EP0690750B1 - Schaumerzeugungseinheit, sowie sprühkopf und sprühdose mit einer solchen einheit - Google Patents

Schaumerzeugungseinheit, sowie sprühkopf und sprühdose mit einer solchen einheit Download PDF

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Publication number
EP0690750B1
EP0690750B1 EP94911316A EP94911316A EP0690750B1 EP 0690750 B1 EP0690750 B1 EP 0690750B1 EP 94911316 A EP94911316 A EP 94911316A EP 94911316 A EP94911316 A EP 94911316A EP 0690750 B1 EP0690750 B1 EP 0690750B1
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EP
European Patent Office
Prior art keywords
foam
valve
forming unit
aerosol
unit according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94911316A
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English (en)
French (fr)
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EP0690750A1 (de
Inventor
Edgar Ivo Maria Van Der Heijden
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Airspray International BV
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Airspray International BV
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Publication of EP0690750A1 publication Critical patent/EP0690750A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/0018—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam
    • B05B7/0025—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam with a compressed gas supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0027—Means for neutralising the actuation of the sprayer ; Means for preventing access to the sprayer actuation means
    • B05B11/0032—Manually actuated means located downstream the discharge nozzle for closing or covering it, e.g. shutters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1052—Actuation means
    • B05B11/1053—Actuation means combined with means, other than pressure, for automatically opening a valve during actuation; combined with means for automatically removing closures or covers from the discharge nozzle during actuation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2405—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle
    • B05B7/2424—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle the carried liquid and the main stream of atomising fluid being brought together downstream of the container before discharge
    • B05B7/2427—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle the carried liquid and the main stream of atomising fluid being brought together downstream of the container before discharge and a secondary stream of atomising fluid being brought together in the container or putting the carried liquid under pressure in the container

