U.S. patent number 3,777,945 [Application Number 05/260,960] was granted by the patent office on 1973-12-11 for spraying device.
This patent grant is currently assigned to Yoshino Kogyosho Co., Ltd.. Invention is credited to Takao Kishi, Takamitsu Nozawa.
United States Patent |
3,777,945 |
Nozawa , et al. |
December 11, 1973 |
SPRAYING DEVICE
Abstract
This invention relates to a spraying device. Said spraying
device comprises a container containing a liquid therein, a rotary
head fitted over the top of said container, a cylindrical chamber
formed in an upper portion of said container, slide means mounted
in said cylindrical chamber and adapted to be moved upwardly and
downwardly by the force with which said spray head is turned, and a
piston mounted in the interior of said slide means and adapted to
be moved upwardly as the slide means moves upwardly and moved
downwardly by the biasing force of a spring mounted about said
piston and serving as a restoring spring. Said piston is formed
therein with a central axial bore serving as a passage for the
liquid. Said spraying device is characterized by a transverse
partition wall formed substantially in the central portion of said
container to divide the container into an upper portion formed
therein with a pressurizing chamber and a lower portion serving as
a liquid tank, a liquid drawing line depending from the lower end
of said pressurizing chamber into said liquid tank, means provided
in the side wall of said slide means and the side wall of the upper
portion of said container for converting the rotary movement of the
rotary head into a reciprocating movement of the slide means, a
valve assembly comprising a nozzle and mounted in the upper central
portion of the rotary head, and a passage formed in said transverse
partition wall and having an air valve mounted in its lower portion
for preventing the pressure in the liquid tank from becoming lower
than atmospheric pressure.
Inventors: |
Nozawa; Takamitsu (Tokyo,
JA), Kishi; Takao (Tokyo, JA) |
Assignee: |
Yoshino Kogyosho Co., Ltd.
(Tokyo, JA)
|
Family
ID: |
26380846 |
Appl.
No.: |
05/260,960 |
Filed: |
June 8, 1972 |
Foreign Application Priority Data
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Jun 10, 1971 [JA] |
|
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46/41277 |
Jun 24, 1971 [JA] |
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46/45896 |
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Current U.S.
Class: |
222/394; 222/340;
222/380; 222/385 |
Current CPC
Class: |
B05B
9/0883 (20130101) |
Current International
Class: |
B05B
9/08 (20060101); B65d 083/14 () |
Field of
Search: |
;222/375-385,398,402.13,390,402.2 ;239/350 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Coleman; Samuel F.
Assistant Examiner: Stack, Jr.; Norman L.
Claims
What is claimed is:
1. A spraying device comprising a container containing a liquid
therein, a rotatable head fitted over the top of said container, a
cylindrical chamber formed in an upper portion of said container,
slide means mounted in said cylindrical chamber defining on the
lower part thereof a piston having an axiAl bore therein, said
slide means movable upwardly and downwardly within said chamber, a
transverse partition wall formed substantially in the central
portion of said container to divide the container into an upper
portion with a pressurizing chamber and a lower portion serving as
a liquid tank, said pressurizing chamber receiving said piston
defined on the lower part of said slide means, a liquid one way
drawing line depending from the lower end of said pressurizing
chamber into said liquid tank, means provided in the side wall of
said slide means and the side wall of the upper portion of said
container for converting rotary movement of the rotatable head into
a reciprocating movement of the slide means, a valve assembly
comprising a nozzle and mounted in the upper central portion of the
rotatable head, conduit means extending from the axial bore of said
piston to said valve assembly, means to force liquid from said
pressurizing chamber to said valve assembly and a passage formed in
said transverse partition wall and having an air valve mounted in
its lower portion for preventing the pressure in the liquid tank
from becoming lower than atmospheric pressure.
