EP0484773A1 - Dispensing device for fluids - Google Patents

Dispensing device for fluids Download PDF

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Publication number
EP0484773A1
EP0484773A1 EP91118296A EP91118296A EP0484773A1 EP 0484773 A1 EP0484773 A1 EP 0484773A1 EP 91118296 A EP91118296 A EP 91118296A EP 91118296 A EP91118296 A EP 91118296A EP 0484773 A1 EP0484773 A1 EP 0484773A1
Authority
EP
European Patent Office
Prior art keywords
stroke
valve
pump
pump chamber
discharge device
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
EP91118296A
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German (de)
French (fr)
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EP0484773B1 (en
Inventor
Karl-Heinz Fuchs
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.)
Aptar Radolfzell GmbH
Original Assignee
Erich Pfeiffer GmbH
Ing Erich Pfeiffer GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Erich Pfeiffer GmbH, Ing Erich Pfeiffer GmbH filed Critical Erich Pfeiffer GmbH
Publication of EP0484773A1 publication Critical patent/EP0484773A1/en
Application granted granted Critical
Publication of EP0484773B1 publication Critical patent/EP0484773B1/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
    • B05B11/1016—Piston pumps the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element
    • B05B11/1018—Piston pumps the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element and the controlling element cooperating with means for opening or closing the inlet valve
    • 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
    • B05B11/1087—Combination of liquid and air pumps