Definitions

  • the present invention relates to a foam-forming unit, in particular intended for an aerosol.
  • Foam-forming units are generally known and are used in aerosols for dispensing in foam form a large variety of products such as shaving foam, hair setting agents, cleaning agents, insulation foam etc.
  • the aerosol contains a liquid to he dispensed in foam form, and a propellant. Both constituents are mixed with each other, and a foam is formed by passing the mixture through one or more foam-forming parts.
  • the outflow aperture of the abovementioned foam-forming units is generally in the form of a spray nozzle forming part of a spray head which forms the end of the outlet channel.
  • An aerosol with a foam-forming unit is generally operated by pressing with one finger on said spray head.
  • the foam-forming unit often comprises a non-return valve, through which air can be forced into the liquid container of the aerosol.
  • foam-forming parts were to be fitted in the path of the liquid/gas mixture in such an atomizer unit, the latter could serve as a foam-forming unit, and the aerosol could thus dispense foam.
  • the outflow aperture is located in the pressure chamber, and therefore during pumping the pressure is also raised in the outlet channel which is in communication with the outflow aperture. Since residues of foam often remain in said outlet channel after foam has been dispensed, said residues will also be placed under pressure. Due to the pressure increase, the foam residues are compressed first of all, with the result that expansion occurs on a subsequent lowering of pressure during the movement of the piston in the opposite direction, and the foam residues are foamed again under the influence of the foam-forming parts present, and thus acquire a greater volume. This means that during pumping foam often passes out of the outlet channel via the outflow aperture in the pressure chamber.
  • the foam-forming unit and the hollow piston may become soiled as a result.
  • the foams formed generally form a sticky layer when they dry and can make pumping with the piston difficult, and blockage of the outflow aperture or the foam-forming parts may also occur. Since aerosol cans are operated with one finger by pressing on the spray head in which the outflow aperture is located, soiling of the outflow aperture, and thus of the spray head, is also undesirable.
  • the object of the present invention is to provide a foam-forming unit which does not have the abovementioned disadvantages.
  • a foam-forming unit in particular intended for an aerosol, at least comprising a mixing chamber, with a propellant inlet and an inlet for a liquid to be dispensed in foam form, which mixing chamber by means of a control valve provided with return means, can be placed in communication with an outlet channel opening out into an outflow aperture, one or more foam-forming parts being present in the path between the inlets and the outflow aperture, while the unit also comprises a non-return valve through which an aerosol can be placed under pressure using pressure means, during which operation the outflow aperture is in communication with the pressure means, the foam-forming unit further comprising valve means which interrupt the communication between the foam-forming parts and the environment at least in one direction while using the pressure means, which valve means can be opened when the aerosol is to be used for the dispensing of foam.
  • valve means ensures that during the pressure operation to place an aerosol under pressure, the pressure is prevented from being raised and lowered alternately at the position of the foam-forming parts. In this way it is ensured that the outflow aperture - and thus the spray head - always remains essentially free from foam residues.
  • An additional advantage which can be mentioned is that in case the valve means are opened only during the dispensing of a foam, foam residues are also prevented from drying in the outflow aperture, the outlet channel and the foam-forming parts.
  • valve means are present, to interrupt the communication between the foam forming parts and the environment at least in one direction, as it will be clear from the subsequent description of the invention, that only a pressure increase or a pressure decrease at the position of the foam forming parts does not give rise to the problems described earlier.
  • FR-A-2 206 743 discloses a foam-forming unit comprising a mixing chamber, with a propellant inlet and an inlet for a liquid to be dispensed in foam form, said mixing chamber being designed to be placed in communication with an outlet channel opening out into an outflow aperture, by means of a control valve. Further one or more foam-forming parts are present in the path between the inlets and the outflow aperture.
  • the pressure means are designed however as a separate unit also comprising the non-return valve. Said non-return valve therefore does not form a part of the foam-forming unit but of the pressure means.
  • the foam forming unit according to the present invention is one assembly which can be mounted onto an aerosol container. The problems which are overcome by the foam-forming unit according to the present inventions are not encountered with the aerosol according to FR-A- 2 206 743.
  • the present invention is not restricted to placing under pressure in the manner described in NL-A-77 05241, but also extends to foam-forming units for aerosols which can be placed under pressure by means of, for example, a cap over the foam-forming unit, which cap is in communication with pressure means.
