EP2762238B1 - Manual pump system for an inhaler - Google Patents

Manual pump system for an inhaler Download PDF

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Publication number
EP2762238B1
EP2762238B1 EP13195434.9A EP13195434A EP2762238B1 EP 2762238 B1 EP2762238 B1 EP 2762238B1 EP 13195434 A EP13195434 A EP 13195434A EP 2762238 B1 EP2762238 B1 EP 2762238B1
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EP
European Patent Office
Prior art keywords
pressure chamber
dispensing device
fluid
pressure
piston
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.)
Active
Application number
EP13195434.9A
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German (de)
French (fr)
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EP2762238A3 (en
EP2762238B8 (en
EP2762238A2 (en
Inventor
Ralf Bünder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aero Pump GmbH
Original Assignee
Aero Pump GmbH
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Filing date
Publication date
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Publication of EP2762238A2 publication Critical patent/EP2762238A2/en
Publication of EP2762238A3 publication Critical patent/EP2762238A3/en
Application granted granted Critical
Publication of EP2762238B1 publication Critical patent/EP2762238B1/en
Publication of EP2762238B8 publication Critical patent/EP2762238B8/en
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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
    • 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
    • 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
    • B05B11/0037—Containers
    • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
    • B05B11/0044—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means
    • B05B11/00444—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means with provision for filtering or cleaning the air flow drawn into the container
    • 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
    • B05B11/0059—Components or details allowing operation in any orientation, e.g. for discharge in inverted position
    • 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
    • B05B11/0062—Outlet valves actuated by the pressure of the fluid to be sprayed
    • B05B11/0064—Lift valves
    • 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
    • B05B11/1001—Piston pumps
    • 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
    • B05B11/105—Sealing arrangements around pump actuating stem
    • 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
    • B05B11/1043—Sealing or attachment arrangements between pump and container
    • B05B11/1046—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container
    • B05B11/1047—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container the pump being preassembled as an independent unit before being mounted on the container

