Gas separation – Plural serial basically diverse separating media – Plural stages in unitary casing
Reexamination Certificate
2002-02-12
2003-11-18
Hopkins, Robert A. (Department: 1724)
Gas separation
Plural serial basically diverse separating media
Plural stages in unitary casing
C055S426000, C055S459100, C055SDIG003
Reexamination Certificate
active
06648934
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to a cyclone dust collecting apparatus for a vacuum cleaner, and more particularly to a grill assembly of a cyclone dust collecting apparatus for a vacuum cleaner to be used for preventing dust from flowing into a vacuum-generating device.
2. Description of the Related Art
FIG. 1
shows in cross-section, a conventional cyclone dust collecting apparatus for a vacuum cleaner. According to
FIG. 1
, the conventional cyclone dust collecting apparatus
10
for the vacuum cleaner comprises a cyclone body
20
and a dirt-collecting portion
30
.
At an upper part of the cyclone body
20
is provided an air suction passage
21
connected with a brush assembly (not shown) of the vacuum cleaner. Air drawn through the air suction passage
21
flows in a direction tangential to the inside surface of the cyclone body
20
and forms a whirling air current, as shown by the arrows.
At an upper central part of the cyclone body
20
is provided an air discharge passage
22
, connected with a vacuum-generating device (not shown) of the vacuum cleaner. In order to prevent dirt from flowing into the vacuum-generating device, a grill
23
is provided at an inlet of the air discharge passage
22
.
The grill
23
has a plurality of passages
24
formed thereon. When the vacuum-generating device of the vacuum cleaner operates, the air, which may contain many kinds of dirt existing on a cleaning surface, is drawn into the cyclone body
20
through the brush assembly (not shown) and the air suction passage
21
.
The air drawn into the cyclone body
20
forms the whirling air current, and the dirt entrained in the air is separated by centrifugal force and collected in the dirt-collecting portion
30
. Then, the air flows into the vacuum-generating device through the passages
24
of the grill
23
and the air discharge passage
22
.
Meanwhile, some dirt that is not separated from the air passes through the grill
23
via the passages
24
of the grill
23
, and flows into the vacuum-generating device through the air discharge passage
22
, thereby deteriorating dust-collecting function of the vacuum cleaner.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a grill assembly of a cyclone dust collecting apparatus for a vacuum cleaner capable of improving dust collecting of the vacuum cleaner by preventing dirt from flowing into the vacuum-generating device after passing through a grill.
Another object of the present invention is to provide a grill assembly of a cyclone dust collecting apparatus for a vacuum cleaner allowing a grill to be easily cleaned by providing a mounting and removing capability to the grill.
The above objects are accomplished by providing a grill assembly for a cyclone dust collecting apparatus for use in a vacuum cleaner the grill assembly being disposed at an upper part of an air discharge passage of a cyclone body for separating dirt from a whirling air current by centrifugal force by forming the whirling air current from a drawn air, for preventing dirt from flowing into a vacuum-generating device of the vacuum cleaner. The grill assembly comprises a grill body having a plurality of passages formed thereon and having a cylindrical shape having openings at both ends thereof, a sealing member for sealing one opening of the grill body, and mounting means comprising a locking knob integrally formed with an upper part of the sealing member and a penetrating hole disposed at a corresponding portion of the grill body, for allowing the locking knob to pass there through in a predetermined position, the mounting means for easily mounting the sealing member on and removing it from the grill body.
REFERENCES:
patent: 2071975 (1937-02-01), Holm-Hansen et al.
patent: 4397071 (1983-08-01), Liller
patent: 5096475 (1992-03-01), Kasper et al.
patent: 6195835 (2001-03-01), Song et al.
patent: 6269518 (2001-08-01), Yung
patent: 1136028 (2001-09-01), None
patent: 2181370 (1987-04-01), None
patent: 2344278 (2000-06-01), None
patent: 2376197 (2002-12-01), None
US Published patent application No. 2002/0178698, Oh et al.
US Published patent application No. 2003/0014953 Oh.
US Published patent application No. 2002/0069476 Yung.
US Published patent application No. 2002/0194695 Stephens et al.
“Bauelemente Der Feinmechanik”, von. Richter et al., Verlag Technik, Berlin, 1957 pp. 160-163.
U.S. Published Application No. U.S. 2001/0025395, Oct. 4, 2001, first page only.
Choi Min-jo
Lee Byung-jo
Hopkins Robert A.
Samsung Gwangju Electronics Co. Ltd.
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