U.S. patent number 3,671,996 [Application Number 05/086,139] was granted by the patent office on 1972-06-27 for rotary brush adjustment device for vacuum cleaner attachment.
Invention is credited to Paul Emile Gaudry.
United States Patent |
3,671,996 |
Gaudry |
June 27, 1972 |
ROTARY BRUSH ADJUSTMENT DEVICE FOR VACUUM CLEANER ATTACHMENT
Abstract
A device for adjusting the level of a rotary brush mounted
inside the housing of a vacuum cleaner attachment including a
driving member mounted for rotation in the housing at one end of
the brush and a driven member also mounted for rotation in the
housing at the other end of the brush. A stationary shaft is
eccentrically connected at each end thereof to the driving and
driven members for transmitting the rotary movement imparted by the
driving member to the driven member so as to simultaneously vary
the level of both ends of the stationary shaft. The brush is
mounted for rotation of the stationary shaft and the level thereof
is adjusted by the movement of the stationary shaft.
Inventors: |
Gaudry; Paul Emile (Laval des
Rapides, Quebec, CA) |
Family
ID: |
22196525 |
Appl.
No.: |
05/086,139 |
Filed: |
November 2, 1970 |
Current U.S.
Class: |
15/368;
15/392 |
Current CPC
Class: |
A47L
9/0494 (20130101) |
Current International
Class: |
A47L
9/04 (20060101); A47l 009/04 () |
Field of
Search: |
;15/368,370,371,372,373,354,355,356,361,362,392,389 ;29/116 ;64/4,5
;308/210 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Machlin; Leon G.
Claims
What is claimed is:
1. A device for adjusting the level of a rotary brush mounted
inside the housing of a vacuum cleaner attachment comprising:
a. A driving member mounted for rotation on said housing at one end
of said member;
b. A driven member mounted for rotation on said housing at the
other end of said brush;
c. A shaft eccentrically connected at each end thereof in fixed
relation to both driving and driven members for transmitting rotary
movement imparted by said driving member to said driven member so
as to simultaneously vary the level of both ends of said shaft;
d. means for mounting said brush for rotation on said shaft;
and
e. manually operable means for rotating said driving member.
2. A device as defined in claim 1, wherein said driving member
includes a control lever for rotating said driving member a
predetermined number of degrees.
3. A device as defined in claim 1, including means for indexing at
least one of said members so as to provide a number of pre-set
levels for said rotary brush.
4. A device as defined in claim 3, wherein said indexing means
comprise a plurality of indexing cams located on at least one of
said members and spring loaded means located on said housing and
cooperating with said cams.
5. A device as defined in claim 4, wherein said spring loaded means
comprise a spring located in a hole in said housing and a steel
ball biased by said spring against said indexing cam.
6. A device as defined in claim 4, wherein said members are plates
and wherein said housing includes slots having dimensions slightly
greater than said plates for receiving said plates, and further
comprising pins passing through said housing and said plates for
rotatably mounting said plates within said slots.
7. A device as defined in claim 6, wherein said plates include stop
means adapted to contact the edge of said slots for limiting the
amount of rotation of said plates.
8. A device as defined in claim 1, wherein each of said members has
an elongated slot therein and wherein said shaft has a flattened
portion protruding through said elongated slot for coupling said
shaft to said members.
Description
This invention relates to a rotary brush adjustment device for use
with a vacuum cleaner attachment.
Motor-operated brush attachments have been provided lately for use
with vacuum cleaners in order to provide better cleaning of rugs.
Such a rotary brush is normally mounted for rotation within the
housing of the vacuum cleaner attachment and, when it is worn out
after a certain amount of use, it is replaced by a new one. Such an
arrangement is not too convenient because the height of the brush
above the floor level is fixed and pre-set to suit a rug of average
thickness. In addition, the brushes are never used to their full
capacity and must be thrown out even if the bristles thereof are
still long enough to be put to useful use.
It is therefore the object of the invention to provide an
adjustment of the level of such a rotary brush so as to extend the
life thereof and also to suit rugs of various thickness.
Means for varying the height of household appliances above the
floor have been provided in the prior art. However, such means are
usually coupled with the rollers of the appliances and, therefore,
require separate control devices for each roller. Such an
adjustment is cumbersome and, in addition, would not provide an
even adjustment of the rotary brush.
