MXPA97002005A - Supplier for med - Google Patents

Abstract

The present invention relates to a dispensing station for supplying media during a discharge operation, comprising: a dispensing unit that includes a push-operated valve through which the means are engaged during the unloading operation, and a vetilation filter for ventilating a reservoir chamber supplying the dispensing unit with the means, wherein means are provided for connecting the supply unit together with the reservoir chamber and for subsequently tensioning the ventilation fixture.

Description

MEDIA SUPPLIER TECHNICAL FIELD AND BACKGROUND OF THE INVENTION The invention relates to a discharge device as set forth in the preamble of claim 1. This device is suitable for storing or discharging liquid, pasty, powdery and / or gaseous media respectively. Such means can be pharmaceutical, cosmetic or technical preparations, which in the application are released from the discharge device into the medium orifice. For such discharge devices, it is expedient when a chamber can be replenished with an inert filling means during operation, for example to compensate for a vacuum. One of such filling means, for example outside air, is contrary to the largely compressible non-compressible preparation. After the chamber has been partially or completely emptied, this filling means fills the empty space resulting, for example, that is extracted by the vacuum inside the chamber until the pressure has been compensated to that of the outside air. Such aeration means are thus particularly suitable for a reservoir chamber, which contains a plurality of supplied quantities of the preparation, each of which is made to exit the orifice of the medium in each discharge action by a unit of supply. For this purpose, the supply unit may contain a supply chamber separate from the storage chamber. The first then is filled from the deposit chamber after each discharge action and then closed with respect to the deposit chamber in the subsequent discharge action. As a result of this, the medium does not flow back into the reservoir chamber, on the contrary it flows to the middle orifice. For this purpose, the chamber of the medium may be pressurized, for example by its volume which is decreased and then pre-enlarged to extract in a subsequent supplied quantity from the middle of the reservoir chamber. In the reset or initial position, the path of the medium in the passage through the supply unit from an inlet to the middle orifice and including the middle chamber, is closed advantageously pressure-tight in such a way that the air he is not able to enter inside the deposit chamber or the middle chamber without him. To prevent the entry of particles and / or germs, when the chamber is aerated, a filter is provided expeditiously in the aeration path. In addition, the reservoir chamber is substantially hermetically sealed with respect to the outside atmosphere, namely by means of a seal seat between the supply unit and the reservoir unit. To secure the supply unit to the rigidly placed reservoir unit the seal surface areas of this seal seat are pressed together and held in place. For this purpose a separate, elastically compressible seal unit is positioned between the dimensionally rigid seal surface areas of the units. The aeration path is then directed through the internal or housing spaces of the supply unit, instead of being provided as a parallel path totally separate from the paths of the medium and also from the aeration paths, which serve to aerating such accommodation spaces of the dispensing unit not subjected to the medium or the conduit thereof. Accordingly, the filling means can only gain access to the chamber to be aerated by its flow through the filter. The variable volume chamber can also be formed by the reservoir chamber, for example, by a squeezable, soft bottle. The neck of which comprises the entrance of the medium that communicates permanently with the supply unit and separated from it. As a result of this, the supply unit can also remain firmly mounted on the reservoir chamber during discharge.

BRIEF DESCRIPTION OF THE INVENTION The invention is based on the object of defining a discharge device, in which the disadvantages of the known configurations or configurations of the type described are avoided and which more particularly ensure a simple configuration or assembly, for example in such a way that it is possible a highly compact filter arrangement. According to the invention, the filter unit is directly supported by the storage unit, in such a way that it is not positively defined until or after the assembly of the storage unit and the discharge device or supply unit, more particularly being fastened between the maintenance surface areas of the two units. In this arrangement the filter unit can be optionally preassembled with the supply unit forming the discharge device or with a reservoir unit for example in such a way that the filter unit is centered with respect to its axial position, while it is defined, however, in an axial direction only by axial contact with the maintenance surface area. During assembly, the filter unit then comes into contact with the second maintenance surface area and is centered with respect to the latter. Accordingly, until assembly, the choice can be made whether a filter is to be incorporated or not or what kind of filter is to be used. The filter can also be used directly to seal the neck or reservoir opening of the reservoir, such that only the aeration path remains open for flow. More particularly, the filter can be provided as the only seal for sealing the mounting space between the supply unit and the reservoir unit, thus holding the need for any other seal. The filter is located completely on the outside of the reservoir unit or delivery unit, the latter projecting into the neck and chamber of the reservoir chamber, such that this exterior side defines the reservoir space above the reservoir chamber. filter. Although the filter may be located within the tank neck, it is positioned to also completely outlive the outer side of the tank unit, which is formed expeditiously only by an integral vessel. As a result of this, the filter can be defined stressed between the front, parallel surface areas where also suitable areas, however, between the circumferential, concentric surface areas of the storage unit and the supply unit.