2. A liquid spraying device comprising a container containing a
liquid therein, a rotary head fitted over the top of said
container, a cylindrical chamber formed in an upper portion of said
container, and slide means mounted in said cylindrical chamber and
adapted to be moved upwardly by the force with which the rotary
head is turned and moved downwardly by the biasing force of a
restoring spring, said slide means being formed therein with a
central axial bore serving as a passage for the liquid, and said
restoring spring is provided between the rotary head and container
for storing therein an energy of resilience for urging the slide
means to return to its original position, a transverse partition
wall formed substantially in the central portion of said container
to divide the container into an upper portion formed therein with a
pressurizing chamber and a lower portion serving as a liquid tank,
and means provided in the side wall of said slide means and the
side wall of the upper portion of said container for converting the
rotary movement of the rotary head into a reciprocating movement of
the slide means, a valve assembly comprising a nozzle and mounted
in the upper central portion of the rotary head, and a passage
formed in said transverse partition wall and having an air valve
mounted in its lower portion for preventing the pressure in the
liquid tank from becoming lower than atmospheric pressure.
3. A spraying device comprising a container containing a liquid
therein, a rotary head fitted over the top of said container, a
cylindrical chamber formed in an upper portion of said container,
slide means mounted in said cylindrical chamber defining on the
lower part thereof a piston having an axial bore therein, said
slide means movable upwardly and downwardly within said chamber, a
piston with rod mounted in the interior of said slide means and
adapted to be moved upwardly as the slide means moves upwardly and
moved downwardly by the biasing force of a spring mounted about the
rod of said piston and serving as a restoring spring, said piston
being formed therein with a central axial bore serving as a passage
for the liquid, a transverse partition wall formed substantially in
the central portion of said container to divide the container into
an upper portion with a pressurizing chamber formed therein and a
lower portion serving as a liquid tank, said pressurizing chamber
receiving said piston defined on the lower part of said slide
means, a liquid one way drawing line depending from the lower end
of said pressurizing chamber into said liquid tank, means provided
in the side wall of said slide means and the side wall of the upper
portion of said container for converting rotary movement of the
rotary head into a reciprocating movement of the slide means, a
valve assembly comprising a nozzle and mounted in the upper central
portion of the rotary head, conduit means extending from the axial
bore of said piston with rod to said valve assembly and a passage
formed in said transverse partition wall and having an air valve
mounted in its lower portion for preventing the pressure in the
liquid tank from becoming lower than atmospheric pressure.
4. A spraying device as set forth in claim 3, further characterized
by a secondary pressurizing chamber formed in the lower portion of
said slide means as the piston with rod moves upwardly.
5. A spraying device as set forth in claim 3, wherein said means
for converting the rotary movement of the rotary head into a
reciprocating movement of the slide means comprises at least one
recess formed in the upper portion of container, an inclind
peripheral groove formed in wave-form and provided on the outer
wall surface of said slide means and at least one ball inserted in
said recess and groove.
6. A spraying device as set forth in claim 3, wherein said means
for converting the rotary movement of the rotary head into a
reciprocating movement of the slide means comprises at least one
recess formed in the upper portion of container, at least one
discrete inclined peripheral groove formed on the outer wall
surface of said slide means and at least one ball inserted in said
recess and groove.
Description
This invention relates to liquid spraying devices of the type which
produce spray mist similar to that produced by the common aerosol
spray bomb, and more particularly it is concerned with a liquid
spraying device which requires no pressurizing gas nor other
foreign propellant in container, thereby eliminating the problems
of contaminating and diluting the liquid to be dispensed and
avoiding the explosion hazards which might otherwise occur when the
container is discarded.
A spraying device of the type which requires no pressurizing gas in
container and in which the bulk of the liquid stored in the device
is merely under atmospheric pressure is known. This device has some
disadvantages. It is complex in construction, and a considerable
force is required to depress the head.
This invention provides an improvement in or relating to liquid
spraying devices of the type which requires no pressurizing gas in
container. The improvement consists in the provision of a rotary
spray head housing therein, slide means which is moved upwardly to
draw the liquid by suction into the pressurizing chamber when the
spray head is turned and the liquid is pressurized by means of a
restoration spring.
Accordingly, an object of this invention is to provide a liquid
spraying device of the type which requires no pressurizing gas nor
other foreign propellant in container and thereby eliminates the
problems of contaminating and diluting the liquid to be dispensed
and avoid the explosion hazards, andd which comprises a spray head
of the rotary type including slide means housed therein, so that no
movable parts are exposed and therefore damage to them are
precluded.
