Dust collection unit for vacuum cleaner

Details Dust collection unit for vacuum cleaner Dust collection unit for vacuum cleaner

2005-09-23

2008-10-28

Griffin, Walter D. (Department: 1797)

Gas separation

Plural serial basically diverse separating media

Plural stages in unitary casing

C055S343000

Reexamination Certificate

active

07442219

ABSTRACT:
A dust collection unit for a vacuum cleaner includes a first cylindrical filtering chamber for filtering foreign objects contained in air using a cyclone airflow, a plurality of second filtering chamber formed along an outer circumference of the first cylindrical filtering chamber to receive the air passed through the first cylindrical filtering chamber, a first storing chamber formed under the first filtering chamber to store the foreign objects filtered in the first filtering chamber, a second storing chamber for storing the foreign objects filtered in the second filtering chambers, and a connection plate interconnecting opposite ends of the second storing chamber to define the first filtering chamber, the connection plate having a lower end located to be higher than a lower end of the second storing chamber.

REFERENCES:
patent: 6461508 (2002-10-01), Thomson
patent: 2004/0088956 (2004-05-01), Gammack
patent: 2006/0123590 (2006-06-01), Fester et al.
patent: 1219223 (2002-07-01), None
U.S. Appl. No. 60/593,125, Fester et al. Dec. 13, 2004.

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