RS49816B - FLUID RENDER CONTAINER CONTAINING A PRESSURE CONTROL DEVICE WITH AN ACTION STEP AND PROCEDURE FOR PREPARING THE FLUID RENDER - Google Patents

Abstract

A fluid dispenser comprising a pressure control device with an actuating step for maintaining substantially constant, preset pressure in a fluid receptacle (1), wherein the pressure control device (8, 108, 808) comprises the first chamber (24, 124, 224, 324, 424, 524, 624, 724, 824) containing pressurized fluid, and in particular pressurized gas, then the second chamber (60, 160, 260, 360, 460, 660, 760 , 860) in which at least during use the intrusion pressure and a third chamber (62, 162, 862) formed by means of the interior space (4, 104, 204, 304, 404, 604) of the vessel (1) or in connection with it, but which is at least partially contained in the inner space (4, 104, 204, 304, 404, 604) of the vessel (1), wherein between the first chamber (24, 124, 224, 324, 424, 524, 624 , 724, 824) and a third chamber (62, 162, 862) housed a passage opening (28, 828) containing a closing element (94, 194, 294, 394, 494, 594, 694, 794) for forming a through hole (28, 828) during use when the pressure in the third chamber (62, 162, 862) is higher than the control pressure, while the control means (58, 158, 258, 358, 458, 558, 658, 758) movable by means of a movable or deformable part of the wall of the second chamber (60, 160, 260, 360, 460, 660, 760, 860) and is adapted at least to partially move the elements (94, 194, 294, 394, 494, 594, 694, 794 ) to close when the pressure in the third chamber (62, 162, 862) is lower than the control pressure to allow pressurized fluid flow from the first chamber (24, 124, 224, 324, 424, 524, 624, 724, 824) in the third mill (62, 162, 862), characterized in that the control means (58, 158, 258, 358, 458, 558, 658, 758) are brought to a position in which the bar is functionally separated from the element (94, 194, 294, 394, 494, 594, 694, 794) for closing and what device (8, 108, 808 (for pressure control adapted to functional control of the control means (58, 158, 258, 3 58, 458, 558, 658, 758) with element (94, 194, 294, 394, 494, 594, 694, 794) for closing before use with the activation steps.- The application contains 1 more independent and 8 dependent claims.

Description

Technical field

The subject invention relates to a container for dispensing fluids containing a device for managing pressure with an activation step, as well as to the procedure for preparing a container for dispensing fluids, and belongs to the field of packaging or packaging with special means for distributing their contents, more precisely to the distribution of liquid or semi-liquid contents using gas pressure, as well as to the field of devices or devices for pouring drinks under pressure, more precisely devices with the application of compressed air or other gas that indirectly or directly act to release drinks in containers. Invention marks according to MKP<7> are B 65 D 83/14 and B 67 D 1/04.

Technical problem

The technical problem that is solved by the present invention consists in how to design a container where it would be possible for the control device for pressure management used in it to move the closing element to the closed position when in the second chamber of the pressure vessel with a pressure control device there is a lower pressure than the desired control pressure, which would prevent the uncontrolled outflow of gas from the first chamber to the third chamber, and thus an undesirable increase in pressure in the container in order to increase the safety of the container device.

State of the art

A container of this type is known from document FR-A-2690142. This known container contains an inner space in which the fluid to be dispensed is located and in which a pressure vessel with a pressure control device is placed. In the pressure vessel, the first chamber was formed, into which gas was introduced under a relatively high pressure, with an exit opening that was closed with a closing element. This closing element is essentially made in the form of a rod, and thanks to the sealing 0 ring, it is in a hermetically sealed engagement with the outlet opening. One circumferential groove is made in the rod-shaped element. Opposite the first chamber in the pressure vessel, a second chamber is formed, which is closed on the cheese board closer to the first chamber by means of a membrane to which a rod-shaped element is attached by means of one of its ends. In the second chamber there is a control pressure due to the action of the gas. Between the first and second chambers there is a third chamber through which a rod-shaped element extends and which is provided with an opening that forms a fluid connection between the third chamber and the inner space of the vessel.

When in this known device there is a desired pressure in the third chamber which is, for example, equal to the control pressure, said groove is located in the third chamber, and the outlet opening is closed with a rod-shaped element. When fluid is released from the internal space, then the pressure in it will drop, resulting in a corresponding drop in pressure in the third chamber. As a consequence, part of the membrane wall of the second chamber will deform in the direction of the first chamber, thereby axially moving the rod-shaped element further into the first chamber. When the groove moves to the level of the sealing 0 ring, then the gas can escape under pressure from the first chamber through the groove, past the sealing 0 ring into the third chamber and from there into the inner space of the container. As a consequence of this, the pressure in the third chamber will increase, so that the membrane-shaped part of the wall deforms back against the action of the control pressure, thereby moving the rod-shaped element out of the first chamber. When the rod-shaped element is sealed again by the sealing 0 ring, then the gas will no longer be able to exit the first chamber, and in that state the pressure in the third chamber and in the inner space is approximately equal to the desired pressure again, and in this case the desired control pressure.

This known vessel has the disadvantage that control pressure must be provided in the second chamber already when the pressure control device is mounted, because otherwise the control means directly connected to the closing element will not function, or it will not activate that element, so gas will flow out of the first chamber. The reason for this is that when the assembly is carried out under normal ambient pressure, then the pressure in the third chamber is always lower than the control pressure in the second chamber. In order to eliminate this problem, it is proposed to install a pressure control device and to fill the vessel under overpressure, so as to compensate for the missing control pressure. However, this is technically complicated and very inconvenient.

The essence of the invention

The aim of the invention is to provide a vessel of the type described in the introductory part, where the mentioned disadvantages are eliminated, while its advantages are retained. For this purpose, the container according to the invention is characterized by the features according to claim 1, namely that before use the control means is brought to a position in which it is at least functionally separated from the closing element, and that the pressure control device is adapted to functionally connect the control means to the closing element before use by means of an activation step.