Definitions

  • the invention relates to a dispensing device for fluids from a fluid container, comprising a fluid outlet for dispensing the fluid, and a pressure chamber, air flowing past the pressure chamber into the fluid container through a passage opening as a result of the actuation of the dispensing device, and wherein the pressure chamber Comprises pressure chamber housing and a piston, wherein at least two sealing lips are arranged between the piston and the pressure chamber housing.
  • Such a dispenser is out US 4,775,079 A. known.
  • This dispensing device comprises a piston, on the one axial end of which a pair of sealing lips are arranged.
  • the piston engages in a pressure chamber that has two fluid inlets.
  • a fluid inlet is for a liquid supply in a first orientation and another fluid inlet is intended for a liquid supply in a different orientation. Air flowing in after a delivery stroke is collected in an annular space and then discharged to a position where it does not come into conflict with the fluid sucked into the pressure space.
  • Another delivery device is, for example, from EP 0 861 128 known.
  • Dispensing devices of this type are used, for example, as metering pumps for pharmaceuticals or cosmetics.
  • a fluid container is usually attached to the dispensing device, so that the fluid can be dispensed through the fluid outlet, for example by a manual pumping process.
  • the fluid outlet points usually a nozzle or the like to atomize the fluid into fine droplets.
  • the delivery device is, for example, part of an inhaler.
  • the dispenser according to the EP 0 861 128 is usually a manual delivery device.
  • a predetermined amount of fluid flows into a pressure chamber. If the dispensing device is now actuated, the volume of the pressure chamber is reduced and the inlet opening to the fluid container is closed. This leads to an increase in pressure within the pressure chamber until the pressure reaches a sufficiently high value to open a pressure valve for the fluid outlet or the nozzle. A predetermined amount of the fluid is then dispensed through the nozzle under positive pressure.
  • non-airless systems air continues to flow into the fluid container after an actuation process.
  • Such systems require the addition of preservatives and / or sterile filters before the passage opening of the air into the fluid container to prevent contamination by the inflowing air.
  • non-airless systems are usually only suitable for being actuated with the fluid outlet essentially pointing upwards.
  • these systems do not have sufficient separation of the inflowing air from the pressure chamber, which can nevertheless lead to germs and / or air entering the pressure chamber.
  • the invention is therefore based on the object of making a dispensing device of the type mentioned in the introduction reliable and safe.
  • the piston will usually perform a stroke within the pressure chamber housing during the actuation of the dispensing device.
  • the piston will usually perform a stroke within the pressure chamber housing during the actuation of the dispensing device.
  • an improved separation of the inflowing air and the fluid in the pressure chamber is now achieved.
  • one of the two sealing lips temporarily sweeps over an inlet opening of the pressure chamber during the stroke of the piston.
  • the second sealing lip will continue to ensure that no inflowing air gets into the pressure chamber.
  • the invention relates in particular to the "non-airless systems" mentioned above.
  • the at least two sealing lips are arranged on a radial outside of the piston. Since the piston is usually displaced axially within the pressure chamber housing during the actuation process, an arrangement of the sealing lips on a radial outside of the piston results in a simple and reliable seal.
  • the air for pressure equalization flows through a first opening of the pressure chamber housing in the region of a first sealing lip into the fluid container. This ensures that a first sealing lip already ensures a separation of the inflowing air from the inside of the pressure chamber.
  • the pressure chamber has an inlet opening to the fluid container on a radial outside.
  • the inflowing air can be separated from the fluid flowing into the pressure chamber.
  • the fluid container can usually be emptied more completely than in systems in which the inlet opening is arranged at the axial end of the pressure chamber.
  • the inlet opening in the pressure chamber housing is arranged offset on the circumference by 180 ° relative to the passage opening. Such an arrangement of the inlet opening for the fluid and the passage opening for the inflowing air can ensure that the inflowing air does not get into the inlet opening of the pressure chamber in an undesired manner.
  • a second sealing lip sweeps over the inlet opening during the actuation of the dispensing device and closes the pressure chamber with respect to the fluid container.
  • At least one sealing lip always prevents air from penetrating into the pressure chamber during the actuation of the dispensing device.
  • the at least two sealing lips are thus to be arranged such that at least one of them is always present during the piston stroke two sealing lips ensure a secure seal of the pressure chamber against the inflowing air.
  • the first sealing lip will be arranged between the piston and the pressure chamber housing in such a way that it securely seals the pressure chamber against the inflowing air, in particular at this time.
  • the overpressure protection is in the form of a closure element and / or a predetermined breaking point, which is releases from the pressure chamber housing when a limit pressure is exceeded.
  • a closure element and / or the predetermined breaking point can be arranged, for example, as a plug at the axial end of the pressure chamber housing.
  • the pressure relief device can also be in the form of a pressure relief valve.
  • a wet filter is arranged in the fluid path between the pressure chamber and the fluid outlet.
  • a wet filter can, for example, remove impurities and particles from the fluid and at least partially prevent the ingress of germs from the outside.
  • the wet filter is a physical filter that is suitable, among other things, for removing particles from the fluid.
  • a physical filter can further reduce the risk of the fluid paths becoming blocked by impurities.
  • the wet filter has a large number of passageways.
  • a more reliable physical filtering can thus be achieved, for example.
  • wet filter is arranged in the fluid path directly in front of the fluid outlet. This ensures that the fluid is no longer contaminated after it has passed the wet filter until it reaches the fluid outlet.
  • the wet filter additionally has oligodynamic substances. If the wet filter has a large number of through threads at the same time, then oligodynamic substances can be distributed over the largest possible surface in order to increase their effectiveness.
  • an air filter in particular a physical filter, is arranged in the air path to the fluid container.
  • contaminants can be removed from the air flowing into the fluid container. This reduces the risk of fluid path clogging.
  • the air filter can also have a large number of through threads and / or oligodynamic substances. In the latter case, at least some of the germs can additionally be removed from the air flowing into the fluid container.
  • Fig. 1 First shows a dispensing device 1 comprising a push-on housing 2, a guide adapter 3 and a dispensing section 4.
  • the push-on housing 2 has a holding rib 5 with which it can snap onto a fluid container.
  • the plug-on housing 2 is here essentially cylindrical and has a radial extension 6 in the region of the holding rib 5.
  • the dispensing device 1 further comprises a pressure chamber 7.
  • the pressure chamber 7 has a pressure chamber housing 8, which is positively connected to a central section 9 of the plug-on housing 2.
  • the pressure chamber housing 8 is arranged essentially cylindrical and coaxially along the cylinder axis of the push-on housing 2.
  • a piston 11 also engages in a pressure chamber interior 10 of the pressure chamber 7.
  • the dispenser 1 is in Fig. 1 shown in a neutral position.
  • a spring 12 is arranged between the plug-on housing 2 and the guide adapter 3, which keeps the plug-on housing 2 and the guide adapter 3 at a distance in the neutral position shown.
  • the piston 11 runs centrally along the spring axis 12 and engages in the guide adapter 3.
  • the piston 11 is here essentially tubular and has openings in its end sections.
  • the piston 11 engages with a first end section 13 in the pressure chamber 7.
  • the first end section 13 comprises two sealing lips 14, 15.
  • the pressure chamber housing 8 comprises an inlet opening 16, through which fluid can flow from the fluid container into the pressure chamber interior 10 in the neutral position shown.
  • the arrangement of the inlet opening 16 on a radial outside of the pressure chamber housing 8 allows a fluid container to be emptied more completely. As little as possible of the often expensive fluid is wasted.
  • Air can therefore flow into the fluid container to equalize the pressure.
  • a circumferential gap 17 is first arranged between the push-on housing 2 and the guide adapter 3. The air first flows into the area of the spring 12. The air then reaches an air filter 18 which is in the Middle section 9 of the push-on housing 2 is arranged.
  • the air filter 18 can also be designed, for example, as a physical filter in order to prevent particles from penetrating into the fluid container. Alternatively or additionally, the air filter can comprise oligodynamic substances. In this case, the air filter also serves to reduce germs in the air flowing into the fluid container.
  • the passage opening 19 is preferably arranged only on one side of the pressure chamber housing 8. It is particularly preferred here that the inlet opening 16 is arranged on the circumference offset by 180 ° relative to the passage opening 19 in the pressure chamber housing 8. This prevents inflowing air from being sucked into the pressure chamber interior 10 through the inlet opening 16.
  • a first sealing lip 14 of the piston 11 is arranged in the area of the passage opening 19.
  • the first sealing lip 14 thus prevents air flowing in from flowing past the piston 11 into the pressure chamber interior 10.
  • the piston 11 still has at least one second sealing lip 15, which is arranged here at the axial end of the piston 11.
  • the second sealing lip 15 thus additionally ensures that the inflowing air is effectively kept away from the pressure chamber interior 10.
  • Fig. 2 now shows the dispenser 1 during the actuation process.
  • the user will simultaneously exert pressure on the guide adapter 3 and one end of the fluid container in order to compress the dispensing device 1.
  • the spring 12 is compressed and the plug-on housing 2 approaches the guide adapter 3 until both come to rest on the end.
  • the piston 11 is on one second end section 20 is positively connected to the guide adapter 3. Therefore, the piston 11 is pushed further into the pressure chamber 7 with its first end portion 13 when the dispensing device 1 is actuated.
  • the second end section 13 first covers the inlet opening 16 with the second sealing lip 15. As a result, the pressure chamber interior 10 is closed off from the fluid container.
  • the dispensing section 4 now has an overpressure piston 21 which is pressed against the guide adapter 3 on the end face by a head spring 22.
  • the fluid path from the pressure chamber interior 10 to a fluid outlet 23 is blocked by the overpressure piston 21.
  • the position of the piston 11 shown is now overpressure in the pressure chamber 7.
  • the pressure of the fluid in the pressure chamber interior 10 will therefore move the overpressure piston 21 against the force of the top spring 22 and thus establish a fluid path from the pressure chamber interior 10 to the fluid outlet 23.
  • the dispensing section 4 has a radial bore 24 for this purpose. If the pressure piston 21 is displaced far enough against the spring force of the top spring 22, the pressure piston 21 releases this radial bore 24.
  • a wet filter 25 is also arranged here, which can be designed in particular as a physical filter.
  • the wet filter 25 can continue to have oligodynamic substances. Penetration of germs from the outside can thus be at least partially avoided.
  • An embodiment of the wet filter 25 as a physical filter is particularly advantageous if the dispensing device has particularly small fluid openings, for example in the region of the fluid outlet 23 in the form of a nozzle 26.
  • the wet filter 25 has a large number of through threads. This can be achieved, for example, by a sponge-like or labyrinth-like structure of the wet filter.
  • the largest possible surface can be achieved, so that the physical filtration works as effectively as possible, and on the other hand, the effectiveness of oligodynamic substances increases.
  • the pressure chamber housing 8 has an overpressure safety device.
  • the overpressure safety device is designed as a closure element 27 in the form of a stopper. The closure element 27 is arranged at the axial end of the pressure chamber housing.
  • the overpressure protection can also be in the form of a predetermined breaking point or have such a predetermined breaking point.
  • a predetermined breaking point can also be arranged between the closure element 27 and the rest of the pressure chamber housing. A danger to the user is thus avoided in this case too.

Description

Die Erfindung betrifft eine Abgabevorrichtung für Fluide aus einem Fluidbehälter, umfassend einen Fluidausgang zur Abgabe des Fluids, und eine Druckkammer, wobei in Folge der Betätigung der Abgabevorrichtung zum Druckausgleich durch eine Durchlassöffnung Luft an der Druckkammer vorbei in den Fluidbehälter strömt, und wobei die Druckkammer ein Druckkammergehäuse und einen Kolben umfasst, wobei zwischen Kolben und Druckkammergehäuse mindestens zwei Dichtlippen angeordnet sind.The invention relates to a dispensing device for fluids from a fluid container, comprising a fluid outlet for dispensing the fluid, and a pressure chamber, air flowing past the pressure chamber into the fluid container through a passage opening as a result of the actuation of the dispensing device, and wherein the pressure chamber Comprises pressure chamber housing and a piston, wherein at least two sealing lips are arranged between the piston and the pressure chamber housing.