Definitions

  • the invention relates to a discharge device for at least one medium or for flowable media of essentially any physical state.
  • Such a discharge device can indeed be used to discharge at least one medium via a pressure source, e.g. a pressure accumulator, operated and thereby operated only by manually opening an outlet valve, but expediently has a pump with a pump chamber for at least one medium, which is narrowed by manual force to convey media.
  • the discharge device is preferably designed for one-handed use, the forces to be applied for the discharge being expediently only generated manually.
  • the funding of at least one medium can be controlled for different purposes depending on the stroke.
  • an outlet valve can only be opened by a stop at the end of the stroke in order to achieve a high discharge pressure.
  • a pressure relief can also be provided at the end of the stroke, for example by unsealing a pump piston be provided to end the media funding as suddenly as possible.
  • control means are conceivable for conveying a further medium, for example compressed gas, which is discharged in addition to a first medium, before the start and / or after the end of the conveyance of the first medium through the discharge opening or the like, or for the first and / or at least one discharge of the medium after a partial stroke after the start of the stroke.
  • control means can be provided in order to convey at least a part of the conveyed further medium directly to a discharge nozzle and / or at least a part at a greater distance in front of it directly into an outlet channel leading to this discharge nozzle or to the discharge opening.
  • This allows the media to be mixed at any point and / or e.g. for cleaning and blowing the outlet channel and the nozzle or for other purposes in succession.
  • the invention is further based on the object of providing a discharge device of the type mentioned, by means of which disadvantages of known designs are avoided or effects of the type described can be achieved and which, in particular, ensures very precise control of the media delivery of at least one medium with a simple design.
  • this object is solved by the features of claim 1.
  • this start or the build-up of a discharge pressure can at least partially controlled in such a way that it only takes place after a first partial stroke.
  • the media delivery can be interrupted one or more times, for example by relieving the discharge pressure in the pump chamber or the like.
  • the free travel of the actuation stroke corresponding to the first partial stroke until the mechanical or path-dependent control unit responds can be used for numerous different functions.
  • this empty path is used to build up a delivery pressure of at least one second medium and / or to open a pressure-dependent outlet valve for this second medium.
  • This can e.g. Compressed air is initially biased in a pump chamber via the idle path and then advanced by opening the outlet valve, after which the first, e.g. liquid medium is also conveyed to the discharge opening.
  • the delivery of the second medium can then take place continuously up to the end of the stroke of the actuation and, if necessary, a short time beyond, while the delivery of the first medium has already stopped before the end of the stroke.
  • the mechanical control enables a very precise mutual adjustment of these functional sequences.
  • the pressure in the pump chamber is expediently changed by opening and closing a slide-controlled control valve between a discharge pressure reaching for the discharge to the discharge opening and a pressure not sufficient for this, the valve outlet of this at least one control valve not to the outlet channel or to the outlet opening, but leads back to a media store via a return channel.
  • No separate return channel is required for this if the inlet or suction channel for the pressure chamber is also used as the return channel becomes.
  • no separate control valve is required if it is formed by a path-dependent controlled inlet valve for the pressure chamber, for which then no pressure-dependent inlet valve is required.
  • the movable valve body of the inlet valve if it is formed by a pump piston, in particular a pre-suction piston of the pump.
  • the medium is deflected twice in opposite directions, namely first in the discharge direction from the pump chamber and then in the opposite direction into the return channel.
  • the training according to the invention is particularly suitable for discharge devices according to DE-OS 37 15 303, to which reference is made for further details and effects.
  • the first idle or partial stroke is expediently more than a ninth to a quarter or a third of the total stroke and can also correspond to approximately half of the total stroke.
  • the corresponding piston does not need to be guided with its inner circumference sealed to an inlet channel which projects substantially freely into the pump chamber, the inner circumference of the piston having a corresponding ring distance from the outer circumference of the inlet channel, the inlet channel in the jacket can be provided with through openings and / or can have longitudinal channels on the outer circumference via the associated longitudinal section.
  • the piston runs close to the outer circumference of the inlet channel, which in this area has no through openings or slots or an enlarged collar.
  • the component which determines the control characteristic of the control means and which is designed, for example, in the manner of a control curve can, is expediently formed by a part separate from an associated support or base body, so that the control characteristic can be changed as desired by selecting this component.
  • the component can, for example, only be fastened by means of a plug-in and / or snap connection or be fixed in the fastening position by a retaining spring.
  • the control valve expediently lies essentially entirely within the pump chamber.
  • the passage cross section of the return channel can be changed depending on the stroke, e.g. in that a mandrel and / or part of a spring, e.g. a helical spring, which means that the return channel, which is free at the beginning of the stroke, is limited to a ring channel after a first short partial stroke and before closing the control valve.
  • the return channel limited in this way which can also be helical due to the spring, then forms a return throttle, so that a pressure is built up in the pressure chamber by the time the control valve closes, but its level is lower than the discharge pressure required for delivery into the outlet channel.
  • the discharge device is expediently designed in accordance with DE-OS 37 22 469, to which reference is made for further details and effects.
  • the control means for the first, mostly non-compressible medium can be designed so that at least one pump pulse is generated during the essentially continuous conveying of the second medium, with which the first medium is supplied to the second medium.
  • a very fine atomization of an active ingredient can also be achieved by the inventive design.
  • the second medium is expediently discharged by pressure-dependent opening an associated output valve so that the conveying speed of this medium does not fall below a predetermined value.
  • the discharge device 1 which is essentially assembled from injection-molded plastic parts, is used for essentially sealed placement on the neck of a storage device, from which, with each return stroke, a certain amount of a medium is drawn in by a discharge pipe 3 via a riser pipe. It also has, from the atmosphere, bypassing a thrust piston pump 5 of the discharge unit 3, conveying means 4 for compressed air, which are essentially formed by a thrust piston pump 6 arranged on the same base body 2 in the same axis as the pump 5. Both pumps 5, 6 are essentially simultaneous with a common actuation 7 via a discharge and Actuate actuating head 8 by finger pressure so that a push actuation is transmitted to the pump movement.
  • the actuating head 8 has a discharge opening 9 opening into the open, which, influenced by control means 10, is connected to the discharge unit 3 via an outlet channel 11 and via a separate channel which opens near it to the conveyor 4 closer to it.
  • a cylinder housing 12 which is formed in one piece with the base body 2 accommodates a piston unit 13 which is formed by two separate pump pistons 14, 15 of the discharge unit 3 which are axially movable relative to one another and constantly mesh with one another.
  • the inner circumference of the pump piston 14 projecting in the direction of the pump stroke by about half its length over the other pump piston 15 is assigned an outer circumferential surface as a piston raceway 16.
  • the inner circumference of the cylinder housing 12 forms a cylinder raceway 17 for the sealed abutment of the front end of the pump piston 15, which, like the pump piston 14, is cup-shaped, but is considerably shorter.
  • An annular gap is formed between the cylinder race 17 and the outer circumference of the front, enlarged section of the pump piston 14 as well as between the inner circumference of the pump piston 15 and the outer circumference of the pump piston 14; the successive annular gaps represent a line connection for the outlet channel 11.
  • the cylinder housing 12 forms an inlet, through which the pump 5 draws in from the reservoir through a riser pipe and via which it, controlled by the control means 10, can convey back into the reservoir .
  • This inlet forms a substantially completely within the cylinder housing 12 and the cylinder race 17 and essentially in line with these lying inlet and return channel 18, the flow cross section can be changed depending on the stroke.
  • the channel 18 is delimited by a sleeve 19 projecting essentially freely and coaxially into the cylinder housing, the outer circumference of which has a radial distance from the cylinder race 17 and forms a control valve 20 with an inner sealing lip 21 at the front end of the pump piston 14.
  • the sealing lip 22 running on the piston raceway 17 is located at the front end of the pump piston 15.
  • the outer circumference of the sleeve 19 forms a valve seat 23 between the ends and only over a part of its length over which the sealing lip 21 has been passed, for the sealingly displaceable contact of the sealing lip 21.
  • the sleeve 19 is on the associated section with a radial against the cylinder track 17 projecting collar 24 provided.
  • an obliquely frusto-conical inclined surface 25 At the end of the cylindrical valve seat 23, which was first reached by the sealing lip 21 during the pumping stroke, is followed by an obliquely frusto-conical inclined surface 25, while the other end is delimited by an annular shoulder 26 lying approximately at right angles to the valve seat 23.
  • the sections 27, 28 lying adjacent to the collar 24 can have essentially the same outer width, which is approximately constant through to the respective associated end, such that an annular gap is delimited between them and the sealing lip 21.
  • the same outside width also has a plug-in section 29 formed by a front end, with which the sleeve 19 is inserted in a tightly adapted manner, narrowed relative to the cylinder race 17 and adjoining it via an annular shoulder, with an opening of the cylinder housing 17 which is limited by a stop.
  • the slide or piston 14 forms with the sleeve 19 a throttle 30, the flow cross section of which changes with the position of the pump piston 14 depending on the path.
  • the jacket of the pump piston 14 is so narrowed at a distance behind the sealing lip 21 on the inner circumference that with the outer circumference of the section 27 it can limit an annular gap which is narrower than the annular gap in the region of the sealing lip 21.
  • a mandrel 31 lies completely inside the pump piston 14, the front end of which is set back relative to the sealing lip 21.
  • a pretensioned helical compression spring 32 is fitted snugly on the outer circumference of the mandrel 31 and is provided as the only spring for all resetting functions of the discharge unit 3 and for the pump resetting of the conveying means 4.
  • the other end of the spring 32 is supported within the plug section 29 on an annular shoulder and therefore presses the sleeve 19 connected to the riser pipe into its stop position.
  • the spring 32 lies with its outer circumference closely on the inner circumference of the channel 18. In the starting position according to FIGS. 1 and 2, the free end 33 of the sleeve 19 lies within the pump piston 14 at a short distance behind the sealing lip 21 and at a short distance from the front end of the mandrel 31.
  • the pump piston 14 is moved over a first partial stroke 38 corresponding to this distance, the front end of the mandrel 31 penetrates into the channel 18, so that a helical channel which is essentially closed in cross section over the outer circumference is penetrated by the windings of the spring 32 lying therebetween is limited within the sleeve 19 and then to the end 33, the flow cross section of which can be smaller than that of the annular gap in the region of the sealing lip 21.
  • the partial stroke 38 lies at the beginning of a first partial stroke 34, which is required until the sealing lip 21 has reached the beginning of the inclined surface 25.
  • the annular gap in the area of the sealing lip 21 becomes continuously narrower until the sealing lip 21 runs onto the inclined surface 25 and thereby the connection between the channel 18 and the annular pump chamber 39 closes.
  • the end 33 of the sleeve 19 reaches the narrowed section of the pump piston 14, so that both parts can be brought together and the liquid in the hollow pump piston 14 can be pressed further through the channel 18 back into the reservoir.
  • the sealing lip 21 then reaches the cylindrical valve seat 23 under radial prestress, which determines the next subsequent partial stroke 36 and via which a delivery or discharge pressure is now built up in the pump chamber 39.
  • the medium can be conveyed from the pump chamber 39 to the outlet channel 11 via the annular gaps mentioned on the outer circumference of the pump piston 14.
  • the line connection between the pump chamber 39, which is now substantially constricted, and the channel 18 can be opened again, if necessary throttled, opened or closed, depending on the dimensions selected.
  • the line connection is opened here when the outer circumference of section 27 is smaller than the narrowed inner circumference of pump piston 14 because an annular passage gap is then provided.
  • the line connection is closed when the outer width of section 27 is approximately the same size as the narrowed inner circumference. Since a right-angled or at most obtuse-angled conical shoulder 26 adjoins the corresponding end of the valve seat 23, the annular gap between the sealing lip 21 is suddenly opened when this end is passed over. From this end, the last partial stroke 37 takes place until the pump piston 14 strikes the end 33 of the sleeve 19 and the sealing lip 21 is still a short distance from the floor or the associated annular shoulder of the pump chamber 39.
  • outlet valve 40 which is biased by the spring 32 to the closed position and whose valve parts can be moved against one another on the two pump pistons 14, 15.
  • the tapered valve body 44 is formed in one piece with the end wall 42 which closes off the pump piston 14 at the narrowed, cylindrical piston section 41 and projects with its base beyond the outside thereof. The end 33 abuts on the inside of this end wall 42 and the spring 32 is supported.
  • the narrower end of the valve body 44 merges in one piece into a shaft 46 which extends over most of the length of the outlet channel 11 and which is mounted by inserting it into a central channel of a piston rod 47 and with it delimits a section of the outlet channel 11 which is annular in cross section.
  • the pump piston 14 is thus centered in the starting position only by the valve body 44 relative to the other pump parts and can then be guided on the corresponding partial strokes 35 to 37 by guiding on the inclined surface 25, on the valve seat 23 and / or on the section 27, so that also open outlet valve 40 accurate centering is ensured.
  • the outlet valve 40 is adjusted so that it opens against the force of the spring 32 when the sealing lip 21 runs on the valve seat 23, so that the medium is then pumped out of the pump chamber 39 to the discharge opening 9.
  • the pump chamber 39 is relieved of pressure by returning it to the channel 18, so that the opening end of the partial stroke 37 acting on the rear end faces of the pump piston 14, because that in the pump chamber 51 of the pump 6 Compressed air continues to flow even after the end of the actuation until a pressure limit value is reached.
  • the pump chamber 51 is of a on the base body 2 with a snap connection in the essentially fixed pump piston 48 and a pump cylinder 49, which is formed by the jacket of the actuating head 8.
  • the pump piston 48 is penetrated by the outlet channel 11 or by the actuating plunger 47.
  • a pressure-dependent output valve 50 is provided, which opens after a first partial stroke and before the partial stroke 36 is reached.
  • the discharge device can be inserted and installed from one side of the base body 2, namely from the open side of the cylinder housing 12, by plugging. Since the pump pistons 14, 15 have essentially flat end walls 42, 43 and the valve seat 45 lies approximately in the plane of the inside of the end wall 43, very compact dimensions are also achieved for the piston unit 13.
  • the pump pistons 14, 15 have essentially only cylindrical outer and / or inner shapes in the jacket area.
  • the pump piston 48 is fastened with a snap connection and forms a closure for the rear mounting opening of the cylinder housing 12.
  • the discharge device can also have, in a simple manner behind the sealing lip 22 which is in the starting position, a ventilation 52 for the storage vessel which is fed via the pump chamber 51 and which, at least in the starting position, is tightly closed by a ventilation valve 53.
  • a ventilation 52 for the storage vessel which is fed via the pump chamber 51 and which, at least in the starting position, is tightly closed by a ventilation valve 53.
  • the end wall 43 of the pump piston 15 forms on its outside a one-piece, conical valve body, which is pressed under the force of the spring 32 against a valve seat, the closing force being transmitted essentially only via the valve parts of the exhaust valve 40 lying against one another.
  • the valve seat is expediently formed by a sleeve 54 of the pump piston 48 which engages in the rear, enlarged end of the cylinder housing 12 and is penetrated by the actuating plunger 47, so that it can be made of a relatively soft material.
  • the annular ventilation channel leads from the pump chamber 51 between the sleeve 54 and the actuating plunger 47 to the ventilation valve 53 and from there adjacent to the pump piston 15 across the jacket of the cylinder housing 12 into an annular gap which is between the outer periphery of the rear end of the cylinder housing 12 and the inner periphery a flange sleeve 55 of the base body 2 which surrounds this at a radial distance is formed.
  • a cap 56 for example a screw and / or plug cap for attaching the discharge device 1 to the bottle neck or the like of the memory.
  • the memory can also be flexibly connected to the discharge device.
  • the storage space of the storage vessel can be pressurized with the pump 6, so that the stored medium is pressed through the channel 18 into the pump chamber 39 at the beginning of the return stroke of the pump 5 or at least the suction of the medium is supported.
  • the control means 10 described result in a pressure build-up that gradually approaches the outlet pressure of the outlet valve 40, so that the opening of the outlet valve 40 is reached very quickly at the beginning of the partial stroke 36.