It is thus ensured that under the pressure prevailing in the third chamber, which is relatively low compared to the control pressure, for example, during the assembly and filling of the container, the movement of the control means does not push the closing element into the open position. This means that before use, the closing element will be permanently closed. Only when a specific activation step is performed, the functional connection of the control means and the closing element is achieved, so that the desired control pressure is obtained in the second chamber only during use, and that after the pressure in the third chamber is reduced in relation to the control pressure, the closing element can be pushed into the open position at the desired fluid pressure, as described in the introduction. Therefore, in order for control pressure to work, an actuation step must first be deliberately performed.

The pressure control device for use with a vessel according to the present invention has the further advantage that it can be easily stored and transported, without the risk of pressurized fluid escaping from the first chamber. In this way, important technical advantages in terms of safety, as well as considerable economic advantages, were achieved. In addition, the container according to the present invention can be assembled and filled under normal ambient pressure, since it allows the use of conventional lines for assembly and filling and does not require special pressure-related measures.

In one preferred embodiment, the container according to the present invention is characterized by features according to claim 2, namely that the control means contains a first part and a second part, wherein the first part is connected to the closing element, while the second part is connected to the movable or deformable part of the wall of the second chamber. In addition, the first and second parts contain first and second connecting means that can be brought from a first, separated position in which that part of the wall of the second chamber is freely movable with respect to the closing element to a second, connected position in which the connecting means are connected to allow movement of the closing element by displacement or deformation of that part of the wall of the second chamber.

In such an embodiment, in the first, separated position, the control means can freely move relative to the closing element along the selected distance, without activating the closing element. This means that the volume of the second chamber can vary within selected limits, for example, as a result of a change in pressure, without thereby allowing pressurized fluid to escape from the first chamber. By means of the activation step, the first and second connecting means can be brought to a second, connected position, which is such that the change in the volume of the second chamber, and especially its increase, activates the control means, so that it acts on the closing element in order to at least temporarily open the passage opening between the first and third chambers. For example, the vessel can be filled and the pressure control device can be mounted when the coupling means is in the first, separated position, thus preventing unwanted escape of pressurized fluid from the first chamber, while the vessel can be readily prepared for use by the actuation step discussed above. The activation step can be chosen so that it can be performed by the consumer himself and/or so that it can be performed by the manufacturer or retailer.

In this exemplary embodiment, the connecting means, first and second, are designed so that they can be brought to a first position in which they are functionally separated, so that the first part can be moved relatively freely with respect to the second part, without thereby activating the closing element. Only when the first and second connecting means are brought to the second position in which they are functionally connected, then the closing element can be moved to the open position by moving the control means. The activation step necessary for this can, for example, be performed by mechanical means such that the first and second parts move actively relative to each other, but it is primarily performed pneumatically, by temporarily increasing the pressure in the third chamber so that it is greater than the activation pressure, which is otherwise greater than the desired control pressure in the second chamber during use.

It is preferred that the pressure in the second chamber prior to the actuation step be substantially equal to the ambient pressure, and be at least approximately 1 bar. This prevents the moving part of the wall of the second chamber from being continuously and unnecessarily loaded.

The invention further relates to a method for preparing a container for dispensing fluid under essentially constant pressure, which is characterized by the features according to claim 6, namely that the pressure vessel in the form of a cylindrical can is supplied with a first part of the pressure control device that contains at least a closing element that is prestressed in the closed position and can be opened by means of an overpressure that is increased by external action. In doing so, the fluid, especially the gas, is introduced under a relatively high overpressure into the pressure vessel, and after the effect of the overpressure ceases, the closing element is brought to the aforementioned closed position. After that, the second part of the pressure management device is placed on the first part, which contains a control means controlled by the control pressure, which drives the closing element at least during use against the effect of the mentioned preload into the open position when there is a pressure in the environment of the pressure vessel that is lower than the mentioned control pressure. After that, the pressure vessel with the first and second parts connected is inserted into the container which is filled with the fluid to be dispensed and then closed, while the control means is actively functionally connected to the closure element by means of an actuation step.

By means of this procedure, the pressure control device can be easily filled with a pressurized fluid such as gas and then installed together with it, without the risk of unwanted leakage of the pressurized fluid from the first chamber into the environment. In fact, the closure element keeps the first chamber closed all the time, while the control means still cannot open it. Only when the control means is operatively coupled to the closure element by means of an actuation step can pressure control be effected by controlling the opening and closing of the closure element.

In one preferred embodiment, the process according to the present invention is further characterized with the features according to claim 7, namely that the second part is mounted in the means for closing the container, and at least with it, while the first part is mounted in the container at a small distance from the second part, and when the container is closed and then the second part is moved to the position for joining with the first part so that the movement of the second part activates the pressure control device.

By including the second part in the means for closing the container, at least at it, and mounting the first part in the container at a small distance from the second part,

it is possible to keep them in a container separately before use. Further, with such an embodiment in which the second part is movable relative to the first part, it is possible that the pressure control device can be activated by connecting the first and second parts with the aforementioned displacement. Thanks to the cooperation with the closing element, the control means will ensure the desired internal pressure in the container. In the case when the vessel is being filled, the internal space may already be pressurized

approximately equal to the control pressure in the second chamber. As a consequence, before connecting the first and second parts, the control means will be in the neutral position.

In the next preferred embodiment, the method according to the invention is characterized by features according to claim 9, namely that before use, an overpressure is temporarily created in the inner space of the container for the active functional connection of the control means with the closing element.

In such an exemplary embodiment, the pressure in the inner space of the container is essentially temporarily raised, for example, by introducing an additional amount of gas under pressure, especially C02, into the upper space of the container, so that the control means is activated and brought to an active, functionally connected position when connected to the closure element. Since the upper space is normally relatively small, a relatively small amount of gas should be additionally introduced, which the drink can easily absorb, so that the pressure will then drop relatively quickly. The opening and closing of the closure element is then actively controlled by a pressure control device. It is also clear that it is possible to achieve the desired increase in pressure by reducing the upper space, for example, by deforming part of the wall of the vessel in the direction of the inner space or by inflating an element in the form of a balloon located in the vessel.

The desired activation step can be performed by the manufacturer himself, for example by introducing some amount of CO2 or by deforming a part of the wall immediately after filling the vessel, during the closing of the vessel or immediately after it. Also, a means may be provided to allow the consumer to perform this step for

actuation, for example, by means of an internal or external gas cartridge that fits into the opening of a fluid discharge device or the like.