Eine derartige Abgabevorrichtung ist aus US 4 775 079 A bekannt. Diese Abgabevorrichtung umfasst einen Kolben, an dessen einem axialen Ende ein Paar Dichtlippen angeordnet sind. Der Kolben greift in eine Druckkammer ein, die zwei Fluideingänge aufweist. Ein Fluideingang ist für eine Flüssigkeitszufuhr in einer ersten Orientierung und ein anderer Fluideingang ist für eine Flüssigkeitszufuhr in einer anderen Orientierung vorgesehen. Nach einem Förderhub nachströmende Luft wird in einem Ringraum gesammelt und dann an eine Position abgeführt, wo sie mit dem in dem Druckraum angesaugten Fluid nicht in Konflikt kommt.Such a dispenser is out US 4,775,079 A. known. This dispensing device comprises a piston, on the one axial end of which a pair of sealing lips are arranged. The piston engages in a pressure chamber that has two fluid inlets. A fluid inlet is for a liquid supply in a first orientation and another fluid inlet is intended for a liquid supply in a different orientation. Air flowing in after a delivery stroke is collected in an annular space and then discharged to a position where it does not come into conflict with the fluid sucked into the pressure space.

Eine weitere Abgabevorrichtung ist beispielsweise aus EP 0 861 128 bekannt. Derartige Abgabevorrichtungen werden beispielsweise als Dosierpumpen für Pharmazeutika oder Kosmetika verwendet. Dabei wird üblicherweise ein Fluidbehälter an der Abgabevorrichtung befestigt, so dass beispielsweise durch einen manuellen Pumpvorgang das Fluid durch den Fluidausgang abgegeben werden kann. Der Fluidausgang weist dabei üblicherweise eine Düse oder Ähnliches auf, um das Fluid in feine Tröpfchen zu zerstäuben. Insbesondere im Falle von Pharmazeutika ist dies vorteilhaft, um ein Medikament möglichst effektiv durch die Atemwege aufnehmen zu können. Die Abgabevorrichtung ist in diesem Fall also beispielsweise Bestandteil eines Inhalators.Another delivery device is, for example, from EP 0 861 128 known. Dispensing devices of this type are used, for example, as metering pumps for pharmaceuticals or cosmetics. A fluid container is usually attached to the dispensing device, so that the fluid can be dispensed through the fluid outlet, for example by a manual pumping process. The fluid outlet points usually a nozzle or the like to atomize the fluid into fine droplets. In the case of pharmaceuticals in particular, this is advantageous in order to be able to take up a medicament as effectively as possible through the respiratory tract. In this case, the delivery device is, for example, part of an inhaler.

Die Abgabevorrichtung entsprechend der EP 0 861 128 ist dabei üblicherweise eine manuelle Abgabevorrichtung. Im unbetätigten Zustand fließt eine vorbestimmte Menge an Fluid in eine Druckkammer. Wenn nun die Abgabevorrichtung betätigt wird, wird das Volumen der Druckkammer verringert und die Einlassöffnung zum Fluidbehälter geschlossen. Dadurch kommt es zu einer Druckerhöhung innerhalb der Druckkammer, bis der Druck einen ausreichend hohen Wert erreicht, um ein Druckventil zum Fluidausgang bzw. der Düse zu öffnen. Eine vorbestimmte Menge des Fluids wird daraufhin unter Überdruck durch die Düse abgegeben.The dispenser according to the EP 0 861 128 is usually a manual delivery device. In the unactuated state, a predetermined amount of fluid flows into a pressure chamber. If the dispensing device is now actuated, the volume of the pressure chamber is reduced and the inlet opening to the fluid container is closed. This leads to an increase in pressure within the pressure chamber until the pressure reaches a sufficiently high value to open a pressure valve for the fluid outlet or the nozzle. A predetermined amount of the fluid is then dispensed through the nozzle under positive pressure.

Im Falle von so genannten "Non-airless-Systemen" fließt weiterhin Luft nach einem Betätigungsvorgang in den Fluidbehälter nach. Solche Systeme erfordern zur Verhinderung einer Verkeimung durch die nachströmende Luft die Zugabe von Konservierungsmitteln und/oder Sterilfiltern vor der Durchlassöffnung der Luft in den Fluidbehälter.In the case of so-called "non-airless systems", air continues to flow into the fluid container after an actuation process. Such systems require the addition of preservatives and / or sterile filters before the passage opening of the air into the fluid container to prevent contamination by the inflowing air.

Die bekannten "Non-airless-Systeme" sind üblicherweise nur dazu geeignet, mit dem Fluidausgang im Wesentlichen nach oben zeigend, betätigt zu werden. So weisen diese Systeme keine ausreichende Trennung der nachströmenden Luft von der Druckkammer auf, wodurch es dennoch zu einer Verkeimung und/oder zum Eintritt von Luft in die Druckkammer kommen kann.The known “non-airless systems” are usually only suitable for being actuated with the fluid outlet essentially pointing upwards. For example, these systems do not have sufficient separation of the inflowing air from the pressure chamber, which can nevertheless lead to germs and / or air entering the pressure chamber.

Der Erfindung liegt also die Aufgabe zugrunde, eine Abgabevorrichtung der eingangs genannten Art zuverlässig und sicher zu gestalten.The invention is therefore based on the object of making a dispensing device of the type mentioned in the introduction reliable and safe.

Diese Aufgabe wird bei einer Abgabevorrichtung der eingangs genannten Art dadurch gelöst, dass die Druckkammer eine Überdrucksicherung aufweist.This object is achieved in a dispensing device of the type mentioned in the introduction in that the pressure chamber has an overpressure safety device.

Durch eine Verwendung von mindestens zwei Dichtlippen zwischen Kolben und Druckkammergehäuse lässt sich zuverlässig eine Trennung der nachströmenden Luft von der Druckkammer bzw. dem in der Druckkammer befindlichen Fluid erreichen. So wird der Kolben üblicherweise während der Betätigung der Abgabevorrichtung einen Hub innerhalb des Druckkammergehäuses ausführen. Durch die Verwendung von mindestens zwei Dichtlippen zwischen Kolben und Druckkammergehäuse wird nun eine verbesserte Trennung der nachströmenden Luft und des in der Druckkammer befindlichen Fluids erreicht. Weiterhin ist es vorstellbar, dass während des Hubs des Kolbens eine der beiden Dichtlippen zeitweilig eine Einlassöffnung der Druckkammer überstreicht. Auch in diesem Fall wird die zweite Dichtlippe jedoch weiterhin dafür sorgen, dass keine nachströmende Luft in die Druckkammer gelangt. Die Erfindung betrifft dabei insbesondere die zuvor erwähnten "Non-airless-Systeme".By using at least two sealing lips between the piston and the pressure chamber housing, a separation of the inflowing air from the pressure chamber or the fluid located in the pressure chamber can be reliably achieved. Thus, the piston will usually perform a stroke within the pressure chamber housing during the actuation of the dispensing device. By using at least two sealing lips between the piston and the pressure chamber housing, an improved separation of the inflowing air and the fluid in the pressure chamber is now achieved. Furthermore, it is conceivable that one of the two sealing lips temporarily sweeps over an inlet opening of the pressure chamber during the stroke of the piston. In this case too, however, the second sealing lip will continue to ensure that no inflowing air gets into the pressure chamber. The invention relates in particular to the "non-airless systems" mentioned above.

