DK142132B - Aerosol nebulizer with manually operated atomisers. - Google Patents

Description

(11) PUBLICATION 142132 / «fan i isssf i \ Ra / DENMARK ^ bA '*' JJ '§ (21) Application No 5663/74 (22) filed on 30 October. 1974 (24) Race Day 30 · Oct. 1 974

(44) The application submitted and Q on 1cflO

forwarding the release notice published on ® · SeP · 1J

patent% gEvar ™ Archdiocese 4,1265, us 31 Oct. 1973, 411266, us

Oct 31 1973, 411267, US Oct 31 1973, 411268, US

Nov 29 1973, 419966, US Nov 29 1973, 419967, US

Mar 26 1974, 454917, US

Mar 26 1974, 454918, US

Oct 4 1974, 512321, US

(71) CIBA-GEIGY AG, 4002 Basel, CH.

(72) Inventor: Roger P. Caron, 33 Meadowview Lane, North Andover, Mass., US: Chester Luke, 5 "Pernwood Drive, Bolton, Conn., US: Eduard K. KLyer, 207 EasT 74th Street, New York, NY, US: Herbert H. Loeffler, 53 Spy Pond Lane, Arlington, Mass., US: Pasquale B. Riccio, 54 Pelham Road, Salem, New Hampshire, US: Jean Yves Marand, 7, Residence de 1'Hermitage , 86 Saint Benoit, PR.

(74) Plenipotentiary in the proceedings:

DanBk Patent Kontor ApS.

(54) Aerosol atomizer with manually operated atomisers.

The invention relates to an aerosol atomizer of the kind specified in the preamble of claim 1. In the usual aerosol dispensing cans, it has been normal practice to exert pressure on the liquid in the can by means of a pressurized propellant in the product container and this pressure forces the liquid product through a nozzle to form a shower which is generally somewhat conical, thereby breaking the shower into fine droplets under the influence of the inertia and gravity of the droplets and the evaporation and expansion of small droplets of liquid propellant mixed with the liquid product, or the liquid from the container is sucked into a stream of propellant under pressure through a Venturi nozzle to which the liquid product is applied, after which the mixture of liquid product and gaseous propellant is delivered from the Venturi nozzle as a shower.

In the last ten years, a type of aerosol atomizer has been developed in which the propellant is kept separate from the product to be dispensed, the product and propellant first being mixed upon delivery.

This has made it possible to use aerosol atomizers to deliver products that are not normally compatible with the propellants used when these two materials are stored together for some time. However, in these devices a special propellant is used to dispense and atomize the product.

There has been much discussion about the potential adverse effects of the propellants commonly used in aerosol atomizers such as certain types of "Freon" gas. In cases where the products are not applied to the human body, such as in the case of paints or insecticides, the user may take such precautions that he will not inhale the product / fuel mixture delivered. However, the hair product must be applied to the human body or administered herein, e.g. in the case of odor irons that are sprayed directly onto the body or a breath freshener that is sprayed directly into the mouth, there is no way to prevent the user from being exposed to the damaging effects of the propellant.

This disadvantage of the aerosol atomizers in which liquefied gas is used as a propellant has led to the recent development of appliances in which a portion of hand-compressed air is used to suck product from a product container each time the appliance is activated. Examples of such atomizers are disclosed in U.S. Pat.

3,672.54-5 and 3,735.OIO. Since in these atomizers no special propellant is used, but only compressed air, the propellant (air) used presents no risk to the user. Thus, there are great opportunities to use these nebulizers for such products as medications, cosmetics and personal hygiene products and the like, when it is desired that the user is not exposed to danger from conventional propellants.

i i; in 3 142132

However, it has now been found that it is not possible to achieve a very small droplet size in such an apparatus in which compressed air is used to aspirate the liquid product from a container. While droplet size is not particularly critical when it comes to spraying such products as breath fresheners or odor removers, it is essential for such drugs that, if desired, should be able to be sucked into the airways or lungs of the respiratory organs. For example, medications for treating asthma, it is desirable that the droplet size be as small as a few μ.

The object of the present invention is to provide a one-hand operated aerosol atomizer which operates at relatively low propellant pressures and which delivers accurately metered amounts of liquid in a very fine atomization. Furthermore, the force exertion required to compress the required air must be low so that the nebulizer is easy to handle for the user.

This is achieved with an aeroeol atomizer according to the invention, characterized by the characterizing part of claim 1.

In this embodiment, an atomization of an accurately metered dose is achieved simply by pressing the two ends of the atomizer towards each other, and this atomization occurs only when sufficient pressure is built up in the propellant pump. By ensuring that the liquid is released under a greater pressure than that prevailing in the propellant, the danger of the propellant in the nozzle eliminating the liquid destined for the atomization is eliminated. Furthermore, the aerosol atomizer according to the invention can be manufactured with only a few moving parts, so that it becomes reliable in use and can be manufactured inexpensively. Finally, the placement of the liquid container and propellant pump at each end of the atomizer will allow the liquid container to be replaced with a new one when emptied, so that it is not necessary to discard the entire atomizer.

A visibly fine shower is obtained if the pressure control means of the invention are set to supply liquid product through the product flow path under a pressure which is between about 0.3 and 1 bar higher than the pressure in the propellant supplied through the nozzle flow path.

142132 4

Preferably, the pressure regulating means according to the invention may be dimensioned such that nozzle is supplied with liquid through the liquid flow path under a pressure which is between 2 and 8 bar higher than the pressure in the environment, and propellant through the propellant flow path under a pressure which is between 1.7 and 7 bar higher than the pressure in the surroundings »

Hereby a solution to the problem of "spitting" has been obtained, i.e., the nebuliser immediately releases, by operation, one of fine droplets composed of nebulizer cloud without first ejecting larger droplets, just as the nozzle is blown clean of liquid product without drip of liquid after the cessation of compressed air flow.

A preferred embodiment of the aerosol atomizer according to the invention is given in claim 4, in which simple control of the flow paths for both compressed air and liquid product is obtained and wherein the liquid pump is only activated when the pressure necessary for the atomization pump is built up. This avoids premature delivery of fluid to the nebulizer nozzle.

The release of the locking means in the propellant pump may conveniently be effected by designing the aerosol atomizer according to the invention in the manner set out in claim 5.

The actuation of the liquid pressure pump upon release of the valve in the propellant pump can be achieved simply by forming the liquid pressure piston as claimed in claim 6.

A particular embodiment of the aerosol atomizer according to the invention is set out in claim 9. In this embodiment, the liquid pressure pump is activated simultaneously with the air pressure pump, but the valve in the liquid flow path first opens simultaneously with the valve in the fuel flow path. Thereby considerable pressure can be obtained in the liquid before its release.

