Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate
1999-12-29
2003-12-30
Till, Terrence R. (Department: 1744)
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
C015S412000
Reexamination Certificate
active
06668421
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a motor brush dust removing filter for use in a vacuum cleaner, and more particularly, to a motor brush dust filter for a vacuum cleaner in which brush dust from a brush assembly of an electric motor employed to generate suction power of the vacuum cleaner is prevented from being discharged.
2. Description of the Conventional Art
A typical vacuum cleaner, as shown in
FIG. 1
, includes a cylindrical canister
10
, a supporting member
11
having wheels
11
a
at a lower portion of cylindrical canister
10
, an air outlet
12
a
for discharging air at an upper portion of cylindrical canister
10
, and a vacuum generating unit
13
for sucking air into cylindrical canister
10
.
Vacuum generating unit
13
is made up of a vacuum chamber
13
a
, a filter
13
b
, an air suction fan
13
c
arranged on suction filter
13
b
, and a motor
14
for driving air suction fan
13
c.
When an electric motor
14
is driven by power supplied thereto by a user, air suction fan
13
c
rotates so as to generate in a space of suction filter
13
b
, i.e., vacuum chamber
13
a
, a vacuum state. Then, debris is sucked in via a hose
13
d
by the suction force of vacuum chamber
13
a.
Thus, sucked-in substances are filtered by filter
13
b
, and the air passed through filter
13
b
is discharged outside via air outlet
12
a.
Electric motor
14
employed for a rotation of air suction fan
13
c
is a common electric motor which uses a brush assembly
14
a
to provide a rotator with power. It is a common practice to place brush assembly
14
a
onto electric motor
14
, wherein brush assembly
14
a
has at top surface thereof an air vent
14
b
so that a heat generated from the friction of the brush may be cooled down and a brush dust may be discharged.
To prevent the brush dust generated by the operation of brush assembly
14
a
of motor
14
from being discharged out via air outlet
12
a
, a conventional solution places a cover
15
having a non-woven fabric or a sponge
15
a
attached thereto over air vent
14
b
, so that the brush dust can be roughly collected and caught by a non-woven fabric or a sponge
2
c
which is attached inside air outlet
12
a.
However, such a conventional brush dust collecting unit has disadvantages in that brush dust may not be completely blocked since cover
15
cannot be placed closely to air vent
14
b
considering cooling of inner heat generated by the operation of electric motor
4
.
SUMMARY OF THE INVENTION
Therefore, it is an object of the present invention to provide a motor brush dust removing filter for use in a vacuum cleaner in which the brush dust from a brush assembly of an electric motor may be discharged via an additional outlet and a filter is embedded in or attached to the outlet, to thereby allow an efficient cooling of the brush assembly and a complete blocking of the brush dust.
To accomplish the above object of the present invention, there is provided a motor brush dust removing filter for use in a vacuum cleaner, the vacuum cleaner including a cylindrical canister, a support member having wheels installed under the canister, an air outlet in a cover for discharging air from an upper portion of the canister, and a vacuum generating unit containing an electric motor for sucking air into the canister, wherein the cover has at a center thereof a circular aperture, a circular protrusion along the aperture, a filtering member, and a brush dust removing filter having a connection portion attached to a case of the motor brush assembly, so that brush dust discharged via an air vent formed at an upper surface of the brush assembly case is filtered by the filter of the filter unit and directly exhausted to the atmosphere.
REFERENCES:
patent: 5027469 (1991-07-01), Toyoshima et al.
Coleman Henry
Conet Industry Inc.
Sapone William
Sudol R. Neil
Till Terrence R.
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