Insbesondere bei Abgabevorrichtungen mit sehr kleinen Öffnungen kann es im Fluidweg von der Druckkammer zum Fluidausgang zu Verstopfungen kommen. Dies kann beispielsweise durch Verunreinigungen oder Verklumpungen im Fluid, aber auch durch Abrieb von Teilen des Systems zustande kommen. In einem solchen Fall wird sich während des Betätigungsvorgangs ein hoher Druck innerhalb der Druckkammer aufbauen, dieser kann jedoch nicht durch Abgabe des Fluids durch den Fluidausgang abgebaut werden. Hierbei besteht nun bei den im Stand der Technik bekannten Abgabevorrichtungen die Gefahr, dass empfindliche Teile der Abgabevorrichtungen unter dem erhöhten Druck zerbrechen. Insbesondere bei einer Verstopfung des Fluidausgangs kann es zu einer Zerstörung beispielsweise einer dort angeordneten Düse kommen. Dies birgt das Risiko, dass Bruchstücke ausgestoßen werden und in den Atemweg oder das Auge eines Anwenders geraten. Die Überdrucksicherung in der Druckkammer ermöglicht nun, diese Gefahr zu vermeiden. Übersteigt der Druck in der Druckkammer einen Grenzwert, so öffnet sich dann beispielsweise die Druckkammer gegenüber dem Fluidbehälter und der Überdruck wird abgebaut.In particular in the case of dispensing devices with very small openings, blockages can occur in the fluid path from the pressure chamber to the fluid outlet. This can be caused, for example, by contamination or clumping in the fluid, but also by abrasion of parts of the system. In such a case, a high pressure will build up within the pressure chamber during the actuation process, but this cannot be reduced by dispensing the fluid through the fluid outlet. Here, there is now a risk with the dispensing devices known in the prior art that sensitive parts of the dispensing devices break under the increased pressure. In particular, if the fluid outlet is blocked, a nozzle arranged there, for example, may be destroyed. This carries the risk that fragments are ejected and get into a user's airway or eye. The overpressure protection in the pressure chamber now makes it possible to avoid this danger. If the pressure in the pressure chamber exceeds a limit value, then for example the pressure chamber opens towards the fluid container and the excess pressure is reduced.

In einer bevorzugten Ausführungsform sind die mindestens zwei Dichtlippen an einer radialen Außenseite des Kolbens angeordnet. Da der Kolben üblicherweise innerhalb des Druckkammergehäuses während des Betätigungsvorgangs axial verschoben wird, ergibt sich durch eine Anordnung der Dichtlippen an einer radialen Außenseite des Kolbens eine einfache und zuverlässige Abdichtung.In a preferred embodiment, the at least two sealing lips are arranged on a radial outside of the piston. Since the piston is usually displaced axially within the pressure chamber housing during the actuation process, an arrangement of the sealing lips on a radial outside of the piston results in a simple and reliable seal.

Weiterhin ist es bevorzugt, wenn während der Betätigung der Abgabevorrichtung die Luft zum Druckausgleich durch eine erste Öffnung des Druckkammergehäuses im Bereich einer ersten Dichtlippe in den Fluidbehälter strömt. Damit wird sichergestellt, dass eine erste Dichtlippe bereits für eine Trennung der nachströmenden Luft vom Inneren der Druckkammer sorgt.Furthermore, it is preferred if, during the actuation of the dispensing device, the air for pressure equalization flows through a first opening of the pressure chamber housing in the region of a first sealing lip into the fluid container. This ensures that a first sealing lip already ensures a separation of the inflowing air from the inside of the pressure chamber.

Weiterhin ist es vorteilhaft, wenn die Druckkammer an einer radialen Außenseite eine Einlassöffnung zum Fluidbehälter aufweist. Durch eine Anordnung einer Einlassöffnung zum Fluidbehälter an einer radialen Außenseite der Druckkammer lässt sich einerseits die nachströmende Luft vom in die Druckkammer fließenden Fluid trennen. Andererseits kann dadurch üblicherweise der Fluidbehälter vollständiger geleert werden als bei Systemen, in denen die Einlassöffnung am axialen Ende der Druckkammer angeordnet ist.Furthermore, it is advantageous if the pressure chamber has an inlet opening to the fluid container on a radial outside. By arranging an inlet opening to the fluid container on a radial outside of the pressure chamber, the inflowing air can be separated from the fluid flowing into the pressure chamber. On the other hand, the fluid container can usually be emptied more completely than in systems in which the inlet opening is arranged at the axial end of the pressure chamber.

In einer weiteren bevorzugten Ausführungsform ist die Einlassöffnung im Druckkammergehäuse umfangseitig um 180° versetzt relativ zur Durchlassöffnung angeordnet. Durch eine solche Anordnung der Einlassöffnung für das Fluid und der Durchlassöffnung für die nachströmende Luft lässt sich sicherstellen, dass die nachströmende Luft nicht in ungewollter Weise in die Einlassöffnung der Druckkammer gerät.In a further preferred embodiment, the inlet opening in the pressure chamber housing is arranged offset on the circumference by 180 ° relative to the passage opening. Such an arrangement of the inlet opening for the fluid and the passage opening for the inflowing air can ensure that the inflowing air does not get into the inlet opening of the pressure chamber in an undesired manner.

Es ist weiterhin vorteilhaft, wenn eine zweite Dichtlippe während der Betätigung der Abgabevorrichtung die Einlassöffnung überstreicht und die Druckkammer gegenüber dem Fluidbehälter verschließt. Durch eine solche Ausgestaltung ist es möglich, auf ein gesondertes Einlassventil zwischen Fluidbehälter und Druckkammer zu verzichten. Durch die zwischen Kolben und Druckkammer angeordnete zweite Dichtlippe wird die Druckkammer somit automatisch während des Betätigungsvorgangs verschlossen.It is furthermore advantageous if a second sealing lip sweeps over the inlet opening during the actuation of the dispensing device and closes the pressure chamber with respect to the fluid container. Such a configuration makes it possible to dispense with a separate inlet valve between the fluid container and the pressure chamber. The second sealing lip arranged between the piston and the pressure chamber thus automatically closes the pressure chamber during the actuation process.