  • liquid to be dispensed in the foam form is not limited to liquids with a low viscosity, but the meaning thereof also extends to more viscous products, or even paste-like products and powder containing products, which are to be dispensed in foam form.
  • the valve means for interrupting the communication between the foam-forming parts and the environment are preferably formed by the control valve being a non-return control valve.
  • the non-return valve for placing an aerosol under pressure is formed by the control valve.
  • control valve has multiple functions, and the number of components for the foam forming unit according to the invention is reduced. It is possible, as will be described lateron with reference to the enclosed drawings, to design the control valve as a non-return control valve, which means that when external pressure is applied to the foam forming unit, the control valve can be opened and a propellant, e.g. air, can be pressed into the unit and aerosol, on which it is mounted.
  • a propellant e.g. air
  • a separate non-return valve can be present, through which the propellant e.g. air is forced into the aerosol, however to reduce the number of components it is advantageous to use the control valve as the non-return valve through which the aerosol is pressurized.
  • control valve is a tilting valve, which advantageously can interact with a flexible cap, which forms the outlet channel and is provided with an outflow aperture.
  • the unit according to the invention has the advantage that during the pressure operation any foam residues which are present in the outlet channel past the control valve are blown back into the aerosol, while compression and expansion of foam residues are prevented from occurring at the foam-forming parts.
  • the tilting valve comprises a disc-shaped valve body and a stem part, and that the disc-shaped valve body can interact with a sealing ring.
  • said sealing ring also forms the seal of the non-return valve.
  • the seal fulfills two functions simultaneously, which means that only one seal needs to be manufactured and fitted.
  • a control valve which also functions as a non-return valve through which the aerosol can be pressurized, or that a separate return valve is present, through which the aerosol is pressurized.
  • the unit comprises a second non-return valve upstream of the control valve, seen in the intended direction of flow of foam, which has the function of connecting the outlet channel, during placing under pressure of an aerosol, directly with the interior of the aerosol, bypassing the propellant inlet and liquid intlet.
  • a third non-return valve is also present, which can be designed as a ball, to interrupt the communication between the outlet channel and the propellant inlet and liquid inlet during pressurization, to prevent the propellant to pass through said inlet.
  • a third non-return valve is also present, which can be designed as a ball, to interrupt the communication between the outlet channel and the propellant inlet and liquid inlet during pressurization, to prevent the propellant to pass through said inlet.
  • valve means for interrupting the communication between the foam forming parts and the environment at least in one direction can also be designed in many other ways and in other preferred embodiments these are present in the outlet channel downstream of the control valve, seen in the intended direction of flow of foam.
  • valve means are advantageously in the form of a rotary or slide valve in the outlet channel, which valve is connected to the control valve and provided with return means. These valve means open at the moment at which the control valve is depressed. The communication between the outlet channel and the environment is thus always interrupted when the foam-forming unit is not in use.
  • valve means can also be made independent of the control valve, in which case the valve means are then preferably in the form of a non-return valve.
  • a particularly practical embodiment of this is a ball biassed by means of a spring in a direction opposite to the intended direction of flow of foam.
  • a non-return valve is understood to mean a valve which is opened at an adjustable pressure. In other words, such a valve is always closed until the control valve is depressed and the foam-forming unit is put into operation, and the pressure of the mixture to be dispensed is sufficiently high.
  • the pressure in the aerosol becomes too low and the non-return valve closes, this is a warning to the user that the aerosol must be placed under pressure again.
  • sealing means are in the form of a rotary valve provided with return means, which valve comprises a cylindrical part which has a passage which through rotation can place the outlet channel in communication with the environment, in such a way that the rotary valve is opened when the control valve is moved.
  • the invention also provides a spray head for a foam forming unit, at least comprising a spray nozzle and a channel in communication therewith, which spray head is characterized in that it comprises valve means of the type described in one or more of the claims 9-13 for interrupting the communication between foam-forming parts and the environment at least in one direction, said foam-forming parts being present in the spray head and/or in the foam-forming unit.
  • the invention provides an aerosol, at least comprising a container placed under pressure or to be placed under pressure, and a foam-forming unit, which aerosol is characterized in that the abovementioned foam-forming unit is a foam-forming unit according to the invention.
  • Fig. 1 shows diagrammatically an atomizer unit 1 according to the prior art, which can be accommodated in an aerosol 2 by wedging it between a cap 3 and a neck 4 of the aerosol 2.
