AU2001275464A1 - Variable discharge dispensing head for a squeeze dispenser - Google Patents

Description

VARIABLE DISCHARGE DISPENSING HEAD FOR A SQUEEZE DISPENSER

FIELD OF THE INVENTION

This invention relates to a dispensing head for a

dispenser which is pressurized by squeezing the sides of the

container. More particularly, the invention is directed to a

dispensing head in which air and liquid are mixed to produce a

fine spray, and in which the density of the spray may be

varied.

BACKGROUND OF THE INVENTION

Although squeeze bottle types sprayers have been used for

many years, such sprayers were largely replaced for a long

period of time by pressurized can dispensing systems. One

squeeze bottle dispenser which has come into use as a

substitute for pressurized cans is described in U.S. Patent Nos. 5,183,186 and 5,318,205. These patents show a squeeze

bottle dispenser in which an air passageway and a product

(i.e., fluent material) passageway meet in a tapered mixing

chamber. In the device of that invention, the tapering of the

mixing chamber direct the air flow at an angle to the flow of

liquid, resulting in turbulence in the liquid in the mixing

chamber. This turbulence breaks the liquid up and intimately

mixes it with the air. As a result, a fine spray is propelled

out of the orifice.

One characteristic of current dispensers such as those

described in Pat. Nos. 5,183,186 and 5,318,205 is that the

amount and density of the spray is fixed. In other words,

current dispensers only provide for either an open position,

in which a fixed density spray is made or a closed position in

which there is no spray.

SUMMARY OF THE INVENTION

Accordingly, it is an object of the invention to provide

a spray dispensing device for use with a non-pressurized container, such as a squeeze bottle, which allows the density

of the spray to be varied.

It is a further object of the invention to provide a

valve which prevents the infiltration of air into the internal

passages of the dispenser.

In accordance with the invention, a spray dispenser is

provided having a dip tube which can extend into a container,

such as a squeeze bottle, holding a quantity of liquid. The

top of the dip tube is connected to a ball-check valve

assembly having a ball which ordinarily rests on top of a

conduit of restricted diameter. A rotatable valve has an air

passage and a product passage. The air passage in the spray

dispenser can connect the inside of the bottle with a mixing

chamber in the dispenser. The separate product passage leads

from the top of the ball-check to a mixing chamber and is

directed toward a spray orifice in the mixing chamber. The

air passage is an annular passageway which is concentrically

disposed around a portion of the product passage leading to

the mixing chamber. As the valve is rotated, the amount of communication between the air passage and product passage and

the interior of the container is varied.

When the bottle is squeezed while the rotatable valve is

open, the resulting pressure build up forces air into the

mixing chamber and liquid up the dip tube. The liquid forces

the ballcheck to open and the liquid is directed toward the

mixing chamber. Simultaneously, air is forced through the

annular air passage. The stream of air converges and impinges

upon the core stream of liquid when deflected by tapered walls

of the mixing chamber. This causes an atomization of the

liquid and a fine spray is expelled through the orifice.

As the pressure in the bottle is relieved, the ball drops

down back onto the conduit of restricted diameter thereby

trapping product in the dip tube. Thus, the product will be

retained in the dip tube at a high level, 'above the liquid

level in the bottle, ready for the next squeeze cycle. In

this way, the lag time which ordinarily occurs prior to

spraying is eliminated. The product passage is formed in a valve which is housed

in a body of the spray dispenser. The valve may

advantageously be formed as a rotatable valve which opens and

closes the air and product passageways. In a closed position

of the valve, both the product and air passageway are

completely closed to the inside of the squeeze bottle, thereby

preventing air from entering the inside of the squeeze bottle.

The closing off of the passageways therefore reduces potential

drying of the liquid product in the squeeze bottle.

The valve is formed so that as the valve is rotated from

a closed position to a completely open position, the amount of

communication between the interior of the container and the

passages is varied. In this manner, the density of the spray

can be varied.