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  • Details Of Reciprocating Pumps (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Reciprocating Pumps (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Photographic Developing Apparatuses (AREA)
  • Coating Apparatus (AREA)
  • Closures For Containers (AREA)

Abstract

A dispensing device (1) for fluids has a fluid pump (5) and a compressed air pump (6) and control means (10), by means of which only precompression takes place in the pump (6) in a stroke-dependent manner during a first partial stroke (34), then during a further partial stroke (36) fluid is conveyed out of the two pumps (5, 6) after a pressure-dependent opening of outlet valves and finally during a further partial stroke (37) fluid is conveyed out of the pump (6) only. So that the pump (5) does not feed into the outlet channel (11) via the partial strokes (35, 37), fluid is conveyed back into the accumulator via the inlet channel (18). <IMAGE>

Description

Die Erfindung betrifft eine Austragvorrichtung für mindestens ein Medium bzw. für fließfähige Medien von im wesentlichen beliebigen Aggregatzuständen.The invention relates to a discharge device for at least one medium or for flowable media of essentially any physical state.

Eine solche Austragvorrichtung kann zwar zum Austrag mindestens eines Mediums über eine Druckquelle, z.B. einen Druckspeicher, betrieben und dadurch lediglich durch manuelles Öffnen eines Auslaßventiles betätigt werden, weist jedoch zweckmäßig für mindestens ein Medium eine Pumpe mit einer Pumpenkammer auf, die zur Medienförderung durch manuelle Kraft verengt wird. Die Austragvorrichtung ist bevorzugt zur einhändigen Benutzung ausgebildet, wobei die zum Austrag aufzubringenden Kräfte zweckmäßig nur manuell erzeugt werden.Such a discharge device can indeed be used to discharge at least one medium via a pressure source, e.g. a pressure accumulator, operated and thereby operated only by manually opening an outlet valve, but expediently has a pump with a pump chamber for at least one medium, which is narrowed by manual force to convey media. The discharge device is preferably designed for one-handed use, the forces to be applied for the discharge being expediently only generated manually.

Die Förderung mindestens eines Mediums kann für verschiedene Zwecke hubabhängig gesteuert werden. Z.B. kann ein Auslaßventil erst am Hubende durch Anschlag geöffnet werden, um einen hohen Austragdruck zu erzielen. Auch kann am Hubende z.B. durch Aufheben der Abdichtung eines Pumpkolbens eine Druckentlastung vorgesehen sein, um die Medienförderung möglichst schlagartig zu beenden. Des weiteren sind Steuermittel denkbar, um ein zusätzlich zu einem ersten Medium ausgetragenes weiteres Medium, z.B. Druckgas, vor Beginn und/oder nach Beendigung der Förderung des ersten Mediums durch die Austragöffnung oder dgl. zu fördern bzw. um das erste und/oder mindestens ein weiteres Medium erst nach einem an den Hubanfang anschließenden Teilhub verzögert auszutragen.The funding of at least one medium can be controlled for different purposes depending on the stroke. For example, an outlet valve can only be opened by a stop at the end of the stroke in order to achieve a high discharge pressure. A pressure relief can also be provided at the end of the stroke, for example by unsealing a pump piston be provided to end the media funding as suddenly as possible. Furthermore, control means are conceivable for conveying a further medium, for example compressed gas, which is discharged in addition to a first medium, before the start and / or after the end of the conveyance of the first medium through the discharge opening or the like, or for the first and / or at least one discharge of the medium after a partial stroke after the start of the stroke.

Des weiteren können Steuermittel vorgesehen sein, um wenigstens einen Teil des geförderten weiteren Mediums unmittelbar einer Austragdüse und/oder wenigstens einen Teil in größerem Abstand davor unmittelbar in einen zu dieser Austragdüse bzw. zur Austragöffnung führenden Auslaßkanal zu fördern. Dadurch können die Medien an beliebiger Stelle gemischt und/oder z.B. zum reinigenden Freiblasen des Auslaßkanales und der Düse oder zu anderen Zwecken aufeinanderfolgend gefördert werden. Es können so zwar, je nach den durch die Eigenschaften des jeweiligen Mediums bzw. durch die Art des Austrages gegebenen Erfordernissen, zahlreiche Wirkungen erzielt werden, jedoch besteht das Bedürfnis, hierfür noch andere Wirkungen zu ermöglichen.Furthermore, control means can be provided in order to convey at least a part of the conveyed further medium directly to a discharge nozzle and / or at least a part at a greater distance in front of it directly into an outlet channel leading to this discharge nozzle or to the discharge opening. This allows the media to be mixed at any point and / or e.g. for cleaning and blowing the outlet channel and the nozzle or for other purposes in succession. Although it is possible to achieve numerous effects depending on the requirements given by the properties of the respective medium or by the type of discharge, there is a need to enable other effects for this.

Der Erfindung liegt des weiteren die Aufgabe zugrunde, eine Austragvorrichtung der genannten Art zu schaffen, durch welche Nachteile bekannter Ausbildungen vermieden bzw. Wirkungen der beschriebenen Art erreichbar sind und die insbesondere eine sehr präzise Steuerung der Medienförderung mindestens eines Mediums bei einfacher Ausbildung gewährleistet.The invention is further based on the object of providing a discharge device of the type mentioned, by means of which disadvantages of known designs are avoided or effects of the type described can be achieved and which, in particular, ensures very precise control of the media delivery of at least one medium with a simple design.