  • Such an atomizer unit is described in NL-A-77 05241.
  • the atomizer unit comprises an annular space 6 which is surrounded by a wall 5 and can serve as a first pressure chamber.
  • a spray head 7 is also present.
  • Foam-forming parts can be disposed in the spray head, in order to make the atomizer unit a foam-forming unit. Examples of such foam-forming parts are shown here as two small screens 8.
  • the outflow aperture is indicated by 9.
  • Said outflow aperture 9 is in communication with an outlet channel 10 which is present in a part 11 of the control valve and is provided with a spring 12.
  • the outlet channel 10 When the spray head 7 is depressed against the action of the spring 12, the outlet channel 10 is placed in communication with a mixing chamber 13 which is in turn in communication - by way of air supply channels 14 and liquid supply channel 15 - with the interior of the aerosol 2.
  • the liquid supply channel 15 is connected to a riser tube 16, which projects into the liquid.
  • a sealing ring 18 is present.
  • the fastening of said sealing ring to the wall 17 is indicated by 18'.
  • Said piston 19 is often made integral with a cap covering the cover 3.
  • foam is often present in the outlet channel 10 between the screens 8 and extends to before the nozzle 9.
  • the piston 19 is moved downwards in the annular space 6, a pressure increase will occur in said space and in the pressure chamber 21, which pressure increase also occurs in the outlet channel 10.
  • the foam compressed in the pressure-increasing stroke will again expand to a greater volume through the screens 8 and emerge out of the nozzle 9, with the adverse soiling consequences discussed earlier.
  • a greater volume is intended to mean a volume of foam greater than originally present before the compression, i.e. the pressure increase, stroke of the piston.
  • Fig. 2 shows a first embodiment of a foam-forming unit according to the invention, with the same pump mechanism as the atomizer unit according to Fig. 1.
  • an outside wall 23 with an annular space 24 is present, in which space a piston can be moved up and down so that an aerosol formed with the unit can be placed under pressure.
  • the foam-forming unit comprises four parts 25, 26, 27 and 28.
  • the part 25 has on the underside an aperture 29 in which an immersion tube can be fixed. This part 25 also lies closely against the inside of the wall 31 at 30.
  • the part 27 comprises a number of lobes on the outside, which lobes rest against the inside of the wall 31, in order to centre this part and to form channels 54.
  • the part 28 in this case contains four wings 32, which form a support for a spring 33.
  • the spring 33 forms the return means of a valve disc 34 of a tilting valve.
  • the valve disc 34 has a projecting stem part 35, a dish-shaped part 36 with raised edge, and a number of positioning lobes 37 which centre the valve disc by resting against the inside of the part 28.
  • the valve disc 34 lies with the raised edge of the dish-shaped part against a sealing ring 38.
  • the wall 31 is provided at the top side with a number of apertures 39, 40 and 41.
  • the stem part 35 of the valve body 34 projects through the aperture 41.
  • the aperture 40 serves to allow through foam which has formed.
  • aperture 39 with sealing ring 39 forms a non-return valve.
  • a flexible cap 42 surrounds the foam-forming unit at the top side.
  • the latter has an outflow aperture 43 and defines an outlet channel 44.
  • valve body 34 When pressure is applied to the cap at the position of 45, the valve body 34 is moved to the position indicated by dashed lines. The control valve is opened at that moment. Liquid will flow via the riser tube (not shown) through the aperture 29 and an annular space 46 into a mixing chamber 47. The annular space is formed between the outside wall of the part 26 and the inside wall of the part 25. Propellant flows, via passages 48 present in the part 25 and channels 49, 49' formed by grooves in the outer surface and the end face of the part 25, also into the mixing chamber 47, where it mixes with the liquid.
  • the mixture then flows via channels 50, 50' to a space 51.
  • the channels 50, 50' are formed by grooves in the part 26.
  • the foam formed passes via the tilting valve and the outlet channel 44 through the outflow aperture 43.
  • An aerosol container on which the unit can be mounted is placed under pressure as follows. Air is forced into the aerosol via the non-return valve 38, 39, annular spaces 53 and channels 54 and, finally, apertures 48, by moving a piston 19 of the type shown in Fig. 1 above the atomizer unit up and down in the annular space 24. Any foam residues left behind in the outlet channel 44 are also forced into the container.
  • valve means for mounting on conventional atomizer units.
  • they can also be integral with the atomizer unit, or they can be detachable. They are all suitable for the unit shown in Fig. 1, but also for other units which are placed under pressure in a similar way, i.e. in which the outflow aperture is situated in the pressure chamber during the operation of placing under pressure.
  • An example which could be given is aerosols with a quick-action coupling mechanism, in which the spray head and a part of the aerosol container itself are placed in a space which can be placed under pressure by way of the non-return valve. Similar problems will occur in this case.
  • the latter pressure operation is also suitable for the foam-forming unit shown in Fig. 2.
  • Figs. 3a and 3b show a first embodiment of a spray head according to the invention, in which a rotary valve 55 with a spring 56 as the return means is used, the rotary valve 55 comprising an operating lip 57 which interacts with said spring 56.
