Gas separation – Plural serial basically diverse separating media – Plural stages in unitary casing
Reexamination Certificate
2002-02-25
2003-07-29
Hopkins, Robert (Department: 1724)
Gas separation
Plural serial basically diverse separating media
Plural stages in unitary casing
C055S413000, C055S426000, C055S459100, C055SDIG003
Reexamination Certificate
active
06599338
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates 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 capable of preventing backflow of the filth like hair to a vacuum-generating device.
2. Description of the Related Art
FIG. 1
shows one example of a conventional cyclone dust collecting apparatus for a vacuum cleaner. According to
FIG. 1
, the conventional cyclone dust collecting apparatus
10
for a vacuum cleaner comprises a cyclone body
20
, a filth-collecting portion
30
, and a partition
40
.
An air suction passage
21
, connected with a brush assembly (not shown) of the vacuum cleaner, is disposed at an upper part of the cyclone body
20
. The air, which is drawn through the air suction passage
21
forms a whirling air current as it is drawn to the tangential direction of the cyclone body
20
.
An air discharging passage
22
, connected with a vacuum-generating device (not shown) of the vacuum cleaner, is disposed at an upper center of the cyclone body
20
. A grill
23
is disposed at an inlet of the air discharging passage
22
for preventing hair being drawn to the vacuum-generating device.
The conventional cyclone dust collecting apparatus
10
of a vacuum cleaner with the above construction draws the filth-laden air from the cleaning surface to the cyclone body
20
through the air suction passage
21
and the brush assembly when the vacuum-generating device is operated. The air drawn into the cyclone body
20
forms a whirling air current with the filth contained in the air collected in a filth collecting portion
30
by being separated by a centrifugal force of the whirling air current. The cleaned air flows to the vacuum generating device through the passage
24
of the grill
23
and the air discharging passage
22
.
However, as shown, for the conventional cyclone dust collecting apparatus
10
, the inlet of the air discharging passage
22
, which transfers a suction force of the vacuum-generating device to the cyclone body
20
, is formed very closely to the outlet of the air suction passage
21
. Accordingly, a phenomenon occurs that some of the filth that is drawn into through the air suction passage
21
, cannot form a whirling air current due to the suction force of the vacuum generating device at the inlet of the air discharging passage
22
. Instead, the filth is directly discharged through the grill
23
and the air discharging passage
22
without forming whirling air current.
This phenomenon is aggravated at the upper part of the grill
23
that is affected by the pressure at the inlet of the air discharging passage
22
and close to the outlet of the air suction passage
21
. Therefore, the dust collecting efficiency of the vacuum cleaner is decreased. Accordingly, there is a need for improvements in these type devices.
SUMMARY OF THE INVENTION
The present invention has been made to overcome the above-mentioned problems of the related art. Accordingly, the present invention now provides a grill assembly of a dust collecting apparatus for a vacuum cleaner capable of improving dust collecting efficiency of the vacuum cleaner. In this device, filth, which is drawn through an air suction passage of a cyclone body with the air, is prevented from discharging through a grill and an air discharging passage without forming a whirling air current.
This is accomplished by providing a grill assembly of a cyclone dust collecting apparatus for a vacuum cleaner, disposed at an upper part of an air discharging passage of a cyclone body that generates whirling air current from the air drawn thereinto. The grill assembly separates filth from the whirling air by a centrifugal force and prevents the filth from drawing into the vacuum generating device of the vacuum cleaner. This grill assembly advantageously comprises a grill body including a plurality of passages and an extension pipe having a diameter formed as the same with a diameter of the air discharging passage. The extension pipe is preferably disposed between an upper part and a lower part of the passage.
A filter can be formed in the extension pipe and, if so, can be disposed at the extension pipe for an upper part of the filter being protruded from the upper part of the extension part.
REFERENCES:
patent: 2344778 (1998-12-01), None
patent: 52046581 (1977-04-01), None
patent: 0004816 (2000-02-01), None
patent: 0108544 (2001-02-01), None
Jung Joo-suck
Oh Jang-keun
Hopkins Robert
Ladas & Parry
Samsung Gwangju Electronics Co. Ltd.
LandOfFree
Grill assembly of a cyclone dust collecting apparatus for a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Grill assembly of a cyclone dust collecting apparatus for a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Grill assembly of a cyclone dust collecting apparatus for a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3062686