EP3508280A1 - Application device for applying liquid media - Google Patents

Application device for applying liquid media Download PDF

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Publication number
EP3508280A1
EP3508280A1 EP18204255.6A EP18204255A EP3508280A1 EP 3508280 A1 EP3508280 A1 EP 3508280A1 EP 18204255 A EP18204255 A EP 18204255A EP 3508280 A1 EP3508280 A1 EP 3508280A1
Authority
EP
European Patent Office
Prior art keywords
piston
discharge device
opening
inlet opening
ventilation
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.)
Granted
Application number
EP18204255.6A
Other languages
German (de)
French (fr)
Other versions
EP3508280B1 (en
Inventor
Stefan Christ
Andreas Mersmann
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
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Aero Pump GmbH
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Filing date
Publication date
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Publication of EP3508280A1 publication Critical patent/EP3508280A1/en
Application granted granted Critical
Publication of EP3508280B1 publication Critical patent/EP3508280B1/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
    • B05B11/01—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
    • B05B11/1001—Piston pumps
    • B05B11/1002—Piston pumps the direction of the pressure stroke being substantially perpendicular to the major axis of 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
    • B05B11/01—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
    • B05B11/1015—Piston pumps actuated without substantial movement of the nozzle in the direction of the pressure stroke
    • 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
    • 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
    • B05B11/1066—Pump inlet valves
    • B05B11/107—Gate valves; Sliding 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
    • B05B11/0005—Components or details
    • B05B11/0062—Outlet valves actuated by the pressure of the fluid to be sprayed
    • B05B11/0064—Lift valves
    • B05B11/0067—Lift valves having a valve seat located downstream the valve element
    • 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
    • B05B11/1073—Springs
    • B05B11/1074—Springs located outside pump chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/58—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter preventing deposits, drying-out or blockage by recirculating the fluid to be sprayed from upstream of the discharge opening back to the supplying means

