U.S. patent number 3,927,434 [Application Number 05/360,048] was granted by the patent office on 1975-12-23 for water powdered rotary brush.
Invention is credited to Fred M. Burgess.
United States Patent |
3,927,434 |
Burgess |
December 23, 1975 |
Water powdered rotary brush
Abstract
Water powered rotary brush means adapted for toothbrushes, bath
brushes, and the like, containing a fluid motor therein that is
driven by water available from a pressurized local source such as a
basin, shower, or bathtub. According to the invention, a pair of
parallel rotary brushes are synchronously driven by the fluid motor
in opposite directions of rotation, and only one side of the brush
pair is exposed so that the operative portions of the brushes move
toward each other. In a toothbrush form of the invention the
brushes are arranged as laterally intermeshed, overlapping helixes
for concentration of the brushing effect, and the brushes are
contained in a separate head unit releasably connected to a handle
unit which contains the fluid motor, for sanitary utilization by a
plurality of persons of separate head units in connection with a
single handle unit. In a bath brush form, the oppositely driven
brushes are spaced apart to avoid catching hair therebetween, the
bath brush including a spray head outlet of exhaust water from the
fluid motor, providing a spray flow rate generally in proportion to
the rate of rotation of the brushes.
Inventors: |
Burgess; Fred M. (San Fernando,
CA) |
Family
ID: |
23416381 |
Appl.
No.: |
05/360,048 |
Filed: |
May 14, 1973 |
Current U.S.
Class: |
15/24;
415/904 |
Current CPC
Class: |
A61C
17/30 (20130101); A46B 13/06 (20130101); Y10S
415/904 (20130101); A46B 2200/1066 (20130101) |
Current International
Class: |
A46B
13/00 (20060101); A46B 13/06 (20060101); A61C
17/30 (20060101); A61C 17/16 (20060101); A46B
013/06 () |
Field of
Search: |
;15/23,24 ;310/50
;418/266 ;415/503 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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|
|
|
|
|
|
262,496 |
|
Jun 1964 |
|
AU |
|
1,236,471 |
|
Jun 1960 |
|
FR |
|
460,319 |
|
Nov 1950 |
|
IT |
|
Primary Examiner: Roberts; Edward L.
Attorney, Agent or Firm: Gabriel; Albert L.
Claims
I claim:
1. A water powered rotary brush which comprises housing means; a
pair of generally cylindrical brushes rotatably mounted in said
housing means in a generally parallel array with one side of the
brush pair exposed outside of said housing means and the other side
of the brush pair recessed in said housing means; drive means in
said housing means, said drive means including a fluid motor having
fluid inlet and outlet conduit means, and drive connection means
from said fluid motor to said brushes arranged to drive said
brushes in opposite directions of rotation so that the exposed
portions of said brushes move toward each other; and drive control
means associated with said drive means for selectively actuating
said drive means between on and off drive conditions, said drive
control means comprising clutch means in said drive connection.
2. A water powered rotary brush as defined in claim 1 wherein said
fluid motor is a positive displacement motor.
3. A water powered rotary brush as defined in claim 2, wherein said
positive displacement motor has a pair of axially aligned rotors
rotationally offset approximately 90.degree..
4. A water powered rotary brush as defined in claim 2, wherein said
positive displacement fluid motor is of the type having generally
annular rotor means eccentrically mounted within generally annular
chamber means.
5. A water powered rotary toothbrush which comprises housing means;
a pair of generally cylindrical brushes rotatably mounted in said
housing means in a generally parallel array with one side of the
brush pair exposed outside of said housing means and the other side
of the brush pair recessed in said housing means; and drive means
in said housing means, said drive means including a fluid motor
having fluid inlet and outlet conduit means, and drive connection
means from said fluid motor to said brushes arranged to drive said
brushes in opposite directions of rotation so that the exposed
portions of said brushes move toward each other; said housing means
comprising an elongated handle unit having said fluid motor therein
and having front and rear ends and an elongated head unit having
said brushes therein and having front and rear ends, the brushes
being disposed proximate said front end of said head unit, and the
rear end of said head unit being releasably connectable with the
front end of said handle unit with the connection including a
disengageable portion of said drive connection means; said
disengageable portion of said drive connection means comprising a
splined connection and including clutch means in said handle unit
permitting selective engagement and disengagement thereof for on
and off control of the toothbrush while said handle and head units
are connected.
