Multi cyclone dust collector for a vacuum cleaner

Gas separation: processes – Deflecting – Centrifugal force

Reexamination Certificate

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Details

C055S343000, C055S348000, C055S424000, C055S429000, C055SDIG030, C015S350000, C015S353000

Reexamination Certificate

active

07547351

ABSTRACT:
A multi-cyclone dust collector including at least one first cyclone forcing contaminants-laden air that is entered into a lower portion of the at least one first cyclone to whirl so as to centrifugally separate contaminants from the contaminants-laden air; and at least one second cyclone being disposed around the at least one first cyclone, the at least one second cyclone forcing semi-clean air that is discharged from the at least one first cyclone and is entered into a lower portion of the at least one second cyclone to whirl so as to centrifugally separate fine contaminants from the air.

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patent: 2002/0116907 (2002-08-01), Gammack et al.
patent: 2005/0050863 (2005-03-01), Oh
patent: 2007/0079584 (2007-04-01), Kim et al.
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patent: 08-322768 (1996-12-01), None
patent: WO 01/95780 (2001-12-01), None
Office Action dated Oct. 17, 2008 corresponding to Chinese Patent Application No. 200610092253.1.
Search Report dated Nov. 8, 2007 corresponding to European Patent Application No. 06291062.5.
Office Action dated Jul. 3, 2007 from corresponding Russian patent Application No. 2006120286.

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