Definitions

  • the invention relates to a discharge device for discharging liquid media with a pump chamber having an inlet opening and at least one outlet opening, and a piston which is displaceable in the pump chamber.
  • Such a dispenser is used, for example, to deliver a dose of a medicament that is in liquid form.
  • the medium can be atomized for this purpose, for example, as with a nasal spray or a throat spray.
  • the medium of the piston which is usually connected thereto with a handle, moved in the pump chamber. This reduces the volume of the pumping chamber. As the volume is reduced, the medium is pumped out of the pumping chamber through the outlet port and ultimately discharged from the device. During a return stroke of the piston, the volume of the pump chamber is increased again. The medium can then flow through the inlet opening into the pump chamber, so that the pump chamber is filled again for the next actuating stroke of the piston.
  • the inlet opening is closed in a piston stroke in the conveying direction and released again in a return stroke.
  • the invention has for its object to enable accurate dosing of an output quantity of the medium.
  • the predetermined stroke of the piston may be relatively small.
  • the extension then enters the inlet shortly after the start of the stroke.
  • the projection enters the inlet opening, the inlet opening is immediately closed, so that no medium can be conveyed out of the pump chamber through the inlet opening.
  • the beginning of a delivery stroke is thus defined very precisely.
  • the beginning of a Delivery is clearly defined, the amount of output medium can dose relatively accurately.
  • the inlet opening has an undersize relative to a cross section of the extension.
  • the inlet opening must therefore widen slightly when the extension enters into it. However, this is usually easily possible when using plastic materials without a user having to apply greater forces here. If the inlet opening has an undersize, the moment the extension enters the inlet opening, a good seal results, which prevents medium from escaping through the inlet opening from the pump chamber.
  • the inlet opening has a sealing lip, which cooperates with the extension.
  • a sealing lip ensures a tight seal in a simple manner.
  • the at least one outlet opening is preferably connected to a pressure-controlled outlet valve, and the piston connects the outlet opening to a low-pressure area at the end of a delivery stroke.
  • a pressure-controlled outlet valve opens on exceeding a first predetermined pressure on its input side and closes when falling below a predetermined pressure on its input side.
  • the first pressure and the second pressure can be the same. But they can also be different.
  • the piston connects the exhaust port or ports to a low pressure region, the pressure at the inlet of the exhaust valve collapses and the exhaust valve closes again.
  • the piston it is preferable for the piston to have a magnification area that tapers in a direction away from the inlet opening and abuts an inner wall of the pump chamber with its largest outside diameter and has been moved away at least over part of the at least one outlet opening at the end of the delivery stroke or in one Discharge chamber of larger diameter enters, which is connected to the outlet opening.
  • the enlargement area can for example have the shape of a cone, which in turn is provided with a sealing lip in the area of its largest diameter. When the sealing lip is crossed over part of the outlet opening (s), there is communication between the outlet opening (s) and a low pressure area on the radially outside of the enlargement area.
  • the low-pressure region may, for example, be connected to the interior of a container in which the medium to be dispensed is present.
  • the magnification area may also enter a discharge chamber connected to the outlet port (s).
  • the discharge chamber has a larger diameter than the enlargement region of the piston, so that the circumference of the enlargement region no longer abuts against the inner wall of the pump chamber. Also in this way the outlet opening (s) and the low pressure area can be connected to each other.
  • the piston is guided in a housing part, wherein a ventilation gap between the piston and the housing part is formed.
  • a ventilation gap between the piston and the housing part is formed.
  • the housing part preferably forms a valve seat at an inner end of the ventilation section, against which, in an unactuated state of the piston, a valve element formed on the piston or connected to the piston rests.
  • a valve seat at an inner end of the ventilation section, against which, in an unactuated state of the piston, a valve element formed on the piston or connected to the piston rests.
  • the ventilation passage extends through a filter arrangement.
  • the filter arrangement can be formed for example by a filter matrix.
  • the filter matrix filters the incoming air for germs and prevents contamination of the system.
  • the filter matrix may also contain biologically active substances which are germicidal or germ-reducing, for example silver.
  • the ventilation path communicates with at least one ventilation opening and the inlet opening communicates with an inlet channel, the at least one ventilation opening being separated on its side remote from the ventilation section by a partition wall from the inlet channel.
  • the inlet channel is provided to direct the medium from the container to the inlet port.
  • the Ventilation opening or vents are provided to allow air to pressure equalization in the container.
  • the partition wall ensures that the incoming air does not mix directly with the liquid entering the pump chamber. The entering into the pump chamber liquid can thus be kept free of bubbles.
  • the piston has a direction of movement which is directed at an angle in the range of 60 ° to 120 °, in particular at an angle of 90 ° to an output direction of the medium.
  • a user may act on a handle which actuates the piston, the direction of action being directed perpendicular or approximately perpendicular to the dispensing direction.
  • Fig. 1 shows a discharge device 1, which is connected to a container 2.
  • the container 2 may be filled with a liquid medium to be dispensed through a dispensing nozzle 3.
  • the medium is not shown for reasons of clarity.
  • the discharge device 1 has a housing 4 which is bounced on the container 2 or otherwise secured to the container 2. Between the housing 4 and the container 2, a seal 5 is arranged.
  • a pump housing 6 is arranged, which encloses a pump chamber 7.
  • a piston 8 is arranged, which can be actuated by a handle 9 against the force of a spring 10. Upon actuation, the piston 8 is moved into the pump chamber 7 and thereby reduces the volume of the pump chamber 7.
  • the pump chamber 7 has an inlet opening 11 which communicates with an inlet channel 12.
  • the inlet channel 12 establishes a connection between the container 2 and the inlet opening 11.
  • the pump chamber has at least one outlet opening 13, which opens into an annular space 14, which is connected to an outlet channel 15.
  • the exhaust passage 15 in turn leads to a pressure-controlled exhaust valve 16.
  • the exhaust valve 16 controls the output of the medium through the exhaust port 3. It opens at a predetermined first pressure on its input side, i. in the exhaust passage 15, and closes at a predetermined second pressure in the exhaust passage 15.
  • the two pressures may be the same, but need not be.
  • the piston 8 has an extension 17, which enters the inlet opening 11 shortly after the start of a movement in the direction of the inlet opening 11.
  • a movement of the piston 8 from his in Fig. 2 shown unactivated or resting position out is hereinafter referred to as "delivery stroke".
  • the extension 17 of the piston 8 thus closes the inlet opening 11 shortly after the start of the delivery stroke.
  • a gap between the extension 17 and the Inlet opening 11 available.
  • the inlet opening 11 is slightly smaller than the cross section of the extension 17, ie the inlet opening 11 has an undersize relative to the cross section of the extension 17.
  • the inlet opening 16 is provided with a sealing lip 18.
  • the sealing lip 18 settles in a movement of the extension 17 into the inlet opening 11 in sealingly against the extension 17. With the entry of the extension 17 into the inlet opening 11 results in a clearly defined closing of the inlet opening 11 and thus a clearly defined time at which upon further movement of the piston 8 into the pump chamber 7 in a promotion of the medium located in the pump chamber 7 through the Outlet opening 13 also begins.
  • the piston 8 has a magnification area 19 that tapers in a direction away from the inlet port 11. Simplified, the enlargement region 19 can also be referred to as a "cone", although a conical shape is not mandatory.
  • the enlargement region lies with its largest diameter 20 against an inner wall 21 of the pump chamber 7. At the end of the delivery ( Fig. 3 ), the largest diameter 20 enters a discharge chamber 22, which has a larger diameter than the pump chamber 7 and which is connected to the outlet opening 13 or the outlet openings. At this moment, the largest diameter 20 is no longer on the inner wall of the pump chamber 7, so that there is a connection between the outlet opening 13 and a low pressure area.
  • the largest diameter 20 at least partially exposes the outlet opening 13, ie the enlargement area is at least over the outlet opening 13 partially moved away. Also by the outlet opening 13 is connected to the low pressure area. The pressure in the outlet channel 15 thus drops abruptly to the pressure in the low pressure range. The exhaust valve 16 closes. Since the closing pressure of the outlet valve 16 and thus the closing time of the position of the piston 8 in the pumping chamber 7 is determined, the volume of the medium discharged through the outlet port 3 can be metered very accurately.
  • the low-pressure region comprises at least one ventilation opening 23 in the pump chamber housing 6, which communicates with a ventilation channel 24 in the housing 4.
  • This pressure is significantly lower than a prevailing during the delivery stroke of the piston 8 in the pump chamber 7 pressure.
  • a negative pressure is created in the pump chamber 7, so that when a gap has again formed between the extension 17 and the sealing lip 18, medium from the container 2 through the inlet channel 12 and the inlet opening 11 into the Pump chamber 7 can get.
  • a ventilation line 25 between the piston 8 and a housing part 26, in which the piston is mounted is provided.
  • the ventilation section 25 is the only connection between the interior of the container 2 and the environment.
  • a filter assembly 28 surrounds the piston 8. Accordingly, the ventilation path 25 passes through the filter assembly 28 therethrough.
  • the housing part 26 has at the end of the ventilation section 25, which faces the inlet opening 11, a valve seat 27 on which in an unactuated state of the piston 8 is formed on the piston 8 formed or connected to the piston 8 valve member.
  • the valve element is formed by a region of the diameter enlargement 19 facing away from the inlet opening 11. In the unactuated state of the piston 8 so no more air enters the container 2, so that the risk of contamination of the contents of the container 2 is kept small. Furthermore, the system prevents the increase in diameter 19 on the valve seat 27, that liquid from the container 2 can escape to the outside.
  • the ventilation opening 23 or the ventilation openings and the inlet channel 12 are separated on the side facing the container 2 of the housing 4 with a partition wall 29 from each other. Air that enters the discharge device 1 through the ventilation section 25, therefore, can not mix with the liquid medium, which is present at the inlet channel 12 and will soon be sucked into the pump chamber 7. This allows a bubble-free filling of the pump chamber 7 can be achieved.
  • a closure slide 30 is provided, which can be pushed under a lower edge 31 of the handle 9 to prevent actuation of the handle 9.
  • the blocking of the handle 9 is reversible.
  • the discharge device may further comprise an outer sleeve 32, which holds a head 33 on the housing 4.
  • the discharge device is particularly suitable for an over-head delivery of the medium from the container 2, so for a situation in which Container 2 is arranged in the direction of gravity above the support device 1.
  • the piston 8 is arranged transversely to an output direction of the medium and movable, i. the piston 8 closes with an output device at an angle in the range of 60 ° to 120 °, preferably about 90 °.

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  • Details Of Reciprocating Pumps (AREA)

Abstract

Es wird eine Austragvorrichtung (1) zum Austragen von flüssigen Medien beschrieben mit einer Pumpenkammer (7), die eine Einlassöffnung (11) und eine Auslassöffnung (13) aufweist, und einem Kolben (8), der in der Pumpenkammer (7) verschiebbar ist.A discharge device (1) for discharging liquid media is described with a pump chamber (7) having an inlet opening (11) and an outlet opening (13) and a piston (8) which is displaceable in the pump chamber (7) ,

Man möchte die Ausgabe eines Mediums durch die Austragvorrichtung mit hoher Genauigkeit dosieren können.One would like to be able to dose the output of a medium through the discharge with high accuracy.