  • the rotary valve also comprises a passage 58 which can place the outlet channel 10 in communication with the environment when the lip 57 is depressed.
  • a suitable mode of operation can be obtained depending on the spring tension of the spring 56 and the spring tension of the spring 12 of Fig. 1.
  • the valve 55 can be opened first of all, before the channel 10 is placed in communication with the mixing chamber 13.
  • Fig. 4a and 4b show another embodiment of a spray head according to the invention, with a slide valve comprising a slide part 59 with a tapering recess 60, which slide part 59 is held in a closed position by a spring 61.
  • An operating grip 62 comprising a pin 63 which can interact with the slanting side of the recess 60 of the slide part 59, is present.
  • the operating grip 62 is also connected to the spray head 7 by means of a hinge 64.
  • the spring tension can be set in a suitable manner according to the envisaged purpose.
  • Figs. 5a and 5b show an embodiment of the spray head according to the invention with a non-return valve which consists of a diaphragm 66 which contains apertures 67 and is pressed against the spray head 7 by means of an annular part 65.
  • a non-return valve which consists of a diaphragm 66 which contains apertures 67 and is pressed against the spray head 7 by means of an annular part 65.
  • Fig. 6 shows an embodiment of the spray head with non-return valve in the form of a ball 69 which is biassed by means of a spring 68 and shuts off the outlet channel 10.
  • a spring 68 When the pressure in the outlet channel 10 from the aerosol exceeds the tension of the spring 68, the ball will be lifted slightly, with the result that foam can be dispensed.
  • Fig. 7a and 7b show a very simple embodiment of a spray head according to the invention, comprising a swing valve 70 with a lip 71, which valve can shut off the outflow aperture 9 by interacting with projections on the spray head 7.
  • the arrow A indicates how said valve opens, and the open position is indicated by dashed lines.
  • the dimensions of the lip 71 are preferably selected in such a way that in the open position the piston 21 cannot be pushed over the spray head. This is to ensure that the aerosol is not placed under pressure while the swing valve 70 is still in the open position.
  • Fig. 8 shows another embodiment of the spray head with a slide valve, in which the sliding head 7 can in fact be moved over the outlet channel 10 against the action of a spring 72 in order to place the outlet aperture 9 in communication therewith.
  • a sealing ring 73 is present around the end of the outlet channel 10.
  • the tension of the spring 72 can be selected in such a way relative to the tension of the spring 12 that during use one of the two valves is opened earlier, preferably the slide valve first of all.
  • fig. 9 shows a preferred embodiment, which is a modified version of the embodiment according to fig. 2. Therefore similar components have been designated with similar reference numerals.
  • the foam forming unit comprises again four parts, 25, 74, 75 and 76.
  • the part 76 again contains a number of wings 32, by which the spring 33 is supported, forming the return means of the valve body, comprising a disc-shaped part 36 and a stem part 35.
  • the disc-shaped part again has a raised edge, which lies against a sealing ring 77.
  • the wall 31 on the top side has a number of apertures 40 through which foam, which has been formed, can pass into the outlet channel 44 and out of the outflow aperture 43.
  • the supply of propellant and fluid is altered in this embodiment, compared with the embodiment of fig. 2 in that the part 26 is not present.
  • the liquid can flow through the riser tube 15 into the part 25 and in the upper part thereof it is mixed with propellant, which is supplied via passages 48 and channels 49, 49'. Further said mixture will flow through the aperture 78 in the part 74 and through the screen 52.
  • a second non-return valve is present, which comprises an aperture 79 and a sealing ring 80.
  • a third non-return valve is present, in the form of the ball 81.
  • the piston 19 can be moved up and down, and during the downward stroke air will be pressed into the unit via the outlet aperture 43, enters the apertures 40 and the raised edge of the disk-shaped part of the tilting valve will be lifted from the sealing ring 77. Further the ball 81, which is however not absolutely necessary, will be pressed into the channel 82 and will therefore close off the connection between the liquid and propellant inlet and the outlet. The air will then pass through the aperture 79 and will lift the ring 80 from the seat 83 and will enter the aerosol container via channels 48.
  • the channel 49' and passages 78 are not aligned, so that air supplied via the passages 49' is not directly blown into the apertures 78.
  • 2 to 10 of these channels and passages are present most preferably four channels, two passages.
  • the sealing ring 80 is biassed against the annular shoulder 83 and will also be pressed against said shoulder by the internal pressure of the aerosol.
  • the part 45 of the cap 42 is designed as a convex part instead of concave as shown in fig. 2 and 9. If a convex shape is used, this part will be compressed when dispensing foam, reducing the volume of the outlet channel 44. When dispensing is interrupted the control valve is closed and the part 45 will return to its original convex shape with a resulting volume increase of the channel 44. This volume increase sucks foam from the outlet aperture 43 into the channel 45, whereby the aperture 43 is cleaned and foam residues near the aperture 43 are removed.