Es ist weiterhin von Vorteil, wenn während der Betätigung der Abgabevorrichtung stets mindestens eine Dichtlippe ein Eindringen von Luft in die Druckkammer verhindert. Die mindestens zwei Dichtlippen sind somit so anzuordnen, dass während des Kolbenhubs stets mindestens eine der beiden Dichtlippen für eine sichere Abdichtung der Druckkammer gegenüber der nachströmenden Luft sorgt. Beispielsweise wenn die zweite Dichtlippe die Einlassöffnung überstreicht, ist diese Dichtlippe zumindest zeitweilig nicht in der Lage, eine vollständige Abdichtung zwischen nachströmender Luft und dem in der Druckkammer befindlichen Fluid zu erreichen. Daher wird hier die erste Dichtlippe so zwischen Kolben und Druckkammergehäuse angeordnet sein, dass sie die Druckkammer insbesondere zu diesem Zeitpunkt sicher gegenüber der nachströmenden Luft abdichtet.It is furthermore advantageous if at least one sealing lip always prevents air from penetrating into the pressure chamber during the actuation of the dispensing device. The at least two sealing lips are thus to be arranged such that at least one of them is always present during the piston stroke two sealing lips ensure a secure seal of the pressure chamber against the inflowing air. For example, if the second sealing lip sweeps over the inlet opening, this sealing lip is at least temporarily unable to achieve a complete seal between the inflowing air and the fluid in the pressure chamber. Therefore, the first sealing lip will be arranged between the piston and the pressure chamber housing in such a way that it securely seals the pressure chamber against the inflowing air, in particular at this time.

Hierbei ist es weiterhin bevorzugt, wenn die Überdrucksicherung in Form eines Verschlusselementes und/oder einer Sollbruchstelle vorliegt, die sich bei Überschreiten eines Grenzdrucks aus dem Druckkammergehäuse löst. Ein Verschlusselement und/oder die Sollbruchstelle kann dabei beispielsweise als Stopfen am axialen Ende des Druckkammergehäuses angeordnet sein. Alternativ kann die Überdrucksicherung aber auch in Form eines Überdruckventils vorliegen.It is further preferred if the overpressure protection is in the form of a closure element and / or a predetermined breaking point, which is releases from the pressure chamber housing when a limit pressure is exceeded. A closure element and / or the predetermined breaking point can be arranged, for example, as a plug at the axial end of the pressure chamber housing. Alternatively, the pressure relief device can also be in the form of a pressure relief valve.

Es ist bevorzugt, wenn im Fluidweg zwischen Druckkammer und Fluidausgang ein Nassfilter angeordnet ist. Ein solcher Nassfilter kann dabei beispielsweise Verunreinigungen und Partikel aus dem Fluid entfernen und ein Eindringen von Keimen von außen zumindest teilweise verhindern.It is preferred if a wet filter is arranged in the fluid path between the pressure chamber and the fluid outlet. Such a wet filter can, for example, remove impurities and particles from the fluid and at least partially prevent the ingress of germs from the outside.

Dabei ist es weiterhin bevorzugt, wenn der Nassfilter ein physikalischer Filter ist, der unter anderem dazu geeignet ist, Partikel aus dem Fluid zu entfernen. Durch einen solchen physikalischen Filter lässt sich die Gefahr einer Verstopfung der Fluidwege durch Verunreinigungen weiter verringern.It is further preferred if the wet filter is a physical filter that is suitable, among other things, for removing particles from the fluid. Such a physical filter can further reduce the risk of the fluid paths becoming blocked by impurities.

Es ist außerdem vorteilhaft, wenn der Nassfilter eine Vielzahl an Durchgangspfaden aufweist. Somit lässt sich je nach Ausführungsform beispielsweise eine zuverlässigere physikalische Filterung erreichen.It is also advantageous if the wet filter has a large number of passageways. Depending on the embodiment, a more reliable physical filtering can thus be achieved, for example.

Es ist bevorzugt, wenn der Nassfilter im Fluidweg direkt vor dem Fluidausgang angeordnet ist. Somit lässt sich sicherstellen, dass das Fluid nach dem Passieren des Nassfilters bis zum Erreichen des Fluidausgangs nicht mehr verunreinigt wird.It is preferred if the wet filter is arranged in the fluid path directly in front of the fluid outlet. This ensures that the fluid is no longer contaminated after it has passed the wet filter until it reaches the fluid outlet.

Es ist weiterhin vorteilhaft, wenn der Nassfilter zusätzlich oligodynamische Substanzen aufweist. Weist der Nassfilter gleichzeitig eine Vielzahl an Durchgangsfaden auf, so lassen sich oligodynamischen Substanzen auf einer möglichst großen Oberfläche verteilen, um deren Wirksamkeit zu erhöhen.It is also advantageous if the wet filter additionally has oligodynamic substances. If the wet filter has a large number of through threads at the same time, then oligodynamic substances can be distributed over the largest possible surface in order to increase their effectiveness.

In einer bevorzugten Ausführungsform ist im Luftweg zum Fluidbehälter ein Luftfilter, insbesondere physikalischer Filter angeordnet. Mit einem derartigen Luftfilter lassen sich also beispielsweise Verunreinigungen aus der in den Fluidbehälter nachströmenden Luft entfernen. Somit lässt sich das Risiko einer Verstopfung der Fluidwege verringern. Der Luftfilter kann dabei ebenfalls eine Vielzahl an Durchgangsfaden und/oder oligodynamische Substanzen aufweisen. In letzterem Fall kann zusätzlich zumindest ein Teil der Keime aus der in den Fluidbehälter nachströmenden Luft entfernt werden.In a preferred embodiment, an air filter, in particular a physical filter, is arranged in the air path to the fluid container. With such an air filter, for example, contaminants can be removed from the air flowing into the fluid container. This reduces the risk of fluid path clogging. The air filter can also have a large number of through threads and / or oligodynamic substances. In the latter case, at least some of the germs can additionally be removed from the air flowing into the fluid container.

Im Folgenden werden bevorzugte Ausführungsformen der Erfindung anhand der beigefügten Figuren erläutert. Dabei zeigt

Fig. 1
eine Abgabevorrichtung für Fluide nach der Erfindung in einer unbetätigten Position,
Fig. 2
eine Abgabevorrichtung entsprechend Fig. 1 während des Betätigungsvorgangs.
Preferred embodiments of the invention are explained below with reference to the attached figures. It shows
Fig. 1
a dispenser for fluids according to the invention in an unactuated position,
Fig. 2
a delivery device accordingly Fig. 1 during the actuation process.

Fig. 1 zeigt zunächst eine Abgabevorrichtung 1 umfassend ein Aufsteckgehäuse 2, einen Führungsadapter 3 und einen Abgabeabschnitt 4. Das Aufsteckgehäuse 2 weist dabei eine Halterippe 5 auf, mit der es auf einem Fluidbehälter einrasten kann. Fig. 1 First shows a dispensing device 1 comprising a push-on housing 2, a guide adapter 3 and a dispensing section 4. The push-on housing 2 has a holding rib 5 with which it can snap onto a fluid container.

Das Aufsteckgehäuse 2 ist hier im Wesentlichen zylinderförmig ausgebildet und weist im Bereich der Halterippe 5 eine radiale Erweiterung 6 auf.The plug-on housing 2 is here essentially cylindrical and has a radial extension 6 in the region of the holding rib 5.