Hierzu weist der Kolben (8) einen Fortsatz (17) auf, der nach einem vorbestimmten Hub des Kolbens (8) in die Einlassöffnung (11) eintritt.

Figure imgaf001
For this purpose, the piston (8) has an extension (17) which enters the inlet opening (11) after a predetermined stroke of the piston (8).
Figure imgaf001

Description

Die Erfindung betrifft eine Austragvorrichtung zum Austragen von flüssigen Medien mit einer Pumpenkammer, die eine Einlassöffnung und mindestens eine Auslassöffnung aufweist, und einem Kolben, der in der Pumpenkammer verschiebbar ist.The invention relates to a discharge device for discharging liquid media with a pump chamber having an inlet opening and at least one outlet opening, and a piston which is displaceable in the pump chamber.

Eine derartige Austragvorrichtung wird beispielsweise verwendet, um eine Dosis eines Medikaments, das in flüssiger Form vorliegt, auszutragen. Das Medium kann hierzu beispielsweise zerstäubt werden, wie bei einem Nasenspray oder einem Rachenspray.Such a dispenser is used, for example, to deliver a dose of a medicament that is in liquid form. The medium can be atomized for this purpose, for example, as with a nasal spray or a throat spray.

Zum Austragen des Mediums wird der Kolben, der hierzu in der Regel mit einer Handhabe verbunden ist, in der Pumpenkammer verschoben. Dadurch wird das Volumen der Pumpenkammer verkleinert.In dem Maße, wie das Volumen verkleinert wird, wird das Medium aus der Pumpenkammer durch die Auslassöffnung herausgefördert und letztendlich aus der Vorrichtung ausgegeben. Bei einem Rückhub des Kolbens wird das Volumen der Pumpenkammer wieder vergrößert. Das Medium kann dann durch die Einlassöffnung in die Pumpenkammer einströmen, so dass die Pumpenkammer für den nächsten Betätigungshub des Kolbens wieder gefüllt ist.To discharge the medium of the piston, which is usually connected thereto with a handle, moved in the pump chamber. This reduces the volume of the pumping chamber. As the volume is reduced, the medium is pumped out of the pumping chamber through the outlet port and ultimately discharged from the device. During a return stroke of the piston, the volume of the pump chamber is increased again. The medium can then flow through the inlet opening into the pump chamber, so that the pump chamber is filled again for the next actuating stroke of the piston.

Es ist bekannt, die Einlassöffnung in einer Seitenwand der Pumpenkammer anzuordnen. In diesem Fall wird die Einlassöffnung bei einem Kolbenhub in Förderrichtung verschlossen und bei einem Rückhub wieder freigegeben.It is known to arrange the inlet opening in a side wall of the pump chamber. In this case, the inlet opening is closed in a piston stroke in the conveying direction and released again in a return stroke.

In vielen Fällen möchte man mit der Austragvorrichtung eine möglichst genau dosierte Menge des Mediums ausgeben können.In many cases, you want to spend the most accurate metered amount of the medium with the discharge.

Dementsprechend liegt der Erfindung die Aufgabe zugrunde, eine genaue Dosierung einer Ausgabemenge des Mediums zu ermöglichen.Accordingly, the invention has for its object to enable accurate dosing of an output quantity of the medium.

Diese Aufgabe wird bei einer Austragvorrichtung der eingangs genannten Art dadurch gelöst, dass der Kolben einen Fortsatz aufweist, der nach einem vorbestimmten Hub des Kolbens in die Einlassöffnung eintritt.This object is achieved in a discharge device of the type mentioned above in that the piston has an extension which enters the inlet opening after a predetermined stroke of the piston.

Der vorbestimmte Hub des Kolbens kann relativ klein sein. Der Fortsatz tritt dann bereits kurz nach Beginn des Hubs in die Einlassöffnung ein. Wenn der Fortsatz in die Einlassöffnung eintritt, wird die Einlassöffnung unmittelbar verschlossen, so dass kein Medium durch die Einlassöffnung aus der Pumpenkammer herausgefördert werden kann. Der Beginn eines Förderhubes wird damit sehr präzise definiert. Wenn der Beginn eines Förderhubes klar definiert ist, lässt sich die Menge des ausgegebenen Mediums relativ genau dosieren.The predetermined stroke of the piston may be relatively small. The extension then enters the inlet shortly after the start of the stroke. When the projection enters the inlet opening, the inlet opening is immediately closed, so that no medium can be conveyed out of the pump chamber through the inlet opening. The beginning of a delivery stroke is thus defined very precisely. When the beginning of a Delivery is clearly defined, the amount of output medium can dose relatively accurately.

Hierbei ist bevorzugt, dass die Einlassöffnung gegenüber einem Querschnitt des Fortsatzes ein Untermaß aufweist. Die Einlassöffnung muss sich also geringfügig aufweiten, wenn der Fortsatz in sie eintritt. Dies ist aber bei der Verwendung von Kunststoffmaterialien in der Regel problemlos möglich, ohne dass ein Benutzer hier größere Kräfte aufzubringen hätte. Wenn die Einlassöffnung ein Untermaß aufweist, ergibt sich in dem Augenblick, in dem der Fortsatz in die Einlassöffnung eintritt, eine gute Abdichtung, mit der verhindert wird, dass Medium durch die Einlassöffnung aus der Pumpenkammer austreten kann.In this case, it is preferred that the inlet opening has an undersize relative to a cross section of the extension. The inlet opening must therefore widen slightly when the extension enters into it. However, this is usually easily possible when using plastic materials without a user having to apply greater forces here. If the inlet opening has an undersize, the moment the extension enters the inlet opening, a good seal results, which prevents medium from escaping through the inlet opening from the pump chamber.

Vorzugsweise weist die Einlassöffnung eine Dichtlippe auf, die mit dem Fortsatz zusammenwirkt. Eine Dichtlippe stellt auf einfache Weise eine Dichtigkeit sicher.Preferably, the inlet opening has a sealing lip, which cooperates with the extension. A sealing lip ensures a tight seal in a simple manner.