The embodiment according to claim 11, on the other hand, is intended for inferior fluid pressure because the piston ring is made elastically collapsible.

In the embodiment of claim 12, unlike the previously mentioned embodiments, the cylinder of the liquid pressure pump is movable while the piston is firmly connected to the main body of the atomizer.

142132 5

A particularly simple embodiment of the aerosol atomizer according to the invention is given in claim 14. It consists of parts which can be easily molded in plastic, as well as parts such as springs and sealing rings which are common commodities.

This embodiment can be further expanded as set forth in claims 15, 16 and 17, thereby obtaining, among other things, the added benefit of closing the fluid flow path one before the compressed air flow has ceased so that the nozzle is blown clean of liquid product which would otherwise dry out upon drying. could clog the nozzle.

The invention will be explained in greater detail in the following by some exemplary embodiments with reference to the drawing, in which fig. 1 shows a longitudinal section through a nozzle, namely a conventional one

Yenturi nozzle used in the aerosol atomizer according to the invention, fig. 2-4 are a first embodiment of the aerosol atomizer in longitudinal section in the non-delivering and dispensing position as well as in a smaller scale perspective; 5 and 6 show another embodiment of the aerosol atomizer in longitudinal section and with the parts in the non-dispensing and dispensing position respectively. 7 and 8 show a third embodiment of the aerosol atomizer in the same manner as in FIG. 5 and 6, FIG. Fig. 9 is a vertical sectional view of a modified embodiment of the nozzle unit; 10 and 11 show a fourth embodiment of the aerosol atomizer in the same manner as in FIG. 5 and 6, FIG. 12 is a vertical sectional view of an altered stone or electric cylinder unit of the embodiment shown in FIG. 10 and 11, FIG. 13 is a side view of another embodiment of the aerosol atomizer according to the invention; FIG. 14 is a longitudinal section on a larger scale of the embodiment shown in FIG. 13 with the parts in the resting position, FIG. 15 is a partial longitudinal sectional view through a portion of the part shown in FIG. 14, also with the parts in the resting position; FIG. 16 is a view of FIG. 15, but with the parts in the positions which they occupy during the discharge of liquid and compressed air; FIG. 17 is a view of FIG. Fig. 15 is a sectional view, but with the parts in the positions which they occupy after the liquid flow has "stopped" while the compressed air is still flowing; and Fig. 18 is a section similar to Fig. 15 but with the parts in the positions. which they ingest after the valve stem has started its progressive movement.

The configuration of the embodiment shown in FIG. 1 is well known in the art, e.g. from U.S. Patent Nos. 3-389-837 »3-4-51,596, 3,581,952 and others. It comprises a central longitudinal Yenturi channel 33, which - in the flow direction - consists of a converging portion 33a, a narrow neck portion 33b and a wide neck portion 33c. The neck portions 33b and 33c are of constant diameter. At the lower end of the vent, Venturi channel 33 comprises a divergent expansion portion 33i Just upstream of the expansion portion 33d, two diametrically opposite transverse inlet channels 7a and 7b extending transversely of a Yenturi channel 33 extending transversely into the wide neck portion 33c annular supply chamber 14.

In the embodiment shown, the nozzle 3a is arranged in a recess 14a in a nozzle carrier 20, the recess 14a having a larger diameter portion to accommodate the thicker downstream portion of the nozzle. The larger diameter portion of the recess 14a is deeper than the length of the thick downstream end of the nozzle 3 so that the annular supply chamber 14 remains around the thinner portion of the nozzle. A propellant duct 9a through the nozzle carrier 20 opens into the annular supply chamber 14. The propellant duct 9a is connected to a propellant gas source which does not deliver gas under pressure to the chamber 14, and a source of pressurized liquid, which is also not shown, is connected to the nozzle carrier 20 at the inlet end. 33e in the converging portion 33a of the Venturi channel 33 for supply of liquid to the nozzle.

In use, this nozzle unit operates by pressurizing the liquid to be dispensed to the converging portion 33a of Venturi duct 33 and flowing through the narrow, wide neck portions 33b and 33c, respectively. Pressurized gas is passed through the propellant 9a to the annular supply chamber 14 and thence through the inlet ducts 7a and 7b and at no. Of the flow of liquid flowing through the Venturi duct 33 * The gas and liquid are mixed and delivered as a much finer shower. of liquid droplets in the gas than if the supplies of gas and liquid are exchanged as in the prior art nozzle units.

For liquids having a viscosity of the same magnitude as the viscosity of water, and when the diameter of the longitudinal channel is in the range between approx. 0.05 and approx. 0.5 mm, and the diameter of the transverse inlet ducts in the range between approx. 0.1 and approx. 1.5 mm, it was found that liquid pressure between approx. 2 and 8 bar pressure gauge (ato) and air pressure between approx. 1.5 and 8 bar pressure gauge (ato) produced very good results. Very fine droplets of liquid appeared in the mixture of gas and liquid shower coming out of the divergent outlet end. Better results were obtained if the fluid pressure was maintained approx. 0.5-1 bar higher than the gas pressure. Particularly good results were obtained with diameters on the longitudinal nozzle channel of between 0.08 and 0.12 mm and diameters on the transverse inlet ducts of approx. 0.15-0.25 mm and with a liquid pressure approx. 1 bar higher than the air pressure. With a diameter of the longitudinal channel of 0.08 mm, a diameter of the transverse channels of approx. 0.6 mm and a liquid pressure of approx. 4.5 bar pressure gauge was a major part of the small droplets in the shower 5 μ in diameter and smaller when air and liquid were applied to the nozzle shock. While the smallest droplets were approx. 5 µ in diameter, the average size was between 10 and 12 µ, with the largest drops measuring approx. 30 µ.

It was quite unexpected that the formation of uniform fine droplets should occur when the pressure in the propellant gas in the nozzle is lower than the pressure in the liquid product.

This fact makes the new proficiency especially interesting for use in delivering medications to be inhaled into a patient's lungs, such as the medicines for asthma or respiratory disorders.

In contrast, with continuous supply of air and liquid with an air pressure of 4.5 bar gauge pressure and a liquid pressure of 3.5 "bar gauge pressure, where the air was conducted through the Venturi duct and the liquid entered the air stream, the smallest droplets of 3 4 µm, the average ΤΛ2132 8 drops about 75 µm and the largest about 200 µm. Similar results were obtained at other pressure values within the above ranges.