As a fluid under pressure in the device or process according to the invention, primarily gas is used, and in particular CO2 or gas containing CO2. However, other pressurized fluids can also be used, for example liquids. The pressurized fluid can also be obtained chemically, for example by co-feeding calcium, (bi)carbonate and an acid, such as citric acid. In this way, gas under pressure, and especially CO2, is obtained. Many variations of this solution are possible. So, for example, it can be in the third chamber. located (bi) carbonate or other calcium-containing product, at least on the opposite side of the closing element.

Other preferred embodiments of the vessel and method according to the invention are set forth in the following dependent claims.

Brief description of the draft images

In order to explain the invention in more detail below, exemplary embodiments of the pressure control vessel and device will be described with reference to the drawings. In the drawing: Fig.1 schematically shows a cross-sectional side view of the container according to the subject invention with a pressure control device; Fig. 2 shows a cross-sectional side view of the general construction of a pressure control device to be used with a container according to the invention; Fig. 3AB show in cross-section the side view of the part of the vessel according to the present invention with the part of the device for controlling the pressure, in Fig. 3A in the first, separated state, and in Fig. 3B in the second, connected state when the vessel is prepared for use; Fig.4 shows a cross-sectional side view of the pressure control device in one variant example of execution; Fig.5 shows a cross-sectional side view of the pressure control device in another variant example of execution; Fig. 6 shows in section the side view of a part of the pressure management device in the third variant example of execution; Fig. 7 shows in cross-section the side view of a part of the pressure control device from Fig. 6 in the fourth variant example of execution; Fig. 8 shows in cross-section the side view of the part of the pressure control device from Fig. 6 in the fifth variant example of execution; Fig. 9 and 9A show in cross-section a side view and a front view of a part of the pressure control device of Fig. 6 in the sixth variant example of execution; Fig. 10, 10A and 10B show a part of the pressure management device from Fig. 6 in the seventh variant example of execution, and Fig. 10 is a cross-sectional side view in the first, separated state, and Fig. 10A in the second, connected state, while Fig. 10B shows an axonometric view of the part of the pressure management device in a disassembled state; Fig. U shows in section a side view of a part of the pressure control device of Fig. 6 in an eighth variant embodiment which is specially adapted for use with flap valves; and Fig. 12 shows a cross-sectional side view of the next variant embodiment of the pressure control device.

Detailed description of the invention

Fig.1 schematically shows a side view of the vessel 1 in the form of a cylindrical can, in the inner space 4 of which the fluid 2, in this case a drink, is placed. In the container 1, there can also be an upper space 6, which is, for example, filled with gaseous carbonic acid. In the vessel 1, a pressure control device 8 is further placed, which includes a pressure vessel 10, which is also made in the form of a cylindrical can, a valve assembly 12 and an outlet 14. In the pressure vessel 10, in a manner that will be described in more detail below, gas is placed under a relatively high pressure. By means of the valve assembly 12, in a manner that will be described in more detail below, gas can be introduced from the vessel 10 under pressure via the pressure control device 8 into the inner space 4 of the vessel 1 in order to control the pressure therein. In the embodiment shown in Fig. 1, on the side wall of the vessel 1, a dispensing device 16, in this case a tap, is placed, by means of which fluid 2, in this case a drink, can be dispensed from the inner space 4.

Fig.2 shows a cross-sectional side view of part of the pressure control device 8, which is described in more detail in the Dutch patent application filed on the same day for the invention entitled "Container with pressure control device for dispensing fluid". This exemplary embodiment is described to illustrate the general principle of operation of such a pressure control device 8 .

In this embodiment, the pressure control device 8 comprises a first housing 18, a middle part 20 and a second housing 52. The middle part 20 contains a closure element 94 which in this embodiment is a valve of the type commonly used in spray cans, such as e.g. containers for aerosols and the like. Such a valve is generally known from practice. Fig. 2 shows a suitable embodiment of the closing element 94, which in this case is a valve, but it is clear that other types of valves can also be used in the pressure control device 8 according to the present invention. So, for example, instead of the male valve shown, female valves or flap valves can be used. In the example shown, the closing element 94, i.e. valve, contains a third housing 95A, which is immovably connected to the connecting part 22 of the middle part 20 and which has in it a fourth chamber 86 in which the compression spring 42 is placed as a preloading means. Thanks to this, the closing element 94, i.e. valve, is biased in the closed position. The rod-shaped member 96 is held between the coupling portion 22 and the upper end of the spring 42 by an annular outlet 98A and extends to a point outside the coupling portion 22 . In its part, which is located outside the part 22 for connection, an axial opening 36 is made in the form of a blind opening. Above the annular outlet 98A, there is a radial opening 37 that ends in an axial opening 36. In the shown position, the radial opening 37 is closed by a sealing ring 39

placed in the part 22 for connecting the middle part 20. The second housing 52 is mounted on the middle part 20 by means of suitable connecting means 48, 50, such as e.g. snap-in means. Inside the second housing 52, the second chamber 60 is separated from the third chamber 62 by an axially movable control means 58, which in this embodiment is a piston. The third chamber 62 is connected to the inner space 4 of the vessel 1 via the outlet opening 64. On the lower side of the control device 58, i.e. of the piston, there is a cylindrical part 95 with an axial opening 98 which, with a suitable fit, can be attached over the upper end of the rod-shaped element 96. On that side of the cylindrical part 95 which is closer to the control means 58, i.e. piston, an annular outlet 99 with an axial opening 98 is formed, which rests on the upper end of the rod-shaped element 96. Radial openings 97 extend outward from the axial opening 98, which bring the axial opening 98 into fluid connection with the third chamber 62.

As described in more detail in the above-mentioned Dutch patent application filed on the same day, the control pressure acts in the second chamber 60, i.e. the pressure by which the operation of the pressure control device 8 is controlled, so that after reducing the pressure in the third chamber 62 and the internal space 4 below the minimum desired pressure, the volume of the chamber 60 increases, while the control means 58, i.e. the piston moves downwards, so that the rod-shaped element 96 also moves downwards against the force of the spring 42, and in the direction of the first chamber 24. In this way, a fluid connection is obtained between the first chamber 24 and the third chamber 62 via the passage opening 28 in the third housing 95A, the fourth chamber 86, the radial opening 37, the axial openings 36, 98 and the radial openings 97.