Vorzugsweise ist die mindestens eine Auslassöffnung mit einem druckgesteuerten Auslassventil verbunden und der Kolben verbindet am Ende eines Förderhubs die Auslassöffnung mit einem Niederdruckbereich. Ein druckgesteuertes Auslassventil öffnet bei Überschreiten eines ersten vorbestimmten Drucks auf seiner Eingangsseite und schließt bei Unterschreiten eines vorbestimmten Drucks auf seine Eingangsseite. Der erste Druck und der zweite Druck können gleich sein. Sie können aber auch unterschiedlich sein. Wenn der Kolben am Ende des Förderhubs die Auslassöffnung oder die Auslassöffnungen mit einem Niederdruckbereich verbindet, dann bricht der Druck am Eingang des Auslassventils zusammen und das Auslassventil schließt wieder. Somit ist sowohl der Beginn als auch das Ende der Ausgabe des Mediums klar definiert, so dass man eine sehr präzise Dosierung der Menge des Mediums erreichen kann.The at least one outlet opening is preferably connected to a pressure-controlled outlet valve, and the piston connects the outlet opening to a low-pressure area at the end of a delivery stroke. A pressure-controlled outlet valve opens on exceeding a first predetermined pressure on its input side and closes when falling below a predetermined pressure on its input side. The first pressure and the second pressure can be the same. But they can also be different. At the end of the delivery stroke, when the piston connects the exhaust port or ports to a low pressure region, the pressure at the inlet of the exhaust valve collapses and the exhaust valve closes again. Thus, both the beginning and the end of the output of the medium are clearly defined, so that one can achieve a very precise dosage of the amount of medium.

Hierbei ist bevorzugt, dass der Kolben einen sich in eine Richtung von der Einlassöffnung weg verjüngenden Vergrößerungsbereich aufweist, der mit seinem größten Außendurchmesser an einer Innenwand der Pumpenkammer anliegt und am Ende des Förderhubs zumindest über einen Teil der mindestens einen Auslassöffnung hinwegbewegt worden ist oder in einer Entladungskammer größeren Durchmessers eintritt, die mit der Auslassöffnung verbunden ist. Der Vergrößerungsbereich kann beispielsweise die Form eines Kegels haben, der im Bereich seines größten Durchmessers wiederum mit einer Dichtlippe versehen ist. Wenn die Dichtlippe über einen Teil der Auslassöffnung(en) hinweggestrichen ist, gibt es auf der radialen Außenseite des Vergrößerungsbereichs eine Verbindung zwischen der oder den Auslassöffnungen und einem Niederdruckbereich. Der Niederdruckbereich kann beispielsweise mit dem Inneren eines Behälters verbunden sein, in dem das auszugebende Medium vorhanden ist. Alternativ dazu kann der Vergrößerungsbereich auch in eine Entladungskammer eintreten, die mit der oder den Auslassöffnungen verbunden ist. Die Entladungskammer weist einen größeren Durchmesser auf als der Vergrößerungsbereich des Kolbens, so dass der Umfang des Vergrößerungsbereichs nicht mehr an der Innenwand der Pumpenkammer anliegt. Auch auf diese Weise können die Auslassöffnung(en) und der Niederdruckbereich miteinander verbunden werden.In this case, it is preferable for the piston to have a magnification area that tapers in a direction away from the inlet opening and abuts an inner wall of the pump chamber with its largest outside diameter and has been moved away at least over part of the at least one outlet opening at the end of the delivery stroke or in one Discharge chamber of larger diameter enters, which is connected to the outlet opening. The enlargement area can for example have the shape of a cone, which in turn is provided with a sealing lip in the area of its largest diameter. When the sealing lip is crossed over part of the outlet opening (s), there is communication between the outlet opening (s) and a low pressure area on the radially outside of the enlargement area. The low-pressure region may, for example, be connected to the interior of a container in which the medium to be dispensed is present. Alternatively, the magnification area may also enter a discharge chamber connected to the outlet port (s). The discharge chamber has a larger diameter than the enlargement region of the piston, so that the circumference of the enlargement region no longer abuts against the inner wall of the pump chamber. Also in this way the outlet opening (s) and the low pressure area can be connected to each other.

Vorzugsweise ist der Kolben in einem Gehäuseteil geführt, wobei eine Belüftungsstrecke zwischen dem Kolben und dem Gehäuseteil ausgebildet ist. Wenn das Medium aus der Pumpenkammer herausgefördert worden ist und ein neues Medium aus dem Behälter in die Pumpenkammer gesaugt wird, entsteht in dem Behälter ein Unterdruck, der ausgeglichen werden muss. Hierzu kann Luft durch die Belüftungsstrecke zwischen dem Kolben und dem Gehäuseteil in den Behälter eintreten. Die Belüftungsstrecke zwischen dem Kolben und dem Gehäuseteil ist im vorliegenden Fall die einzige Belüftungsstrecke. Ansonsten ist die Austragvorrichtung luftdicht ausgebildet. Durch die Verwendung einer einzigen Belüftungsstrecke lässt sich der Luftstrom, der zum Druckausgleich verwendet wird, relativ genau kontrollieren.Preferably, the piston is guided in a housing part, wherein a ventilation gap between the piston and the housing part is formed. When the medium has been conveyed out of the pumping chamber and a new medium is sucked from the container into the pumping chamber, a negative pressure arises in the container, which must be compensated. For this purpose, air can enter through the ventilation gap between the piston and the housing part in the container. The ventilation gap between the piston and the housing part is in this case the only ventilation path. Otherwise, the discharge device is airtight educated. By using a single venting section, the airflow used to equalize the pressure can be controlled relatively accurately.

Vorzugsweise bildet der Gehäuseteil an einem inneren Ende der Belüftungsstrecke einen Ventilsitz, an dem in einem unbetätigten Zustand des Kolbens ein am Kolben ausgebildetes oder mit dem Kolben verbundenes Ventilelement anliegt. Wenn der Kolben also im unbetätigten Zustand ist, in dem die Pumpenkammer ihr größtes Volumen hat, ist die Belüftungsstrecke verschlossen. Dies hat zwei Auswirkungen. Zum einen kann keine Luft mehr in den Behälter, mit dem die Austragvorrichtung verbunden ist, eintreten. Damit wird das Risiko einer Kontamination des Inhalts des Behälters kleingehalten. Zum anderen ist auch eine Sperre vorhanden, die dagegen sichert, dass Medium aus dem Behälter durch die Austragvorrichtung austritt. Dies ist insbesondere dann von Vorteil, wenn die Austragvorrichtung für eine "über Kopf" Ausgabe vorgesehen ist, bei der sich der Behälter in Schwerkraftrichtung über der Austragvorrichtung befindet.The housing part preferably forms a valve seat at an inner end of the ventilation section, against which, in an unactuated state of the piston, a valve element formed on the piston or connected to the piston rests. Thus, when the piston is in the unactuated state, in which the pump chamber has its largest volume, the ventilation section is closed. This has two effects. Firstly, no more air can enter the container to which the discharge device is connected. This minimizes the risk of contamination of the contents of the container. On the other hand, there is also a barrier which, on the other hand, ensures that medium escapes from the container through the discharge device. This is particularly advantageous if the discharge device is provided for an "overhead" output, in which the container is in the direction of gravity over the discharge device.

