Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate
2001-04-12
2002-10-15
Snider, Theresa T. (Department: 1744)
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
C015S364000, C015S377000, C310S015000, C310S266000
Reexamination Certificate
active
06463623
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a power brush assembly for vacuum cleaners and, more particularly, to a power brush assembly designed to perform a linear reciprocating action in addition to a rotating action, thus improving a dust cleaning effect of a vacuum cleaner.
2. Description of the Prior Art
FIG. 1
is a perspective view of a conventional vacuum cleaner. As shown in the drawing, the conventional vacuum cleaner comprises a suction part
200
, which is provided at the lower portion of a body
100
and is used for sucking dust-laden air from a target surface using a suction force of a motor-operated suction fan
300
. A dust filter bag
400
is set within the body
100
at a predetermined position, and filters the dust-laden air to collect dust therein. An air guide passage
500
is provided at the body
100
for guiding the dust-laden air from the suction part
200
to the dust filter bag
400
within the body
100
. A power brush assembly
600
is set within the suction nozzle of the suction part
200
, and actively brushes the target surface to more effectively suck dust and impurities from the target surface into the suction part
200
.
FIG. 2
is a view, showing the construction of a conventional power brush assembly for vacuum cleaners.
As shown in
FIG. 2
, the conventional power brush assembly comprises a casing
104
defining the suction nozzle
102
, through which dust-laden air is sucked under pressure into the suction part of a vacuum cleaner. A power brush
106
is rotatably set within the casing
104
, and brushes dust and impurities on a target surface so as to allow the dust and impurities to be more effectively sucked along with pressurized air from the target surface into the suction part. A drive motor
108
is set on the interior surface of the casing
104
, and generates a rotating force for the power brush
106
. The power brush assembly also comprises a power transmission mechanism used for transmitting the rotating force of the drive motor
108
to the power brush
106
.
In the above conventional power brush assembly, the power brush
106
has a longitudinal roller-shaped body, with a plurality of spiral ridges regularly formed around the external surface of the roller-shaped body. A great number of brushing projections
112
are formed along each spiral ridge of the power brush
106
, and actively brush a target surface to separate dust and impurities from the surface during a rotating action of the brush
106
. Two rotating shafts
110
are formed at opposite ends of the roller-shaped body of the power brush
106
, and rotatably hold the brush
106
to opposite sidewalls of the casing
104
, with a sleeve bearing
114
formed on the interior surface of each sidewall of the casing
104
at a position around each rotating shaft
110
and rotatably holding each shaft
110
on the casing
104
.
The power transmission mechanism of the conventional power brush assembly comprises a drive pulley
118
, which is fixed to the motor shaft
116
of the drive motor
108
and is rotatable along with the motor shaft
116
in the same direction. A driven pulley
120
is mounted to one end of the power brush
106
, while a transmission belt
124
is wrapped around the drive and driven pulleys
118
and
120
to transmit the rotating force of the drive pulley
118
to the driven pulley
120
.
When the drive motor
108
of the conventional power brush assembly is electrically activated, the drive motor
108
is rotated in one direction. The rotating force of the motor
108
is transmitted to the power brush
106
through the drive pulley
118
, the belt
124
and the driven pulley
120
, thus rotating the brush
106
in the same direction and allowing the brush
106
to actively brush a target surface to separate dust and impurities from the target surface.
However, the conventional power brush assembly is problematic in that it only performs a rotating action around its rotating shafts
110
, and so the brush assembly cannot totally brush a target surface at areas corresponding to the gaps between the opposite ends of the brush
106
and the sidewalls of the casing
104
. Therefore, it is almost impossible for the conventional brush assembly to separate dust or impurities from said areas, thus reducing the dust cleaning effect of a vacuum cleaner.
SUMMARY OF THE INVENTION
Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a power brush assembly for vacuum cleaners, which is designed to perform a linear reciprocating action in addition to a rotating action, thus effectively brushing the areas of a target surface corresponding to the gaps between opposite ends of its brush and the sidewalls of the casing and improving the dust cleaning effect of a vacuum cleaner.
In order to accomplish the above object, the present invention provides a power brush assembly for vacuum cleaners, comprising: a casing set in the suction part of a vacuum cleaner and defining a suction nozzle used for sucking dustladen air under pressure into the suction part of the vacuum cleaner; a power brush set within the casing such that the brush is rotatable and reciprocable to the left and right within the casing, the power brush being used for brushing dust and impurities on a target surface; a drive motor generating a rotating force for allowing the power brush to rotate and reciprocate to the left and right; and a power transmission mechanism connecting the drive motor to the power brush and transmitting the rotating force of the drive motor to the power brush.
REFERENCES:
patent: 1056129 (1913-03-01), Sladinska
patent: 1940954 (1933-12-01), Kohler
patent: 2253289 (1941-08-01), Demaree et al.
patent: 2253309 (1941-08-01), Smellie
patent: 2421235 (1947-05-01), Basinger
patent: 4050112 (1977-09-01), Saxon
patent: 4945269 (1990-07-01), Kamm
patent: 5789837 (1998-08-01), Shin et al.
patent: 5901411 (1999-05-01), Hato et al.
patent: 6215206 (2001-04-01), Chitayat
patent: 6255749 (2001-07-01), Aoshima et al.
Ahn Jun Ho
Park Jin Soo
Birch & Stewart Kolasch & Birch, LLP
LG Electronics Inc.
Snider Theresa T.
LandOfFree
Power brush assembly for vacuum cleaners does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Power brush assembly for vacuum cleaners, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power brush assembly for vacuum cleaners will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2965076