In the first chamber 24, the required amount of the medium under pressure, and in particular a gas such as C02, under overpressure, is placed. Inside the first housing 18, the first chamber 24 is predominantly filled with activated carbon, for example, with activated carbon fibers 26, which have a high adsorption and absorption power for the aforementioned gas under pressure, and especially for C02 or gas containing C02. Thanks to this, a very large amount of pressurized gas can be accommodated in the first chamber 24 in relation to the pressure thus obtained. This provides the advantage that the first chamber 24 can be relatively small and still contain enough gas under pressure. Such application of activated carbon is described in applicant's previously filed Dutch Patent Application 1009654, which is incorporated herein by reference.

Instead of or in addition to CO2, the first chamber 24 may contain various other pressurized fluids, for example, pressurized liquid. Likewise, in the first chamber 24, one reactant may possibly be placed which can react with another reactant in order to form a pressurized agent such as CO2 through their reaction. This can be, for example, some acid and some calcium product, such as citric acid and (bi)carbonate, whereby the second reactant can be placed in the first chamber 24 and can react only after the pressure is reduced in it, or in the third chamber 62, and at least on the other side of the closing element 94, in this case the valve, which is further away from the first chamber 24. In this case, the reaction between the reactants does not take place until the closing element is temporarily pushed to the open position after reducing the pressure in the inner space 4, the vessel 1 and the components are introduced together or subjected to a pressure change sufficient to produce the desired gas. Other reactions can also be used, which are chosen, among other things, depending on the type of fluid to be dispensed from the vessel 1.

When the fluid connection described above is formed between the first chamber 24 and the third chamber 62, the gas escapes under pressure and flows through the passage opening 64 into the inner space 4 of the container, thus increasing the pressure prevailing in it. In addition, the pressure in the third chamber 62 increases, so that the control means 58, i.e. the piston moves upwards against the action of the control pressure in the second chamber 60 until the rod-shaped element 96 moves back to the position shown in Fig. 2 and the radial opening 37 is closed by means of the sealing ring 39. Therefore, such a pressure control device 8 continuously maintains the desired pressure in the inner space 4 of the container 1. Namely, when the fluid is released from the container 1, then the pressure in the inner space 4 and the third chamber 62 decline and management tool 58, i.e. piston, will move downwards in order to regulate the pressure described above.

In the shown embodiment, the control device 58, i.e. the piston is connected to the rod-shaped element 96, while the second housing 52 is connected to the first housing 18. This enables the immediate active functional connection of the control means 58, i.e. piston, with the closing element 94, in this case with a valve. However, this means that in the case when such an assembly is not stored and assembled under sufficiently high environmental pressure, i.e. when the pressure in the second chamber 60 is lower than the desired control pressure, and due to the direct effect of the control means 58, i.e. of the piston, to the closing element 94, i.e. the valve, said closing element 94, i.e. the valve opens, due to which the gas escapes from the first chamber 24 into the environment.

In order to eliminate this shortcoming, according to the present invention, it is proposed to functionally separate the control means 58, i.e. piston, or other suitable control means of the closing element 94, i.e. valve, or other suitable closing element and that their proper functional connection is performed only after the actuation step. With reference to Fig.3-12, several embodiments of such a pressure control device will be described, and it is also emphasized that the control means used therein may be of a different design, for example, as shown in the above-mentioned Dutch patent application filed on the same day, by the same applicant.

Fig. 3 A and B shows a cross-sectional side view of a portion of a preferred embodiment of a vessel according to the invention with a pressure control device part 108, for example, as shown in Fig. 1 and 2. Incidentally, it is clear that other embodiments of the pressure control device according to the present invention than those shown here can also be used for the vessel.

Fig. 3 A shows the pressure control device 108 which is in the first, i.e. separated, position, whereby part of the wall 103 of the container with an opening 115 in it, in which there is a moving means 117 for closing in a sealing engagement with a rubber sealing ring 119 or a similar sealing element, is shown in this picture. At some distance below the opening 115, the first housing 118 of the pressure control device 108 is suspended by means of an adjustable hanging means 121, whereby the pressure control device 108 is mounted so that its position cannot be changed. In the closure means 117, on that side of it which is closer to the first chamber 124, there is a space 123 in which the second housing 152 can be attached by abutting with a small flap, so that the corresponding coupling means 150 on the second housing 152 extends at a short distance from the mating coupling means 148 on the first housing 118. The axial opening 198 is also located at a short distance from element 196 in the form of a bar. In this position, the closing element 194, i.e. valve, cannot be activated, and at least cannot be opened, so that the gas cannot escape from the first chamber 124 into the inner space 104.

In the closure means 117 there is a discharge channel 125 which is connected at one end to the space 123, while at the other end it can be connected, for example, to a hose 127, which can further be connected to a fluid discharge device or the like. A series of ribs 128 are placed in the space 123, which hold the end wall 156 of the second housing 152 at a distance from the walls of the space 123 in both axial and radial directions. Thanks to this, during use the drink can flow past the second housing 152 to the protrusion channel 125 regardless of the position of the closure means 117.

In order to prepare the pressure control device 108 for use in the vessel of Fig. 3 A, the closing means 117 only needs to be moved in the direction of the interior space 104, i.e. downwards in this case, thereby pushing the second housing 152 securing it to the first housing 118 by means of coupling means 148, 150. At the same time, this pushes the axial opening 198 into position over the rod-like element 196. This second, or connected, position in which the pressure control device 108 is prepared for use is shown in Fig. 3B. The closing means 117 can then be moved upwards again, but can eventually be fixed in the pressed position. In the state shown in Fig. 3B, the pressure in the inner space 104 is controlled depending on the control pressure in the third chamber 162, in the manner described above.

In the variant of the embodiment of Fig. 3, which is not shown, the closing means 117 contains a valve that closes the protrusion channel 125 in the state shown in Fig. 3 A, i.e. in the maximally upshifted state. This valve opens automatically when the closing means 117 in Fig. 3 A is pushed down. The advantage achieved thereby is that the closing means 117 also functions as a faucet at the same time. The outlet channel 125 may, however, be omitted, if a second tap is provided, for example, as shown in Fig.1.