Die Abgabevorrichtung 1 umfasst weiterhin eine Druckkammer 7. Die Druckkammer 7 weist dabei ein Druckkammergehäuse 8 auf, das formschlüssig mit einem Mittelabschnitt 9 des Aufsteckgehäuses 2 in Verbindung steht.The dispensing device 1 further comprises a pressure chamber 7. The pressure chamber 7 has a pressure chamber housing 8, which is positively connected to a central section 9 of the plug-on housing 2.

Das Druckkammergehäuse 8 ist dabei im Wesentlichen zylinderförmig und koaxial entlang der Zylinderachse des Aufsteckgehäuses 2 angeordnet. In einen Druckkammerinnenraum 10 der Druckkammer 7 greift weiterhin ein Kolben 11 ein.The pressure chamber housing 8 is arranged essentially cylindrical and coaxially along the cylinder axis of the push-on housing 2. A piston 11 also engages in a pressure chamber interior 10 of the pressure chamber 7.

Die Abgabevorrichtung 1 ist in Fig. 1 in einer Neutralposition dargestellt. Zwischen dem Aufsteckgehäuse 2 und dem Führungsadapter 3 ist dabei eine Feder 12 angeordnet, die das Aufsteckgehäuse 2 und den Führungsadapter 3 in der dargestellten Neutralposition auf Abstand hält. Der Kolben 11 verläuft dabei zentral entlang der Federachse 12 und greift in den Führungsadapter 3 ein. Der Kolben 11 ist hier im Wesentlichen rohrförmig ausgebildet und weist in seinen Endabschnitten Öffnungen auf. Der Kolben 11 greift dabei mit einem ersten Endabschnitt 13 in die Druckkammer 7 ein. Der erste Endabschnitt 13 umfasst dabei in der vorliegenden Ausführungsform zwei Dichtlippen 14, 15. Es ist hier aber auch vorstellbar, drei oder mehr Dichtlippen 14, 15 zu verwenden.The dispenser 1 is in Fig. 1 shown in a neutral position. A spring 12 is arranged between the plug-on housing 2 and the guide adapter 3, which keeps the plug-on housing 2 and the guide adapter 3 at a distance in the neutral position shown. The piston 11 runs centrally along the spring axis 12 and engages in the guide adapter 3. The piston 11 is here essentially tubular and has openings in its end sections. The piston 11 engages with a first end section 13 in the pressure chamber 7. In the present embodiment, the first end section 13 comprises two sealing lips 14, 15. However, it is also conceivable here to use three or more sealing lips 14, 15.

Das Druckkammergehäuse 8 umfasst eine Einlassöffnung 16, durch die in der dargestellten Neutralposition Fluid aus dem Fluidbehälter in den Druckkammerinnenraum 10 einströmen kann. Die Anordnung der Einlassöffnung 16 an einer radialen Außenseite des Druckkammergehäuses 8 erlaubt es hierbei, einen Fluidbehälter vollständiger zu leeren. Somit wird möglichst wenig des oftmals teuren Fluids verschwendet.The pressure chamber housing 8 comprises an inlet opening 16, through which fluid can flow from the fluid container into the pressure chamber interior 10 in the neutral position shown. The arrangement of the inlet opening 16 on a radial outside of the pressure chamber housing 8 allows a fluid container to be emptied more completely. As little as possible of the often expensive fluid is wasted.

Wird die Abgabevorrichtung nun betätigt und somit ein Teil des Fluids aus dem Fluidbehälter abgegeben, so entsteht im Fluidbehälter ein Unterdruck. Zum Druckausgleich kann daher Luft in den Fluidbehälter einströmen. Dazu ist zunächst zwischen dem Aufsteckgehäuse 2 und dem Führungsadapter 3 ein umlaufender Spalt 17 angeordnet. Die Luft strömt zunächst in den Bereich der Feder 12. Die Luft gelangt dann an einen Luftfilter 18, der im Mittelabschnitt 9 des Aufsteckgehäuses 2 angeordnet ist. Der Luftfilter 18 kann dabei beispielsweise auch als physikalischer Filter ausgebildet sein, um ein Eindringen von Partikeln in den Fluidbehälter zu verhindern. Alternativ oder zusätzlich kann der Luftfilter oligodynamische Substanzen umfassen. Der Luftfilter dient in diesem Fall zusätzlich der Verminderung von Keimen in der in den Fluidbehälter nachströmenden Luft.If the dispensing device is now actuated and part of the fluid is thus dispensed from the fluid container, a negative pressure is created in the fluid container. Air can therefore flow into the fluid container to equalize the pressure. For this purpose, a circumferential gap 17 is first arranged between the push-on housing 2 and the guide adapter 3. The air first flows into the area of the spring 12. The air then reaches an air filter 18 which is in the Middle section 9 of the push-on housing 2 is arranged. The air filter 18 can also be designed, for example, as a physical filter in order to prevent particles from penetrating into the fluid container. Alternatively or additionally, the air filter can comprise oligodynamic substances. In this case, the air filter also serves to reduce germs in the air flowing into the fluid container.

Nachdem die Luft den Luftfilter 18 passiert hat, gelangt sie durch einen Spalt zwischen Kolben 11 und dem Mittelabschnitt 9 zu einer Durchlassöffnung 19 im Druckkammergehäuse 8. Die Durchlassöffnung 19 ist dabei vorzugsweise nur auf einer Seite des Druckkammergehäuses 8 angeordnet. Hier ist es insbesondere bevorzugt, dass die Einlassöffnung 16 umfangseitig um 180° versetzt relativ zur Durchlassöffnung 19 im Druckkammergehäuse 8 angeordnet ist. Somit lässt sich verhindern, dass nachströmende Luft durch die Einlassöffnung 16 in den Druckkammerinnenraum 10 eingesaugt wird.After the air has passed the air filter 18, it passes through a gap between the piston 11 and the central section 9 to a passage opening 19 in the pressure chamber housing 8. The passage opening 19 is preferably arranged only on one side of the pressure chamber housing 8. It is particularly preferred here that the inlet opening 16 is arranged on the circumference offset by 180 ° relative to the passage opening 19 in the pressure chamber housing 8. This prevents inflowing air from being sucked into the pressure chamber interior 10 through the inlet opening 16.

Eine erste Dichtlippe 14 des Kolbens 11 ist dabei im Bereich der Durchlassöffnung 19 angeordnet. Die erste Dichtlippe 14 verhindert somit, dass nachströmende Luft am Kolben 11 vorbei in den Druckkammerinnenraum 10 geraten kann. Der Kolben 11 weist aber weiterhin mindestens noch eine zweite Dichtlippe 15 auf, die hier am axialen Ende des Kolbens 11 angeordnet ist. Die zweite Dichtlippe 15 sorgt somit zusätzlich dafür, dass die nachströmende Luft effektiv vom Druckkammerinnenraum 10 ferngehalten wird.A first sealing lip 14 of the piston 11 is arranged in the area of the passage opening 19. The first sealing lip 14 thus prevents air flowing in from flowing past the piston 11 into the pressure chamber interior 10. However, the piston 11 still has at least one second sealing lip 15, which is arranged here at the axial end of the piston 11. The second sealing lip 15 thus additionally ensures that the inflowing air is effectively kept away from the pressure chamber interior 10.

