Gas separation – Plural serial basically diverse separating media – Plural stages in unitary casing
Reexamination Certificate
2005-09-23
2009-02-10
Hopkins, Robert A (Department: 1797)
Gas separation
Plural serial basically diverse separating media
Plural stages in unitary casing
C055S343000, C055S349000, C055S429000, C055SDIG030
Reexamination Certificate
active
07488362
ABSTRACT:
A dust collection assembly of a vacuum cleaner is provided. The dust collection assembly includes a dust collecting box, a filter, a flow guide unit, an exhaust guider, and an upper cover. The dust collecting box and the flow guide unit are integrally formed in a single body. The dust collecting box includes a first and second dust collecting spaces for collecting foreign objects. The filter is disposed in the inside of the dust collecting space to primarily filter foreign objects during operation of a cyclone. The flow guide unit guides airflow and has small cyclones integrally formed therein, for secondarily filtering the foreign objects in air. The exhaust guider guides airflow and has a plurality of discharge holes through which air filtered by the small cyclone flows. The upper cover is disposed on the upper side of the exhaust guider.
REFERENCES:
patent: 3425192 (1969-02-01), Davis
patent: 5779745 (1998-07-01), Kilström
patent: 7273506 (2007-09-01), Oh et al.
patent: 2005/0050678 (2005-03-01), Oh et al.
patent: 201 09 699 (2001-10-01), None
patent: 20109699 (2001-11-01), None
patent: WO 00/74548 (2000-12-01), None
Hwang Jung Bae
Hwang Man Tae
Jeong Hoi Kil
Kim Young Ho
Park Min
Hopkins Robert A
LG Electronics Inc.
McKenna Long & Aldridge LLP
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