Also in the embodiment shown in Fig. 3, the control means 158, i.e. piston, may be connected to the rod-shaped element 196 so that the chamber 160 is relatively large before actuation, and is reduced only when the closure means 117 is pressed down. Fig.4 shows a variant embodiment where the second housing 252 of the second chamber 260 is connected to the closing element 294, i.e. valve, while the control means 258, i.e. piston, extends into the open end of the housing 252 which is further away from the first chamber 224 and can be fixed in two different positions with respect to the wall 203 of the vessel. In Fig. 4, on the left side, the control device 258 is shown, i.e. the piston, which is fixed in the upper position, causing the second chamber 260 to be relatively large and essentially unpressurized, so that the housing 252 will remain stationary. By pressing the control device 258, i.e. piston, down to the position shown on the right side in Fig. 4, in which it is held on the wall 203 by the outlet 253, the volume of the second chamber 260 is significantly reduced, so that the desired control pressure is obtained therein. A burst of pressure in the interior space 204 will immediately result in the housing 252 moving away from the steering means 258, i.e. piston, in the downward direction, which activates the closing element 294, i.e. valve, in order to release the gas from the first chamber 224. Fig.5 shows an example of the embodiment of the control device according to the invention where the first chamber 324 is provided with a closing element 394, i.e. valve, which in the shown example is a male valve. It is clear, however, that it can also be a flap valve or a female valve. The second chamber 360 is located in the housing 352, in which the control device 358 is placed with appropriate fit, i.e. the piston, together with the sealing O-ring 370. The spindle 366 is rigidly connected to the control means 358, ie. piston, and extends in the direction of the closing element 394, i.e. valve. The free end 367 of the spindle 366 is not connected to the closing element 394, i.e. valve. Essentially cylindrical

the middle part 369 has a first, open end 381 by which it is fastened to the closing element 394, i.e. valve, and its peripheral wall is provided with a plurality of through radial openings 397 intended to form a fluid connection between the first chamber 324 and the third chamber 304 when the closing element 394, ie. valve, open. The middle part 369 is provided with an extended part 371 with a support 373 at the second end 379, which is further away from the first chamber 324. The free end 367 of the spindle 366 extends into the opening 375 of the middle part 369 and is provided with elastic elements 377 that are prestressed outwards, and which in this example of execution represent outlets. In the first position shown in Fig.5, the elastic elements 377 rest on the inner side of the narrow part of the opening 375, between the closing element 394, i.e. the valve, and the support 373. This means that the control means 358, i.e. the piston can freely move along a preselected distance which is determined on the one hand by the minimum distance between the free end 367 and the closing element 394, i.e. the valve, and on the other hand by the position of the elastic elements 377 and the support 373. In fact, when the control means 358, i.e. piston, moves further inside the housing 352 in the direction of the end wall 356, up to the position represented by the dotted line or beyond it, the free ends of the elastic elements 377 come into position above the support 373 and pop out, so that after further downward movement of the control means 358, i.e. piston, engage the upper surface of the support 373. The elastic element 377 and the support 373 thus form the first and second connecting means. When the control device 358, i.e. the piston, moves down from the position represented by the broken line, then as a result of the increase in the volume of the second chamber 360, the middle part 369 moves down together with it and thereby opens the closing element 394, i.e. the valve.

From the position of management asset 358, i.e. piston, which is shown by a solid line in Fig. 5, and which does not allow the functioning of the closing element 394, i.e. valve, it can be brought into position for use by an actuation step. For this purpose, for example, the pressure in the internal space 304 is temporarily increased by external action, so that the control means 358, i.e. the piston moves upwards to the position shown by the broken line overcoming the action of the control pressure in the second chamber 360. As a consequence, the elastic elements 377 move above the support 373 and the active position of the pressure control device is realized. It is clear that this can be achieved, for example, by mechanically pulling the control means 358, i.e. piston, to the position represented by the broken line or in any other suitable way.

Fig. 6 schematically shows another variant example of execution, in which an opening 475 is made in the spindle 466, whereby the spindle 466 is connected to the control means 458, i.e. piston, so that the opening 475 has a blind end 479. At the open end 481, the opening 475 is provided with an expanded part 471, so that at a distance from the blind end 479 a support 473 is formed. valve, and a female valve in this case, and is provided with a passage 497 in order to form a fluid connection between the first chamber 424 and the inner space 404 of the vessel when the element 494 is for closing, i.e. valve open. At its other end, the middle part 469 is provided with elastic elements 477 which are prestressed outwards, and which in this example of execution represent outlets. When the free ends of the elastic elements 477 are squeezed together, they can slide into the relatively narrow part of the opening 475, between the blind end 479 and the support 473, where these elastic elements 477 can move freely in the longitudinal direction, so as to allow the movement of the control means 458, ie. piston, without closing element 494, i.e. valve, activates. Only when the control device 458, i.e. piston, move so that the volume of the chamber 460 is significantly reduced and the free ends 483 of the elastic element 477 are moved below the support 473, the elastic elements 477 can be spread so that their free ends 483 can engage the support 473 by resting on it. In this position, the movement of the control means 458, i.e. piston, in the change of element 494 for closing, i.e. of the valve, results in the middle part 469 being pressed down together with it, thus opening the closing element 494, i.e. valve. The first and second positions of the first and second connecting means forming the spindle 466, the support bar 473, the middle portion 469, and the elastic bar members 477 are represented by broken lines in the first, separated position, and by solid lines in the second,

connected position.

Fig.7 shows a part of the control device from Fig.6, where the control device 458, i.e. piston, has a spindle 466 which is divided into two parts 466A, 466B.

The first, cylindrical part 466A is rigidly connected to the control means 458, ie. piston, and is provided at the free end with a flange 461 which extends inwards, having a single opening in the centre. Through that opening extends the second part 466B of the spindle 466, which at the end which is located inside the first part 466A of the spindle 466 is provided with an extension that ensures its proper guidance, and in addition rests on the flange 461 when the second part 466B of the spindle 466 is moved downwards as much as possible. In the second part 466B of the spindle 466, an opening 475 is made, which has a widened part 471 at its outer free end, which forms a support 473. The elastic elements 477, which are not shown in Fig. 7, of the middle part 469, such as the one shown in Fig. 6, can again be accepted in the opening 475 in the first and second positions, which have already been said before. In this example of execution, the advantage that greater free movement of the control means 458 is enabled, i.e. piston, when the elastic elements 477 and the support 473 as connecting means are in the first, separated position that does not allow the activation of the closing element 494, i.e. of the valve, since the second part 466B of the stem 466 can move freely relative to the first part 466A of the stem 466 along the distance S. Only when the inner end of the second part 466B of the stem 466 rests on the piston 458A and the elastic elements 477 rest on the support 473, the closing element 494, i.e. valve, can be activated.