Fig. 2 zeigt nun die Abgabevorrichtung 1 während des Betätigungsvorgangs. Der Nutzer wird hier beispielsweise gleichzeitig Druck auf den Führungsadapter 3 und ein Ende des Fluidbehälters ausüben, um die Abgabevorrichtung 1 zusammenzudrücken. Dabei wird die Feder 12 gestaucht und das Aufsteckgehäuse 2 nähert sich dem Führungsadapter 3 an, bis beide stirnseitig zur Anlage kommen. Der Kolben 11 ist an einem zweiten Endabschnitt 20 formschlüssig mit dem Führungsadapter 3 verbunden. Daher wird der Kolben 11 bei der Betätigung der Abgabevorrichtung 1 mit seinem ersten Endabschnitt 13 weiter in die Druckkammer 7 eingeschoben. Der zweite Endabschnitt 13 überstreicht dabei zunächst die Einlassöffnung 16 mit der zweiten Dichtlippe 15. In Folge dessen wird der Druckkammerinnenraum 10 gegenüber dem Fluidbehälter verschlossen. Wird die Abgabevorrichtung nun weiter zusammengedrückt, so wird der Kolben 11 weiter in die Druckkammer eingeschoben und das Volumen des Druckkammerinnenraums 10 verringert sich. Dabei erhöht sich der Druck des im Druckkammerinnenraum befindlichen Fluids immer weiter. In Fig. 2 ist nun gerade die Situation dargestellt, in der der Kolben 11 soweit wie möglich in die Druckkammer 8 eingeschoben ist. Fig. 2 now shows the dispenser 1 during the actuation process. Here, for example, the user will simultaneously exert pressure on the guide adapter 3 and one end of the fluid container in order to compress the dispensing device 1. The spring 12 is compressed and the plug-on housing 2 approaches the guide adapter 3 until both come to rest on the end. The piston 11 is on one second end section 20 is positively connected to the guide adapter 3. Therefore, the piston 11 is pushed further into the pressure chamber 7 with its first end portion 13 when the dispensing device 1 is actuated. The second end section 13 first covers the inlet opening 16 with the second sealing lip 15. As a result, the pressure chamber interior 10 is closed off from the fluid container. If the dispensing device is now compressed further, the piston 11 is pushed further into the pressure chamber and the volume of the pressure chamber interior 10 is reduced. The pressure of the fluid in the pressure chamber interior continues to increase. In Fig. 2 the situation is now shown in which the piston 11 is pushed as far as possible into the pressure chamber 8.

Der Abgabeabschnitt 4 weist nun einen Überdruckkolben 21 auf, der mit einer Kopffeder 22 stirnseitig gegen den Führungsadapter 3 gepresst wird. Dabei ist in Neutralstellung der Abgabevorrichtung der Fluidweg vom Druckkammerinnenraum 10 zu einem Fluidausgang 23 durch den Überdruckkolben 21 versperrt. In der in Fig. 2 dargestellten Position des Kolbens 11 herrscht nun ein Überdruck in der Druckkammer 7. Der Druck des sich im Druckkammerinnenraum 10 befindlichen Fluids wird daher den Überdruckkolben 21 entgegen der Kraft der Kopffeder 22 bewegen und somit einen Fluidpfad vom Druckkammerinnenraum 10 zum Fluidausgang 23 herstellen. Der Abgabeabschnitt 4 weist dazu eine radiale Bohrung 24 auf. Wird der Überdruckkolben 21 weit genug entgegen der Federkraft der Kopffeder 22 verschoben, so gibt der Überdruckkolben 21 diese radiale Bohrung 24 frei. In Folge dessen kann das Fluid aus dem Druckkammerinnenraum 10 am Überdruckkolben 21 vorbei durch die radiale Bohrung 24 zum Fluidausgang 23 gelangen. Vor dem Fluidausgang 23 ist hier weiterhin ein Nassfilter 25 angeordnet, der insbesondere als physikalischer Filter ausgebildet sein kann. Der Nassfilter 25 kann dabei weiterhin oligodynamische Substanzen aufweisen. Somit kann ein Eindringen von Keimen von außen zumindest teilweise vermieden werden.The dispensing section 4 now has an overpressure piston 21 which is pressed against the guide adapter 3 on the end face by a head spring 22. In the neutral position of the dispensing device, the fluid path from the pressure chamber interior 10 to a fluid outlet 23 is blocked by the overpressure piston 21. In the in Fig. 2 The position of the piston 11 shown is now overpressure in the pressure chamber 7. The pressure of the fluid in the pressure chamber interior 10 will therefore move the overpressure piston 21 against the force of the top spring 22 and thus establish a fluid path from the pressure chamber interior 10 to the fluid outlet 23. The dispensing section 4 has a radial bore 24 for this purpose. If the pressure piston 21 is displaced far enough against the spring force of the top spring 22, the pressure piston 21 releases this radial bore 24. As a result, the fluid can pass from the pressure chamber interior 10 past the overpressure piston 21 through the radial bore 24 to the fluid outlet 23. In front of the fluid outlet 23, a wet filter 25 is also arranged here, which can be designed in particular as a physical filter. The wet filter 25 can continue to have oligodynamic substances. Penetration of germs from the outside can thus be at least partially avoided.

Eine Ausbildung des Nassfilters 25 als physikalischer Filter ist insbesondere dann vorteilhaft, wenn die Abgabevorrichtung besonders kleine Fluidöffnungen, beispielsweise im Bereich des Fluidausgangs 23 in Form einer Düse 26, aufweist. Hierzu ist es insbesondere bevorzugt, wenn der Nassfilter 25 eine Vielzahl an Durchgangsfaden aufweist. Dies kann beispielsweise durch eine schwammartige oder labyrinthartige Struktur des Nassfilters erzielt werden. Einerseits lässt sich dadurch eine möglichst große Oberfläche erzielen, so dass die physikalische Filtration möglichst effektiv wirkt und andererseits erhöht sich auch die Wirksamkeit von oligodynamischen Substanzen.An embodiment of the wet filter 25 as a physical filter is particularly advantageous if the dispensing device has particularly small fluid openings, for example in the region of the fluid outlet 23 in the form of a nozzle 26. For this purpose, it is particularly preferred if the wet filter 25 has a large number of through threads. This can be achieved, for example, by a sponge-like or labyrinth-like structure of the wet filter. On the one hand, the largest possible surface can be achieved, so that the physical filtration works as effectively as possible, and on the other hand, the effectiveness of oligodynamic substances increases.