6. A water powered rotary toothbrush comprising: housing means,
said housing means including an elongated head unit having front
and rear ends and a handle unit having front and rear ends; primary
and secondary rotatable shafts extending lengthwise in said head
unit, a pair of generally cylindrical brushes rotatably mounted in
said head unit and disposed proximate said front end thereof, one
brush of said pair being disposed on said primary shaft and being
rotatable therewith, the other brush being disposed on said
secondary shaft and being rotatable therewith, said brushes of said
pair being disposed in parallel array with one side of the brush
pair being exposed outside of said head unit and the other side of
the brush pair being recessed in said head unit, said brushes each
being in the form of a helix of bristles with adjacent turns
thereof spaced apart to form a helical slot at least substantially
as wide as the thickness of the bristle helix in the axial
direction, said brushes being intermeshed, the bristle helix of
each brush being engaged within the helical slot of the other
brush, said primary and secondary shafts being synchronized to
maintain the intermeshing of the bristle helixes of said brushes,
means for rotationally coupling said primary and secondary shafts
together to maintain the synchronization of said shafts; a fluid
motor in said handle unit; inlet and outlet conduit means
associated with said fluid motor; a single drive connection means
extending between said fluid motor and said rotational coupling
means, said drive connection means including a releasable coupling;
the rear end of said head unit being releasably connectable with
the front end of said handle unit; whereby said head unit may be
separated from said handle unit and the single drive connection
means and rotational coupling means cooperate to ensure that the
synchronization of the bristle helixes is maintained.
7. A water powered rotary brush as defined in claim 6 wherein said
releasable coupling includes a splined connection.
Description
DISCLOSURE DOCUMENTS
The present applicant has heretofore lodged disclosures of the
present invention with the United States Patent Office under its
Disclosure Document Program, filed Dec. 15, 1972 as Diclosure
Documents Nos. 015516 and 015517.
BACKGROUND OF THE INVENTION
It is desirable to provide power actuated rotary brush means for
various personal hygiene functions, as for example for the brushing
of teeth, shower bathing, and the like. At present the most
dependable and compact power source for such rotary apparatus is
electrical, but in the typical personal hygiene environment plug-in
electrical appliances of this general type are simply too dangerous
to be feasible, and battery power is generally inadequate.
Accordingly, there have been numerous attempts to provide rotary
hygienic brush means utilizing the flow of water from the water tap
at a basin or the like, most such prior art devices being directed
to the cleaning of teeth. However, such devices in general have not
been satisfactory for home use, in that they have generally been
too bulky or complicated, cumbersome for the ordinary unskilled
user to operate, and have not employed brush positioning and
movement such as would produce results noticeably superior to those
achieved by conventional manual brushing.
SUMMARY OF THE INVENTION
In view of these and other problems in the art, it is an object of
the present invention to provide novel water powered rotary brush
means which is adaptable for various personal hygiene uses
including but not limited to use in a toothbrush, bath brush, or
the like, wherein a pair of generally cylindrical brushes are
rotatably mounted in housing means adapted for convenient holding
in one hand, in a generally parallel array with only one side of
the brush pair exposed outside of the housing means, and a fluid
motor is disposed within the housing means and is operatively
connected to the brushes so as to drive the brushes in opposite
directions of rotation with the exposed portions of the brushes
moving toward each other.
Another object of the invention is to provide novel water powered
rotary brush means of the character described, in the form of a
toothbrush, wherein the rotary brushes are contained in a separate,
elongated head unit, and the fluid motor is contained in a separate
elongated handle unit, the head unit being quick-releasably
connected to the handle unit to enable the sanitary utilization by
a plurality of persons of separate such head units in connection
with a single one of such handle units.
A further object of the invention is to provide a water powered
rotary brush of the character described in the form of a bath brush
for use in a shower or bathtub, wherein the source of water may be
T'd off of the shower head or bathtub spout, and which includes
fluid valve means in the brush housing that is adjustable between a
closed position wherein the brushes are stopped and all of the
water is backed out through the shower head or bathtub spout, and
an open position wherein water is admitted to the fluid motor so as
to drive the brushes, and proportionately less water is allowed to
flow out through the shower head or spout. In a preferred bath
brush form of the invention, the exhaust water flow from the fluid
motor is ejected from the brush through a spray head outlet to
provide what is, in effect, a mobile shower head having a water
flow generally proportioned to the rate of rotation of the
brushes.