Without taking into account the described configuration, a filter unit can be formed of several components, for example sheet layers, one of which is configured as the filter and one as the seal, the latter being substantially thinner than the filter. The seal is impervious to the medium in the full extent of its surface area, while, however, it releases an outlet of the filter in the region of its flange, so that the air is able to flow into the reservoir chamber of the filter. this exit. Without taking into account the described configurations, it is clear to provide a filter in the form of a disc or plate through which the flow passes over most of its extension between the surface areas of the flange facing each other, separating from one another parallel to the plane of contact. the plate. At the entrance of this filter material the air is able to enter parallel and / or transversely to the plane of the plate. Accordingly, the air is also able to exit the filter material, in this case preferably only an axial outlet is provided in which the filled surface area of the associated flange is covered by the hermetically associated unit or when it is pressurized. The supply unit and the storage unit are mutually tensioned axially and / or radially after assembly with a fastening means. The latter also acts by stressing on the filter unit. This ring or fastening means in the form of a lid, it holds the units by their external circumferences and can be a screw cap, a folded ring or similar. Without taking into account the described configurations, the filter can be located without contact at least partly in an annular filter chamber located outside the storage unit and / or the supply unit and more particularly is defined by the inner side of the half fastener. For the entry of air into the filter chamber an aeration opening can pass through the fastener means. Without taking into account the described configurations, it is clear to provide in the aeration path a pressure sensitive to the opening or closing of the closure, such as a valve, the seals or valve part from which it is formed directly by the filter and in position. closed is supported by the filter. Thus, the valve can form a preassembled unit together with the filter. Preferably, the second closing seat is formed by the seal. If the part of the associated valve is bent in the form of deflection for opening and closing then it forms a throttle valve. The filter material and the seal or part of the valve may be connected together as a structure interspersed by the joint or simply a loose interleaving, such that they are not forced together until the pressure is applied. Advantageously, the filter constitutes a diaphragm filter, a germ filter or a sintered filter. The filter can be semipermeable, passing only gas and not liquid or consists in its full extension of a homogeneous filter material acting simultaneously as a seal. Due to the configuration according to the invention, the preservatives can be completely eliminated which, for example, are mixed into the medium in the tank. In addition, air can not be drawn into the chamber to be aerated through all the flow paths of the supply unit, that air flowing from the filter unit only along the outermost exposed outer surface area of the supply unit and the inner circumference of the storage unit inside the storage chamber. If the closure of the valve seat is formed by the outlet of the filter material, then the latter is also unable to come into contact with the preparation. These and other features are also apparent from the description and the drawings, each of the individual characteristics which are achieved by themselves or variously in the form of sub-combinations in one embodiment of the invention and in other fields and may represent advantageous aspects, as well as well as being patentable in its own right, for which protection is sought in the present.

BRIEF DESCRIPTION OF THE DRAWINGS The exemplary embodiments of the invention are explained in greater detail in the following and illustrated in the drawings, in which: Figure 1 is a partially sectioned view of a discharge device according to the invention, Figure 2 is a section of Figure 1 in a modified configuration shown substantially amplified.