Diese Aufgabe wird durch die Merkmale des Anspruches 1 gelöst. Anstatt den Beginn der Medienförderung für mindestens ein Medium nach einem ersten Teilhub nur durch das Öffnen eines druckabhängig arbeitenden Auslaßventiles zu bestimmen, kann dieser Beginn bzw. der Aufbau eines Austragdruckes wenigstens teilweise wegabhängig so gesteuert werden, daß er erst nach einem ersten Teilhub erfolgt. Danach kann die Medienförderung z.B. durch Entlastung des Austragdruckes in der Pumpenkammer oder dgl. ein- oder mehrfach unterbrochen werden. Der dem ersten Teilhub entsprechende Leerweg des Betätigungshubes bis zum Ansprechen der mechanisch bzw. wegabhängig arbeitenden Steuerung kann für zahlreiche unterschiedliche Funktionen genutzt werden.This object is solved by the features of claim 1. Instead of determining the start of media delivery for at least one medium after a first partial stroke only by opening a pressure-dependent outlet valve, this start or the build-up of a discharge pressure can at least partially controlled in such a way that it only takes place after a first partial stroke. Thereafter, the media delivery can be interrupted one or more times, for example by relieving the discharge pressure in the pump chamber or the like. The free travel of the actuation stroke corresponding to the first partial stroke until the mechanical or path-dependent control unit responds can be used for numerous different functions.

Besonders zweckmäßig ist es, wenn dieser Leerweg zum Aufbau eines Förderdruckes mindestens eines zweiten Mediums und/oder zur Öffnung eines druckabhängig arbeitenden Auslaßventiles für dieses zweite Medium genutzt wird. Dadurch kann z.B. Druckluft über den Leerweg zunächst in einer Pumpenkammer vorgespannt und dann durch Öffnen des Auslaßventiles vorgefördert werden, wonach erst das erste, z.B. flüssige Medium ebenfalls an die Austragöffnung gefördert wird. Die Förderung des zweiten Mediums kann dann kontinuierlich bis zum Hubende des Betätigungshubes und ggf. eine kurze Zeit darüberhinaus erfolgen, während die Förderung des ersten Mediums bereits vor dem Hubende wieder abgebrochen ist. Durch die mechanische Steuerung ist eine sehr präzise gegenseitige Justierung dieser Funktionsabläufe möglich.It is particularly expedient if this empty path is used to build up a delivery pressure of at least one second medium and / or to open a pressure-dependent outlet valve for this second medium. This can e.g. Compressed air is initially biased in a pump chamber via the idle path and then advanced by opening the outlet valve, after which the first, e.g. liquid medium is also conveyed to the discharge opening. The delivery of the second medium can then take place continuously up to the end of the stroke of the actuation and, if necessary, a short time beyond, while the delivery of the first medium has already stopped before the end of the stroke. The mechanical control enables a very precise mutual adjustment of these functional sequences.

Bei Verwendung einer Pumpe wird zweckmäßig der Druck in der Pumpenkammer durch Öffnen und Schließen eines schiebergesteuerten Steuerventiles zwischen einem für den Austrag zur Austragöffnung reichenden Austragdruck und einem dafür nicht reichenden Druck verändert, wobei der Ventilauslaß dieses mindestens einen Steuerventiles nicht zum Auslaßkanal bzw. zur Auslaßöffnung, sondern über einen Rücklaufkanal zurück in einen Medienspeicher führt. Hierfür ist kein gesonderter Rücklaufkanal erforderlich, wenn der Einlaß- bzw. Ansaugkanal für die Druckkammer gleichzeitig als Rücklaufkanal verwendet wird. Des weiteren ist auch kein gesondertes Steuerventil erforderlich, wenn dieses durch ein wegabhängig gesteuertes Einlaßventil für die Druckkammer gebildet ist, für die dann kein druckabhängig arbeitendes Einlaßventil erforderlich ist. Auch für den bewegbaren Ventilkörper des Einlaßventiles ist kein gesonderter Bauteil erforderlich, wenn dieser durch einen Pumpkolben, insbesondere einen Vorsaugkolben der Pumpe, gebildet ist. Beim Rückfluß wird das Medium zweimal entgegengesetzt umgelenkt, nämlich zuerst etwa in Austragrichtung aus der Pumpenkammer und dann entgegengesetzt in den Rücklaufkanal.When using a pump, the pressure in the pump chamber is expediently changed by opening and closing a slide-controlled control valve between a discharge pressure reaching for the discharge to the discharge opening and a pressure not sufficient for this, the valve outlet of this at least one control valve not to the outlet channel or to the outlet opening, but leads back to a media store via a return channel. No separate return channel is required for this if the inlet or suction channel for the pressure chamber is also used as the return channel becomes. Furthermore, no separate control valve is required if it is formed by a path-dependent controlled inlet valve for the pressure chamber, for which then no pressure-dependent inlet valve is required. No separate component is required for the movable valve body of the inlet valve if it is formed by a pump piston, in particular a pre-suction piston of the pump. In the case of reflux, the medium is deflected twice in opposite directions, namely first in the discharge direction from the pump chamber and then in the opposite direction into the return channel.

Die erfindungsgemäße Ausbildung eignet sich insbesondere für Austragvorrichtungen nach der DE-OS 37 15 303, auf die wegen weiterer Einzelheiten und Wirkungen Bezug genommen wird. Der erste Leer- bzw. Teilhub beträgt zweckmäßig mehr als ein Neuntel bis ein Viertel oder ein Drittel des Gesamthubes und kann auch etwa der Hälfte des Gesamthubes entsprechen. Um auf dem jeweiligen Teilhub den Aufbau eines ausreichenden Austragdruckes in der Pumpenkammer zu verhindern, braucht der entsprechende Kolben lediglich mit seinem Innenumfang nicht abgedichtet an einem in die Pumpenkammer im wesentlichen frei vorstehenden Einlaßkanal geführt zu werden, wobei der Innenumfang des Kolbens einen entsprechenden Ringabstand vom Außenumfang des Einlaßkanales haben, der Einlaßkanal im Mantel mit Durchlaßöffnungen versehen sein und/oder am Außenumfang über den zugehörigen Längsabschnitt Längskanäle aufweisen kann. In dem Bereich, über welchen in der Pumpenkammer ein Austragdruck erzeugt werden soll, läuft der Kolben jedoch dicht am Außenumfang des Einlaßkanales, der in diesem Bereich keine Durchtrittsöffnungen bzw. Schlitze oder einen erweiterten Bund hat.The training according to the invention is particularly suitable for discharge devices according to DE-OS 37 15 303, to which reference is made for further details and effects. The first idle or partial stroke is expediently more than a ninth to a quarter or a third of the total stroke and can also correspond to approximately half of the total stroke. In order to prevent the build-up of a sufficient discharge pressure in the pump chamber on the respective partial stroke, the corresponding piston does not need to be guided with its inner circumference sealed to an inlet channel which projects substantially freely into the pump chamber, the inner circumference of the piston having a corresponding ring distance from the outer circumference of the inlet channel, the inlet channel in the jacket can be provided with through openings and / or can have longitudinal channels on the outer circumference via the associated longitudinal section. In the area over which a discharge pressure is to be generated in the pump chamber, however, the piston runs close to the outer circumference of the inlet channel, which in this area has no through openings or slots or an enlarged collar.

Der die Steuercharakteristik der Steuermittel bestimmende Bauteil, der z.B. nach Art einer Steuerkurve ausgebildet sein kann, ist zweckmäßig durch einen von einem zugehörigen Trag- bzw. Grundkörper gesonderten Teil gebildet, so daß die Steuercharakteristik durch Wahl dieses Bauteiles beliebig verändert werden kann. Der Bauteil kann z.B. lediglich durch eine Steck- und/oder Schnappverbindung befestigt bzw. in Befestigungslage durch eine Haltefeder festgelegt sein. Zweckmäßig liegt das Steuerventil im wesentlichen vollständig innerhalb der Pumpenkammer.The component which determines the control characteristic of the control means and which is designed, for example, in the manner of a control curve can, is expediently formed by a part separate from an associated support or base body, so that the control characteristic can be changed as desired by selecting this component. The component can, for example, only be fastened by means of a plug-in and / or snap connection or be fixed in the fastening position by a retaining spring. The control valve expediently lies essentially entirely within the pump chamber.