Additional and other objects as well as features and advantages of
the invention will become evident from the description set forth
hereinafter when considered in conjunction with the accompanying
drawings, in which:
FIG. 1 is a vertical sectional view of the liquid spraying device
comprising a first embodiment of this invention;
FIG. 2 is a vertical sectional view of the device of FIG. 1 showing
its operation state;
FIG. 3 is a perspective view of the sliding means of FIG. 1;
FIG. 4 is a vertical sectional view of the liquid spraying device
comprising a second embodiment of the invention; and
FIG. 5 is a perspective view of the sliding means of FIG. 4.
FIG. 1 and FIG. 2 illustrate a first embodiment of this invention.
There is shown a container 10 which is cylindrical in shape and
which has a transverse wall 11 disposed substantially in its middle
portion to partition the interior of the container into upper and
lower portions. A cylindrical chamber 12 for housing therein slide
means 30 is formed in the upper portion while a liquid tank 13 for
storing therein a liquid to be sprayed is provided in the lower
portion.
Disposed in the central portion of transverse wall 11 is a
pressurizing chamber 14. A liquid drawing line 16 is connected at
one end thereof to the lower end of pressurizing chamber 14 and
almost reaches at the other end thereof to the bottom of tank 13
which mounts therein detachably a bottom cover 17 to fill the tank
with a quantity of liquid when required. A ball valve 50 is
inserted between the lower end of pressurizing chamber 14 and
liquid drawing line 16. An air valve 18 and a passage 19 are
mounted on the underside of transverse wall 11 to keep the pressure
in liquid tank 13 and cylindrical chamber 12 from becoming
negative.
A cylindrical wall 21 is formed on the outer peripheral surface of
the container 10 and a peripheral groove 22 is formed on the inner
circumferential surface of a spray head 20. A spray head 20 which
is of the same diameter as container 10. The peripheral rib 22a is
formed on the outer surface of said wall 21. Said peripheral rib
22a and peripheral groove 22 are complementary with each other.
Spray head 20 is fitted over the upper end of container 10 and held
in place by inserting the peripheral groove 22 thereof in the
complementary cylindrical rib 22a of the container 10.
A valve assembly 24 comprising a nozzle 25, a valve body 26, a
spring 27 and a spring supporting small cylindrical body 28 is
mounted in the upper middle portion of spray head 20. The nozzle 25
of valve assembly 24 is not limited to the type shown and may be a
nozzle for a milky liquid when a shaving cream or other milky
liquid is to be discharged.
Guide means 31 for guiding slide means 30 in its vertical movement
is mounted in the spray head 20 below valve assembly 24. Slide
means 30 comprises a piston 32 extending downwardly from the
underside of the bottom wall of slide means 30 into the upper
chamber 12 and formed with a central vertical bore or passage 33.
The lower end of piston 32 faces the upper portion of pressurizing
chamber 14, and piston 32 is movable into and out of pressurizing
chamber 14 to reduce or increase the volume of the pressurizing
chamber. A plunger ring 52 is provided at the lower end of piston
32 for sealing a space between piston 32 and pressurizing chamber
14.
Slide means 30 is formed at its upper half portion with a number of
axially arranged spline-like ribs 38 maintained in engagement with
a number of axially arranged grooves 29 formed on the inner
circumferential surface of guide means 31 in spray head 20.
A cylindrical portion 46 is provided in the upper half of slide
means 30 to project therefrom in adjacent relationship with the
inner surface of cylindrical chamber 12. A pressure adjusting
piston 43 having a rod 37, is inserted in the interior of slide
means 30 axially thereof, and a spring support cover 47 is provided
at the upper end of slide means 30. A plunger ring 49 is provided
at the lower end of piston 43 to seal a space between the inner
surface of slide means 30 and the outer surface of piston 43.
Formed in the middle of cover 47 is an opening 48 of a size
sufficiently large to permit piston 43 to move vertically
therethrough in and out of slide means 30. If piston 43 moves
upwardly, then a secondary pressurizing chamber 14a is formed in
the lower portion of the interior of slide means 30 as shown in
FIG. 2. A coil spring 35 serving as a restoring spring is mounted
about piston rod 37 to extend from its lower end to cover 47 and
normally urges piston 43 to move downwardly from its upper position
by its biasing force.