DETAILED DESCRIPTION OF THE INVENTION The discharge device 1 according to Figures 1 and 2 is illustrated in the initial or resting position and is initially produced as a supply unit 2 ready to operate, which then can be firmly connected to the storage unit 3. A single or multi-part base unit 4 of unit 2 is connected firmly seated to unit 2 such that it projects over most of its length within the interior thereof. Positioned movably in the unit 4 is a drive unit 5 projecting from the units 3, 4 and through which the medium going to the outside flows. Securing the unit 4 as it was done by means of a fastening means 6, in this case a folded ring, which is plastically deformed during the assembly of the units 2,4 and 3. The member 5 then positively clamped by its surface portions of the front surface areas of the units 3, 4 facing each other separating from each other. Such a clamping arrangement also materializes in the case of a screw cap by means of the thread interaction flanks. The unit 4 forms a stepped hollow housing over its entire length. The cover 7 of the housing projects at its inner end inside the tank. The outer end of the cover 7 is covered by a closure, for example a cover 8. This cover can be pressure-tight by means of a snap action connector, to the outer flange of the cover. Projecting from the outer side of the cover 7 is an annular flange or annular projection 9, which may be integrally configured with the cover 7 or the cover 8 and serve to axially support the unit 4 in the surface area of the outermost flange of the unit 3. The unit 3 is in this case formed only by one projection. This projection can be completely integral, its walls are closed in the form of a seal in each operation condition except for an opening in the tank. Inserted in the opening of the reservoir is the unit 2, 3. The fastening means 6 holds the projection 9 and a projecting projection correspondingly on the outer circumference of the unit 3. The member 6 orientates the central line 10 of the units 2 to 5 in line with the center line of the deposit opening, as well as with a zero radial space. As a result of this, an annular conduit remains free between the outer circumference of the cover 7 and the inner circumference of the reservoir opening, this conduit permanently connects the opening of the reservoir to the reservoir. The fastening means 6 is illustrated on the right in Figure 1 before being shaped and on the left in Figure 1 as well as in Figure 2 after being formed. The inner circumference of the cover 7 defines a medium chamber 11, which in this case is configured as a pressure chamber or pump chamber. The supply unit 2 is a piston pump. This chamber 11 is connected in communication with an inlet conduit 12 to the reservoir chamber and by means of an outlet conduit 13 to the medium orifice. Between each conduit 12, 13 and the chamber 11 a valve is provided in each case, located entirely within the cover 7. The valves are opened in response to the drive displacement of the unit 5 and / or in response to a change in the Pressure. The inlet valve 14 opens when there is a vacuum in the chamber 11 and the outlet valve 15 opens when there is an overpressure in the chamber 11. In the case of the overpressure in the chamber 11, the valve 14 closes and when there is vacuum in chamber 11 the valve closes. As a result of these trajectories 11, 12, 13 of the means connecting the reservoir chamber to the orifices of the medium, they are always closed hermetically under pressure by at least one valve. As the valve member of the valve 14 the inlet 12 is defined by the cover 7. The valve is fully disposed on the unit 5, through which the conduit 13 passes. The unit 5 contains a piston unit 16, the piston of which is sealed by a flange slidably guided by the inner circumference of the cover 7, which defines the chamber 11 at its outer end and configured integral with the valve parts of the valve 15. The cover of the ring-shaped piston 17 is disposed on an impeller rod 18 which passes through the outer end of the housing 7, 8 A drive and discharge head (not described in greater detail) can be mounted on the outside, projecting at the end of the member 18. This drive and discharge head comprises a hole in the medium, for example an atomizing nozzle. This head forms the handle with which the unit 5, 16 can be moved inwardly against the force of a return spring, as a result of which the volume of the chamber is decreased by the piston 17. The spring is located within the chamber 11. Once a corresponding overpressure is achieved in chamber 11, piston 17 or its valve part is displaced outwardly relative to the remaining impeller rod 18 as a result of which valve 15 is open. When the pressure drops, a valve spring configured integral with the piston 17 closes the valve 15 again, closing the surface areas which then come into contact with each other. Once the driving force on the driving head is released, the unit 5, 16 is returned to its initial position by the return spring in which the unit 5, 6 is defined by the retainer with respect to the unit 4. Located behind the piston flange an annular space 19 is defined by the piston 17 and the inner circumference of the cover 7 around the axis 10. This annular space is sealed from all the paths of the medium by the piston 17 and can be connected to the piston 17. communication with the outside air by means of a space defined by the units 4, 5 at the outer end of the unit 4, resulting in the space 19 being aerated, but which is continuously sealed from the reservoir chamber and the trajectories of the means 11 to 13. In the initial position of unit 2, the aeration path for space 19 can be closed pressure-tight with respect to space 19 by a valve. Between the units 2, 3 a filter unit 20 is held in place, which may consist of a part or several parts. According to Figure 1, it has three parts or three layers and as shown in Figure 2 has two layers. The ring-shaped plate or unit 20 comprises, as its thickest layer, a flat, ring-shaped filter 21. Located in these two plate surface areas, there is in each case a thinner seal 22, 23 as a substantially complete surface cover. The facing surface areas, separating from each other of these outermost layers 22, 23 are provided as the counter-surface areas 24, 25 in contact with the maintenance surface areas 26, 27 of unit 4. The area of Maintenance surface 26 is formed by the outermost, flat end surface area of the tank neck 28, this end surface area surrounds the tank opening at right angles to the axis 10. The maintenance surface area 27 it is formed by the outermost facing surface area of the projection 7, opposite the maintenance surface area 26 and is located parallel to the surface area 26. All maintenance surface areas, the counter-surface areas and layers of the unit 20 are annular around the axis 10. The interior width of the surface areas 26, 27 is almost the same in size as that of the surface area 27 and the outer width of the surface area 26 is greater than the latter. The layers 21 to 22 project radially inward, beyond the inner width of the surface area 26, 27 to the outer circumference of the cover 7, such that they are centrally guided on the latter. The layers 21 to 23 also project beyond the outer circumference of the surface area 27 or the projection 9, but not beyond the outer circumference of the surface area 26 or the neck projection. The cover of the fastening member 6 couples this outer circumference with a centering action and thus with a zero radial space. All layers 21 to 23 are axially tensioned in common, between the surface areas 26, 27 with the seal pressure as a result of which the reservoir chamber 35 is closed pressure-tight against the exit of the medium through the path of the filter. Between the surface areas 26, 27 and between the layers 21, 23 the gas is able to flow through the layer 21, however, in the direction of the reservoir chamber 35. The outer rim and the circumferential surface area , as well as also the flange zones of the two circumferential surface areas of the layer 21 thereby form the filter inlet 31, from which the fluid flows between the circumferential surface areas and the radially inward layers, that is, by means of the entire annular circumference continuously in complete form. The inner flange and the circumferential surface area of the layers 21 to 23 may be stressed due to the axial tension when being pressed against the outer circumference of the cover 7. The plate surface area of the layer 21 facing the surface area 26 or chamber 35 is located partially free, thus forming the connection of the inner circumferential surface area to the outlet of the filter 32 axially oriented within the chamber 35. It is only through this filter outlet that the air is able to flow within the chamber 35. To form the outlet 32, the layer 22 sealed in any other way may be with doors. These doors can be formed by a toothed profile configuration of the inner circumference of the layer 22, such that the tips of these teeth are attached to the cover 7. Through the spaces between the teeth, the air is capable of enter the annular space 34 between the cover 7 and the neck 28. In any other form no air is able to exit in the circumferential surface areas of the layer 21. Each layer 21 to 23 comprises a thickness, which is constant throughout its extension in the relaxed condition. The inlet 31 or the outer circumferential region of the seal and the filter unit 20 is located outwardly completely encapsulated within a chamber 29, which is defined by the surface area 26, the outer circumference of the nose 9 and the inner side of member 6 thin wall fastener of metal sheet. The unit 20 is completely separated from the inner circumference, as well as from the inner side of the surface end wall of the member 6, the inlet 31 also has such a separation from the surface area 26. The annular filter chamber 29 is connected by means of the openings 33, directly and permanently to the outside air. These aeration openings 33 may be doors in the surface end wall of the member 6, being located between the outer circumference of the projection 9 and the cover of the member 6, such that the chamber 29 is always supplied with fresh air. The surface end wall of this member engages with a centering effect both of the facing end wall of the surface, separating from the surface area 27 and the outer circumference of the component 7, 8. The openings 33 are located, separated from the layer 21.