The foregoing description of the results obtained with different channel sizes and different values of liquid and gas pressure is limited to specific ranges, but the invention can also be used with liquids whose viscosity is not close to water viscosity, and with other duct sizes and other values of fluid and gas pressure. In particular, the invention can be used at lower liquid and gas pressures, as is the case in conventional aerosol containers in which gas is supplied to the liquid to be atomized at pressures lower than those mentioned above. Also, the invention can be applied to nebulizers of the kind disclosed in the aforementioned patents, and of a similar kind, simply by exchanging the supply of liquid and gas to the nozzles of such nebulizers and providing means of some kind for the liquid under pressure in its container.

The embodiment of an aerosol atomizer shown in FIG. 2-4, comprises a nozzle carrier or center portion 20, at one end of which is disposed a product container 21 for the liquid product. The intention that the product container 21 is placed here on one end of the middle part 20 will be explained in more detail below. The product container 21 comprises a container cap 22 with an orifice 22a, in which is attached a container closure member 23 with a product outlet 23a formed therein. In this embodiment, between the mouth of the container 22a and the closure member 23 is fluid tightly clamped a flexible bag 24, which is intended to contain the product destined for atomization, and which projects into the container 22. In the wall of the container 22, an air hole 22b is formed. so that when liquid-formed product is dispensed from the bag 24, air can enter through the air hole 22b in the container 21. In this way, the formation of negative pressure is prevented in the product container 21. If a bag 24 or an equivalent container is not used, the product container 21 should be used. be equipped with appropriate means for preventing suppression, such as e.g. a pressure relief valve.

A cylinder 26 for an air pressure pump 25 is also mounted on the center part 20. In this embodiment, the pump is arranged on the end of the middle part 20 facing away from the product container 21, so that a pressure exerted on the piston 27 of the pump 25 is applied to compress air. The cylinder 26 of the pump 25 is integrally formed with the center portion 20 and a cylinder bore 26a in which the piston 27 can slip is formed in the cylinder. A bullet socket bush 28 on the outer end of the piston 27 extends along the outer wall of the cylinder 26 with a sliding fit so that it can guide the piston 26 in its movements inside the cylinder 26. The guide sleeve 28 further has a slot 28a next to the nozzle 3, to be further described. in the following, so that the nozzle 3 can never be covered by the bushing 28. Between the bottom of a recess 28b between the piston 27 and the piston guide bushing 28 and the bottom of a ring groove 26b in the cylinder 26, a piston return spring 29 is secured which seeks to move piston 27 outwardly in cylinder 26. On the inner end face of piston 27, a temple seal 27a is provided with a sealing lip 27b extending radially outwardly and axially into cylinder 26. so that it moves in fixed abutment along the wall of the cylinder bore 26a1 so as to render the interior of the cylinder close during the compression stroke of the piston, the sealing lip during the outward movement of the piston 27 being able to move freely away from the cylinder wall so that air entering through an air hole 25a, can pass past the piston 27 and the seal 27a and relieve the negative pressure which would otherwise occur in the cylinder during the outward movement of the piston.

The parts could also be arranged in a reverse manner, i.e. a fixed piston could be mounted on the center part 20 and the cylinder could be a sleeve which could slide on the solid piston.

Upwardly from the inner end of the piston 27 extends an activation pin 30 which, when the piston 27 is in the innermost position of the cylinder 26, extends into a compressed air air outlet 31 formed in the middle portion 20. The air outlet 31 opens into a axial cylinder bore 32 which is coaxial with cylinder 26 in center portion 20.

A valve body 15 for controlling the flow of compressed air is arranged in the cylinder bore 32 over the air outlet 31 to close it in the non-discharging state. When the piston 27 reaches its innermost position in the cylinder 26, the pin JO lifts the valve body 15 from its valve seat 15a around the mouth of the air outlet 31, so that compressed air can flow into the cylinder bore 32. It will be appreciated that the pin 30 also may be disposed on the valve body 15 and extend downwardly through the air outlet 31 and down into the cylinder 26 so that it can be actuated by the end face of the piston 27 when the piston is in its innermost position in the cylinder 62. Thus, the actuating pin 30 must be arranged to cooperate thus with the piston 27 and the valve body 15 opening the air control valve as the piston 27 approaches its innermost position in the cylinder 26.

Offset from the axial bore 32, it extends as a bellows with 3 nozzle assembly designated substantially in the same manner as the one shown in FIG. 1, comprising a bale bore 15b of constant cross-section extending radially from the axial bore 32, and a divergent 4 expansion portion 16 extending from the transition from the bale bore 15b to the circumference of the center portion 20.

Inside the axial cylinder bore 32 in the middle portion 20 a liquid pressure piston 34 is slidably mounted to pressurize the product, which piston 34 is surrounded by a piston ring 35) which seals against the wall of the cylinder bore 32. The fluid pressure plunger 34 bears an extension 36 which extends downward from the plunger and engages with the valve body 15 to control the air flow. In the embodiment shown, the end surface of the extension 36 bore a recess 37) in which the valve body 15 is fixedly mounted. The extension 36 is smaller in diameter than the bore 32, so that a space is formed around the extension 36 which forms part of the propellant flow path and connects from the air outlet 31 past the valve body 15 to the nozzle 3 · 1 of the embodiment illustrated in the sidewall of the extension 36. 38, the non-recessed portions between the grooves serving as the guide for the extension 36 during its sliding movement in the bore 32. The fluid pressure piston 34 also has a center bore 39 for pressurized product, which bore extends through the piston from its end surface 34a, which faces the product container 21, for a channel 39a which opens radially into an outwardly divergent ring groove 40 and valve means are provided for closing the product bore 39 in the non-releasing states, the valve means being constituted by a sealing ring 41 which abuts against the bottom of the ringnote 40.

142132 11

The channel 39a, which opens radially in the ring groove 40, aligns axially with the neck bore 15b, and the piston 34 is secured against coming out of bending by a small guide projection 42 on the side of the cylinder bore 32 facing away from the nozzle 3, which guide projection 42 interacts with one of the notes 38-

Above the plunger 34, a plunger return spring 43 is arranged in the cylinder bore 32. The spring 43 is strong enough to hold the valve body 15 in contact with its red against the air pressure built up in the cylinder 26 until the valve body 15 is opened by the actuating pin 30. Ted at the upper end, the spring 43 pushes against a perforated check valve stop 44 which locks a check valve ball 45 into a recess in a check valve housing 46 which is accommodated in a recess 23b in the container closing means 23. From the check valve housing 46 extends through a gasket 47 between the valve housing and recess 23b is a product nipple 48 through which a product outlet channel 48a is formed.

The product container 21 is held in position on the middle part 20 by means of a socket 20a formed on the middle part, which is tightly enclosed in the recess 23b of the container 23.

An empty product container 21 can be replaced by removing it from the nipple 48, and then a filled product container is placed on the nipple 48, which permeates the product outlet 23a.