Further objects and advantages of the present invention will appear
during the course of the following part of the specification,
wherein the details of construction and mode of operation of a
presently preferred embodiment of the invention are described with
reference to the accompanying drawings, in which:
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view showing a water powered rotary
toothbrush according to the invention.
FIG. 2 is an enlarged, axial section, with a portion broken away,
showing internal details of construction of the rotary toothbrush
form of the invention shown in FIG. 1.
FIG. 3 is a fragmentary side elevational view, partly in axial
section, illustrating further details of the form of the invention
shown in FIGS. 1 and 2.
FIG. 4 is a further enlarged transverse section taken on the line
4--4 in FIG. 3.
FIG. 5 is a similar transverse section taken on the line 5--5 in
FIG. 2.
FIG. 6 is a greatly enlarged, fragmentary elevational view
illustrating beveled spline means employed for on-off clutching in
the form shown in FIGS. 1 to 5.
FIG. 7 is a perspective view illustrating a rotary bath brush form
of the invention.
FIG. 8 is a longitudinal section, with portions in elevation,
illustrating internal details of construction of the bath brush
form shown in FIG. 7.
FIG. 9 is a transverse section, with portions in elevation, showing
further details of the bath brush form shown in FIGS. 7 and 8.
FIG. 10 is a fragmentary longitudinal section illustrating details
of a valve actuating mechanism employed in the form of the
invention shown in FIGS. 7 to 9.
DETAILED DESCRIPTION
Water Powered Rotary Toothbrush Embodiment
Reference will first be made to FIGS. 1 to 6 of the drawings which
illustrate a water powered rotary toothbrush embodiment of the
invention. The rotary toothbrush is generally designated 10, and
includes a handle unit 12 and a head unit 14. The head unit 14 is
removable and replaceable by quick release coupling means described
hereinafter to permit replacement of worn brushes, and in
particular to allow a single handle unit 12 to be utilized in
connection with a plurality of head units 14, whereby in a family
the sanitation of separate head units 14 for each member is
permitted, while only one of the handle units 12 is required.
The head unit 14 is elongated, including a base portion 18 adapted
for releasable engagement with the front end of the handle unit 12,
a reduced, elongated shank portion 20, and a forward cup-shaped
brush shield 22 within which a pair of parallel rotary brushes 24
and 26 nest so that only one side of the brush pair is operatively
exposed, the other side being shielded against engagement with
teeth or gums by means of the brush shield 22, as best illustrated
in FIGS. 1 and 3.
The brush 24 is mounted on primary shaft 28 that extends generally
the length of the head unit 14 and has a splined end portion 30
projecting rearwardly out of the base portion 18 of the head unit
so as to be selectively driven by drive means in the handle unit 12
as described in detail hereinafter. The other brush 26 is mounted
on secondary shaft 32 that is parallel to primary shaft 28 and also
extends substantially the length of head unit 14.
In order to effect a maximum brushing capability within a minimum
size head unit, each of the brushes 24 and 26 is formed as a helix
33 of bristles with the adjacent turns thereof spaced apart to form
a helical slot 34 at least substantially as wide in the axial
direction as the thickness of the bristle helix 33 in the axial
direction. The helix 33 of bristles on the brush 24 is engaged in
the helical slot 34 of the brush 26; and conversely the helix 33 of
bristles on the brush 26 is engaged in the helical slot 34 of the
brush 24. Preferably, the majority of the radial length of the
helix 33 of bristles of each brush is extended into the helical
slot 34 of the other brush, so as to provide a combination of the
two brushes having a minimum of width. In this manner, the brush
portion of the head unit 14 can be maneuvered most easily to a
maximum of effective brushing positions within the mouth.