For mounting, the layers 21 to 23 can be mounted individually or as a unit on the cover 7 from the inner end until they connect the surface area 27 axially and the cover 7 radially substantially with zero space or clamped in place , the member 6 is also preassembled with the unit 4. The unit 4 is then introduced through the opening of the reservoir into the reservoir 3 until the surface areas 24, 26 come into contact with each other and the cover of the member 6 holds the projection of the neck as a result of which the units 2, 3 are precisely centered with respect to one another. They are then tensioned relative to one another by the pressure load of the unit 20, the flange of the folded ring 6 cover, whereby it is folded radially inwardly under the annular projection of the neck projection, in such a manner that the axial tension is permanently maintained. On the first actuation stroke of the pump 2, first the chamber 11 is ventilated by the valve 15 and the duct 13, before it is filled with the medium from the chamber 35 in the return stroke. In this arrangement, the valve 15 is closed and the valve 14 is open. Due to the vacuum supply in the chamber 35. With the valve 15 closed, this vacuum also keeps the valve 14 closed. However, the vacuum is compensated by the air subsequently extracted within the chamber 35, through the unit 20. The device operates in the same manner for each additional discharge stroke. The valve 36 for closing the aeration paths of the space 19, consists of a two-part valve. These are raised one from the other at the start of the actuation stroke to open the valve. One part of the valve is formed by an outer annular projection of the piston 17 and the other part of the valve by an annular rim on the inner circumference of the closing part 8, through which the driving rod 18 passes. In the closed position, the closing surface areas of the valve 36 come to be against each other due to the action of the return spring as a result of which also the unit 5 is defined in the initial position. In all other positions, valve 36 is open. The space 19 is continuously sealed by the piston flange with respect to the chamber 11, without air being able to enter the chamber 34, 35 through any hole in the cover 7. According to Figure 2, a valve 30 is arranged in the aeration path of the unit 20. This valve opens when there is a vacuum in the chamber 34, 35 and will always close again as soon as the pressure is compensated. The movable valve element 37 covers outlet 32 in the closed position and releases it in the open position.