Formed in the center of piston 43 is a vertical axial passage 44
which is connected at its upper end to the small cylindrical body
28 of valve assembly 24 by a flexible tube 34.
A plurality of recesses 39 (two recesses disposed at diametrically
opposed positions in the embodiment are shown) are formed in the
upper portion of container 10 or on the inner wall surface of the
upper portion of cylindrical chamber 12, each of the recesses 39
being of a size such that it is sufficiently large to receive
therein the semi-spherical portion of a steel ball 40. An inclined
peripheral groove 41 formed in wave-form as shown in FIG. 3 is
provided on the outer wall surface of the cylindrical portion 46 of
slide means 30 in a position corresponding to the positions of the
plurality of recesses 39, the groove 41 being of a size such that
it is sufficiently large to receive therein the semi-spherical
portion of each of steel balls 40.
Steel balls 40 are received in the recesses 39 and inclined groove
41 as aforementioned. By this arrangement, the cylindrical portion
46 of slide means 30 moves in vertical by virtue of the provision
of steel balls 40 as it moves in wave-like motion while being
guided by the inclined guide 41 when cylindrical portion 46 is
turned.
In the embodiment shown and described, the inclined groove 41
formed in wave-form has four crests and four valleys, so that slide
means 30 moves in four reciprocating motions while the head 20 is
turned through 360.degree.. Thus, the recesses 39, steel balls 40
and inclined peripheral groove 41 constitute means for converting
the rotary movement of the rotary head into a reciprocating
movement of slide means 30.
The operation of the spraying device constructed as aforementioned
will now be described. The slide means 30 shown in FIG. 1 is
disposed in its lowermost position, with steel balls 40 each being
disposed in one of the crests of inclined groove 41.
FIG. 2 shows the spraying device after the head 20 is turned. Slide
means 30 is shown as being moved to an upper position together with
piston 43 by the action of steel balls 40 and inclined groove
41.
If slide means 30 is moved upwardly as aforementioned, a quantity
of liquid in liquid tank 13 will be drawn up by suction through
liquid drawing line 16 into pressurizing chamber 14 by pushing a
ball valve 50 upwardly. If head 20 is further turned so as to move
steel balls 40 upwardly in sliding motion from their positions in
the valleys of inclined groove 41 shown in FIG. 3, slide means 30
will move perpendicularly downwardly without being twisted and the
quantity of liquid in pressurizing chamber 14 will be introduced
into the secondary pressurizing chamber 14a formed in the lower
portion of slide means 30 through the vertical bore 33 in piston
32, and thence into the interior of slide means 30. The piston 43
in slide means 30 is prevented from moving downwardly by the
quantity of liquid introduced into the secondary pressurizing
chamber 14a in the lower portion of slide means 30, so that piston
43 is maintained in its upper position. Thus, the lower portion of
the space between the inner wall surface of slide means 30 and the
outer wall surface of piston 43 is converted into a liquid sump 45
in which the liquid is stored.
If nozzle 25 is opened at this time, a quantity of liquid will be
drawn from liquid sump 45 and move through central axial bore 44
formed in piston 43, flexible tube 34 and valve assembly 24 to be
ejected outwardly through nozzle 25. As liquid is ejected through
nozzle 25, the pressure of liquid in liquid sump 45 tends to be
lowered. However, this tendency is checked by the downward movement
of piston 43 caused by the biasing force of spring 35, so that the
liquid pressure in liquid sump 45 is maintained at a predetermined
level.
If the operation of opening nozzle 25 is performed continuously or
intermittently, the downwardly moving piston 43 will ultimately
reach its lowermost position in slide means 30. At this time,
liquid under pressure in liquid sump 45 will have been completely
consumed. If head 20 is turned again to draw up a quantity of
liquid from the liquid tank 13, the aforementioned cycle can be
repeated again to effect ejection of the liquid through the
nozzle.
The optimum mode of operation of the embodiment of the spraying
device described above would be to turn the head 20 so that it will
make three or four complete revolutions and move the slide means 30
12 to 16 times in reciprocating motion to store liquid in the
liquid sump 45 before the nozzle 25 is opened.