In order that the brush helixes maintain freedom of movement in the
opposed helical slots, and to provide the desired brushing action,
it is essential that the brushes 24 and 26 rotate in opposite
directions and be synchronized. This is accomplished by having the
drive input to the head unit 14 applied from the handle unit 12 to
only the primary shaft 28, and by driving the secondary shaft 32
off of the primary shaft 28. This is done by having a drive gear 35
on primary shaft 28 engaged with a driven gear 36 on secondary
shaft 32, the gears 35 and 36 being of the same size, and being
located in the base portion 18 of the head unit 14. The gears 35
and 36 are initially engaged at relative positions of rotation such
as to dispose the bristle helices 33 in the respective opposed
helical slots 34. With the brushes 24 and 26 thus rotating in
opposite directions, and with only one side of the brush pair
exposed outside of the brush shield 22, brush movement will always
be down for the upper gums and up for the lower gums, regardless of
application of the brushes to the outside of the teeth, to the
inside of the teeth, or either right or left handed.
This closely spaced, intermeshing pair of brushes 24 and 26 which
thus rotate in opposite directions and are shielded on one side
also avoids the necessity of complicating the mechanism with
reversing means.
The handle unit 12 includes a cylindrical shell 38 having a forward
end wall 40, and having a fluid motor 42 disposed in its rearward
end portion. Water inlet and outlet conduits are provided by means
of a siamese hose 44 which may be connected to a bathroom sink by
any conventional means known in the art; for example, the inlet
conduit may be provided with water through a T connection to the
faucet, and the outlet may simply open into the basin.
The motor shaft 46 extends longitudinally through the shell 38, but
is offset laterally from the axis of the shell 38 so as to be
aligned with the primary shaft 28 of head unit 14. An annular
clutch member 48 is axially slidable on the forward end portion of
the motor shaft 46, having splined connection 50 therewith so as to
be rotatably driven with the motor shaft 46. A second splined
connection 52 is provided between the exposed end portion 30 of
primary shaft 28 and the clutch member 48. The clutch member 48 is
slidable on motor shaft 46 between a forward position as
illustrated in FIGS. 2 and 3 wherein the splined connection 52 is
effected for driving the brushes 24 and 26; and a rearward position
wherein the clutch member 48 is disengaged from the splined end
portion 30 of primary shaft 28 so as to stop the rotation of
brushes 24 and 26. It will be noted from FIG. 6 that the splines on
the splined end portion 30 of shaft 28 have lead-in bevels, which
facilitates engagement of the clutch member 48 with the splined end
portion 30 when it is desired to actuate the brushes 24 and 26.
Preferably there will be similar lead-in bevels on the mating
splines in clutch member 48.
The clutch member 48 is both axially slidable and rotatable in a
generally cylindrical clutch bearing 54 extending rearwardly from
the forward end wall 40 of the handle unit. The clutch member 48
has an annular flange 56 formed at its rearward end, the flange 56
being engaged by a clutch actuator 58 that is longitudinally
slidably mounted in a suitable slot 59 in shell 38. Thus the clutch
actuator 58 provides a mechanical on-off switch for rotation of the
brushes, while the fluid motor 42 remains in operation.
Alternatively, on-off fluid valving may be provided for the fluid
motor 42 for switching the brush rotation on and off.
Quick release coupling means is generally designated 60 for
releasably mounting the head unit 14 on the front end of the handle
unit 12. The coupling means 60 includes a pair of tangs 62 which
project outwardly or rearwardly from the base portion 18 of head
unit 14, the tangs 62 being engageable through complementary holes
63 in the forward end wall 40 of handle shell 38. The tangs 62 also
extend through respective apertures 64 in a transverse slide member
66. A spring 68 biases the transverse slide member 66 laterally so
as to normally engage the slide member 66 in slots 70 in tangs 62
as best illustrated in FIG. 4, so as to normally lock the head unit
14 onto the forward end of the handle unit 12. The transverse slide
member 66 projects outwardly through the cylindrical shell 38, and
quick release is effected by simply depressing this outer end of
slide member 66 so as to align the apertures 64 in the slide member
66 with the tangs 62 so that the tangs can be withdrawn. The tangs
62 are preferably chamfered or beveled at their free ends so that
re-engagement of the head unit 14 on the handle unit 12 can be
accomplished by simply inserting the tangs 62 in the holes 63 and
pushing, the tangs camming the slide member 66 laterally to permit
insertion of the tangs into the apertures 64 of the slide member
66.