Further objectives and advantages of the subject

invention will be apparent to those skilled in the art from

the detailed description of the disclosed invention. BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a cross-sectional view of the spray dispensing head

of the present invention;

Fig. 2 is a side view of the spray dispensing head of the

present invention;

Fig. 3 is a top view of the spray dispensing head of the

present invention;

Fig. 4 is a perspective view of the valve of the present

invention;

Fig. 5 is a frontal view of the valve;

Fig. 6 is a side view of the valve; and

Fig. 7 is a layout view of the notched surfaces of the inlet

valve .

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Fig. 1 is a cross-sectional view of the spray-dispensing

head of the present invention. The spray dispensing device

housing 2 is adapted to be mountable atop a neck 4 of a bottle 6 in any manner known to those skilled in the art. The spray

dispensing device housing includes a conduit 8 for receiving a

dip tube 10.

A restricted conduit 12 of a ballcheck valve 14 receives

the top end of the dip tube 10. The restricted conduit 12

communicates with the dip tube 10 so as to allow fluid to pass

through. The inner diameter of the restricted conduit 12 is

smaller than the diameter of the ball 16 of the ballcheck

valve 14 so that the ball 16 ordinarily sits atop the

restricted conduit 12. When the ball 16 is in this position,

the ballcheck valve 14 is closed so that the top end of the

dip tube 10 is also closed. The inner diameter of the

remainder of the ballcheck valve 14 is larger than the

diameter of the ball 16. In this way, the ball 16 is free to

move upward in response to upward movement of fluid in the dip

tube to open the ballcheck valve 14.

The top of the ballcheck valve 14 receives a coaxially disposed feed tube 18 which allows for the passage of fluid from the restricted conduit 12 through the housing 2. The feed tube 18 has a diameter which is substantially the same as

the remainder of the ballcheck valve 14. A bar 70 is formed

across the top of the feed tube 18, and can be oriented in any

direction. The ball 16 is therefore free to move upward to

open the ballcheck valve 14. Because the diameter of the feed

tube 18 is larger than the diameter of the ball, product may

flow freely past the ball.

For simplicity of construction, the feed tube 18 is an

extension of a wall 22 of the housing 2. The feed tube 18 of

the wall 22 can communicate with a product passageway 24

within a valve 26 when the valve 26 is in an open position

through a product orifice 28. The wall 22 is also provided

with an air orifice 30 which communicates with an annular air

passageway 32. As illustrated in Fig. 1, the annular air

passageway 32 is defined as the space between the inner

surface of outer wall 60 of the valve 26 and the outer surface

of the inner wall 62 of the valve 26 so that it is

concentrically disposed around the portion of the product

passageway 24 which leads to the air swirl passages 34 in an

axial horizontal direction. The valve 26 is rotatably received in the cavity between the walls 22, 36 of the spray

dispenser housing 2.

Tapered portions 38, 40 of a dial 42 define a cavity

therebetween which shall be referred to as a mixing chamber

44. The tapered portions 38, may define a cone. A portion

of the product passageway 24 leads to the mixing chamber 44 in

a generally horizontal direction. The annular air passageway

32 is concentrically disposed around the portion of the

product passageway 24 which leads to the mixing chamber 44 in

a horizontal direction. The tapered portions 38, 40 terminate

before meeting to define a spray orifice 46 of the mixing

chamber 44.

The dial 42 and valve 26 are housed within the cavity

between the valve walls 22, 36 of the housing 2. The dial and

valve are sized so that an extended portion 48 of the dial 42

fits within the valve. A locking tab 50 is formed by the

outer wall 60 of the valve and cooperates with a recess 52 in

the dial 42 so that when the dial is rotated, the valve is

also rotated. A rim 54 on the spray housing restrains the dial 42 and valve 26 from falling out of the valve housing.

The rim 54 is sized so that the dial and the valve may be

assembled by pushing them past the rim. The perimeter 56 of

the dial is grooved to allow easier gripping by a user.

The valve 26 is rotatable about its longitudinal axis

between a heavy spray position and a completely closed

position. An intermediate position provides a light spray.

As shown in Figures 4-7, the valve 26 has an outer wall 60

joined to an inner wall 62 by ribs 64. The outer wall 60 of

the valve has a profiled product control notch 66. The inner

wall 62 of the valve has a profiled air control notch 68.