Vorzugsweise verläuft die Belüftungsstrecke durch eine Filteranordnung hindurch. Die Filteranordnung kann beispielsweise durch eine Filtermatrix gebildet sein. Die Filtermatrix filtert die eintretende Luft hinsichtlich Keimen und verhindert eine Kontamination des Systems. Die Filtermatrix kann auch biologisch aktive Substanzen enthalten, die keimtötend oder keimverringernd wirken, beispielsweise Silber.Preferably, the ventilation passage extends through a filter arrangement. The filter arrangement can be formed for example by a filter matrix. The filter matrix filters the incoming air for germs and prevents contamination of the system. The filter matrix may also contain biologically active substances which are germicidal or germ-reducing, for example silver.

Vorzugsweise steht die Belüftungsstrecke mit mindestens einer Belüftungsöffnung in Verbindung und die Einlassöffnung steht mit einem Einlasskanal in Verbindung, wobei die mindestens eine Belüftungsöffnung auf ihrer von der Belüftungsstrecke abgewandten Seite durch eine Trennwand vom Einlasskanal getrennt ist. Der Einlasskanal ist vorgesehen, um das Medium aus dem Behälter zur Einlassöffnung zu leiten. Die Belüftungsöffnung oder die Belüftungsöffnungen sind vorgesehen, um Luft zum Druckausgleich in den Behälter zu lassen. Durch die Trennwand wird sichergestellt, dass sich die eintretende Luft nicht unmittelbar mit der in die Pumpenkammer eintretende Flüssigkeit mischt. Die in die Pumpenkammer eintretende Flüssigkeit kann damit blasenfrei gehalten werden.Preferably, the ventilation path communicates with at least one ventilation opening and the inlet opening communicates with an inlet channel, the at least one ventilation opening being separated on its side remote from the ventilation section by a partition wall from the inlet channel. The inlet channel is provided to direct the medium from the container to the inlet port. The Ventilation opening or vents are provided to allow air to pressure equalization in the container. The partition wall ensures that the incoming air does not mix directly with the liquid entering the pump chamber. The entering into the pump chamber liquid can thus be kept free of bubbles.

Vorzugsweise weist der Kolben eine Bewegungsrichtung auf, die unter einem Winkel im Bereich von 60° bis 120°, insbesondere unter einem Winkel von 90° zu einer Ausgaberichtung des Mediums gerichtet ist. Dies ergibt eine einfache Handhabung. Ein Benutzer kann auf eine Handhabe einwirken, die den Kolben betätigt, wobei die Einwirkungsrichtung senkrecht oder annähernd senkrecht zu der Ausgaberichtung gerichtet ist.Preferably, the piston has a direction of movement which is directed at an angle in the range of 60 ° to 120 °, in particular at an angle of 90 ° to an output direction of the medium. This results in easy handling. A user may act on a handle which actuates the piston, the direction of action being directed perpendicular or approximately perpendicular to the dispensing direction.

Die Erfindung wird im Folgenden anhand eines bevorzugten Ausführungsbeispiels in Verbindung mit der Zeichnung beschrieben. Hierin zeigen:

Fig. 1
eine schematische Schnittansicht einer Austragvorrichtung,
Fig. 2
eine vergrößerte Teilansicht der Austragvorrichtung im unbetätigten Zustand und
Fig. 3
eine vergrößerte Teilansicht der Austragvorrichtung im betätigten Zustand.
The invention will be described below with reference to a preferred embodiment in conjunction with the drawings. Herein show:
Fig. 1
a schematic sectional view of a discharge device,
Fig. 2
an enlarged partial view of the discharge device in the unactuated state and
Fig. 3
an enlarged partial view of the discharge in the actuated state.

Fig. 1 zeigt eine Austragvorrichtung 1, die mit einem Behälter 2 verbunden ist. Der Behälter 2 kann mit einem flüssigen Medium gefüllt sein, das durch eine Ausgabedüse 3 ausgegeben werden soll. Das Medium ist aus Gründen der Übersicht nicht dargestellt. Fig. 1 shows a discharge device 1, which is connected to a container 2. The container 2 may be filled with a liquid medium to be dispensed through a dispensing nozzle 3. The medium is not shown for reasons of clarity.

Die Austragvorrichtung 1 weist ein Gehäuse 4 auf, das auf den Behälter 2 aufgeprellt oder auf andere Weise am Behälter 2 befestigt ist. Zwischen dem Gehäuse 4 und dem Behälter 2 ist eine Dichtung 5 angeordnet.The discharge device 1 has a housing 4 which is bounced on the container 2 or otherwise secured to the container 2. Between the housing 4 and the container 2, a seal 5 is arranged.

Im Gehäuse 4 ist ein Pumpengehäuse 6 angeordnet, das eine Pumpenkammer 7 umschließt. In der Pumpenkammer 7 ist ein Kolben 8 angeordnet, der durch eine Handhabe 9 gegen die Kraft einer Feder 10 betätigt werden kann. Bei der Betätigung wird der Kolben 8 in die Pumpenkammer 7 hineinbewegt und verkleinert dadurch das Volumen der Pumpenkammer 7.In the housing 4, a pump housing 6 is arranged, which encloses a pump chamber 7. In the pump chamber 7, a piston 8 is arranged, which can be actuated by a handle 9 against the force of a spring 10. Upon actuation, the piston 8 is moved into the pump chamber 7 and thereby reduces the volume of the pump chamber 7.

Die Pumpenkammer 7 weist eine Einlassöffnung 11 auf, die mit einem Einlasskanal 12 in Verbindung steht. Der Einlasskanal 12 stellt eine Verbindung zwischen dem Behälter 2 und der Einlassöffnung 11 her.The pump chamber 7 has an inlet opening 11 which communicates with an inlet channel 12. The inlet channel 12 establishes a connection between the container 2 and the inlet opening 11.