FIG. 4 and FIG. 5 show a second embodiment of this invention. A
container 60 shown is formed with a transverse partition wall 61 at
substantially the middle of container 60 for dividIng the interior
of container 60 into two portions or upper and lower portions.
A cylindrical chamber 62 for mounting a slide means 30 therein is
defined by a cylindrical wall 63 in the upper portion of container
60. A liquid tank 64 for containing a liquid to be dispensed is
provided in the lower portion of container 60. The transverse
partition wall 61 is formed therein with a passage 99 mounting an
air valve 98 as described with reference to the first embodiment to
maintain balance in internal pressure in the container.
The transverse partition wall 61 is formed in the middle with a
suction chamber 66 provided with a valve 65 at its bottom and
adapted to serve as a pressurizing chamber. A liquid drawing line
67 extends from the lower end of pressurizing chamber 66 to the
bottom of liquid tank 64. A bottom cover 68 may be detachably
attached to the lower end of liquid tank 64 to fill the tank with a
quantity of liquid when required.
A rotary head 69 cylindrical in shape and having the same outer
diameter as the lower portion of container 60 is fitted over the
cylindrical wall 63. The cylindrical wall 63 is formed on the outer
wall surface of its lower portion with an outer peripheral rib 70
and an outer peripheral groove contiguous with each other while the
rotary head 69 is formed on the inner wall surface of its lower
portion with an inner peripheral groove and an outer peripheral rib
71. Thus the rotary head 69 is held in position as the outer
peripheral rib 70 of cylindrical wall 63 is snugly received in the
inner peripheral groove of rotary head 69 and the inner peripheral
rib 71 of rotary head 69 is snugly received in the outer peripheral
groove of cylindrical wall 63. A valve assembly 24 comprising a
nozzle 25, valve body 26, spring 27 and spring support small
cylindrical body 28 is mounted in the upper central portion of
rotary head 69.
A guide means 77 for guiding slide means 30 in its vertical
movement is mounted in the central portion of rotary head 69 to be
disposed perpendicularly. The aforementioned cylindrical wall 63
and a cylindrical body 79 extending upwardlY from the upper end of
slide means 30 as subsequently to be described are disposed between
a side wall portion 78 of rotary head 69 and the guide means
77.
The cylindrical wall 63 defining the cylindrical chamber 62 as
aforementioned is formed therein with a vertical groove 81 of
suitable depth so that the wall 63 is divided into an inner wall
and an outer wall for mounting in a groove 81 between the two wall
members a coil spring 82 which is supported at its upper end by a
spring supporter 80 projected from the head 69 and which has a
lower end embedded in cylindrical wall 63. If rotary head 69 is
turned several times, then energy of resilience is stored in coil
spring 82 which urges the rotary head 69 to return to its original
position.
A plurality of recesses 84 are formed on the inner wall surface of
cylindrical wall 63, each of the recesses 84 being of a size such
that it is sufficiently large to receive therein the semi-spherical
portion of each steel balls 40. In the embodiment described, such
recesses 84 are two in number and disposed in diametrically opposed
positions.
Slide means 30 is formed with a piston 86 formed with an axial
center bore or passage 85 therein. A flexible tube 87 connects the
upper end of passage 85 to the small cylindrical body 28 of valve
assembly 24. Piston 86 is inserted in the pressurizing chamber 66
and has a plunger ring 88 attached to its lower end so as to seal a
space between the outer wall surface of piston 86 and the inner
wall surface of pressurizing chamber 66.
The cylindrical portion 79 extending upwardly from the upper end of
slide means 30 as aforementioned is formed in its inner wall
surface with a number of vertically disposed ribs 89 which are
adapted to be received in vertical grooves 90 formed on the outer
wall surface of guide means 77 in the head 69, so that guide means
77 and slide means 30 are interconnected in spline connection.
As shown iin FIG. 5 in a perspective view, the cylindrical portion
79 of slide means 30 is formed on its outer wall surface with a
plurality of discrete inclined peripheral grooves 91 (two grooves
in this embodiment), each groove extending from the upper marginal
portion toward the lower marginal portion of the outer wall surface
of cylindrical body 79. The upper end of each inclined peripheral
groove 91 corresponds in position to one of the recesses 84 formed
on the inner wall surface of cylindrical wall 63, the grooves 91
being of a size such that they are sufficiently large to receive
therein the semi-spherical portion of each steel ball 40.