Upon rotation of the valve 26, the walls 60, 62 of the valve

26 block more or less of the air orifice 30 and product

orifice 28. In the completely closed position, the inner and

outer walls are not notched. Consequently, the product

passageway 24 is completely sealed from feed tube 18, and air

passageway 32 is completely sealed from air orifice 30. As

the valve is rotated, the notches 66, 68 in the valve walls

60, 62 allow communication between the feed tube 18 and the product passageway 28 and between the air orifice 30 and air

passageway 32. Upon further rotation, the product control

notch 66 in the outer wall 60 of the valve 26 reveals more of

the product orifice 28, thereby allowing more communication

between the product passageway 24 and the dip tube 10.

Simultaneously, the air control notch 68 is shaped so that the

inner wall 62 covers more of the air orifice 30, restricting

communication between the interior of the squeeze bottle 6 and

the air passageway 32. Accordingly, the spray will be denser

in this position. When the valve 26 is rotated approximately

midway between the heavy spray position and the fully closed

position, the air and product orifices are at the positions

indicated by the dashed lines in Figure 7, providing a lighter

spray. The notches in the valve walls may be modified to

provide lighter or heavier sprays as the valve is rotated,

depending on the application. The valve may be notched so

that a stream of fluid is dispensed — i.e. product flow

without air flow. The operation of the spray dispensing device of the

invention as used with a squeeze bottle will now be explained

by describing the path of fluid and air. Upon squeezing the

bottle 6 the pressure inside the bottle increases urging fluid

4 up dip tube 10. Fluid is forced through the restricted

conduit 12 and pushes the ball 16 upward off the top of the

conduit 8 thereby opening the ballcheck valve 14. The fluid

is then free to flow into the feed tube 18 toward the product

passageway 24. From the passageway 24 the fluid stream is

injected into the mixing chamber 44 in a horizontal direction

toward the spray orifice 46. It can be seen from FIG. 1 that

the product passageway 24 communicates with the mixing chamber

44 at a location which is directly opposite the spray orifice

46.

Upon squeezing the bottle, the increase in pressure also

forces air above the fluid level in the bottle through the air

orifice 30 into the annular passageway 32. It can be seen

that the distance which must be traveled by the air to reach

the mixing chamber 44 is less than the distance which must be traveled by the liquid so that liquid does not reach the

mixing chamber before the air. In this way, it is made

certain that the fluid is mixed with air before emanating from

the orifice 46.

The annular air passageway 32 leads to the mixing chamber

44 in a horizontal direction and communicates with the mixing

chamber 44 at a location which is directly opposite the

tapered or conical section 38, 40 of the mixing chamber. The

tapered portions 38, 40 direct the annular air stream from the

passageway 32 at an acute to a vertical angle to the central

horizontal stream of liquid from the passageway 24. Thus, the

annular stream of air converges and impinges upon the core

stream of liquid at a point in proximity to the spray orifice

46. The liquid is subjected to considerable turbulence which

breaks it up and intimately mixes it with the air. The result

is that a fine spray is propelled out of the orifice 46 which

exhibits a circular and symmetrical spray pattern wherein the

droplets exhibit a symmetrical particle size distribution. When pressure is released on the container it returns to

its original shape as external air is drawn into the container

through the orifice 46. The drawing of air through the

orifice 46 cleans the orifice and the mixing chamber 44 after

each squeeze cycle thereby inhibiting clogging of the orifice.

This self-cleaning feature of the invention is particularly

advantageous in the case of a viscous product where clogging

is most frequently encountered.

The release of pressure also causes the liquid to drop

down the feed tube 18 which helps the ball 16 to drop, thereby

closing the top of the restricted conduit 12. It will be

appreciated that the closing of the conduit 12 by the ball 16

will trap liquid in the feed tube 18. Thus, during the r^Qxt

squeeze cycle product will already be at a very high level in

the dip tube so that less time will transpire before spay is

emitted. In this way the present invention achieves nearly

instantaneous spraying without the need for a pressurized

container. In the foregoing specification, the invention has been

described with reference to specific exemplary embodiments

thereof. It will, however, be evident that va^'rious

modifications and changes may be made thereunto without

departing from the broader spirit and scope of the invention

as set forth in the appended claims. The specification and

drawings are accordingly to be regarded in an illustrative

rather than a restrictive sense.