Ferner weist die Pumpenkammer mindestens eine Auslassöffnung 13 auf, die in einen Ringraum 14 mündet, der mit einem Auslasskanal 15 verbunden ist. Der Auslasskanal 15 wiederum führt zu einem druckgesteuerten Auslassventil 16. Das Auslassventil 16 steuert die Ausgabe des Mediums durch die Auslassöffnung 3. Es öffnet bei einem vorbestimmten ersten Druck auf seiner Eingangsseite, d.h. im Auslasskanal 15, und schließt bei einem vorbestimmten zweiten Druck im Auslasskanal 15. Die beiden Drücke können gleich sein, müssen es aber nicht.Furthermore, the pump chamber has at least one outlet opening 13, which opens into an annular space 14, which is connected to an outlet channel 15. The exhaust passage 15 in turn leads to a pressure-controlled exhaust valve 16. The exhaust valve 16 controls the output of the medium through the exhaust port 3. It opens at a predetermined first pressure on its input side, i. in the exhaust passage 15, and closes at a predetermined second pressure in the exhaust passage 15. The two pressures may be the same, but need not be.

Der Kolben 8 weist einen Fortsatz 17 auf, der kurz nach Beginn einer Bewegung in Richtung auf die Einlassöffnung 11 in die Einlassöffnung 11 eintritt. Eine Bewegung des Kolbens 8 aus seiner in Fig. 2 dargestellten unbetätigten oder Ruhe-Stellung hin heraus wird im Folgenden als "Förderhub" bezeichnet. Der Fortsatz 17 des Kolbens 8 verschließt die Einlassöffnung 11 also kurz nach Beginn des Förderhubs. Zu Beginn des Förderhubs ist allerdings ein Spalt zwischen dem Fortsatz 17 und der Einlassöffnung 11 vorhanden. Die Einlassöffnung 11 ist etwas kleiner als der Querschnitt des Fortsatzes 17, d.h. die Einlassöffnung 11 weist gegenüber dem Querschnitt des Fortsatzes 17 ein Untermaß auf. Hierzu ist die Einlassöffnung 16 mit einer Dichtlippe 18 versehen. Die Dichtlippe 18 legt sich bei einer Bewegung des Fortsatzes 17 in die Eingangsöffnung 11 hinein dichtend an den Fortsatz 17 an. Mit dem Eintritt des Fortsatzes 17 in die Einlassöffnung 11 ergibt sich ein klar definiertes Verschließen der Einlassöffnung 11 und damit ein klar definierter Zeitpunkt, an dem bei einer Weiterbewegung des Kolbens 8 in die Pumpenkammer 7 hinein eine Förderung des in der Pumpenkammer 7 befindlichen Mediums durch die Auslassöffnung 13 hinaus beginnt.The piston 8 has an extension 17, which enters the inlet opening 11 shortly after the start of a movement in the direction of the inlet opening 11. A movement of the piston 8 from his in Fig. 2 shown unactivated or resting position out is hereinafter referred to as "delivery stroke". The extension 17 of the piston 8 thus closes the inlet opening 11 shortly after the start of the delivery stroke. At the beginning of the delivery stroke, however, a gap between the extension 17 and the Inlet opening 11 available. The inlet opening 11 is slightly smaller than the cross section of the extension 17, ie the inlet opening 11 has an undersize relative to the cross section of the extension 17. For this purpose, the inlet opening 16 is provided with a sealing lip 18. The sealing lip 18 settles in a movement of the extension 17 into the inlet opening 11 in sealingly against the extension 17. With the entry of the extension 17 into the inlet opening 11 results in a clearly defined closing of the inlet opening 11 and thus a clearly defined time at which upon further movement of the piston 8 into the pump chamber 7 in a promotion of the medium located in the pump chamber 7 through the Outlet opening 13 also begins.

Da das Medium in der Regel inkompressibel ist, ergibt sich mit dem Beginn der Förderung des Mediums aus der Pumpenkammer 7 hinaus auch der entsprechende Druckanstieg, der zu einer Öffnung des Auslassventils 16 führt.Since the medium is incompressible as a rule, the commencement of the delivery of the medium out of the pump chamber 7 results in the corresponding increase in pressure, which leads to an opening of the outlet valve 16.

Der Kolben 8 weist einen Vergrößerungsbereich 19 auf, der sich in eine Richtung weg von der Einlassöffnung 11 verjüngt. Man kann den Vergrößerungsbereich 19 auch vereinfacht als "Kegel" bezeichnen, wenngleich eine konische Form nicht zwingend ist. Der Vergrößerungsbereich liegt mit seinem größten Durchmesser 20 an einer Innenwand 21 der Pumpenkammer 7 an. Am Ende des Förderhubs (Fig. 3) tritt der größte Durchmesser 20 in eine Entladungskammer 22 ein, die einen größeren Durchmesser als die Pumpenkammer 7 aufweist und die mit der Auslassöffnung 13 oder den Auslassöffnungen verbunden ist. In diesem Augenblick liegt der größte Durchmesser 20 nicht mehr an der Innenwand der Pumpenkammer 7 an, so dass sich eine Verbindung zwischen der Auslassöffnung 13 und einem Niederdruckbereich ergibt. Alternativ dazu gibt der größte Durchmesser 20 die Auslassöffnung 13 zumindest teilweise frei, d.h. der Vergrößerungsbereich ist über die Auslassöffnung 13 zumindest teilweise hinwegbewegt worden. Auch dadurch wird die Auslassöffnung 13 mit dem Niederdruckbereich verbunden. Der Druck im Auslasskanal 15 sinkt damit schlagartig auf den Druck im Niederdruckbereich. Das Auslassventil 16 schließt. Da auch der Schließdruck des Auslassventils 16 und damit der Schließzeitpunkt von der Stellung des Kolbens 8 in der Pumpkammer 7 bestimmt ist, lässt sich das durch die Auslassöffnung 3 ausgegebene Volumen des Mediums sehr genau dosieren.The piston 8 has a magnification area 19 that tapers in a direction away from the inlet port 11. Simplified, the enlargement region 19 can also be referred to as a "cone", although a conical shape is not mandatory. The enlargement region lies with its largest diameter 20 against an inner wall 21 of the pump chamber 7. At the end of the delivery ( Fig. 3 ), the largest diameter 20 enters a discharge chamber 22, which has a larger diameter than the pump chamber 7 and which is connected to the outlet opening 13 or the outlet openings. At this moment, the largest diameter 20 is no longer on the inner wall of the pump chamber 7, so that there is a connection between the outlet opening 13 and a low pressure area. Alternatively, the largest diameter 20 at least partially exposes the outlet opening 13, ie the enlargement area is at least over the outlet opening 13 partially moved away. Also by the outlet opening 13 is connected to the low pressure area. The pressure in the outlet channel 15 thus drops abruptly to the pressure in the low pressure range. The exhaust valve 16 closes. Since the closing pressure of the outlet valve 16 and thus the closing time of the position of the piston 8 in the pumping chamber 7 is determined, the volume of the medium discharged through the outlet port 3 can be metered very accurately.