Since steel balls 40 are disposed in inclined peripheral grooves 91
and recesses 84 as aforementioned, rotation of cylindrical portion
79 results in its moving upwardly while rotating as it is guided by
inclined peripheral grooves 91 by virtue of the presence of steel
balls 40 therein. Thus, the recesses 84, steel balls 40 and
inclined peripheral grooves 91 constitute means for converting the
rotary movement of the rotary head 69 into a reciprocating movement
of slide means 30.
The operation of the embodiment constructed as aforementioned will
now be described. The spraying device shown in FIG. 4 is in a state
in which the rotary head 69 thereof is not turned yet, with each
steel ball 40 being disposed at the upper end of one of the
inclined peripheral grooves 91. When the spraying device is in this
state, the slide means 30 thereof is disposed in its lower position
and no liquid in the liquid tank 64 is drawn by suction into the
pressurizing chamber 66.
If rotary head 69 is turned rightwardly, slide means 30 will be
moved upwardly by guide means 77 in cooperation with steel balls 40
and inclined peripheral grooves 91. Upward movement of slide means
30 causes a quantity of liquid to be drawn upwardly by suction from
the liquid tank 64 through liquid drawing line 67 and valve 65 into
pressurizing chamber 66.
Rotary head 69 is urged by the energy of resilience stored in coil
spring 82 to return to its original position. However, if a
quantity of liquid is drawn up by suction into pressurizing chamber
66, the pressure of liquid in the pressurizing chamber 66 overcomes
the energy of resilience of coil spring 82, so that rotary head 69
is kept in a position to which it has been turned.
If nozzle 25 is opened, then the liquid in pressurizing chamber 66
is moved upwardly through the passage 85 in piston 86 and the
flexible tube 87 to the valve assembly 24 from which it is ejected
outwardly. As the liquid in pressurizing chamber 66 is released
through nozzle 25 in this way, the liquid pressure in pressurizing
chamber 66 tends to be reduced. However, this tendency is cancelled
out by the energy of resilience stored in coil spring 82 and piston
86 is moved downwardly, so that the liquid pressure in pressurizing
chamber 66 can be maintained at a predetermined level.
If the aforemntioned operation of nozzle 25 is performed
continuously or intermittently, the downwardly moving piston 86
will ultimately reach its lowermost position in pressurizing
chamber 66. At this time, the liquid under pressure in pressurizing
chamber 66 will have been completely consumed. If head 69 is turned
again to draw up a quantity of liquid from the liquid tank into
pressurizing chamber 66, the liquid in pressurizing chamber 66 can
be ejected through the nozzle 25 by repeating the aforementioned
cycle of operation.
From the foregoing description, it will be appreciated that the
present invention permits a liquid contained in the liquid tank 64
in the container to be drawn up by suction into the pressurizing
chamber or the liquid sump by turning the rotary head and then
ejected or discharged through the nozzle by merely operating the
nozzle without requiring to use a propellant medium. Since the
liquid in the container can be pressurized by merely turning the
rotary head, the spraying device according to this invention is
very easy to operate. Besides, the movable parts of the device are
not exposed to atmosphere and therefore prevented from suffering
damage.
In the first embodiment of the invention, the provision of a piston
in the interior of slide means to form a liquid sump therein
permits a large quantity of liquid to be drawn up by suction from
the liquid tank and stored in the liquid sump, so that the
operation of nozzle can be facilitated. The provision of a pressure
adjusting spring in the interior of slide means precludes exertion
of a force of reaction on the rotary head by the pressurized liquid
in the liquid sump, thereby preventing the hazards of the rotary
head being dislodged from the container.
In the second embodiment of the invention, the provision of a coil
spring for storing therein energy of resilience for urging the
rotary head to return to its original position permits the rotary
head automatically to be restored to its original position to be
ready for a next liquid suction operation when thee liquid in the
pressurizing chamber is exhausted after ejection thereof. This
facilitates the ejection of liquid in fine mist form.
* * * * *