Der Durchlaßquerschnitt des Rücklaufkanales kann hubabhängig veränderbar sein, z.B. dadurch, daß im Anschluß an einen ersten Teilhub in den Rücklaufkanal ein Dorn und/oder ein Teil einer Feder, z.B. einer Wendelfeder, einfährt und dadurch der bei Hubbeginn auf voller Innenweite freie Rücklaufkanal nach einem ersten kurzen Teilhub und vor Schließen des Steuerventiles auf einen Ringkanal begrenzt wird. Der so begrenzte Rücklaufkanal, der durch die Feder auch wendelförmig sein kann, bildet dann eine Rücklaufdrossel, so daß bis zum Schließen des Steuerventiles in der Druckkammer bereits ein Druck aufgebaut wird, dessen Höhe jedoch niedriger liegt als der zur Förderung in den Auslaßkanal erforderliche Austragdruck.The passage cross section of the return channel can be changed depending on the stroke, e.g. in that a mandrel and / or part of a spring, e.g. a helical spring, which means that the return channel, which is free at the beginning of the stroke, is limited to a ring channel after a first short partial stroke and before closing the control valve. The return channel limited in this way, which can also be helical due to the spring, then forms a return throttle, so that a pressure is built up in the pressure chamber by the time the control valve closes, but its level is lower than the discharge pressure required for delivery into the outlet channel.

Ist der Austrag zweier oder mehrerer Medien aus gesonderten Druckkammern und ggf. Speichen vorgesehen, so ist die Austragvorrichtung zweckmäßig entsprechen der DE-OS 37 22 469 ausgebildet, auf die wegen weiterer Einzelheiten und Wirkungen Bezug genommen wird. Die Steuermittel für das erste, zumeist nicht kompressible Medium können dabei so ausgebildet sein, daß während der im wesentlichen kontinuierlichen Förderung des zweiten Mediums mindestens ein Pumpstoß erzeugt wird, mit welchem das erste Medium dem zweiten Medium zugeführt wird. Durch die erfindungsgemäße Ausbildung kann auch eine sehr feine Zerstäubung eines Wirkstoffes erzielt werden. Der Austrag des zweiten Mediums erfolgt zweckmäßig durch druckabhängiges Öffnen eines zugehörigen Ausgangsventiles, so daß die Fördergeschwindigkeit dieses Mediums einen vorbestimmten Wert nicht unterschreitet.If the discharge of two or more media from separate pressure chambers and possibly spokes is provided, the discharge device is expediently designed in accordance with DE-OS 37 22 469, to which reference is made for further details and effects. The control means for the first, mostly non-compressible medium can be designed so that at least one pump pulse is generated during the essentially continuous conveying of the second medium, with which the first medium is supplied to the second medium. A very fine atomization of an active ingredient can also be achieved by the inventive design. The second medium is expediently discharged by pressure-dependent opening an associated output valve so that the conveying speed of this medium does not fall below a predetermined value.

Diese und weitere Merkmale gehen außer aus den Ansprüchen auch aus der Beschreibung und den Zeichnungen hervor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen bei einer Ausführungsform der Erfindung und auf anderen Gebieten verwirklicht sein und vorteilhafte sowie für sich schutzfähige Ausführungen darstellen können, für die hier Schutz beansprucht wird. Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden näher erläutert. In den Zeichnungen zeigen:

Fig. 1
eine erfindungsgemäße Austragvorrichtung in teilweise geschnittener Ansicht,
Fig. 2
einen Ausschnitt der Austragvorrichtung in einer Vergrößerung und
Fig. 3
den Ausschnitt gemäß Fig. 2, jedoch in einer Arbeitsstellung.
These and further features emerge from the claims and also from the description and the drawings, the individual features being realized individually or in groups in the form of sub-combinations in one embodiment of the invention and in other fields and being advantageous and capable of being protected Can represent designs for which protection is claimed here. An embodiment of the invention is shown in the drawings and is explained in more detail below. The drawings show:
Fig. 1
a discharge device according to the invention in a partially sectioned view,
Fig. 2
a section of the discharge device in an enlargement and
Fig. 3
the section of FIG. 2, but in a working position.

Die im wesentlichen aus Kunststoff-Spritzteilen zusammengesteckte Austragvorrichtung 1 dient zum im wesentlichen abgedichteten Aufsetzen auf den Hals eines Speichers, aus dem mit jedem Rückhub eine bestimmte Menge eines Mediums über ein Steigrohr von einer Austrageinheit 3 angesaugt wird. Sie weist außerdem aus der Atmosphäre unter Umgehung einer Schubkolben-Pumpe 5 der Austrageinheit 3 ansaugende Fördermittel 4 für Druckluft auf, die im wesentlichen durch eine achsgleich zur Pumpe 5 am selben Grundkörper 2 angeordnete Schubkolben-Pumpe 6 gebildet sind. Beide Pumpen 5, 6 sind im wesentlichen simultan mit einer gemeinsamen Betätigung 7 über einen Austrag- und Betätigungskopf 8 durch Fingerdruck so zu betätigen, daß eine Schubbetätigung auf die Pumpbewegung übertragen wird.The discharge device 1, which is essentially assembled from injection-molded plastic parts, is used for essentially sealed placement on the neck of a storage device, from which, with each return stroke, a certain amount of a medium is drawn in by a discharge pipe 3 via a riser pipe. It also has, from the atmosphere, bypassing a thrust piston pump 5 of the discharge unit 3, conveying means 4 for compressed air, which are essentially formed by a thrust piston pump 6 arranged on the same base body 2 in the same axis as the pump 5. Both pumps 5, 6 are essentially simultaneous with a common actuation 7 via a discharge and Actuate actuating head 8 by finger pressure so that a push actuation is transmitted to the pump movement.

Der Betätigungskopf 8 weist eine ins Freie mündende Austragöffnung 9 auf, die, beeinflußt durch Steuermittel 10, über einen Auslaßkanal 11 an die Austrageinheit 3 sowie über einen gesonderten, nahe vor ihr mündenden Kanal an die näher bei ihr liegenden Fördermittel 4 angeschlossen ist.The actuating head 8 has a discharge opening 9 opening into the open, which, influenced by control means 10, is connected to the discharge unit 3 via an outlet channel 11 and via a separate channel which opens near it to the conveyor 4 closer to it.

Ein einteilig mit dem Grundkörper 2 ausgebildetes Zylindergehäuse 12 nimmt eine Kolbeneinheit 13 auf, die durch zwei gesonderte, gegeneinander axial bewegbare und ständig ineinander greifende Pumpkolben 14, 15 der Austrageinheit 3 gebildet ist. Dem Innenumfang des in Richtung des Pumphubes etwa um die Hälfte seiner Länge über den anderen Pumpkolben 15 vorstehenden Pumpkolbens 14 ist als Kolbenlaufbahn 16 eine Außenumfangsfläche zugeordnet. Der Innenumfang des Zylindergehäuses 12 bildet eine Zylinderlaufbahn 17 zur abgedichteten Anlage des vorderen Endes des Pumpkolbens 15, der ebenso wie der Pumpkolben 14 topfförmig ausgebildet, jedoch wesentlich kürzer ist. Zwischen der Zylinderlaufbahn 17 und dem Außenumfang des vorderen, erweiterten Abschnittes des Pumpkolbens 14 ist ebenso ein Ringspalt gebildet wie zwischen dem Innenumfang des Pumpkolbens 15 und dem Außenumfang des Pumpkolbens 14; die hintereinanderliegenden Ringspalte stellen eine Leitungsverbindung für den Auslaßkanal 11 dar.A cylinder housing 12 which is formed in one piece with the base body 2 accommodates a piston unit 13 which is formed by two separate pump pistons 14, 15 of the discharge unit 3 which are axially movable relative to one another and constantly mesh with one another. The inner circumference of the pump piston 14 projecting in the direction of the pump stroke by about half its length over the other pump piston 15 is assigned an outer circumferential surface as a piston raceway 16. The inner circumference of the cylinder housing 12 forms a cylinder raceway 17 for the sealed abutment of the front end of the pump piston 15, which, like the pump piston 14, is cup-shaped, but is considerably shorter. An annular gap is formed between the cylinder race 17 and the outer circumference of the front, enlarged section of the pump piston 14 as well as between the inner circumference of the pump piston 15 and the outer circumference of the pump piston 14; the successive annular gaps represent a line connection for the outlet channel 11.