Claims (10)

What Is Claimed Is :

1. A squeeze bottle sprayer which is actuated upon squeezing

the bottle to force liquid up a dip tube and emit a liquid-air

spray through a spray orifice, comprising:

a squeezable bottle containing a volume of liquid and air

above the liquid;

a dip tube extending into said volume of liquid;

a sprayer body defining a valve receptacle therein,

having a valve, a tapered section defining a mixing chamber

therein, the tapered section being tapered in a direction

toward a spray orifice which is defined through the valve at a

terminal point of the tapered section; the valve defining a

liquid passageway there through connecting the dip tube with

the mixing chamber in an open position of the valve, at least

a portion of the liquid passageway being disposed in a

direction toward the spray orifice and having a longitudinal

axis aligned through said portion and said spray orifice, the

valve defining a fluid control notch and an air control notch,

the fluid control notch controlling the amount of communication between the dip tube and the product passageway,

the air control notch controlling the amount of communication

between the interior of the bottle and an air passageway, the

valve and the liquid passageway being selectively rotatable

about said longitudinal axis between a closed position wherein

the mixing chamber is disconnected from the dip tube and an

open position wherein the mixing chamber is connected to the

dip tube;

the air passageway, concentrically disposed around said

portion of the liquid passageway, the air passageway

connecting an interior of the bottle containing said volume of

air with the mixing chamber and the air passageway

communicating with the mixing chamber at a location directly

opposite to the tapered section of the sprayer body; wherein

the mixing chamber is disconnected from the interior of the

bottle in a closed portion of the valve and the air control

notch controls the amount of communication between the

interior of the bottle and the air passageway, whereby upon actuation of the squeeze bottle sprayer a

stream of air from the air passageway will be deflected by the

tapered section of the sprayer body to converge and impinge

upon a core stream of liquid from the liquid passageway in the

mixing chamber to atomize the stream of liquid.

2. The squeeze bottle sprayer of claim 1, further comprising

a dial connected to the valve so that they rotate in unison.

3. The squeeze bottle sprayer according to claim 1, wherein

the bottle has a neck with a retaining rim and the sprayer

body is adapted to cooperate with the retaining rim to fasten

the sprayer body to the bottle.

4. The squeeze bottle sprayer according to claim 1 further

comprising a ball-check valve in fluid communication with the

dip tube and the liquid passageway, wherein the ball-check '

valve retains liquid in the dip tube at a level which is higher than a level of liquid in the bottle upon activation of

the container.

5. The squeeze bottle sprayer according to claim 1 wherein

as the valve is rotated from a fully closed position to a

fully open position, the fluid control notch is shaped so that

more communication is allowed between the dip tube and the

product passageway.

6. A dispensing head for a squeeze bottle sprayer

comprising:

a sprayer housing defining a cavity therein, with an air

orifice and a liquid orifice being defined through said

housing;

a valve contained within the cavity, the valve defining

an air passageway, a liquid passageway, a mixing chamber, and

an outlet orifice, the valve being rotatable between an open

position and a closed position, the valve including a notched

portion, the liquid passageway communicating with the mixing chamber and the liquid orifice in the open position of the

spray nozzle, the air passageway communicating with the mixing

chamber and the air orifice in the open position of the spray

nozzle;

wherein the notched portion of the valve controls

the amount of communication between the air orifice and the

air passageway and between the liquid orifice and the liquid

passageway.

7. The dispensing head of claim 6, further comprising means

for retaining liquid in the dip tube at a level which is

higher than a level of liquid in a container upon deactivation

of the container.

8. The dispensing head according to claim 6, wherein the

means for retaining liquid in the dip tube is a ball-check

valve.

9. The dispensing head according to claim- 6, wherein the

notches include a fluid control notch and an air control

notch.

10. The dispensing head according to claim 9, wherein the

fluid control notch is shaped so that it provides more

communication between the liquid orifice and the liquid

passageway when the valve is rotated from a closed position to

a heavier spray position.