The plate or part of the valve 37 in the form of a flat ring is movable within the opening of the reservoir and the annular space 34 as it is flexed elastically. In the closed position, it covers the associated plate surface area of the plate 21. Its non-movable base can be tensioned between the surface areas 26, 27 and can be attached directly to the layer 21, as well as the area of surface 26. In addition, the valve 30 may belong to the preassembled unit 2 or 20. More particularly, the valve part 27 can be configured integral with the layer 22a and formed by the inner, radial annular rim or the like. In the closed position, the inner circumference of the valve part 37 is expediently in contact with the outer circumference of the cover 7 with a total circumferential seal, while in the open position a complete circumference of the circumference is released. annular space joining the cover 7. According to Figure 2, one of the counter-surface areas, namely the counter-surface area 25a, is formed directly by the layer 21. Between the surface areas 25a, 27 a non-separate seal is provided, the seal of this space that is formed directly by the surface areas cited as a result of which, the proportion of the inlet 31 formed by the surface side of the layer 21 is substantially greater. This ratio joins the outer circumference of the projection 9 and its opposite spacing, located directly in the opening 33. The outer circumference of the disc 22a in this manner extends upward towards the outer circumference of the layer 21. The smaller inner circumferences of all layers 21 to 23 or 21, 22a may be equal in width. The pump 2 is, according to the invention, secured with a seal interposed in the reservoir container 3, this seal contains a filter unit 20 as a result of which, the reservoir chamber 35 can be replenished with filtered external air in the course of being emptied. This air is unable to flow through the interior of the pump 2. Furthermore, the filter 21 can first be selected correspondingly to meet the requirements in the assembly of the pump and the reservoir. In addition, assembly is facilitated and no separate support is needed for the filter 21. All properties and effects may be provided, precisely as described or only roughly or substantially as described. The radially outer edge surface of the filter (21) can also be located radially within the corresponding outer end surfaces of the respective surface seal members (21, 22, 22a). (27) and outgoing (9). The filter (21) can also be thinner than each of the seal members (21, 22, 22a). In the axial view, only the individual conduit (32) is of a V-shaped tip configuration, including a height V of less than 1 millimeter and a flank angle of less than 90 °, respectively of 70 °, so that the conduit (32) is symmetrical to an axial plane of the axis 10.

Claims (23)

1. A spout for supplying means during the unloading operation, characterized in that it comprises: a dispensing unit that can be mounted in a vicinity of an opening of a container in a storage unit, including a storage chamber for the means; an assortment base that defines an outermost outer base; media conduits located within the outer base, the media conduits extend from a media inlet to the media outlet separated from the media inlet, the media conduits include a media chamber, the dispenser unit that is provided for substantially closing the deposit chamber during the discharge of the media from the exit of the means; ventilation means for ventilating the reservoir chamber with ambient air; a filter unit for filtering the air, and maintenance means for securely positioning the filter unit with respect to the spout, the filter unit and the maintenance means include a counter surface to support a spout maintenance surface in contact form, wherein the maintenance means includes means for directly supporting the counter-surface on the storage unit.

2. The dispenser in accordance with the claim 1, characterized in that the support means are provided to fix in a clamped manner the filter unit between the reservoir unit and a clamping member, the dispensing unit including the clamping member.