If the parts are in the position shown in FIG. 2, liquid product from the product container 21 will have flowed past the counter ball 45 and have fulfilled a product pressure space 32a in the cylinder bore 32 above the liquid piston 34. However, the piston ring 35 and the sealing ring 41 in the ring groove 40 prevent the product from flowing out of the product space. 32a.

The aerosol atomizer is held between the thumb and forefinger of a hand, and the product container 21 and the air pump piston 27 are actuated towards each other by the same squeeze. In the cylinder 26, an air pressure is built up until the actuating pin 30 opens the valve body 15 for controlling the compressed air. At this moment, the compressed air is suddenly released from the cylinder 26 and flows through the air outlet 31 and 12 U 2132 the groove 38 of the extension 36 to the nozzle 3 · At the same time as the actuating pin 30 lifts the valve body 15, it presses the extension 36 upwardly and "moves the fluid pressure plunger 34 In this way, the liquid product is pressurized in the product pressure space 32a and this pressure propagates through the center bore 39 to the sealing ring 41, which thereby extends and allows the product under pressure to pass to the nozzle 3. In this way, the pressurized product and the compressed air will be mixed right at the entrance to the neck bore 15b and dispensed as a mixture of fine liquid droplets in compressed air from the divergent expansion portion 16.

For each actuation of the apparatus as described above, only a small amount of liquid product will be released, as soon as sufficient liquid product has flowed out of the product pressure space 32a between the closed valve ball 45 and the piston end surface 34a, the pressure of the liquid product will decrease. when the plunger 27 has reached its maximum compressive position, regardless of whether or not the finger continues to press against the plunger 27. When the fluid pressure has dropped sufficiently, the sealing ring 41 closes to prevent further flow of liquid product. Although the compressed air is not yet used up, no more product will flow out, only compressed air will flow out until the air pressure in the cylinder 26 and the air outlet is sufficiently low for the spring 43 to move the fluid pressure piston 34 down and thereby move. the valve body 15 to the closing position. In this way, a reduced pressure is created in the product pressure chamber 32a, so that the counterclockwise ball 45 opens and allows the product to flow out of the product container 21.

Thus, there has been disclosed an embodiment of an aerosol atomizer in which, for dispensing the product, only compressed air is used, but also in which the product itself is pressurized to mix it with the compressed air. This makes it possible to atomize the liquid into droplets that are smaller than what can be obtained in an apparatus in which the compressed air is used to extract the product from a product store. However, the aerosol nebulizer is designed in such a way that for each activation only a small dose is dispensed, so that the nebulizer can be safely used to deliver drugs at predetermined doses, and the user can receive no more than the prescribed dose without to activate the device several times. The sizes of the nozzle bores, ducts, pistons and cylinders as well as the elasticity of the springs and sealing rings can be dimensioned to achieve the desired droplet size and to ensure that the air is in flow before the product is released and after the product flow is closed so that the nozzle gets blown clean for product residue.

The embodiment described above can be varied in several different ways, and some of the smashed designs will be described in connection with the further embodiments. In the following description, only those parts of the additional embodiments which differ from the corresponding parts in the above-mentioned embodiment, as well as the resulting differences in the working method, will be discussed.

The aerosol atomizer according to the invention can be changed by allowing the product bore 39 in the fluid pressure piston 34 · to open on both sides of the piston 34 · in the ring note 40. The pressurized product will then be introduced into a partial air flow through the transverse bore connecting the two emerged openings and a shower with slightly larger drops will be produced.

An altered embodiment of the dispensing apparatus according to the invention is shown in FIG. 5 and 6. The nozzle 50 comprises the narrow neck bore 55 and the divergent expansion portion 56, both of which are formed in a nozzle insert 53 »which is snugly fitted into a side recess 52 in the middle portion of the aerosol atomizer 20. Between the inner end of the nozzle insert 53 and the side recess. 52's innermost end, an annular space 51 is defined which forms part of the lateral flow path of the compressed air, i.e. radially in relation to the length of the nebulizer axis, into the nozzle bore 55 of the nozzle 50 · Through the middle portion 20 and towards the side of the recess 52 facing the air pressure pump 25, a compressed air duct 54 extends, the opposite end of which opens into an air duct 32b, forming part of it. the cylinder bore 32 in the middle portion 20, the other portion of the cylinder bore constituting the product pressure space 32a. The air duct 32 contains the valve body 15 which is attached to a valve member 18. In the middle part 20 a valve seat member 15c is arranged to cooperate with the valve body 15.

14 162132

The valve member 18 comprises a smaller diameter spindle portion 18a extending upwardly through a narrow connecting bore 32c between the product pressure space 32a and air duct 32a of the center portion 20 formed in the center portion 20, and in said product pressure space a fluid pressure piston 46 is pressurized. . Firmly mounted in the underside of a spindle 19 facing the air pressure pump is a valve body 57 which abuts the upper end of the center portion connecting bore 32c in the non-dispensing state. In the lateral wall of the spindle 19, grooves 19a are formed. The return spring 43 pushes the spindle 19 and valve body 57 downwardly against the air pressure pump, and in the same way as in the embodiment shown in Figures 2-4, the spring must be strong enough to hold both valve body 57 and valve body 15 in contact with their respective valve seats against the pressure of the compressed air in the cylinder 26. An axial groove 32d extends into the wall of the narrow connecting bore 32c to the inlet orifice of a radial product channel 58 which extends to and opens in the middle of the annular space 51 of the nozzle insert 53. The grooves 19a, the axial groove 32d and the product channel 58 together form a product flow path which is controlled by valve body 57. The check valve housing 46 is extended downwardly and acts as a fluid pressure plunger at the upper end of product pressure space 32a, in which it is retained by a locking ring 46a and sealed by a seal 46b.

The mode of operation of this embodiment differs from the mode of operation of the first embodiment partly in the way in which the flow of product under pressure is valve controlled, and in the way in which air and product flow through the nozzle means. When the valve body 15 is lifted by means of the actuating pin 30, the compressed air will flow through the air outlet 31, the axial grooves 18b of the valve member 18 and the compressed air duct 54 into the annular space 51. At the same time as the valve body 15 is lifted, the valve body 57 will move upwards due to upward movement of the valve stem part 18a *. Thereby, a forced opening of the flow path for the product under pressure occurs, which can now flow through the grooves 19a and 32d and the radial product channel 58 to the nozzle 50. It can be seen that the flow of the product is more or less linear through the nozzle as the air is introduced into the mainly across the product stream. At the same time, the fluid pressure piston 46 is pressed against the action of the spring 43 so that the product is pressurized in the product pressure space 32a. Incidentally, this apparatus operates in the same manner as the embodiment shown in FIGS.

in

V

ί 142132 15

The embodiment shown in Figs. 7 and 8 differs from that of Figs.