It is therefore the main object of the invention to provide an easy
adjustment of the level of the rotary brush of a vacuum cleaner
attachment which avoids the necessity of adjusting the level of
each end of the rotary brush individually.
The device, in accordance with the invention, comprises a driving
member mounted for rotation on the housing of the vacuum cleaner
attachment at one end of the brush, and a driven member also
mounted for rotation on the housing of the vacuum cleaner
attachment at the other end of the brush. A stationary shaft is
eccentrically connected at each end thereof to the driving and
driven members for transmitting the rotary movement imparted by the
driving member to to the driven member so as to simultaneous vary
the level of both ends of the stationary shaft. The brush is
mounted for rotation on a stationary shaft and the level thereof is
controlled by the movement of the stationary shaft.
In a preferred embodiment of the invention, the driving member is a
control lever which may be manually rotated a predetermined number
of degrees. Such lever is in the shape of a plate having a number
of indexing cams therein permitting to set the rotary brush at
predetermined levels above the surface of the floor. The cams
cooperate with spring loaded means located on the housing of the
vacuum cleaner attachment. Similarly, the driven member is a plate
which may also have indexing cams corresponding to the ones of the
driving member.
The invention will now be disclosed with reference to a preferred
embodiment thereof and to the accompanying drawings in which:
FIG. 1 illustrates a vacuum cleaner attachment including a rotary
brush and an adjustment device for such rotary brush;
FIG. 2 illustrates an exploded view of the various parts of the
adjustment device; and
FIG. 3 illustrates the operation of the driving member of the
adjustment device.
Referring to the drawings, there is shown a rotary brush attachment
10 for a vacuum cleaner comprising a brush 12 rotated by a motor
(not shown) through a belt 14. The height of the brush above the
floor is controlled by means of the level adjustment device in
accordance with the invention and comprising generally a driving
member 16 and a driven member 18 which are rotatably mounted on the
housing of the attachment 10 about an axis of rotation 20, and a
rod 22 which is eccentrically connected to members 16 and 18 at a
predetermined distance from axis of rotation 20. The rotation of
the driving member 16 in the directions indicated by arrows 24 and
25 will impart a corresponding rotary movement to driven member 18
through rod 22 so as to simultaneously raise or lower both ends of
rod 22.
Brush 12 is rotatably mounted on rod 22 by means of needle bearing
mount 26 which is secured to brush 12 and needle bearing 28 which
is disposed on rod 22. The raising or lowering of rod 22 will
consequently raise or lower brush 12.
In the embodiment disclosed, the driving member 16 and the driven
member 18 take the form of end plates which are rotatably mounted
in slots 30 provided in the housing of the vacuum cleaner
attachment 10, the dimensions of such slots being slightly greater
then plates 16 and 18. End plates 16 and 18 are arranged to pivot
in the slots 30 about pins 32 inserted in holes 33 and 34 in the
plates and the housing.
End plate 16 is provided with a control lever 35 for rotating the
plate a predetermined number of degrees. In addition, indexing
means are provided in at least one of the plates 16 and 18 for
determining a number of pre-set levels for the rotary brush. Such
indexing means comprise a number of indexing cams 36 in the form of
accurate cuts which cooperate with a spring loaded means located on
the housing of the attachment 10. Such spring loaded means
includes, in the embodiment disclosed, a spring 38 inserted in a
hole 40 in the housing and a steel ball 42 adapted to contact cams
36.
End plates 16 and 18 further comprise stop means 44 which are
adapted to contact the edge of slots 30 for limiting the amount of
rotation of the plates.
Rod 22 is provided with a flattened portion 46 at both ends thereof
which cooperate with slots 48 in end plates 16 and 18. Such a
connection is advantageous in that it permits to easily couple
driving plate 16 to driven plate 18. In addition, brush 12 may be
easily dismantled by removing one of the end plates and withdrawing
the brush.
In operation, the height of brush 12 above ground is selected by
operating lever 35 which will permit to position the end plate 16
in one of its pre-set positions. The rotation of driving plate 16
will rotate driven plate 18 which is coupled thereto by means of
rod 22 so as to simultaneously control both ends of the brush 12
mounted on rod 22. Consequently, there will be no need for
adjusting both ends of the brush separately.
It is to be understood that the driving and driven members
disclosed in the preferred embodiment of the invention may take
various forms. Consequently, the invention is not to be limited to
the structure of the embodiment disclosed but to the invention as
stated in the statement of invention and in the claims
attached.
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