It is preferred that the fluid motor 42 be of the positive
displacement type to enable the rotary toothbrush 10 to be operated
with a minimum flow of water. For convenience, the fluid motor 42
is shown as embodied in an independent cup-shaped housing 71 which
enables the motor 42 to be independently assembled and then
inserted in the rearward end of cylindrical shell 38. Nevertheless,
if desired the fluid motor 42 may be embodied in the rearward end
portion of shell 38 so that the shell 38 directly forms a part of
the motor housing.
The positive displacement fluid motor 42 includes a pair of axially
separated, generally annular chambers 72 and 74, the rearward
chamber 72 being defined axially between a butt plate 76 and a
central partition plate 78, and the forward chamber 74 being
defined between the partition plate 78 and the forward end wall 80
of motor housing 71. The motor shaft 46 is suitably stepped in the
rearward portion thereof so as to be journaled in the butt plate
76, partition plate 78, and motor housing wall 80, and splined for
driving connection with a pair of rotors 82 and 84 disposed in the
respective chambers 72 and 74. The lateral offset of motor shaft 46
enabling it to be axially aligned with the primary brush shaft 28
also provides the desired eccentric mounting of the annular rotors
82 and 84 relative to the center axis of the chambers 72 and 74 for
the positive displacement motor.
Each of the rotors 82 and 84 embodies respective pairs 86 and 88 of
diametrically opposed, outwardly spring biased blades. For
smoothest driving action, and to assure self-starting, the blades
86 of rotor 82 are preferably rotationally offset approximately
90.degree. from the blades 88 of rotor 84.
A hose connector structure 90 is connected to the shell 38 in the
region where the rotor bodies 82 and 84 come closest to the shell
38, and the connector structure 90 provides communication between
the inlet and outlet conduits of siamese hose 44 to the motor
chambers through respective inlet and outlet channels 92 and 94,
and inlet and outlet ports 96 and 98.
Water Powered Rotary Bath Brush Embodiment
Referring now to FIGS. 7 to 10 of the drawings, the rotary bath
brush embodiment of the invention is generally designated 100, and
includes a body shell 102 of generally blocklike configuration,
having a top wall 104, a pair of side walls 106, a front end wall
108, a rear end wall 110, and a generally open bottom 112. A
flexible hand strap 114 extends in a loop over the top of the body
102, transversely from side to side, enabling the bath brush 100 to
be conveniently manipulated by engaging all or part of either hand
between the strap 114 and the top wall 104 in the rear-to-front
direction.
A pair of elongated, longitudinally arranged, parallel brushes 116
and 118 are mounted on respective shafts 120 and 122 that are
journaled in the end walls 108 and 110. The brushes 116 and 118 are
arranged so that approximately half of the periphery of each
thereof is exposed below the lower edges of the side walls 106 and
end walls 108 and 110 of body shell 102, the remainder of the
peripheries of the brushes being recessed within the shell 102.
A fluid motor 124 is supported within shell 102, and in the case of
the bath brush may be of the turbine type because of the large
amount of flow available thereto when used in either a shower or a
bathtub. The motor 124 includes a generally cylindrical housing 126
supported within body shell 102 adjacent top wall 104, the motor
housing 126 having a rearward inlet end wall 128 and a forward
outlet end wall 130. Water to drive the fluid motor 124 is supplied
through a flexible hose 132 from a suitable T-connection or the
like proximate the shower head or bathtub spout. The flexible hose
132 is connected to an inlet conduit 134 at the rear of shell 102,
the inlet conduit 134 having a valve 136 therein which permits
adjustment of the flow of water as desired between flow off and
flow on positions. The inlet conduit 134 leads to motor inlet port
138 in the inlet end wall 128 of the motor.
Valve 136 includes a rotary valve element 140 having an actuating
lever 142 attached thereto which is connected through a link member
144 with a slidable valve actuator 146. The valve actuator 146 is
preferably mounted in a suitable longitudinal slot 147 in the
forward portion of top wall 104 so as to be readily accessible by
either the fingers of the hand that is engaged under the flexible
hand strap 114, or by the free hand. Alternatively, if desired, a
pair of valve actuators similar to the valve actuator 146 may be
slidably mounted in the respective side walls 106 and connected to
the valve element 140 through suitable link and lever means, so
that the valve actuator members would be accessible to the thumb of
either a right hand or a left hand engaged with the bath brush
100.