Mit dem der Kolbeneinheit 13 auf der von den Fördermitteln 4 abgekehrten Seite gegenüberliegenden Ende bildet das Zylindergehäuse 12 einen Einlaß, über welchen die Pumpe 5 durch ein Steigrohr aus dem Speicher ansaugt und über den sie, gesteuert durch die Steuermittel 10, in den Speicher zurückfördern kann. Dieser Einlaß bildet einen im wesentlichen vollständig innerhalb des Zylindergehäuses 12 bzw. der Zylinderlaufbahn 17 und im wesentlichen achsgleich zu diesen liegenden Einlaß- und Rücklauf-Kanal 18, dessen Durchflußquerschnitt hubabhängig veränderbar ist. Der Kanal 18 ist von einer im wesentlichen frei und achsgleich in das Zylindergehäuse vorstehenden Hülse 19 begrenzt, deren Außenumfang radialen Abstand von der Zylinderlaufbahn 17 hat und mit einer inneren Dichtlippe 21 am vorderen Ende des Pumpkolbens 14 ein Steuerventil 20 bildet. Die an der Kolbenlaufbahn 17 laufende Dichtlippe 22 befindet sich am vorderen Ende des Pumpkolbens 15.With the end opposite the piston unit 13 on the side facing away from the conveying means 4, the cylinder housing 12 forms an inlet, through which the pump 5 draws in from the reservoir through a riser pipe and via which it, controlled by the control means 10, can convey back into the reservoir . This inlet forms a substantially completely within the cylinder housing 12 and the cylinder race 17 and essentially in line with these lying inlet and return channel 18, the flow cross section can be changed depending on the stroke. The channel 18 is delimited by a sleeve 19 projecting essentially freely and coaxially into the cylinder housing, the outer circumference of which has a radial distance from the cylinder race 17 and forms a control valve 20 with an inner sealing lip 21 at the front end of the pump piston 14. The sealing lip 22 running on the piston raceway 17 is located at the front end of the pump piston 15.

Der Außenumfang der Hülse 19 bildet zwischen deren Enden und nur auf einem Teil seiner von der Dichtlippe 21 überfahrenen Länge einen Ventilsitz 23 für die abgedichtet verschiebbare Anlage der Dichtlippe 21. Zu diesem Zweck ist die Hülse 19 auf den zugehörigen Abschnitt mit einem radial gegen die Zylinderlaufbahn 17 vorspringenden Bund 24 versehen. An das beim Pumphub zuerst von der Dichtlippe 21 erreichte Ende des zylindrischen Ventilsitzes 23 schließt eine spitzwinklig kegelstumpfförmige Schrägfläche 25 an, während das andere Ende durch eine annähernd rechtwinklig zum Ventilsitz 23 liegende Ringschulter 26 begrenzt ist. Die benachbart zum Bund 24 liegenden Abschnitte 27, 28 können im wesentlichen gleiche und bis zum jeweils zugehörigen Ende annähernd konstant durchgehende Außenweite derart haben, daß zwischen ihnen und der Dichtlippe 21 ein Ringspalt begrenzt ist. Gleiche Außenweite hat auch ein durch ein vorderes Ende gebildeter Steckabschnitt 29, mit welchem die Hülse 19 in eine eng angepaßte, gegenüber der Zylinderlaufbahn 17 verengte und an diese über eine Ringschulter anschließende Öffnung des Zylindergehäuses 17 anschlagbegrenzt eingesteckt ist.The outer circumference of the sleeve 19 forms a valve seat 23 between the ends and only over a part of its length over which the sealing lip 21 has been passed, for the sealingly displaceable contact of the sealing lip 21. For this purpose, the sleeve 19 is on the associated section with a radial against the cylinder track 17 projecting collar 24 provided. At the end of the cylindrical valve seat 23, which was first reached by the sealing lip 21 during the pumping stroke, is followed by an obliquely frusto-conical inclined surface 25, while the other end is delimited by an annular shoulder 26 lying approximately at right angles to the valve seat 23. The sections 27, 28 lying adjacent to the collar 24 can have essentially the same outer width, which is approximately constant through to the respective associated end, such that an annular gap is delimited between them and the sealing lip 21. The same outside width also has a plug-in section 29 formed by a front end, with which the sleeve 19 is inserted in a tightly adapted manner, narrowed relative to the cylinder race 17 and adjoining it via an annular shoulder, with an opening of the cylinder housing 17 which is limited by a stop.

Der Schieber bzw. Kolben 14 bildet mit der Hülse 19 eine Drossel 30, deren Durchflußquerschnitt sich wegabhängig mit der Lage der Pumpkolbens 14 ändert. Der Mantel des Pumpkolbens 14 ist im Abstand hinter der Dichtlippe 21 am Innenumfang so verengt, daß er mit dem Außenumfang des Abschnittes 27 einen gegenüber dem Ringspalt im Bereich der Dichtlippe 21 engeren Ringspalt begrenzen kann. Außerdem steht über die Innenseite der Stirnwand des Pumpkolbens 14 ein vollständig innerhalb des Pumpkolbens 14 liegender Dorn 31 vor, dessen vorderes Ende gegenüber der Dichtlippe 21 zurückversetzt ist. Auf den Außenumfang des Dornes 31 ist das Ende einer vorgespannten Schraubendruck-Feder 32 eng anliegend aufgesteckt, die als einzige Feder für alle Rückstellfunktionen der Austrageinheit 3 sowie für die Pumpenrückstellung der Fördermittel 4 vorgesehen ist. Das andere Ende der Feder 32 ist innerhalb des Steckabschnittes 29 an einer Ringschulter abgestützt und drückt daher die an das Steigrohr angeschlossene Hülse 19 in ihre Anschlaglage. Die Feder 32 liegt mit ihrem Außenumfang eng am Innenumfang des Kanales 18 an. In Ausgangslage gemäß den Figuren 1 und 2 liegt das freie Ende 33 der Hülse 19 innerhalb des Pumpkolbens 14 mit geringem Abstand hinter der Dichtlippe 21 und mit geringem Abstand dem vorderen Ende des Dornes 31 gegenüber.The slide or piston 14 forms with the sleeve 19 a throttle 30, the flow cross section of which changes with the position of the pump piston 14 depending on the path. The jacket of the pump piston 14 is so narrowed at a distance behind the sealing lip 21 on the inner circumference that with the outer circumference of the section 27 it can limit an annular gap which is narrower than the annular gap in the region of the sealing lip 21. In addition, beyond the inside of the end wall of the pump piston 14, a mandrel 31 lies completely inside the pump piston 14, the front end of which is set back relative to the sealing lip 21. The end of a pretensioned helical compression spring 32 is fitted snugly on the outer circumference of the mandrel 31 and is provided as the only spring for all resetting functions of the discharge unit 3 and for the pump resetting of the conveying means 4. The other end of the spring 32 is supported within the plug section 29 on an annular shoulder and therefore presses the sleeve 19 connected to the riser pipe into its stop position. The spring 32 lies with its outer circumference closely on the inner circumference of the channel 18. In the starting position according to FIGS. 1 and 2, the free end 33 of the sleeve 19 lies within the pump piston 14 at a short distance behind the sealing lip 21 and at a short distance from the front end of the mandrel 31.