Fig.8 shows the next variant example of the execution of the control means 458, i.e. piston, with spindle 466 for use with the pressure control device of Fig.6. In the extended part 471 of the opening 475, one edge 485 extends from the support 473 in the direction opposite to the control means 458, ie. piston, and the blind end 479 of the opening 475, whereby that edge 485 is located inside the extended part 471. In this embodiment, the free ends 483 of the elastic elements 477 have to pass by the edge 487 of the edge 485 in order to move from the first, separated position to the second, joined position in order to be able to rest on the support 473. The advantage achieved by this is that means of control 458, i.e. the piston, must move relative to the housing 452 along a relatively large distance, ti. the volume of the second chamber 460 must be significantly reduced, that is, it will become smaller than necessary to create the desired control pressure. This means that the possibility of undesired activation of the closing element 494, ie. valve, significantly reduced, which increases even more the safety of the container according to the invention. Fig. 9 and 9A show in section a side view and a front view of the next variant example of the implementation of the control means for the container according to the present invention. In this embodiment, it is on element 594 to close, ie. valve, at the first chamber 524, a middle part 569 with a passage 597 is attached, and an elastic element 577 is placed on the middle model 569. In the position shown in Fig. 9, the elastic element 577 is possibly prestressed to the left, for reasons that will be described below. For control device 558, i.e. piston, with the piston ring 570 is attached the spindle 566, which is provided with two openings which are located next to each other. Fig.9 shows that the first opening 575A, which is located on the left side, has a depth Si, and that the second opening 575B, which is located on the right side, has a depth S2, which is greater than the depth S|.

The depth of the opening 575A,B is normally determined starting from the open end 581 of the opening 575A,B, which is normally further away from the control means 558, i.e. clip. In the shown embodiment, the elastic element 577 is provided with a head 591 at its free end, which is made in the form of a transverse rod. The first opening 575A is separated from the second opening 575B with a partition 595 that ends at a distance from the open end 581. At the open end 581 of the opening 575A,B, a partially flexible flap 593 is attached to the side of the first opening 575A and extends diagonally to the opposite wall of the second opening 575. In the flap 593, a slot 593A is made through which can provide an elastic element 577. Then the head 591 rests on the side with the arms of the flap 593 in the form of a fork which is otherwise closer to the control means 558, i.e. clip.

Fig.9 shows the first, separated position, in which the head 591 extends into the second opening 575B between its blind end 579B and the valve 593. The control means 558, ie. the piston is then free to move along a height determined by the distance between the free edge 599 of the partition 595 and the blind end 579B of the second opening 575B. When the control device 558, i.e. the piston moves upwards until the head 591 comes under the free edge 599 of the partition 595, it will be guided in the first opening 575A by the valve 593. If after that the control means 558, i.e. piston, move down again, head 591

will be received in the first opening 575A and will rest on the tow end 579A of the first opening 575A, thereby obtaining a second, joined position. After the mentioned downward movement of the control means 558, i.e. piston, element 594 for closing, i.e. the valve will be activated via the elastic element 577. The valve 593 prevents the head 591 from being released from the opening 575A,B. In addition, the flap 593 is located so close to the free edge 599 of the partition 595 that the head 591 cannot easily move between them when moving up along the flap 593. This prevents the head 591 from moving back into the second opening 575B. Incidentally, it is emphasized that when the elastic element 577 is sufficiently prestressed in the direction of the first opening 575A, then the flap 593

possibly it can be omitted.

Figs. 10, 10A and 10B show a cross-sectional side view and an axonometric view, respectively, of portions of a further variant embodiment of a pressure control device particularly adapted for use with a poppet valve. Such flap valves, by means of which the passage can be opened or closed by tilting the actuating stem, are known in practice and will not be further described here. In this exemplary embodiment, the closing element 694, i.e. the valve, with flap connected to the first chamber 624, is provided with a rod-shaped member 669 which in this exemplary embodiment is an actuation stem with an enlarged head 667. The enlarged head 667 preferably has a convex tip. In the housing 652 of the second chamber 660, the control device 658 is accepted, i.e. the piston, on which the fork-shaped element 666 is attached, which in this embodiment represents the spindle. Management tool 658, i.e. piston, has a direction P of movement extending at an angle, preferably at right angles to the center line L of the closure element 694, i.e. valve, with valve and spindle 669 for activation. Spindle 666 of control means 658, i.e. piston, is supplied with the first fork 690 and with the second fork 692. On

Fig. 10B is an axonometric view of a spindle 666 with a first fork 690 and a second fork 692, together with an actuation spindle 669 with its extended head 667. The first and second forks 690, 692 are located in parallel planes V spaced apart. In the neutral position shown in Fig. 10B this distance is denoted by d^ Each fork 690, 692 has two arms with intermediate slots 690A and 690B, respectively, which are open at the end thereof remote from the control means 658, ie. clip. The slots 690A,B have a width greater than the width of the actuation spindle 669, but less than the width of the extended head 667. Accordingly, the two forks 690, 692 can slide between the closure member 694, ie. valve, and extended head 667, along actuation spindle 669. The first fork 690 is shorter than the second fork 692, as is the slot 690A formed therein. The closed end 679A of the first slot 690A lies at a distance from the control means 658, ie. piston, which is greater than the distance between the control means 658, i.e. piston, and the closed end 679B of the second slot 690B.

