Gas separation – Plural serial basically diverse separating media – Plural stages in unitary casing
Reexamination Certificate
2007-11-06
2007-11-06
Hopkins, Robert A. (Department: 1724)
Gas separation
Plural serial basically diverse separating media
Plural stages in unitary casing
C055S410000, C055S418000, C055S429000, C055S433000, C055S459100, C055S482000, C055SDIG030
Reexamination Certificate
active
10991057
ABSTRACT:
A dust collecting apparatus for use in a vacuum cleaner provides improved suction cleaning efficiency. The dust collecting apparatus includes a main body comprising a suction port through which a dust-laden air is drawn, and a first and a second discharge ports through which filtered air is discharged. A filter unit disposed between the suction port and the first discharge port, filters out dusts from the air. A parallel cyclone unit, disposed between the suction port and the second discharge port, removes dusts from the air by centrifugal force. The first discharge port is larger in sectional area than the second discharge port, and therefore, the filter unit has higher dust removal rate than the cyclone unit in the initial stage of the operation. Accordingly, the dust collecting apparatus can provide greater initial suction cleaning efficiency than a dust collecting apparatus having only the cyclone unit.
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Search Report from Spanish Patent Office, Feb. 20, 2007.
Choi Keon-soo
Lim Jong-kook
Hopkins Robert A.
Ladas & Parry LLP
Samsung Gwangju Electronics Co. Ltd.
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