Wird der Pumpkolben 14 über einen ersten, diesem Abstand entsprechenden Teilhub 38 bewegt, so dringt das vordere Ende des Dornes 31 in den Kanal 18 ein, so daß durch die dazwischen liegenden Windungen der Feder 32 ein im Querschnitt über den Außenumfang im wesentlichen geschlossener wendelförmiger Kanal innerhalb der Hülse 19 und anschließend an das Ende 33 begrenzt ist, dessen Durchflußquerschnitt kleiner als der des Ringspaltes im Bereich der Dichtlippe 21 sein kann. Der Teilhub 38 liegt am Beginn eines ersten Teilhubes 34, welcher benötigt wird, bis die Dichtlippe 21 den Beginn der Schrägfläche 25 erreicht hat. Über den nun anschließenden Teilhub 35 wird der Ringspalt im Bereich der Dichtlippe 21 stetig enger, bis die Dichtlippe 21 auf die Schrägfläche 25 aufläuft und dadurch die Verbindung zwischen dem Kanal 18 und der ringförmigen Pumpenkammer 39 schließt. Etwa im selben Augenblick oder kurz danach gelangt das Ende 33 der Hülse 19 in den verengten Abschnitt des Pumpkolbens 14, so daß beide Teile aneinander geführt und in dem hohlen Pumpkolben 14 befindliche Flüssigkeit weiter durch den Kanal 18 zurück in den Speicher gepreßt werden kann.If the pump piston 14 is moved over a first partial stroke 38 corresponding to this distance, the front end of the mandrel 31 penetrates into the channel 18, so that a helical channel which is essentially closed in cross section over the outer circumference is penetrated by the windings of the spring 32 lying therebetween is limited within the sleeve 19 and then to the end 33, the flow cross section of which can be smaller than that of the annular gap in the region of the sealing lip 21. The partial stroke 38 lies at the beginning of a first partial stroke 34, which is required until the sealing lip 21 has reached the beginning of the inclined surface 25. Via the subsequent partial stroke 35, the annular gap in the area of the sealing lip 21 becomes continuously narrower until the sealing lip 21 runs onto the inclined surface 25 and thereby the connection between the channel 18 and the annular pump chamber 39 closes. At about the same moment or shortly thereafter, the end 33 of the sleeve 19 reaches the narrowed section of the pump piston 14, so that both parts can be brought together and the liquid in the hollow pump piston 14 can be pressed further through the channel 18 back into the reservoir.

Die Dichtlippe 21 gelangt dann unter radialer Vorspannung auf den zylindrischen Ventilsitz 23, der den nächsten anschließenden Teilhub 36 bestimmt und über welchen nunmehr in der Pumpenkammer 39 ein Förder- bzw. Austragdruck aufgebaut wird. Das Medium kann hierbei aus der Pumpenkammer 39 über die genannten Ringspalte am Außenumfang des Pumpkolbens 14 zum Auslaßkanal 11 gefördert werden. Sobald die Dichtlippe 21 an der Ringschulter 26 das Ende des Ventilsitzes 23 erreicht hat, kann - je nach gewählten Abmessungen - die Leitungsverbindung zwischen der nunmehr wesentlich verengten Pumpenkammer 39 und dem Kanal 18 wieder, ggf. gedrosselt, geöffnet werden oder geschlossen bleiben.The sealing lip 21 then reaches the cylindrical valve seat 23 under radial prestress, which determines the next subsequent partial stroke 36 and via which a delivery or discharge pressure is now built up in the pump chamber 39. The medium can be conveyed from the pump chamber 39 to the outlet channel 11 via the annular gaps mentioned on the outer circumference of the pump piston 14. As soon as the sealing lip 21 on the annular shoulder 26 has reached the end of the valve seat 23, the line connection between the pump chamber 39, which is now substantially constricted, and the channel 18 can be opened again, if necessary throttled, opened or closed, depending on the dimensions selected.

Geöffnet wird die Leitungsverbindung hierbei, wenn der Außenumfang des Abschnittes 27 kleiner als der verengte Innenumfang des Pumpkolbens 14 ist, weil dann ein ringförmiger Durchtrittsspalt gegeben ist. Geschlossen wird die Leitungsverbindung, wenn die Außenweite des Abschnittes 27 etwa gleich groß wie der verengte Innenumfang ist. Da an das entsprechende Ende des Ventilsitzes 23 eine rechtwinklige oder allenfalls stumpfwinklige konische Schulter 26 anschließt, wird der Ringspalt zwischen der Dichtlippe 21 beim Überfahren dieses Endes schlagartig geöffnet. Ab diesem Ende erfolgt noch der letzte Teilhub 37, bis der Pumpkolben 14 am Ende 33 der Hülse 19 anschlägt und sich die Dichtlippe 21 noch in geringer Entfernung vom Boden bzw. der zugehörigen Ringschulter der Pumpenkammer 39 befindet.The line connection is opened here when the outer circumference of section 27 is smaller than the narrowed inner circumference of pump piston 14 because an annular passage gap is then provided. The line connection is closed when the outer width of section 27 is approximately the same size as the narrowed inner circumference. Since a right-angled or at most obtuse-angled conical shoulder 26 adjoins the corresponding end of the valve seat 23, the annular gap between the sealing lip 21 is suddenly opened when this end is passed over. From this end, the last partial stroke 37 takes place until the pump piston 14 strikes the end 33 of the sleeve 19 and the sealing lip 21 is still a short distance from the floor or the associated annular shoulder of the pump chamber 39.

Im Bereich des Inneren, an das Innere des Pumpkolbens 15 anschließenden Endes des Auslaßkanales 11 befindet sich ein durch die Feder 32 zur Schließstellung vorgespanntes Auslaßventil 40, dessen gegeneinander bewegbare Ventilteile an den beiden Pumpkolben 14, 15 vorgesehen sind. Der kegelige Ventilkörper 44 ist einteilig mit der den Pumpkolben 14 am verengten, zylindrischen Kolbenabschnitt 41 abschließenden Stirnwand 42 ausgebildet und steht mit seiner Basis über deren Außenseite vor. An der Innenseite dieser Stirnwand 42 schlägt das Ende 33 an und ist die Feder 32 abgestützt. Das engere Ende des Ventilkörpers 44 geht einteilig in einen über den größten Teil der Länge des Auslaßkanales 11 reichenden Schaft 46 über, der durch Einstecken in einen Zentralkanal eines Kolbenstößels 47 gelagert ist und mit diesem einen im Querschnitt ringförmigen Abschnitt des Auslaßkanales 11 begrenzt. Der Pumpkolben 14 ist somit in Ausgangslage nur durch den Ventilkörper 44 gegenüber den übrigen Pumpenteilen zentriert und kann dann auf den entsprechenden Teilhüben 35 bis 37 durch Führung an der Schrägfläche 25, am Ventilsitz 23 und/oder am Abschnitt 27 geführt sein, so daß auch bei geöffnetem Auslaßventil 40 eine genaue Zentrierung gewährleistet ist.In the region of the interior, at the end of the outlet channel 11 adjoining the interior of the pump piston 15, there is an outlet valve 40 which is biased by the spring 32 to the closed position and whose valve parts can be moved against one another on the two pump pistons 14, 15. The tapered valve body 44 is formed in one piece with the end wall 42 which closes off the pump piston 14 at the narrowed, cylindrical piston section 41 and projects with its base beyond the outside thereof. The end 33 abuts on the inside of this end wall 42 and the spring 32 is supported. The narrower end of the valve body 44 merges in one piece into a shaft 46 which extends over most of the length of the outlet channel 11 and which is mounted by inserting it into a central channel of a piston rod 47 and with it delimits a section of the outlet channel 11 which is annular in cross section. The pump piston 14 is thus centered in the starting position only by the valve body 44 relative to the other pump parts and can then be guided on the corresponding partial strokes 35 to 37 by guiding on the inclined surface 25, on the valve seat 23 and / or on the section 27, so that also open outlet valve 40 accurate centering is ensured.