2-4 show that a differently shaped nozzle 60 similar to that shown in Figs. 5 and 6 is used, and that the valve control of the product flow path is somewhat different. The nozzle 60 comprises a neck bore 65 and the divergent expansion portion 66 formed in a nozzle insert 63 which is snugly fitted into a side recess 62 in the middle portion of the aerosol atomizer 20. Between the inner end of the nozzle insert 63 and the inner end of the side recess 62 annular space 61 which forms part of the compressed air flow path leading to the throat bore 65. Through the center portion 20 of the aerosol atomizer extends from the bottom of the recess 62 a compressed air duct 64 which opens into the lower portion 32e of the cylinder portion 20 formed in the middle portion 20. the lower part 32e, the valve body 15 is mounted, being mounted in the lower part 69 of the fluid pressure piston 67.

In the lower part 69, grooves 69a are provided which allow the air to pass from the air outlet 31 to the compressed air duct 64.

The fluid pressure piston 67 is relatively loosely mounted in the lower portion 32e of the cylinder bore 32 to form a clearance space 59, and the piston has a piston ring 68 for sealing the piston against the lower bore portion 32e while carrying a resilient sealing ring 70 near the upper end. reverse TV shaped cross section. This sealing ring 70 is so designed and arranged that when the liquid pressure above the sealing ring 70 in the clearance space 59 between the piston 67 and the wall of the bore member 32e has increased to a certain value, the sealing ring 70 will yield and allow the liquid to pass. In the bore portion 32e, a lateral channel 71 extends to the bottom of the nozzle insert recess 62. The check valve housing 46 extends downward and downwardly into the upper end 32a (product pressure space) of the cylinder bore 32 of the apparatus and a fluid key is secured therein.

The operation of this embodiment differs from the operation of the embodiment shown in Figs. 5 and 6 only in that the product under pressure is controlled in a different way. As the valve body 15 is lifted by the actuating pin 30, the compressed air will flow through the air outlet 31, the grooves 69, the compressed air duct 64 and the cup-shaped space 61. As the valve body 15 is lifted, the liquid pressure piston 67 moves upwardly against the force of the spring 43 and sets the product present. formed in the product pressure space 32a, which forms part of the bore 32, under pressure. Pressure fluid through the clearance space 59 between the piston 67 and the lower bore portion 32e presses the sealing ring 70 which gives inwardly, thereby pushing the product out through the lateral channel 71 to the nozzle 60. The sealing ring 70 acts as a valve in the product flow path constituted by the clearance space. 59 and the side channel 71.

In the embodiments described so far, the compressed air and the product have been supplied simultaneously to a space just in front of the nozzle's narrow neck bore, or the air has been introduced substantially transversely into a product stream in the nozzle. However, it is possible to bring them together in other ways.

As will be seen in Fig. 9, the compressed air and the pressurized product need not be mixed until they have been discharged from the nozzle member. In the nozzle insert 80, only a divergent expansion portion 81. The centered fluid channel 82 extends from the center bore 83 formed in the device portion. Between the nozzle insert 80 and the bottom of the nozzle insert 85, an annular space 84 is formed, and from this space 84 extends. Note 102a to the centered fluid channel 82. Compressed air bore 86 connects the center bore 83 of the annular portion 84 to the annular space 84 at the bottom of the socket 85. In this embodiment, the pressurized product is substantially axially discharged through the expansion portion 81 and the compressed air is passed into a substantially perpendicular to the path, and the two components are mixed in the divergent expansion portion 81.

In all embodiments so far described, the product has been pressurized by means of a piston which is moved in the bore formed in the center part of the apparatus, which serves as a cylinder, by means of the actuating pin on the air pump piston. However, the product can be pressurized by an inverted device of the parts in question, i.e. using a fixed piston and a movable cylinder. Such a device is shown in Figs. 10 and 11, in which the body part of the aerosol atomizer comprises a movable cylinder which forms part of a piston cylinder organ to pressurize the liquid product.

In the embodiment shown in Figs. 10 and 11, in the body part 120 of the aerosol atomizer, an outer cylinder bore 132 is formed in which a cylinder consisting of two parts is slidably mounted. The outer cylinder portion 147a comprises the nozzle 90 with the narrow neck bore 91 and the divergent expansion portion 92 projecting laterally from this cylinder portion. In it, an inner cylinder bore 147c is formed in which the neck bore 81 opens. The outer cylinder portion 147a is slidably mounted in the outer cylinder bore 132 and sealed therein by a gasket 151. Attached within the outer cylinder portion 147a by means of a pin 148 is an inner cylinder portion 147b, in which is formed an upwardly open cylinder chamber 147D. Around the outside of the inner cylinder portion 147b and disposed adjacent to the throat bore 91 is a divergent ring groove 142, in which opens a pressurized liquid bore 141 extending from the cylinder chamber 147d into the internal cylinder portion 147b of the fluid pressure pump. The pressurized fluid bore 141 is closed outwardly by a sealing ring 143.

A lower cylinder portion 139 extends downwardly and at its bottom 139a the valve body 15 is mounted. Along with the inner cylinder bore 147c, an axial groove 140 extends from the bottom of the outer cylinder portion 147a to the neck bore 91. A fluid pressure piston 137, which in the illustrated embodiment is integrally formed with the container closure member 23, extends into the cylinder chamber 147d and is sealed against this by means of a gasket 138. Through the fluid pressure plunger 137 a liquid supply duct 137a extends from the check valve housing 46 to the lower end of the fluid pressure plunger 137 *. A return spring 144 is disposed between the upper end of the outer cylinder portion 147a and the container closure member 23.

When in use, the actuating pin 30 lifts the valve body 15, the compressed air flows past the valve body 15 and along with the axial groove 140 to the nozzle 90. At the same time, the cylinder consisting of the outer and inner cylinder part 147a and 147b, respectively, held together by the pin 148, slides upwardly sliding into outer cylinder bore 132. As the fluid pressure piston 137 is fixed because the container closure member 23 is fixed relative to the upper end of the body portion 120, this cylinder 147a, b moves upwardly outside of the fluid pressure piston 137 so that the liquid product in the cylinder chamber 147d is pressurized. The pressurized product now forces the sealing ring 143 away from its bed so that the liquid product is allowed to mix with the compressed air at the entrance to the neck bore 91.

142132 18

The change shown in Figure 12 differs from that shown in Figure 10 in that the neck bore 91 and the divergent expansion portion 92 are formed in the body portion of the apparatus rather than in the cylinder 147a, b, so that a non-assembled cylinder member 177 can be used. The design and operation are otherwise the same as in Figs. 10 and 11.

