 2019/0168151 A1 · Filter assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0168151 A1 - Document ID: US20190168151A1 - Status: Published application - Kind: A1 - Application number: 16/204,717 - Filed: 2018-11-29 - Published: 2019-06-06 - Earliest claimed: 2017-12-01 - Assignees: Dyson Technology Limited - Applicants: Dyson Technology Limited - Inventors: Jack Cyril BILTCLIFFE; Jake John READ; Ben LOWSON; Christopher David SELWAY - Web page: https://patentgrep.com/patent/US20190168151A1 ## CPC - B01D 46/0005: {Mounting of filtering elements within casings, housings or frames (B01D46/2422 takes precedence)} - B01D 46/103: {Curved filtering elements} - B01D 46/2403: {characterised by the physical shape or structure of the filtering element} - B01D 46/521: {using folded, pleated material} - B01D 46/58: connected in parallel - B01D 46/64: arranged concentrically or coaxially - B01D 46/645: {Protecting screens at filter inlet or outlet} - F04D 25/08: the working fluid being air, e.g. for ventilation - F04D 29/403: {especially adapted for elastic fluid pumps} - F04D 29/703: {specially for fans, e.g. fan guards} - F04F 5/16: displacing elastic fluids - B01D 2273/30: Means for generating a circulation of a fluid in a filtration system, e.g. using a pump or a fan - 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) - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - F04F: PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED {(evacuating by sorption F04B)}; SIPHONS {(conveying materials in bulk by flows of gas, liquid of foam B65G53/00)} ## Abstract There is provided a filter assembly arranged to be mounted over the air inlet of a fan assembly, the filter assembly comprising a filter frame arranged to support one or more filter media. The filter frame is provided with a first engagement member on a first edge of the filter frame and a second engagement member on a second edge of the filter frame, the first edge being opposite to the second edge. The first engagement member and the second engagement member are each configured to be engaged by a respective retention assembly when mounted on the fan assembly. ## Claims ### Claim 1 A filter assembly arranged to be mounted over the air inlet of a fan assembly, the filter assembly comprising: a filter frame arranged to support one or more filter media; wherein the filter frame is provided with a first engagement member on a first edge of the filter frame and a second engagement member on a second edge of the filter frame, the first edge being opposite to the second edge; and wherein the first engagement member and the second engagement member are each configured to be engaged by a respective retention assembly when mounted on the fan assembly. ### Claim 2 (depends on 1) The filter assembly of claim 1, wherein the filter frame has two-fold rotational symmetry such that the filter frame can be retained on the fan assembly in either of two opposing orientations. ### Claim 3 (depends on 1) The filter assembly of claim 1, wherein the first engagement member provided on the first edge of the filter frame is located towards a first end of the filter frame, and the second engagement member provided on the second edge of the filter frame is located towards an opposing, second end of the filter frame. ### Claim 4 (depends on 3) The filter assembly of claim 3, wherein a distance between the first engagement member and the first end of the filter frame is equal to a distance between the second engagement member and the second end of the filter frame. ### Claim 5 (depends on 1) The filter assembly of claim 1, wherein the first engagement member is adjacent to a first corner of the filter frame and the second engagement member is adjacent to a diagonally opposing second corner of the filter frame. ### Claim 6 (depends on 1) The filter assembly of claim 1, wherein the first engagement member and the second engagement member each comprise a pair of hooks that face in opposing directions. ### Claim 7 (depends on 6) The filter assembly of claim 6, wherein each hook comprises a projection extending from the filter frame having a distal end that is angled relative to a proximal end, the distal end extending in a direction that is parallel to the longitudinal axis of the filter frame. ### Claim 8 (depends on 7) The filter assembly of claim 7, wherein each pair of hooks comprises a single projection extending from the filter frame having a distal end comprising a pair of angled portions that are parallel to the longitudinal axis of the filter frame and that extend in opposing directions. ### Claim 9 (depends on 1) The filter assembly of claim 1, wherein the filter frame is provided with a first side flange that extends along a first side of the filter frame and a second side flange that extends along a second side of the filter frame. ### Claim 10 (depends on 9) The filter assembly of claim 9, wherein the first engagement member is provided on the first side flange and the second engagement member is provided on the second side flange. ### Claim 11 (depends on 1) The filter assembly of claim 1, wherein the filter frame is provided with a first end flange that extends along a first end of the filter frame and a second side flange that extends along a second end of the filter frame, the first end flange and the second end flange being arranged to support the one or more filter media. ### Claim 12 (depends on 1) The filter assembly of claim 1, wherein the filter frame is provided with a seal that extends around the entirety of an inner periphery of the filter frame. ### Claim 13 (depends on 12) The filter assembly of claim 12, wherein the filter frame is provided with a recess that that extends around the entirety of the inner periphery of the filter frame and that is arranged to received and support the seal. ### Claim 14 (depends on 13) The filter assembly of claim 13, wherein the recess extends across an inner surface of both the first side flange and second side flange, and across an inner edge of both the first end and the second end of the filter frame. ### Claim 15 (depends on 1) The filter assembly of claim 1, and further comprising: a first retention member provided on a first end of the filter frame and a second retention member provided on an opposing, second end of the filter frame, wherein the first retention member and the second rotation member are arranged to releas ably retain a shroud when mounted on the filter assembly. ### Claim 16 (depends on 15) The filter assembly of claim 15, wherein each of the first retention member and the second retention member comprise a resilient catch or hook that is arranged to engage a corresponding through-hole provided on the shroud. ### Claim 17 (depends on 16) The filter assembly of claim 16, wherein the resilient catch or hook comprises a resilient arm, a distal end of the resilient arm being provided with a sloped projection, wherein the sloped projection slopes towards the distal end of the resilient arm/tab. ### Claim 18 (depends on 15) The filter assembly of claim 15, wherein the filter frame is provided with one or more alignment ribs that are arranged to cooperate with a corresponding track or channel or groove provided on the shroud in order to guide the shroud onto the filter frame. ### Claim 19 (depends on 18) The filter assembly of claim 18, wherein the one or more alignment ribs is straight and extends in a direction that is parallel to a longitudinal plane that bisects the filter frame. ### Claim 20 (depends on 18) The filter assembly of claim 18, wherein the filter frame is provided with at least one alignment rib on each end of the filter frame. ### Claim 21 (depends on 20) The filter assembly of claim 20, wherein the filter frame is provided with a first end flange that extends along a first end of the filter frame and a second side flange that extends along a second end of the filter frame, the first end flange and the second end flange being arranged to support the one or more filter media, and the first end flange and the second end flange of the filter frame are each provided with a pair of alignment ribs. ### Claim 22 (depends on 21) The filter assembly of claim 21, wherein the first end flange and the second end flange of the filter frame are each provided with a further pair of alignment ribs. ### Claim 23 (depends on 1) The filter assembly of claim 1, wherein the filter assembly is semi-cylindrical in shape. ### Claim 24 (depends on 1) The filter assembly of claim 1, wherein the edges of the filter frame are parallel to the longitudinal axis of the filter frame and the ends of the filter frame are perpendicular to a longitudinal axis of the of the filter frame and have an arc-shaped cross section in a plane perpendicular to longitudinal axis.