The fluid motor 124 includes a vaned turbine stator 148 on the
upstream side thereof, and a vaned turbine rotor 150 on the
downstream side thereof, the rotor 150 being mounted on rotor shaft
152 that is journaled in walls 110, 128, and 130, the shaft 152
extending through a suitable aperture in stator 148. Turbine inlet
header 154 is defined between inlet end wall 128 and stator 148;
while turbine outlet header 156 is defined between rotor 150 and
outlet end wall 130. Outlet end wall 130 has outlet port 158
therein which communicates with a flared conduit 160 leading to
spray head outlet 162 in rear end wall 110 of body shell 102. With
this arrangement, the exhaust water from fluid motor 124 is
dispensed through spray head outlet 162, which serves as a mobile
shower head to be used in conjunction with the rotating brushes 116
and 118.
The drive connections from rotor shaft 152 to the brush shafts 120
and 122 are arranged as follows: An idler shaft 164 is journaled at
its ends in walls 110 and 128, being parallel to the rotor shaft
152 and brush shafts 120 and 122. Idler shaft 164 is driven at the
same speed as rotor shaft 152 by a drive gear 166 on rotor shaft
152 and a driven gear 168 of the same size on idler shaft 164. The
drive for brush 116 includes a drive sprocket 170 on rotor shaft
152 which drives a driven sprocket 172 on brush shaft 120 through a
T-chain 174, so as to drive the brush 116 in a clockwise direction
as viewed in FIG. 9. The drive for brush 118 includes the gears 166
and 168, and a drive sprocket 176 on idler shaft 164 which drives a
driven sprocket 178 on brush shaft 122 through a T-chain 180 so as
to drive the brush 118 anticlockwise as viewed in FIG. 9. It will
be seen that the reversal of the direction of rotation of brush 118
relative to brush 116 is accomplished through the addition of the
idler shaft 164 and its gear drive off of rotor shaft 152.
The illustrated arrangement of sprocket and T-chain drives to the
brushes 116 and 118 is desirable to provide the presently preferred
disposition of the two brushes approximately one-half exposed out
of the generally open bottom 112 of the shell 102, and spaced
substantially apart with the exposed portions thereof rotating in
opposite directions toward each other. The T-chain type drive is
desirable as it can be fabricated of nylon or other suitable
plastic material resistant to the water environment, and it is
adaptable to centrally grooved sprockets to assure continual
alignment. Nevertheless, it will be apparent that other types of
belts or chains may be employed in the drive, or that the drive may
consist entirely of gears, or of shafts and bevel gears.
It is desirable that the brushes 116 and 118 be spaced apart as
best illustrated in FIG. 9 so as to avoid catching hair between the
brushes. The movement of the exposed portions of brushes 116 and
118 in opposite directions and toward each other is important in
preventing the rotary bath brush from slinging soapy water about
the area in an uncontrolled manner.
With the valve actuator 146 in its rearwardmost position, the valve
136 will be closed, so that no water will pass through the rotary
bath brush 100, and all of the water will be backed out through the
shower head or bath spout. Forward movement of the valve actuator
146 from its rearwardmost position will gradually and progressively
cause the valve 136 to open, thereby providing increased rotary
movement of the brushes 116 and 118, and an increased spray of
water out of the spray head outlet 162; with a complementary
reduction in the flow of water out of the normal shower head or
bath spout. With the slidable valve actuator 146 in its forwardmost
position, which is the position illustrated in FIGS. 7 to 10, full
flow of water is permitted through the bath brush 100, whereby the
brushes 116 and 118 will rotate at maximum speed, and a maximum
spray of water will pass out through the spray head outlet 162; and
correspondingly there will be only a minimum flow, or no flow at
all, through the normal shower head or bath spout.
While the instant invention has been shown and described herein in
what are conceived to be the most practical and preferred
embodiments, it is recognized that departures may be made therefrom
within the scope of the invention, which is therefore not to be
limited to the details disclosed herein, but is to be accorded the
full scope of the appended claims.
* * * * *