# US 7,744,668 B2 · Multi-cyclone dust separating apparatus of vacuum cleaner > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,744,668 B2 - Document ID: US7744668B2 - Status: Granted - Kind: B2 - Application number: 12/077,129 - Filed: 2008-03-17 - Published: 2009-05-07 - Granted: 2010-06-29 - Earliest claimed: 2007-11-05 - Assignees: Samsung Gwangju Electronics Co., Ltd. - Inventors: Jank-keun Oh; Min-ha Kim - Web page: https://patentgrep.com/patent/US7744668B2 ## CPC - B04C 5/185: Dust collectors - A47L 9/1625: {for series flow} - A47L 9/1641: {for parallel flow} - A47L 9/1691: {Mounting or coupling means for cyclonic chamber or dust receptacles} - B04C 5/04: Tangential inlets - B04C 5/26: for series flow - Y10S 55/03: Vacuum cleaner - B04C: APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES ({centrifugal separation of water from steam B01D45/12;} jet mills B02C19/06; {wind sifters B07B7/00;} cyclonic type combustion apparatus F23; {vortex burners for cyclone-type combustion apparatus F23D1/02; cyclonic type combustion apparatus for gas turbines F23R3/00}) - A47L: DOMESTIC WASHING OR CLEANING (brushes A46B; cleaning quantities of bottles or of other hollow articles of one kind B08B9/00; laundry D06F); SUCTION CLEANERS IN GENERAL (cleaning in general B08) - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract The multi-cyclone dust separating apparatus includes a first cyclone unit including a first outer tub with a first air inlet and a cylindrical element with a first air outlet, and whirling air from the first air inlet to separate dust therefrom, the cylindrical element being disposed in the first outer tub to form a first cyclone chamber, along with the first outer tub; a second cyclone unit including a plurality of cyclones, each having a second air inlet for drawing in dust-laden air from the first cyclone chamber, to provide a second dust separation; and a dust bin including a first dust collecting chamber for collecting the dust separated by the first cyclone unit and a plurality of second dust collecting chambers for collecting the dust separated by the second cyclone unit. ## Claims ### Claim 1 A multi-cyclone dust separating apparatus, comprising: a first cyclone unit including a first outer tub with a first air inlet and a cylindrical element with a first air outlet, and whirling air from the first air inlet to separate dust from the air to effect a first separation of dust from air, the cylindrical element being disposed in the first outer tub to form a first cyclone chamber, which is a space for whirling the air, along with the first outer tub; a second cyclone unit including a plurality of cyclones, each of which have a second air inlet for drawing in the air from which the dust is separated in the first cyclone chamber, to effect a second separation of dust from the air; and a dust bin including a first dust collecting chamber for collecting the dust separated by the first cyclone unit and a plurality of second dust collecting chambers for collecting the dust separated by the second cyclone unit, wherein the second cyclone unit is disposed completely within the cylindrical element of the first cyclone unit and the plurality of second dust collecting chambers of the dust bin is separately formed and connected with the corresponding cyclones of the second cyclone unit, respectively. ### Claim 2 (depends on 1) The multi-cyclone dust separating apparatus of claim 1, wherein the first cyclone unit and the second cyclone unit are substantially concentric. ### Claim 3 (depends on 1) The multi-cyclone dust separating apparatus of claim 1, wherein the first air outlet of the cylindrical element of the first cyclone unit is disposed to face the second air inlets of the plurality of cyclones. ### Claim 4 (depends on 3) The multi-cyclone dust separating apparatus of claim 3, wherein the first cyclone unit further comprises a grill member disposed in the first air outlet of the cylindrical element thereof to restrain the air from which the dust is separated in the first cyclone chamber from directly being drawn into the second air inlets of the plurality of cyclones. ### Claim 5 (depends on 1) The multi-cyclone dust separating apparatus of claim 1, wherein the first cyclone unit further comprises a grill member disposed in the first air outlet of the cylindrical element thereof to restrain the air from which the dust is separated in the first cyclone chamber from directly being drawn into the second air inlets of the plurality of cyclones. ### Claim 6 (depends on 1) The multi-cyclone dust separating apparatus of claim 1, wherein the first cyclone unit further comprises a skirt member disposed just below the first air outlet of the cylindrical element thereof. ### Claim 7 (depends on 6) The multi-cyclone dust separating apparatus of claim 6, wherein the skirt member is of an elastic material. ### Claim 8 (depends on 1) The multi-cyclone dust separating apparatus of claim 1, wherein the second cyclone unit further comprises an air stagnating space formed above the plurality of cyclones, so that the air discharged from the plurality of cyclone is mixed up. ### Claim 9 (depends on 6) The multi-cyclone dust separating apparatus of claim 6, wherein the dust bin further comprises: a second outer tub to form the first dust collecting chamber; and a plurality of cylinder members disposed in the second outer tub to form the plurality of second dust collecting chambers, respectively. ### Claim 10 (depends on 9) The multi-cyclone dust separating apparatus of claim 9, wherein the second outer tub is formed so that at least a portion of a top end thereof is located at the same height as or below the skirt member. ### Claim 11 (depends on 9) The multi-cyclone dust separating apparatus of claim 9, wherein the plurality of cylinder members comprises more than two cylinder members, each of which is detachably coupled with a lower part of at least one of the plurality of cyclones.