Reference is now made to Figs. 13-18, which show a further preferred embodiment of an aerosol atomizer according to the invention, which apparatus as a whole consists of a body part 310 with at one end a liquid pressure pump 311 to pressurize the product and with an air pressure pump 312. at the second part of the body part. A central bore 313 extends through the body portion 310, the end of which faces the fluid pressure pump 311 consisting of an outwardly divergent cone portion 314.

The fluid pressure pump 311 comprises a plunger 315 which in this embodiment carries a tapered shaft 315a which is firmly but removably inserted into the cone portion 314 of the center bore 313 and in which a through-flow channel 316 is formed. As the piston 315 is secured to the shaft 315a, it is firmly connected to the body part 310 of the apparatus and thus constitutes the fixed part of the liquid pressure pump 311. A movable part of this pump 311 is constituted by a cylinder 317 which is inserted on the piston 315, the two parts being sealed to each other by means of a ring gasket 318 which is enclosed in a circular groove on the piston 315. When the space between the piston 315 and the cylinder 317 is filled with liquid, exerting force on the end of the cylinder 317 towards the body portion 310 causes the liquid to be pressurized.

It will of course be appreciated that the cylinder and piston can be interchanged, i.e. the cylinder may have the shaft 315a attached to its closed end and the piston movably mounted within the cylinder thus constituting the movable portion. A diaphragm 319 is disposed over the end of the liquid channel 316, thereby sealing the fluid pressure pump 311 until the apparatus is first actuated, whereby the diaphragm 319 is pierced by a means to be described hereinafter. In this way, it is possible to provide sealed product pressure units as replaceable replacement parts for units that have been emptied of product by simply pulling the unit out of the center portion 313 of the cone portion 314. The diaphragm 319 prevents loss of product until the unit is properly positioned on the body part 310 and the apparatus is activated.

At the other end of the aerosol atomizer body portion 310, an air pressure pump is formed which in this embodiment comprises an air cylinder 320 integrally integral with the body portion 310 to form the fixed portion of the air pressure pump. The movable portion of the air pressure pump is constituted by a piston 321 slidably mounted in the cylinder 320, in whose circumferential profile ring groove 322 is provided with two depths, a sealing ring 323 which is a seal for the space between piston 321 and the air cylinder 320. The deepest part of the profile ring groove 322 is located so that as the piston 321 moves toward the body portion 310 in a compression stroke, the sealing ring is forced into the less-deep portion of the groove to close the space between the piston 321 and the cylinder 320. However, as the piston 321 moves away from the body portion 310, the sealing ring 323 will be moved to the deep side of the profile ring groove 322 so that said space is no longer tightly closed and air can enter and relieve the vacuum. Outside of the sealing ring 323, the piston 321 is formed with a flange 325 which cooperates with the inner stop 324 of the inside of the cylinder 320 to prevent the piston from being pulled completely out of the cylinder. Between the inner end of the plunger 321 and the bottom of the cylinder 320, a plunger return spring 326 is placed which returns the plunger 321 after the compression stroke.

The body part 310 of the aerosol atomizer is provided with a nozzle, designated as a whole 327, which consists of a nozzle insert 328 which fits into a socket 329 in the body part 310 so that an annular space 333 is formed around the insert. Through the nozzle insert 328, a venturi duct 330 extends into which side feed ducts 330a open from the annular space 333. At one end of the center bore 313, a fluid duct 331 extends to the socket 329 so that it communicates with the venturi duct 330 and a compressed air duct 332 extends from the closest air vent. the end of the bore 313 and to the annular space 333, thus serving as supply chambers for conveying compressed air to the lateral supply channels 330a. Although the device shown implies that the air is fed from the side into the liquid stream, it is of course possible to allow the two media to swap space.

An air valve is provided in the center bore 313. A valve stem 334 is mounted reciprocally in the center bore 1421 and bears at its end closest to the air pressure point 312 an air valve support flange 335 against which is sealing ring 336 which closes the center bore 313 between the air pressure pump 312 and the pressure bore 312. the air duct 332 and thus constitutes an air valve.

A fluid flow control valve 339 is also disposed in the center bore 313 and is constituted by a valve member 337 disposed on the rod 334 between the inlet of the fluid passage 331 in the center bore 313 and the fluid pressure pump 311 as well as a valve seat 338 formed on the center bore 313. surface. The liquid valve 339 further has a sealing ring 339a between the valve member 337 and the end of the liquid channel 331, which ring is held in place by a holding flange 340. Between the valve member 337 and the end of the tapered shaft 315a is provided a return spring 341 which seeks to move the valve member 337 towards the valve seat. 338 and the valve stem 334 towards the air pressure pump 312. A tapered piercing means 342 in the form of a tapered pin is disposed on the valve member 337 and is directed to the diaphragm 319.

At the end of the valve stem 334 is provided an actuating pin 343 which extends into the cylinder 320 so that it can be actuated by the piston 321 as it approaches the end of the compression stroke. Of course, although the actuating pin 343 is shown attached to the valve stem 334, it can of course be applied to the piston 321 with the same effect. The advantage of the device shown is that the end of the valve stem 334 which is located close to the actuating pin 343 acts as a holding means for holding the air valve sealing ring 336 in abutment against the holding flange 335. Thus, what is actually required of the actuating pin 343 is merely that it cooperates with the the moving part of the air pump - here the piston 321 - and the valve stem 334 in such a way that the valve stem is forced forcibly as the moving part of the air pressure pump approaches the end of the compression stroke.

In the center bore 313 there is also provided a dead-end valve member in the form of a sliding sleeve 344 which is disposed between the air valve holding flange 335 and the holding flange 340 which holds the sealing ring 339a against the valve member 337. The sliding sleeve 344 is shorter than the distance between the two holding flanges 335 and 340, and thus can, to a limited extent, slide freely with respect to the valve stem 142132 21 334 along the center bore 313. The sliding sleeve 344 generally engages fluid tightly with the center bore 313. In the resting position shown in FIG. 14, the sliding sleeve 344 abuts against the holding flange 340 and closes neither the compressed air duct 332 or the liquid duct 331. At its outer limit of motion closest to the liquid pressure pump 311 it closes, as shown in Fig. 17, the liquid duct 331.

