Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate
2005-06-07
2005-06-07
Till, Terrence R. (Department: 1744)
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
C015S327100, C015S327700
Reexamination Certificate
active
06901625
ABSTRACT:
The present invention relates to a dust collection unit for use in a vacuum cleaner. According to the present invention, there is provided a dust collection unit for use in a vacuum cleaner which comprises a cylindrical casing in which air introduced through an inlet port is formed into spiral flow and of which an upper end is open; a cover for opening and closing the upper end of the casing; a filter which is installed on a bottom surface of the cover and formed in the shape of a cylinder having a predetermined length and by which fine foreign substances can be filtered out when the air is introduced from the exterior thereof, and through which the air is discharged downwardly; and an exhaust duct which comes into close contact with a bottom surface of the filter and including an exhaust port on a side surface of the casing to discharge the air from the filter to the exterior of the casing. It is preferred that the exhaust port of the casing be formed at a lower portion of the side surface of the casing.
REFERENCES:
patent: 4172710 (1979-10-01), van der Molen
patent: 6228260 (2001-05-01), Conrad et al.
patent: 6406505 (2002-06-01), Oh et al.
patent: 6578230 (2003-06-01), Park et al.
patent: 6599350 (2003-07-01), Rockwell et al.
patent: 6647587 (2003-11-01), Ohara et al.
patent: 2002/0032947 (2002-03-01), Oh et al.
Yang Byung-Sun
Yoo Myung-Sig
Fleshner & Kim LLP
LG Electronics Inc.
Till Terrence R.
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