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  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Nozzles (AREA)

Claims (15)

  1. Schaumerzeugungseinheit, insbesondere für eine Sprühdose, mit wenigstens einer Mischkammer (47), die einen Treibmitteleinlaß (48) und einem Einlaß (29) für eine in Schaumform auszugebende Flüssigkeit enthält, wobei die Mischkammer (47) über ein mit einer Rückflußeinrichtung versehenes Steuerventil mit einem Auslaßkanal (44) verbunden werden kann, der in eine Ausströmöffnung (43) mündet, wobei im Weg zwischen den Einlässen und der Ausströmöffnung (43) ein oder mehr schaumbildende Teile (52) vorhanden sind, wobei die Einheit außerdem ein Nichtrückflußventil (38, 39) enthält, durch das eine Sprühdose unter Verwendung einer Druckbeaufschlagungseinrichtung mit Druck beaufschlagt werden kann, wobei während dieses Vorgangs die Ausströmöffnung mit der Druckbeaufschlagungseinrichtung in Verbindung steht, wobei die Schaumerzeugungseinheit ferner Ventileinrichtungen enthält, die die Verbindung zwischen den Schaumbildungsteilen (52) und der Umgebung wenigstens in einer Richtung während der Verwendung der Druckbeaufschlagungseinrichtung unterbrechen und die geöffnet werden können, wenn die Sprühdose zum Ausgeben des Schaums verwendet werden soll.
  2. Schaumerzeugungseinheit nach Anspruch 1, dadurch gekennzeichnet, daß die Ventileinrichtungen zum Unterbrechen der Verbindung zwischen den Schaumbildungsteilen (52) und der Umgebung durch das Steuerventil, das ein Nichtrückfluß-Steuerventil ist, gebildet sind.
  3. Schaumerzeugungseinheit nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Nichtrückflußventil (38, 39), mit dem eine Sprühdose mit Druck beaufschlagt wird, durch das Steuerventil gebildet ist.
  4. Schaumerzeugungseinheit nach einem oder mehreren der Ansprüche 1―3, dadurch gekennzeichnet, daß das Steuerventil ein Kippventil (34) ist.
  5. Schaumerzeugungseinheit nach Anspruch 4, dadurch gekennzeichnet, daß das Kippventil (34) mit einer flexiblen Kappe (42) zusammenwirken kann, die den Auslaßkanal (44) bildet und mit einer Ausströmöffnung (43) versehen ist.
  6. Schaumerzeugungseinheit nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß das Kippventil einen scheibenförmigen Ventilkörper (36) und einen Schaftteil (35) enthält und daß der scheibenförmige Ventilkörper (36) mit einem Dichtungsring (38) zusammenwirken kann.
  7. Schaumerzeugungseinheit nach Anspruch 6, dadurch gekennzeichnet, daß der Dichtungsring (38) auch die Dichtung des Nichtrückflußventils (38, 39) bildet.
  8. Schaumerzeugungseinheit nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Einheit bei Betrachtung in der beabsichtigten Strömungsrichtung des Schaums stromaufseitig vom Steuerventil ein zweites Nichtrückflußventil (80, 83) enthält, das die Funktion hat, den Auslaßkanal (44) während der Druckbeaufschlagung einer Sprühdose mit dem Innenraum der Sprühdose unter Umgehung des Treibmitteleinlasses (48) und des Flüssigkeitseinlasses (29) zu verbinden.
  9. Schaumerzeugungseinheit nach Anspruch 1, dadurch gekennzeichnet, daß die Ventileinrichtung zum Unterbrechen der Verbindung zwischen den Schaumbildungsteilen (52) und der Umgebung wenigstens in einer Richtung im Auslaßkanal bei Betrachtung in der beabsichtigten Strömungsrichtung des Schaums stromabseitig vom Steuerventil vorhanden sind.
  10. Schaumerzeugungseinheit nach Anspruch 9, dadurch gekennzeichnet, daß die Ventileinrichtungen die Form eines Dreh- oder Gleitventils im Auslaßkanal (44) haben, das mit dem Steuerventil verbunden und mit einer Rückflußeinrichtung versehen ist.
  11. Schaumerzeugungseinheit nach Anspruch 9, dadurch gekennzeichnet, daß die Ventileinrichtungen die Form eines Nichtrückflußventils haben.
  12. Schaumerzeugungseinheit nach Anspruch 11, dadurch gekennzeichnet, daß das Nichtrückflußventil eine Kugel (69) ist, die mittels einer Feder (68) in einer Richtung vorbelastet ist, die der beabsichtigten Strömungsrichtung des Schaums entgegengesetzt ist.
  13. Schaumerzeugungseinheit nach Anspruch 10, dadurch gekennzeichnet, daß die Ventileinrichtungen die Form eines mit einer Rückflußeinrichtung versehenen Drehventils haben, das einen zylindrischen Teil (55) aufweist, der einen Durchlaß (58) besitzt, der durch Drehung den Auslaßkanal mit der Umgebung verbinden kann derart, daß das Drehventil geöffnet wird, wenn das Steuerventil bewegt wird.
  14. Sprühkopf für eine Schaumerzeugungseinheit, der wenigstens eine Sprühdüse und einen hiermit verbundenen Kanal enthält, dadurch gekennzeichnet, daß er eine Ventileinrichtung des Typs, wie er in einem oder mehreren der Ansprüche 9―13 beschrieben ist, enthält, um die Verbindung zwischen den Schaumbildungsteilen und der Umgebung wenigstens in einer Richtung zu unterbrechen, wobei die Schaumbildungsteile im Sprühkopf und/oder in einer Schaumerzeugungseinheit vorhanden sind.
  15. Sprühdose, das wenigstens einen Behälter enthält, der mit Druck beaufschlagt ist oder zu beaufschlagen ist, und einer Schaumerzeugungseinheit, dadurch gekennzeichnet, daß die Schaumerzeugungseinheit eine Schaumerzeugungseinheit nach einem oder mehreren der Ansprüche 1―13 ist.
EP94911316A 1993-03-23 1994-03-23 Schaumerzeugungseinheit, sowie sprühkopf und sprühdose mit einer solchen einheit Expired - Lifetime EP0690750B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL9300517A NL9300517A (nl) 1993-03-23 1993-03-23 Schuimvormingssamenstel, een daarvoor geschikte spuitkop en een spuitbus die een dergelijk samenstel omvat.
NL9300517 1993-03-23
PCT/NL1994/000064 WO1994021384A1 (en) 1993-03-23 1994-03-23 Foam-forming unit, spray head suitable therefor, and an aerosol comprising such a unit