Fig. 10 shows the pressure control device in the first, separated position, whereby the first fork 690, which is elastically deformed to a certain extent, rests on the top of the extended head 667. The materials and deformation of the fork 690 are selected to allow the movement of the control means 658, i.e. piston, in the direction of P, without moving the spindle 669 together with it for activation, i.e. activating the closing element 694, i.e. valve, with valve. From this position, the pressure control device can be activated by moving to another, connected position thanks to the movement of the control means 658, i.e. of the piston, in the direction of the end wall 656, so that the free end of the first fork 690 passes the expanded head 667, as shown in Fig. 10A. The elastic deformation stress in the first fork 690 will then cause it to return to the plane V, so it will extend below the underside of the extended head 667. Thanks to this, after the return of the control means 658, ie. of the piston, in the direction of the closing element 694, i.e. valve, the actuation stem 669 will be received in the first slot 690A. After further movement of the control device 658, i.e. of the piston, in a direction opposite to the end wall 656, and after increasing the volume of the chamber 660, the closed end 679A will rest against the actuating stem 669 and, after further movement, will draw the actuating stem 669 with it, so that it will be tilted with respect to the center line L discussed. This will open the closing element 694 ie. valve, with a flap, so the gas will be able to flow from the first chamber 624 into the inner space 604. After increasing the pressure in the inner space 604, the control means 658, i.e. the piston, will move back, thereby reducing the second chamber 660, so that the closing element 694, ie. the valve, with flap, can return to its closed position. Optionally, on the actuating spindle 669 between the closing element 694, ie. valve, and extended head 667 can be

a guide ring 667A, which is represented by a broken line in Fig. 10A, is positioned so that at least the second fork 692 will be guided between the closing element 694, i.e.

valve, and guide ring 667A, which achieves even better positioning.

Fig. 11 shows a simple embodiment of the pressure control device intended according to the present invention to actuate the closure element 794, i.e. valve, with valve. In this embodiment, the control device 758, i.e. piston, which confines the second chamber 760 within the housing 752

includes a spindle 766 with a free oblique end 781. On the element 794 for closing, ie. valve, with the flap on the first chamber 724, a part 769 is placed for connecting also with the inclined free end 783. The spindle 766 is guided inside the housing 752 by means of the guide 757. After the expansion of the second chamber 760, the spindle 766 moves downwards, in the direction of the closing element 794, i.e. valve, with valve. The cooperating beveled ends 781, 783 will ensure that the closure element 794, ie. the valve, with the flap changes from the closed position to the open position. Such a solution can also be easily used in those embodiments described above, in which flap valves are used instead of valves or other suitable closure elements shown there.

Fig. 12 shows a further variant example of the embodiment of the pressure control device 808 according to the invention. In this exemplary embodiment, a through opening 828 with an axial opening 836 is made in the recess 872 in the first housing 818. The closing element 840 in the form of a ball is pushed onto the seat 834 by means of a spring 842 which is a means of prestressing, whereby the tube 880 extends from the closing element 840 through the axial opening 836 into the recess 872.

Spring 842 and closure member 840 are located in fourth chamber 886 with inlet ports 888 terminating in first chamber 824. As a result,

the recess 872 may be located at a relatively large distance from the wall of the first housing 818. In this embodiment, the second housing 852 is located in the recess 872 so that its end wall 856 abuts the bottom 878 of the recess.

In this embodiment, the control device 858, i.e. piston, is made as a cylinder with an outer circumference approximately corresponding to the inner circumference of the second housing 852, with the insertion of a suitable piston ring 870 or similar sealing means that is impermeable to both gases and liquids. Between management tool 858, i.e. piston, and the end wall 856, a second chamber 860 is formed. At the end of the control device 858, i.e. piston, which is further away from the second chamber 860

is contained control means 866, which is performed as a disk 867 with edges 890,

892 in the form of a closed coupe. This disk 867 has an outer diameter which, for example, approximately corresponds to the inner diameter of the recess 872, while the smallest diameter of the edges 890, 892 in the form of a hemmed cup is approximately equal to the diameter of the control means 858, ie. clip.

When the control device 858, i.e. clip, located in neutral, i.e. separated position, and there is low pressure in the second chamber 860, then the lower edge 892 in the form of a hemmed compartment is located against the upper side of the valve 880. Due to this, the closing element 840 cannot be activated by the control means 858, i.e. by the piston, since it is pushed outward by the spring 842. When the pressure in the third chamber 862 rises at least temporarily, then the control means 858, i.e. the piston, pushes down, thereby reducing the second chamber 860 and increasing the pressure in it. Control device 858, i.e. the piston is then pushed past the pin 880 temporarily pushing it back against the action of the spring 842. When the control means 858, i.e. piston, passes, then the closing element 840 is pushed back into the closing position. This activates the pressure control device 808. When the pressure in the third chamber 862 drops again to a value lower than the control pressure, the control means 858, i.e. the piston is pushed upwards, thereby pushing the pin 880, and thus the closing element 840 against the action of the spring 842, thus forming a fluid connection between the first chamber 824, the inlet openings 888, the fourth chamber 886 and the passage opening 828, in order to increase the pressure in the third chamber 862, and thus in the inner space of the vessel. When the pressure in the internal space increases sufficiently, the control means 858, i.e. the piston is again pushed back into the position shown in Fig. 12 and the closing element 840 is closed again.

In principle, the pressure control devices according to the present invention have the important additional advantage that after a drop in the control pressure in the second chamber, for example, due to leakage, or leaks, the control means moves to the closed position, so that it is simply and effectively prevented that the gas flows uncontrollably from the first chamber to the third chamber and causes an increase in pressure in the container, at least in the third chamber. In this way, the safety of the vessel according to the invention, and especially of the pressure management device used in it, is significantly increased.

Claims (10)