Der Niederdruckbereich umfasst mindestens eine Belüftungsöffnung 23 im Pumpenkammergehäuse 6, die mit einem Belüftungskanal 24 im Gehäuse 4 in Verbindung steht. Damit herrscht im Belüftungskanal 24 und in der Belüftungsöffnung 23 ein Druck, der dem Druck im Inneren des Behälters 2 entspricht. Dieser Druck ist deutlich niedriger als ein während des Förderhubs des Kolbens 8 in der Pumpenkammer 7 herrschender Druck.The low-pressure region comprises at least one ventilation opening 23 in the pump chamber housing 6, which communicates with a ventilation channel 24 in the housing 4. Thus prevails in the ventilation channel 24 and in the ventilation opening 23, a pressure corresponding to the pressure in the interior of the container 2. This pressure is significantly lower than a prevailing during the delivery stroke of the piston 8 in the pump chamber 7 pressure.

Wenn der Kolben nach Abschluss eines Förderhubs unter der Wirkung der Feder 10 wieder in seine Ausgangs- oder Ruhestellung zurückbewegt wird, bewegt sich der Fortsatz 17 auch aus der Einlassöffnung 11 heraus. Mit der Rückbewegung des Kolbens 8 entsteht in der Pumpenkammer 7 ein Unterdruck, so dass sich dann, wenn sich zwischen dem Fortsatz 17 und der Dichtlippe 18 wieder ein Spalt ergeben hat, Medium aus dem Behälter 2 durch den Einlasskanal 12 und die Einlassöffnung 11 in die Pumpenkammer 7 gelangen kann. Um dann einen Druckausgleich im Behälter 2 herzustellen, ist eine Belüftungsstrecke 25 zwischen dem Kolben 8 und einem Gehäuseteil 26, in dem der Kolben gelagert ist, vorgesehen. Die Belüftungsstrecke 25 ist die einzige Verbindung zwischen dem Inneren des Behälters 2 und der Umgebung.When the piston is moved back to its initial or rest position after completion of a delivery stroke under the action of the spring 10, the extension 17 also moves out of the inlet opening 11. With the return movement of the piston 8, a negative pressure is created in the pump chamber 7, so that when a gap has again formed between the extension 17 and the sealing lip 18, medium from the container 2 through the inlet channel 12 and the inlet opening 11 into the Pump chamber 7 can get. In order then to produce a pressure equalization in the container 2, a ventilation line 25 between the piston 8 and a housing part 26, in which the piston is mounted, is provided. The ventilation section 25 is the only connection between the interior of the container 2 and the environment.

Eine Filteranordnung 28 umgibt den Kolben 8. Dementsprechend verläuft die Belüftungsstrecke 25 durch die Filteranordnung 28 hindurch.A filter assembly 28 surrounds the piston 8. Accordingly, the ventilation path 25 passes through the filter assembly 28 therethrough.

Das Gehäuseteil 26 weist am Ende der Belüftungsstrecke 25, das der Einlassöffnung 11 zugewandt ist, einen Ventilsitz 27 auf, an dem in einem unbetätigten Zustand des Kolbens 8 ein am Kolben 8 ausgebildetes oder mit dem Kolben 8 verbundenes Ventilelement anliegt.The housing part 26 has at the end of the ventilation section 25, which faces the inlet opening 11, a valve seat 27 on which in an unactuated state of the piston 8 is formed on the piston 8 formed or connected to the piston 8 valve member.

Im vorliegenden Fall ist das Ventilelement durch einen von der Einlassöffnung 11 abgewandten Bereich der Durchmesservergrößerung 19 gebildet. Im unbetätigten Zustand des Kolbens 8 gelangt also keine Luft mehr in den Behälter 2, so dass das Risiko einer Kontaminierung des Inhalts des Behälters 2 klein gehalten wird. Weiterhin verhindert die Anlage der Durchmesservergrößerung 19 am Ventilsitz 27, dass Flüssigkeit aus dem Behälter 2 nach außen dringen kann.In the present case, the valve element is formed by a region of the diameter enlargement 19 facing away from the inlet opening 11. In the unactuated state of the piston 8 so no more air enters the container 2, so that the risk of contamination of the contents of the container 2 is kept small. Furthermore, the system prevents the increase in diameter 19 on the valve seat 27, that liquid from the container 2 can escape to the outside.

Die Belüftungsöffnung 23 oder die Belüftungsöffnungen und der Einlasskanal 12 sind auf der dem Behälter 2 zugewandten Seite des Gehäuses 4 mit einer Trennwand 29 voneinander getrennt. Luft, die durch die Belüftungsstrecke 25 in die Austragvorrichtung 1 eintritt, kann sich also nicht mit dem flüssigen Medium mischen, das am Einlasskanal 12 ansteht und demnächst in die Pumpenkammer 7 eingesaugt wird. Damit lässt sich eine blasenfreie Füllung der Pumpenkammer 7 erreichen.The ventilation opening 23 or the ventilation openings and the inlet channel 12 are separated on the side facing the container 2 of the housing 4 with a partition wall 29 from each other. Air that enters the discharge device 1 through the ventilation section 25, therefore, can not mix with the liquid medium, which is present at the inlet channel 12 and will soon be sucked into the pump chamber 7. This allows a bubble-free filling of the pump chamber 7 can be achieved.

Ein Verschlussschieber 30 ist vorgesehen, der unter eine Unterkante 31 der Handhabe 9 geschoben werden kann, um eine Betätigung der Handhabe 9 zu verhindern. Die Blockierung der Handhabe 9 ist allerdings reversibel.A closure slide 30 is provided, which can be pushed under a lower edge 31 of the handle 9 to prevent actuation of the handle 9. The blocking of the handle 9 is reversible.

Die Austragvorrichtung kann ferner eine Außenhülse 32 umfassen, die einen Kopf 33 am Gehäuse 4 festhält.The discharge device may further comprise an outer sleeve 32, which holds a head 33 on the housing 4.

Die Austragvorrichtung ist insbesondere für eine "über Kopf-Ausgabe des Mediums aus dem Behälter 2 geeignet, also für eine Situation, in der der Behälter 2 in Schwerkraftrichtung oberhalb der Tragvorrichtung 1 angeordnet ist.The discharge device is particularly suitable for an over-head delivery of the medium from the container 2, so for a situation in which Container 2 is arranged in the direction of gravity above the support device 1.