Sollte es trotz der zwei Dichtlippen 14, 15 sowie dem Luftfilter 18 und dem Nassfilter 25 zu einer Verstopfung eines Fluidpfades, insbesondere der Düse 26, kommen, so könnte ein Überdruck im Druckkammerinnenraum 10 während der Betätigung der Abgabevorrichtung 1 nicht durch Abgabe von Fluid abgebaut werden. Hierbei besteht die Gefahr, dass durch den Überdruck empfindliche Teile der Abgabevorrichtung beschädigt werden, und schlimmstenfalls Bruchstücke durch den Fluidausgang ausgestoßen werden. Um eine solche Gefahr möglichst gänzlich auszuschließen, weist das Druckkammergehäuse 8 eine Überdrucksicherung auf. Die Überdrucksicherung ist in dieser Ausführungsform als Verschlusselement 27 in Form eines Stopfens ausgebildet. Das Verschlusselement 27 ist dabei am axialen Ende des Druckkammergehäuses angeordnet. Sollte eine Verstopfung eines Fluidpfades in der Abgabevorrichtung vorliegen, so wird durch den andauernden Überdruck in der Druckkammer 7 das Verschlusselement 27 gelöst und somit wieder eine Verbindung zwischen dem Druckkammerinnenraum 10 und dem Fluidbehälter hergestellt. Die Überdrucksicherung kann auch in Form einer Sollbruchstelle vorliegen oder eine solche Sollbruchstelle aufweisen. So kann beispielsweise auch zwischen dem Verschlusselement 27 und dem übrigen Druckkammergehäuse eine Sollbruchstelle angeordnet sein. Eine Gefahr für den Anwender wird somit auch in diesem Fall vermieden.If, despite the two sealing lips 14, 15 and the air filter 18 and the wet filter 25, there is a blockage of a fluid path, in particular the nozzle 26, an overpressure in the pressure chamber interior 10 during the actuation of the dispensing device 1 could not be reduced by dispensing fluid , There is a risk here that the excess pressure will damage sensitive parts of the dispensing device and, in the worst case, fragments may be expelled through the fluid outlet. In order to rule out such a danger as completely as possible, the pressure chamber housing 8 has an overpressure safety device. In this embodiment, the overpressure safety device is designed as a closure element 27 in the form of a stopper. The closure element 27 is arranged at the axial end of the pressure chamber housing. If there is a blockage of a fluid path in the dispensing device, the continuous overpressure in the pressure chamber 7 releases the closure element 27 and thus a connection is again established between the pressure chamber interior 10 and the fluid container. The overpressure protection can also be in the form of a predetermined breaking point or have such a predetermined breaking point. For example, a predetermined breaking point can also be arranged between the closure element 27 and the rest of the pressure chamber housing. A danger to the user is thus avoided in this case too.

Claims (14)

  1. Dispensing device for fluids from a fluid container, comprising a fluid outlet (23) for dispensing the fluid, and a pressure chamber (7), wherein as a result of the actuation of the dispensing device (1) for pressure compensation air flows into the fluid container through a passage opening (19) past the pressure chamber (7), and wherein the pressure chamber (7) comprises a pressure chamber housing (8) and a piston (11), wherein at least two sealing lips (14, 15) are arranged between the piston (11) and the pressure chamber housing (8), characterized in that the pressure chamber (7) has an excess pressure safety device.
  2. Dispensing device according to claim 1, characterized in that the at least two sealing lips (14, 15) are arranged on a radial outer side of the piston (11).
  3. Dispensing device according to claim 1 or 2, characterized in that during the actuation of the dispensing device the air flows for pressure compensation through a passage opening (19) of the pressure chamber (8) in the region of a first sealing lip (14) into the fluid container.
  4. Dispensing device according to any of claims 1 to 3, characterized in that the pressure chamber has an inlet opening on a radial outer side between the fluid container and a pressure chamber interior (10).
  5. Dispensing device according to claim 4, characterized in that the inlet opening (16) in the pressure chamber housing (8) is arranged offset circumferentially by 180° relative to the passage opening (19).
  6. Dispensing device according to any of claims 4 or 5, characterized in that a second sealing lip (15) sweeps over the inlet opening (16) during actuation of the dispensing device (1) and closes the pressure chamber (8) with respect to the fluid container.
  7. Dispensing device according to any of claims 1 to 6, characterized in that during actuation of the dispensing device at least one sealing lip (14, 15) always prevents air from penetrating into the pressure chamber (8).
  8. Dispensing device according to any of claims 1 to 7, characterized in that the excess pressure safety device is in form of a closer element (27) and/or a predetermined breaking point which is released from the pressure chamber housing (8) when a limit pressure is exceeded.
  9. Dispensing device according to any of claims 1 to 8, characterized in that a wet filter (25) is arranged in the fluid path between the pressure chamber (7) and the fluid outlet (23).
  10. Dispensing device according to claim 9, characterized in that the wet filter (25) is a physical filter which is particularly suitable for removing particles from the fluid.
  11. Dispensing device according to claim 9 or 10, characterized in that the wet filter (25) comprises a plurality of passage paths.
  12. Dispensing device according to any of claims 9 to 11, characterized in that the wet filter (25) is arranged in the fluid path directly in front of the fluid outlet (23).
  13. Dispensing device according to any of claims 9 to 12, characterized in that the wet filter (25) additionally comprises oligodynamic substances.
  14. Dispensing device according to any of claims 1 to 13, characterized in that an air filter (18), in particular a physical filter, is arranged in the air path into the fluid container.
EP13195434.9A 2013-01-30 2013-12-03 Manual pump system for an inhaler Active EP2762238B8 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013001571.5A DE102013001571B4 (en) 2013-01-30 2013-01-30 Dispensing device for fluids from a fluid container

Publications (4)

Publication Number Publication Date
EP2762238A2 EP2762238A2 (en) 2014-08-06
EP2762238A3 EP2762238A3 (en) 2017-06-21
EP2762238B1 true EP2762238B1 (en) 2020-02-05
EP2762238B8 EP2762238B8 (en) 2020-06-17

Family

ID=49725006

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13195434.9A Active EP2762238B8 (en) 2013-01-30 2013-12-03 Manual pump system for an inhaler

Country Status (3)

Country Link
EP (1) EP2762238B8 (en)
DE (1) DE102013001571B4 (en)
ES (1) ES2786073T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL2992967T3 (en) * 2014-09-02 2020-11-30 F. Holzer Gmbh Medicament dispenser

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8526339U1 (en) * 1985-09-14 1987-05-07 Ing. Erich Pfeiffer Gmbh & Co Kg, 7760 Radolfzell, De
US4775079A (en) * 1985-11-05 1988-10-04 Hans Grothoff Upright/inverted pump sprayer
US6053368A (en) 1995-11-17 2000-04-25 Ursatec Verpackung-Gmbh Anti-contamination dispensing apparatus for fluids
DE10231749B4 (en) * 2002-07-13 2004-07-29 Aero Pump GmbH, Zerstäuberpumpen Suction-pressure pump for dispensing a liquid from a container
GB2406330B (en) * 2003-09-29 2005-12-07 Bespak Plc A dispensing apparatus
FR2934572A1 (en) * 2008-07-31 2010-02-05 Thea Lab BOTTLE FOR FLASK OF LIQUID CONDITIONING TO DISPENSE DROP GOUTTE.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2762238A3 (en) 2017-06-21
EP2762238B8 (en) 2020-06-17
DE102013001571B4 (en) 2021-02-04
ES2786073T3 (en) 2020-10-08
DE102013001571A1 (en) 2014-07-31
EP2762238A2 (en) 2014-08-06

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