Publications (2)

Publication Number Publication Date
EP0690750A1 EP0690750A1 (de) 1996-01-10
EP0690750B1 true EP0690750B1 (de) 1998-07-22

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EP (1) EP0690750B1 (de)
JP (1) JPH09500052A (de)
AU (1) AU6386694A (de)
BR (1) BR9406151A (de)
CA (1) CA2158953A1 (de)
DE (1) DE69411897T2 (de)
NL (1) NL9300517A (de)
WO (1) WO1994021384A1 (de)

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Publication number Priority date Publication date Assignee Title
ES2068151B1 (es) 1993-06-23 1995-11-16 Cabrera Garrido Juan Microespuma inyectable para esclerosis.
GB9912356D0 (en) 1999-05-26 1999-07-28 Btg Int Ltd Generation of microfoam
GB0028692D0 (en) 2000-11-24 2001-01-10 Btg Int Ltd Generation of therapeutic microform
US8512680B2 (en) 2001-08-08 2013-08-20 Btg International Ltd. Injectables in foam, new pharmaceutical applications
DE20209616U1 (de) 2002-06-20 2003-07-31 RPC Wiko GmbH & Co. KG, 50259 Pulheim Spenderkopf mit Sperrventil
KR20060127001A (ko) 2003-11-17 2006-12-11 비티지 인터내셔널 리미티드 치료학적 포말
US8048439B2 (en) 2003-11-17 2011-11-01 Btg International Ltd. Therapeutic foam
GB0509824D0 (en) 2005-05-13 2005-06-22 Btg Int Ltd Therapeutic foam
NL1030992C2 (nl) 2006-01-24 2007-07-26 Airspray Nv Knijpschuimvormer.
NL1030993C2 (nl) 2006-01-24 2007-07-26 Airspray Nv Knijpschuimvormer.
NL1033031C2 (nl) 2006-12-11 2008-06-12 Rexam Airspray Nv Schuimvormsamenstel, knijpschuimvormer en afgifteinrichting.
KR101838638B1 (ko) 2016-01-15 2018-03-14 주식회사 승일 락킹 구조를 구비하는 분사용기
EP4284564A1 (de) 2021-01-29 2023-12-06 Clayton Corporation Druckbehälter mit fliessfähigem produkt und nicht löslichem treibmittel

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Publication number Priority date Publication date Assignee Title
US3955720A (en) * 1972-11-15 1976-05-11 Malone David C Low pressure dispensing apparatus with air pump
CH615642A5 (en) * 1976-05-13 1980-02-15 Malte Sandgren Ab Nebuliser on a liquid container
DE3931679A1 (de) * 1989-03-24 1990-09-27 Praezisions Ventil Gmbh Spruehkopf fuer einen spruehbehaelter zur ausgabe von schaum

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DE69411897D1 (de) 1998-08-27
DE69411897T2 (de) 1999-03-25
AU6386694A (en) 1994-10-11
NL9300517A (nl) 1994-10-17
JPH09500052A (ja) 1997-01-07
CA2158953A1 (en) 1994-09-29
WO1994021384A1 (en) 1994-09-29
EP0690750A1 (de) 1996-01-10
BR9406151A (pt) 1996-01-09

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