Der Kolben 8 ist quer zu einer Ausgaberichtung des Mediums angeordnet und bewegbar, d.h. der Kolben 8 schließt mit einer Ausgabeeinrichtung einen Winkel im Bereich von 60° bis 120° ein, vorzugsweise etwa 90°.The piston 8 is arranged transversely to an output direction of the medium and movable, i. the piston 8 closes with an output device at an angle in the range of 60 ° to 120 °, preferably about 90 °.

Claims (10)

Austragvorrichtung (1) zum Austragen von flüssigen Medien mit einer Pumpenkammer (7), die eine Einlassöffnung (11) und mindestens eine Auslassöffnung (13) aufweist, und einem Kolben (8), der in der Pumpenkammer (7) verschiebbar ist, dadurch gekennzeichnet, dass der Kolben (8) einen Fortsatz (17) aufweist, der nach einem vorbestimmten Hub des Kolbens (8) in die Einlassöffnung eintritt.Discharge device (1) for discharging liquid media with a pump chamber (7) having an inlet opening (11) and at least one outlet opening (13), and a piston (8) which is displaceable in the pump chamber (7), characterized in that the piston (8) has an extension (17) which enters the inlet opening after a predetermined stroke of the piston (8). Austragvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Einlassöffnung (11) gegenüber einem Querschnitt des Fortsatzes (17) ein Untermaß aufweist.Discharge device according to claim 1, characterized in that the inlet opening (11) with respect to a cross section of the extension (17) has an undersize. Austragvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Einlassöffnung (11) eine Dichtlippe (18) aufweist, die mit dem Fortsatz (17) zusammenwirkt.Discharge device according to claim 1 or 2, characterized in that the inlet opening (11) has a sealing lip (18) which cooperates with the extension (17). Austragvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die mindestens eine Auslassöffnung (13) mit einem druckgesteuerten Auslassventil (16) verbunden ist und der Kolben (8) am Ende eines Förderhubs die Auslassöffnung (13) mit einem Niederdruckbereich verbindet.Discharge device according to one of Claims 1 to 3, characterized in that the at least one outlet opening (13) is connected to a pressure-controlled outlet valve (16) and the piston (8) connects the outlet opening (13) with a low-pressure area at the end of a delivery stroke. Austragvorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass der Kolben (8) einen sich in eine Richtung von der Einlassöffnung (11) weg verjüngenden Vergrößerungsbereich (19) aufweist, der mit seinem größten Außendurchmesser (20) an einer Innenwand (21) der Pumpenkammer anliegt und am Ende des Förderhubs zumindest über einen Teil der mindestens einen Auslassöffnung (13) hinweg bewegt worden ist oder in eine Entladungskammer (22) größeren Durchmessers eintritt, die mit der Auslassöffnung (13) verbunden ist.Discharge device according to claim 4, characterized in that the piston (8) has a in a direction from the inlet opening (11) away tapered enlargement region (19), which rests with its largest outer diameter (20) on an inner wall (21) of the pump chamber and has been moved at least over part of the at least one outlet opening (13) or enters a larger diameter discharge chamber (22) connected to the outlet opening (13) at the end of the delivery stroke. Austragvorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Kolben (8) in einem Gehäuseteil (26) geführt ist, wobei eine Belüftungsstrecke (25) zwischen dem Kolben (8) und dem Gehäuseteil (26) ausgebildet ist.Discharge device according to one of claims 1 to 5, characterized in that the piston (8) in a housing part (26) is guided, wherein a ventilation line (25) between the piston (8) and the housing part (26) is formed. Austragvorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass der Gehäuseteil (26) an einem inneren Ende der Belüftungsstrecke einen Ventilsitz (27) bildet, an dem in einem unbetätigten Zustand des Kolbens (8) ein am Kolben (8) ausgebildetes oder mit dem Kolben (8) verbundenes Ventilelement anliegt.Discharge device according to claim 6, characterized in that the housing part (26) at an inner end of the ventilation section forms a valve seat (27) on which in an unactuated state of the piston (8) formed on the piston (8) or with the piston ( 8) connected valve element is present. Austragvorrichtung nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass die Belüftungsstrecke (25) durch eine Filteranordnung (28) hindurch verläuft.Discharge device according to claim 6 or 7, characterized in that the ventilation section (25) passes through a filter arrangement (28). Austragvorrichtung nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass die Belüftungsstrecke (25) mit mindestens einer Belüftungsöffnung (23) in Verbindung steht und die Einlassöffnung (11) mit einem Einlasskanal (12) in Verbindung steht, wobei die mindestens eine Belüftungsöffnung (23) auf ihrer von der Belüftungsstrecke (25) abgewandten Seite durch eine Trennwand (29) vom Einlasskanal (12) getrennt ist.Discharge device according to one of claims 6 to 8, characterized in that the ventilation section (25) with at least one ventilation opening (23) is in communication and the inlet opening (11) with an inlet channel (12) is in communication, said at least one ventilation opening ( 23) is separated on its side remote from the ventilation section (25) by a partition wall (29) from the inlet channel (12). Austragvorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass der Kolben (8) eine Bewegungsrichtung aufweist, die unter einem Winkel im Bereich von 60° bis 120° zu einer Ausgaberichtung des Mediums gerichtet ist.Discharge device according to one of claims 1 to 9, characterized in that the piston (8) has a direction of movement which is directed at an angle in the range of 60 ° to 120 ° to an output direction of the medium.
EP18204255.6A 2018-01-09 2018-11-05 Application device for applying liquid media Active EP3508280B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018100338.2A DE102018100338A1 (en) 2018-01-09 2018-01-09 Discharge device for discharging liquid media

Publications (2)

Publication Number Publication Date
EP3508280A1 true EP3508280A1 (en) 2019-07-10
EP3508280B1 EP3508280B1 (en) 2021-03-10

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EP18204255.6A Active EP3508280B1 (en) 2018-01-09 2018-11-05 Application device for applying liquid media

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US (1) US10618071B2 (en)
EP (1) EP3508280B1 (en)
DE (1) DE102018100338A1 (en)
ES (1) ES2867894T3 (en)

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Also Published As

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US10618071B2 (en) 2020-04-14
DE102018100338A1 (en) 2019-07-11
US20190210049A1 (en) 2019-07-11
EP3508280B1 (en) 2021-03-10
ES2867894T3 (en) 2021-10-21

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