During use, and beginning with the liquid 31 of the fluid pressure pump 311 being filled with liquid and the parts being in the resting positions shown in Fig. 14, force is exerted on the cylinder 317 towards the body portion 310 and on the piston 321 of the air pressure pump 311 towards the body portion 310. These forces can be exerted by the user holding the device between the thumb and forefinger on the same hand. As the piston 321 approaches the end of the compression stroke, it comes into contact with the actuating pin 343 and moves the valve stem 334 along the center bore 313. In the first part of this movement, the parts will take up those of FIG. 16, and at this stage the piercing means 342 would have penetrated the membrane 319, if this had not already been done by a previous activation of the apparatus. The air valve sealing ring 336 has now moved past the mouth of the compressed air duct 332 so that compressed air can flow from the air cylinder 320 to the compressed air duct 332 and thence to the annular space 333 and the nozzle insert 328. In addition, the valve member 337 has been moved away from the engagement with the valve seat 338 and has been moved past the valve seat 338 to open the liquid channel 331 for fluid flow from the pressurized liquid product in the cylinder 317 through the liquid channel 316 and the cone portion 314 of the middle bore 313. Thus, liquid product is released in the form of fine droplets in compressed air through the nozzle insert 325. has come into contact with the slide bush 344, but has only moved it a short distance. Further movement of the piston 321, the actuating pin 343 and the valve stem 334 causes the parts to move to the positions shown in Fig. 17, in which the compressed air duct 332 remains open for flow of compressed air and the valve member 337 remains out of engagement with the valve seed 338. but now the slide sleeve 344 has covered the mouth of the liquid channel 331. In this way, the compressed air will continue to flow through the nozzle insert, but the liquid flow is stopped by the sliding sleeve 344. In this way the nozzle insert is blown clean for liquid product.

142132 22

During the first movement of the reciprocating stem 334, the sealing ring 339a of the fluid valve 339a first comes into contact with the valve seat 338 and the wall of the center bore 313, thereby closing the flow path of the fluid and the parts occupying the positions shown in FIG.18, in which the holding flange 340 has just reached the guide bushing 344 Thereafter, further movement of the valve stem 334 will cause the guide sleeve 344 to return to its initial position in which it releases the fluid channel 331. However, only the small amount of fluid trapped between the sealing ring 339a and the slide sleeve 344 will flow into the fluid channel 331. as the flow path is blocked by the sealing ring 339a. The parts continue in their movements until they occupy the positions shown in Figs. 14 and 15, in which aerosol atomization is ready for the next duty cycle.

It will be appreciated that the deadlock movement of the sliding sleeve 344 causes the fluid flow to be interrupted as the valve stem 334 approaches the termination of its opening movement and the compressed air continues to flow so that the nozzle members are blown clean of the product. Thereafter, the slide bush 344 remains in the same position in the beginning portion of the backward movement and does not move until the fluid stem fluid valve member closes the center bore, at which point the slide bush is then moved to its initial position.

Thus, an aerosol atomizer has been provided which fulfills the object of the invention, i.e. in which the product is pressurized by a simple and relatively inexpensive mechanism, namely simple piston cylinder means. The apparatus comprises only a few principal components, namely the body part of the apparatus, which may be integrally formed with the air pressure pump, a two-part piston cylinder means for pressurizing the product which is removably attached to the body part of the apparatus by a single formed conical shaft in a conical bore, as well as the nozzle insert and valve stem. All other parts, i.e. the sealing rings, the springs, etc., are easily accessible parts and cost very little.

Furthermore, the simply formed sliding sleeve 344 serves to control the fluid flow in such a way that the product is blown free of the spray nozzle and thus avoids the product from dripping from

Claims (15)