3. The dispenser according to claim 1, characterized in that the means are provided for rigidly assembling and fixing the filter unit commonly with the dispensing unit in the storage unit and in the opening of the container that internally receives the dispensing unit.

4. The spout according to claim 1, further characterized by including an annular container end surface surrounding the container opening externally as the holding surface, wherein the filter unit includes a radially inner rim surface, a surface radially outer edge and first and second end surfaces including the countersurfaces, the support means provided to directly contact the first end surface with the end surface of the container.

5. The spout according to claim 1, characterized in that the filter unit is an annular disk circumferentially uninterrupted.

6. The dispenser in accordance with the claim 1, characterized in that the dispensing unit includes a housing directly attached to the chamber of the medium with an inner surface of the housing of a housing wall, the housing wall includes an exterior surface of the housing, the filter unit extending substantially completely outside the outer surface of the housing, means provided to axially assemble the filter unit with the dispensing unit by a snap-fit plug connection.

7. The dispenser according to claim 1, further characterized in that it includes seal means for sealing the opening of the container in seal form, in which the seal means is substantially directly connected to the filter unit.

8. The dispenser according to claim 1, characterized in that the filter unit includes a seal means for sealing the reservoir chamber and allowing ventilation of the reservoir chamber.

9. The spout according to claim 1, characterized in that the filter unit is a multi-layered component that includes a gas impervious layer operationally without filtration.

10. The dispenser according to claim 9, characterized in that the gas-impermeable layer includes the counter-surface.

11. The spout according to claim 1, characterized in that the filter unit includes a filter element located between two seal elements, the filter element that is gas permeable and the seal elements that are gas impermeable.

12. The spout according to claim 1, characterized in that the filter unit defines a filter shaft and a medium filter plane, means which are provided to radially traverse the filter unit with a ventilation flow substantially parallel to the plane. of the filter, the opposing plate surfaces that are provided to join the ventilation flow, the surfaces of the plate that are gas impermeable and oriented substantially parallel to the plane of the filter.

13. The spout according to claim 1, characterized in that the filter unit includes a ventilation duct, which includes first and second chain sections of filter duct, the first section of filter duct is oriented in a first direction of flow and the second conduit section that is oriented in a second flow direction oriented transverse to the first flow direction, the second conduit section including a vent outlet issued directly into the reservoir chamber, the first conduit section that is several times greater than the second conduit section.

14. The dispenser according to claim 1, further characterized in that it includes a ventilation duct, in which the ventilation duct externally connects the filter unit and traverses the filter unit, restriction means that are provided to restrict and expand the filter unit. ventilation duct.

15. The dispenser according to claim 14, characterized in that the restriction means are continuously variable and pressure controlled by a fluid pressure present inside the reservoir chamber.

16. He . dispenser according to claim 1, characterized in that the filter unit includes a variable vent valve from an open state to a closed state and back to the open state.

17. The spout according to claim 1, further characterized in that it includes a filter chamber that receives substantially completely the filter unit, wherein the filter unit is located radially and axially substantially, externally of the container opening and the deposit unit inside the filter chamber.

18. The dispenser according to claim 1, further characterized in that it includes a fastening member for securing the dispensing unit in the reservoir unit, the clamping member circumferentially wraps directly to the filter unit, the fastening member that allows the flow of ambient air from outside the spout inside the filter unit.

19. The spout according to claim 1, further characterized in that it includes a ventilation duct that goes from the outside of the spout through the filter unit into the reservoir chamber, in which the ventilation duct is substantially complete, Separated from the medium conduits, the dispensing unit includes most of the surfaces of the external unit directly attached, the ventilation duct from the top to the bottom of the filter unit.

20. The dispenser according to claim 1, further characterized by including an annular projecting surface for rigidly supporting the dispensing unit against the holding surface of the reservoir unit, the filter unit being axially pressed-tensioned between the projecting surface and the maintenance surface.

21. The dispenser according to claim 1, characterized in that the dispensing unit includes a pusher piston pump operable from an initial state to a state of pushing end and back to the initial state, when in the initial state the conduits of the means They are sealed in the form of a seal.

22. He . spout according to claim 1, characterized in that the filter unit includes a diaphragm filter, the filter unit is semipermeable.

23. The spout according to claim 1, characterized in that the filter unit includes a filter element made of a sintered material.