1. A fluid dispensing container comprising a pressure control device with an actuation step to maintain a substantially constant, preset pressure in a container (1) adapted to dispense liquid, wherein the device (8, 108, 808) for pressure management contains a first chamber (24, 124, 224, 324, 424, 524, 624, 724, 824) which contains a fluid under pressure, and in particular a gas under pressure, then a second chamber (60, 160, 260, 360, 460, 660, 760, 860) in which at least during use is governed by the control pressure, and the third chamber (62,162, 862) which is formed by means of the inner space (4, 104, 204, 304, 404, 604) of the container (1) or is related to it, but which is at least partially contained in the inner space (4, 104, 204, 304, 404, 604) (1), with the container between first chambers (24, 124, 224,324, 424, 524, 624, 724, 824) and the third chamber (62, 162, 862) placed a passage opening (28, 828) which contains an element (94, 194, 294, 394, 494, 594, 694, 794) for closing in order to close the passage opening (28, 828) during use when the pressure in the third chamber (62, 162, 862) higher than the control pressure, while the control means (58, 158, 258, 358, 458, 558, 658, 758) is movable by means of a movable or deformable part of the wall of the second chamber (60, 160, 260, 360, 460, 660, 760, 860) and is adapted to at least partial displacement of the member (94, 194,294, 394,494, 594, 694, 794) to close when the pressure in the third chamber (62, 162, 862) is lower than the control pressure to allow pressurized fluid to flow from the first chamber (24,124, 224, 324, 424, 524, 624, 724, 824) in the third chamber (62, 162, 862), indicated by the fact that, before use, the control means (58, 158, 258, 358, 458, 558, 658, 758) is brought to a position where it is at least functionally separated from the element (94, 194, 294, 394, 494, 594, 694, 794) for closing and wherein the pressure control device (8,108, 808) is adapted to operatively couple the control means (58, 158, 258, 358, 458, 558, 658, 758) to the element (94, 194, 294, 394, 494, 594, 694, 794) to close before use using the steps for activation. 2. Container according to claim I, characterized in that the control means (58, 158, 258, 358, 458, 558, 658, 758) comprises a first part and a second part, wherein the first part is connected to the element (94, 194, 294, 394, 494, 594, 694, 794) for closing, while is a second part connected to a movable or deformable part of the wall of the second chamber (60, 160, 260, 360, 460, 660, 760, 860), and That the first and second parts contain first and second connecting means that can be brought from the first, separated position in which that part of the wall of the second chamber (60, 160, 260, 360, 460, 660, 760, 860) freely movable with respect to the element (94, 194, 294, 394, 494, 594, 694, 794) for closing to a second, connected position in which the connecting means are connected to enable movement of the element (94, 194, 294, 394, 494, 594, 694, 794) for closing by moving or by deformation of that part of the wall of the second chamber (60, 160, 260, 360, 460, 660,760,860). 3. A container according to claim 2, characterized in that the first connecting means contains a plurality of elastic elements (377, 477) which are prestressed outwardly, while the second connecting means contains an opening (375, 475) which is at least partially wider at the open end (381, 481) than at the opposite end (379, 479) in order to form a support (373, 473) at a distance from it, wherein elastic elements (377,477) in the first, separated position are supported on the inner side of the opening (375, 475) between the support (373, 473) and the narrow end (379, 479), while in the second, joined position they are supported on that side of the support (373, 473) which is closer to the wider, open end (381, 481). 4. Container according to claim 2 or 3, characterized in that the first connecting means is connected to the first part. 5. Container according to claim 2, characterized in that the closing element is a valve (694) with a flap, wherein the first connecting means comprises a rod-shaped element (669) having an expanded head (667) and is connected to the valve (694) with a flap, while the second connecting means comprises a fork-shaped element (666) having at least two forks (690, 692) each with two arms and one middle one by a slot (690A, 690B) having a width greater than the width of the bar-shaped element (669) but smaller than the width of its extended head (667), whereby in the first, separated position, the arms of the first fork (690) of the fork-shaped element (666) located on the upper side of the head (667) are biased in the direction of the expanded head (667) and are freely movable above it without causing activation of the valve (694) with flap, doc in the second, connected position, the rod-shaped element (669) is received in the slot (690A) of the first fork (690), so that its arms are located between the extended head (667) and the valve (694) with flap allowing the closed end (679A) of the slot (690A) to move towards the rod-shaped element (669) to actuate the valve (694) with flap thanks to the movable part of the wall of the second chamber (660). 6. A method for preparing a vessel for dispensing fluid under substantially constant pressure, characterized in that the pressure vessel (10) in the form of a cylindrical can is provided with a first part (8, 108, 808) for controlling the pressure comprising a bar element (94, 194, 294, 394, 494, 594, 694, 794) for closing which is biased in the closed position and can be opened by overpressure acting on it from the outside; whereby the fluid, especially the gas, is introduced under a relatively high overpressure into the vessel (10) under pressure, and after the overpressure ceases, the element (94, 194, 294, 394, 494, 594, 694, 794) for closing is brought to the mentioned closed position, after which the second part of the device (8, 108, 808) is placed on the first part for managing the pressure, which contains the control means (58, 158, 258, 358, 458, 558, 658, 758) controlled by a control pressure driven by an element (94, 194, 294, 394, 494, 594, 694, 794) to close the bar during use against the action of said preload to the open position when there is a pressure in the vicinity of the vessel (10) which is lower than the mentioned management one pressure; after that, the vessel (10) under pressure with the first and second parts connected is inserted into the vessel (1) which is filled with the fluid to be dispensed and then closed, while the control means (58, 158, 258, 358,458, 558, 658,758) is actively functionally connected to the element (94,194,294,394,494, 594,694, 794) to close with an activation step. 7. The method according to claim 6, characterized in that the second part of the device (8, 108, 808) for pressure control is mounted in the means (117) for closing the vessel (1), and at least at it, while the first part of the device (8, 108, 808) for pressure control is mounted in the vessel (1) at a small distance from the second part, and when the vessel (1) is closed, then the second part is moved to the position for joining with the first part so that moving the other part activates the pressure control device (8, 108, 808). 8. The method according to claim 7, characterized in that the second part of the device (8, 108, 808) for pressure control is mounted in the device (16) for fluid discharge or next to it and that by moving the second part, the fluid discharge device (16) is activated, and the bar is prepared for use. 9. The method according to claim 7, indicated by the fact that before use, overpressure is temporarily created in the inner space (4, 104, 204, 304, 404, 604) of the container (1) for the active functional connection of the control means (58, 158, 258, 358, 458, 558, 658, 758) with the element (94,194,294,394,494,594,694,794) to close. 10. The method according to claim 9, characterized in that the control means (58, 158, 258, 358, 458, 558, 658, 758) is used with a second chamber (60, 160, 260, 360, 460, 660, 760, 860) which is at least partially defined by a movable part of the wall of the second chamber. (60, 160, 260, 360, 460, 660, 760, 860), while in the second chamber (60, 160, 260, 360, 460, 660, 760, 860) the control pressure is set during use, while before use, by raising the pressure in the inner space (4, 104, 204, 304, 404, 604) vessel (1) we know that the volume of the second chamber (60,160,