The appliance after the end of the art cycle ends the same as the product flow has been stopped in good time. All parts with the exception of the springs and possibly also the sealing rings can be molded or molded of plastic, so that a simple and inexpensive aerosol atomizer can be produced, which also works very reliably. PAIEUKBAY. An aerosol atomizer with manually operated means for dispensing one of a mixture of liquid and gas dust clouds and with at least one container (24) for a nebulized liquid product, with at least one means (25) for a propellant, with a nozzle device (3) comprising a nebulizer nozzle having a throughput, from an input end to the output end leading channel with a constant cross sectional portion (15¾) and an expansion sectional portion (16) whose cross section is at least full length equal to or greater than the cross-section at the transition point between the two portions (15 ^, 16), with at least one propellant inlet (38) passing through the nozzle device and near the transition point between the two portions (15 ^, 16) of the center channel; flow paths (39,39a) for liquid product from the container (24) to the nozzle (3) and for the propellant (31,38) from the fuel source (25) to the nozzle (3), the flow path (39,39a) for the liquid product being Federal one with the inlet end (40) of the middle channel of the nozzle device, and the flow path (31) for propellant is connected to: the inlet (38) opening transverse to the middle channel, which at its opening in the middle channel is flowed in a direction which forms at least one approximately the right angle with the center channel squeegee, and the overall cross-section of the entrance at its opening in the middle channel is greater than the cross-section thereof at the transition point where the container (24) for the atomizing product is connected to a device (32,34 ·) for production of pressure in the liquid, characterized in that - the propellant source (25) is a piston pump arranged in the nebulizer separate from the product container, - that a piston pump with a quantity of absorbing cylinder (32) is provided to pressurize this amount of liquid - the fluid reservoir (24-) and the propellant pump (25) are located at opposite ends of the atomizer; - one of the two mutually moving parts (52,54) of the liquid pump one is disposed between the propellant pump (25) and the end (21) of the nebulizer formed by the product container; - that shut-off devices (41,15) exist for fluid and propellant flow paths which are opened at the end of the stroke of the propellant pump, - and that the liquid pump is dimensioned so that after opening of the shut-off seals (41, 15) for the nozzle delivers fluid at a pressure greater than the pressure of the propellant supplied to the nozzle from the propellant pump. Aerosol atomizer according to claim 1, characterized in that it is dimensioned so that the liquid product flowing through the flow path (39,39a) will have a approx. 0.3 to 1 bar greater pressure than that of the nozzle (3) through the flow path (31.38) of propellant flowing propellant. Aerosol atomizer according to claim 2, characterized in that it is dimensioned so that the liquid product flowing through the flow path (59,59a) will have a pressure of approx. 2 to 8 bar above the ambient pressure, and the pressure through the flow path (51.58) to the flowing propellant is approx. 1.7 to 7 bar above ambient pressure. Aerosol atomizer according to any one of claims 1-5, characterized in that - the liquid pressure pump comprises a piston (54-, 55) and a cylinder (52), one of which can be moved relative to the other, - the shut-off means for controlling the flow of the propellant comprises a movable valve body (15) - the movable portion of the liquid pressure pump (52,54) is coupled to the valve body (15) and is movable by means of an actuator (50) substantially simultaneously with this to produce the pressure in the product, - that the moving part of the fluid pressure pump (54,55) and the valve body (15) of a return spring (45) is biased to the closing position of the valve body (15) and held in this position until it is opened by direct action of the actuator (50) and - the product shut-off member (41) is arranged to open substantially at the same time as the liquid pressure pump (32, 34) pressurizes the product. Aerosol atomizer according to claim 4, characterized in that - the piston pump (25) serving as a fuel source has a cylinder (26) and a piston (27), one part of which is fixedly attached to the nozzle (3) bearing part ( 20) of the nebulizer and the other can be moved relative to the fixed part through a compression stroke for compressing the air, - the flow path (31,54) of the propellant extends through the main part (20) from the air pressure pump to the nozzle to direct compressed air. to the nozzle, - that the valve body (15) movably disposed within the body portion (20) in the unaffected position closes the propellant flow path one (31,54), and - that the actuator (30) is arranged to cooperate with the movable portion of the piston pump and the valve body (15) shortly before the end of the piston pump compression stroke forcibly moves this, thereby releasing the propellant flow path (31,54) when the air compressed by the piston pump has reached a predetermined pressure. Aerosol atomizer according to claim 5, characterized in that - the plunger pump (26,27) and the liquid container (24) are arranged on opposite sides of the main part (20) - that a cylindrical bore (32) is formed in the main part (20). ) which aligns with the air pressure pump (26,27) and forms the cylinder (32) of the liquid pressure pump, and - that the movable valve body (15) is located at one end of the piston (34,67) of the liquid pressure pump, so that the piston (34,67) of the fluid pressure pump when the valve body (15) is moved to release the propellant flow path is moved in the direction in which it pressurizes the liquid. Aerosol atomizer according to claim 6, characterized in that - the plunger (34) of the liquid pressure pump has an extension (36) which extends towards the air pressure pump and is so formed that between the extension (36) and the inner wall of an internal mimic (32a) in the body (20), a portion (38) is delimited by the air flow path, - the nozzle (3) communicates through its inlet end with a space at the piston (34-) of the liquid pressure pump (36), and - the extension carried a passage through the piston (34-) or on this recessed fluid channel (39,59), which opens into the cylinder (32) of the liquid pressure pump near the inlet end of the nozzle (3). Aerosol atomizer according to claim 7, characterized in that - a ring groove (40) is formed around the extension (36), in which the liquid flow path opens (39), - - the valve for controlling the liquid flow comprises a sealing ring (4-1). which is enclosed in the annular groove (40) and which in the unaffected position keeps the fluid flow path (39) closed and which sealing ring can be stretched under the action of the pressurized fluid to open the fluid flow path. Aerosol atomizer according to claim 6, characterized in that - in the main part (20) an internal recess (32b) is formed between the cylindrical recess (32a) and the air pressure pump (26,27) as well as a first bore (32c) between the inner the recess (32b) and the cylindrical recess (32a) and connected to the inlet end of the central channel (59) of the nozzle (50), - that the internal recess (32b) is connected to the air pressure pump (26,27) through a second bore (31), - the valve body (15) is disposed in the inner recess (32b) and arranged to close the second bore (31), - that part (54-) of the air flow path extends through the main part (20) from the internal recess (32b) ) to at least one inlet duct (51) of the nozzle (50), - the fluid flow control means comprises a valve body (57) disposed on a valve stem (19) which closes in the unaffected position with the inlet end of said nozzle ( 58) and which opens the connection between it cylindrical recess (32) and said inlet end of said nozzle when the valve body (57) is moved in the upward direction, and - the valve spindle (19) is adapted to cooperate with a valve member passing through the first bore (32c) ( 18) which abut against the valve body (15) · Aerosol atomizer according to claim 6 or 7, characterized in that - the main part (20) on its end surface (20b) facing away from the air pressure pump carries a tubular socket (20a), the middle channel of which aligns with the liquid pressure cylinder (32), - that the product container (24) ) comprises a closure member (23) having a product outlet (23a) and sealingly attached to the tubular socket (20a), and - a valve member (45,46) for controlling the tubular socket (20a) is provided. the inflow of the product from the product container (22) to the liquid pressure pump cylinder (32), the product container (22) being removably disposed on the tubular socket (20a) and the valve member (45,46) so that the product container (22) can be replaced; Aerosol atomizer according to claim 6, 7 or 10, characterized in that - the liquid pressure piston (67) carries an extension (69) which extends towards the air pressure pump and is designed to form part of the air flow path between the extension (69) and the inner wall of the fluid pressure cylinder (32a), - that in the body (20) an air duct (64) is formed which communicates with the interior of the fluid pressure cylinder (32a) near the extension (69) and with the nozzle (60), the main part (20) is further provided with a product channel (71) from a point away from the air pressure pump in a direction away from the point of the air pressure pump (32a) to the nozzle (60), - that a sealing ring (68) is arranged between the fluid pressure piston (67) and the cylinder (32a) somewhere between the two channels (64 and 71), and - in the product flow path one between the product channel (71) and the liquid pressure cylinder (32a), a collapsible sealing ring (70) is arranged which is designed to collapse under product pressure to open flow the path through the liquid channel (59) to this product channel (71) · 142132 28 Aerosol atomizer according to claim 5, characterized in that - the air pressure pump one and the product container (22) are arranged at opposite ends of the main part (120) having a bore (132) which aligns with the air pressure pump and in which the cylinder of the liquid pressure pump (I39) 14-7b) is slidably mounted, - that the valve body (15) for the air flow controlling shut-off device is placed in the end face (139a) of the liquid pressure pump cylinder (147b), - that a liquid pressure piston (137) is fixed mounted on or integrally formed with the closure portion (23) of the product container, and on which liquid pressure cylinder a (147b) is slidably mounted, and - a product channel (141) leading from the interior of the cylinder is formed in the liquid pressure cylinder (139) (147d) to the nozzle (90). Aerosol atomizer according to claim 12, characterized in that - the nozzle (90) is arranged on or in part of the cylinder wall (139) of the product pressure pump and - that the transverse channel (141) connects the interior of the cylinder (139) with the middle channel of the nozzle. (91). Aerosol atomizer according to claim 5? characterized in that - the air pressure pump and product container (311) are arranged on opposite sides of the main part (310) in which a cylindrical cavity (320) constitutes the cylinder of the air pressure pump, - that a central bore is formed through the main part (310) (31353½), one end of which opens into the cylindrical cavity (320) and the other into the product container (311) - the main part (310) carries the nozzle (327) whose middle channel opens into the middle bore (313) through a product channel (331) and if compressed air inlet through a duct (332) is connected to the center bore (313) between the mouth of the product duct (331) and the cylindrical cavity (320), the liquid pressure pump comprises a fixed piston (315) having a through-going duct (316), which piston is secured to or integrally formed with the end of the body away from the cylindrical cavity (320), and a fluid pressure cylinder (311) 5 which is tightly slidably mounted on and around the fixed piston (315) 5 and