Das Auslaßventil 40 ist so justiert, daß es gegen die Kraft der Feder 32 öffnet, wenn die Dichtlippe 21 auf dem Ventilsitz 23 läuft, so daß dann das Medium aus der Pumpenkammer 39 in einem Pumpstoß zur Austragöffnung 9 gefördert wird. Sobald die Dichtlippe am Ende des Teilhubes 36 den Ventilsitz 23 überlaufen hat, wird die Pumpenkammer 39 durch Rückförderung in den Kanal 18 druckentlastet, so daß der auf die hinteren Stirnflächen des Pumpkolbens 14 wirkende ÖffnEnde des Teilhubes 37, weil die in der Pumpenkammer 51 der Pumpe 6 durch die Betätigung komprimierte Luft auch nach dem Betätigungsende bis zur Erreichung eines Druck-Grenzwertes noch weiterströmt. Die Pumpenkammer 51 ist von einem am Grundkörper 2 mit einer Schnappverbindung im wesentlichen lagefest angeordneten Pumpkolben 48 und einem Pumpenzylinder 49 begrenzt, welcher durch den Mantel des Betätigungskopfes 8 gebildet ist. Der Pumpkolben 48 ist vom Auslaßkanal 11 bzw. vom Betätigungsstößel 47 durchsetzt. In dem dem Pumpkolben 48 gegenüberliegenden Ausgang der Pumpenkammer 51 ist ein druckabhängig arbeitendes Ausgangsventil 50 vorgesehen, das nach einem ersten Teilhub und vor Erreichen des Teilhubes 36 öffnet.The outlet valve 40 is adjusted so that it opens against the force of the spring 32 when the sealing lip 21 runs on the valve seat 23, so that the medium is then pumped out of the pump chamber 39 to the discharge opening 9. As soon as the sealing lip at the end of the partial stroke 36 has overflowed the valve seat 23, the pump chamber 39 is relieved of pressure by returning it to the channel 18, so that the opening end of the partial stroke 37 acting on the rear end faces of the pump piston 14, because that in the pump chamber 51 of the pump 6 Compressed air continues to flow even after the end of the actuation until a pressure limit value is reached. The pump chamber 51 is of a on the base body 2 with a snap connection in the essentially fixed pump piston 48 and a pump cylinder 49, which is formed by the jacket of the actuating head 8. The pump piston 48 is penetrated by the outlet channel 11 or by the actuating plunger 47. In the outlet of the pump chamber 51 opposite the pump piston 48, a pressure-dependent output valve 50 is provided, which opens after a first partial stroke and before the partial stroke 36 is reached.

Im wesentlichen alle Teile der Austragvorrichtung können von einer Seite des Grundkörpers 2, nämlich von der offenen Seite des Zylindergehäuses 12 her durch Stecken eingesetzt und montiert werden. Da die Pumpkolben 14, 15 im wesentlichen ebene Stirnwände 42, 43 aufweisen und der Ventilsitz 45 annähernd in der Ebene der Innenseite der Stirnwand 43 liegt, werden auch für die Kolbeneinheit 13 sehr kompakte Abmessungen erzielt. Die Pumpkolben 14, 15 haben im Mantelbereich im wesentlichen nur zylindrische Außen- und/oder Innenformen. Der Pumpkolben 48 ist mit einer Schnappverbindung befestigt und bildet einen Verschluß für die hintere Montageöffnung des Zylindergehäuses 12.Essentially all parts of the discharge device can be inserted and installed from one side of the base body 2, namely from the open side of the cylinder housing 12, by plugging. Since the pump pistons 14, 15 have essentially flat end walls 42, 43 and the valve seat 45 lies approximately in the plane of the inside of the end wall 43, very compact dimensions are also achieved for the piston unit 13. The pump pistons 14, 15 have essentially only cylindrical outer and / or inner shapes in the jacket area. The pump piston 48 is fastened with a snap connection and forms a closure for the rear mounting opening of the cylinder housing 12.

Die Austragvorrichtung kann auch in einfacher Weise hinter der in Ausgangstellung stehenden Dichtlippe 22 eine über die Pumpenkammer 51 gespeiste Belüftung 52 für das Speichergefäß haben, die zumindest in Ausgangstellung durch ein Belüftungsventil 53 dicht geschlossen ist. Zu diesem Zweck bildet die Stirnwand 43 des Pumpkolbens 15 an ihrer Außenseite einen einteiligen, kegeligen Ventilkörper, der unter der Kraft der Feder 32 gegen einen Ventilsitz gedrückt wird, wobei die Schließkraft im wesentlichen nur über die aneinanderliegenden Ventilteile des Auslaßventiles 40 übertragen wird. Zweckmäßig ist der Ventilsitz durch eine in das hintere, erweiterte Ende des Zylindergehäuses 12 eingreifende und vom Betätigungsstößel 47 durchsetzte Manschette 54 des Pumpkolbens 48 gebildet, so daß er aus einem verhältnismäßig weichen Material bestehen kann. Der ringförmige Belüftungskanal führt von der Pumpenkammer 51 zwischen der Manschette 54 und dem Betätigungsstößel 47 zum Belüftungsventil 53 und von dort benachbart zum Pumpkolben 15 quer durch den Mantel des Zylindergehäuses 12 in einen Ringspalt, der zwischen dem Außenumfang des hinteren Endes des Zylindergehäuses 12 und den Innenumfang einer dieses im Radialabstand umgebenden Flanschmuffe 55 des Grundkörpers 2 gebildet ist. Auf diese Flanschmuffe 55 ist eine Kappe 56, z.B. eine Schraub- und/oder Steckkappe zur Befestigung der Austragvorrichtung 1 am Flaschenhals oder dgl. des Speichers anschlagbegrenzt aufgesetzt. Der Speicher kann aber auch flexibel mit der Austragvorrichtung verbunden sein.The discharge device can also have, in a simple manner behind the sealing lip 22 which is in the starting position, a ventilation 52 for the storage vessel which is fed via the pump chamber 51 and which, at least in the starting position, is tightly closed by a ventilation valve 53. For this purpose, the end wall 43 of the pump piston 15 forms on its outside a one-piece, conical valve body, which is pressed under the force of the spring 32 against a valve seat, the closing force being transmitted essentially only via the valve parts of the exhaust valve 40 lying against one another. The valve seat is expediently formed by a sleeve 54 of the pump piston 48 which engages in the rear, enlarged end of the cylinder housing 12 and is penetrated by the actuating plunger 47, so that it can be made of a relatively soft material. The annular ventilation channel leads from the pump chamber 51 between the sleeve 54 and the actuating plunger 47 to the ventilation valve 53 and from there adjacent to the pump piston 15 across the jacket of the cylinder housing 12 into an annular gap which is between the outer periphery of the rear end of the cylinder housing 12 and the inner periphery a flange sleeve 55 of the base body 2 which surrounds this at a radial distance is formed. On this flange sleeve 55, a cap 56, for example a screw and / or plug cap for attaching the discharge device 1 to the bottle neck or the like of the memory. The memory can also be flexibly connected to the discharge device.

Über das Belüftungsventil 53 kann der Speicherraum des Speichergefäßes mit der Pumpe 6 unter Druck gesetzt werden, so daß beim Beginn des Rückhubes der Pumpe 5 das gespeicherte Medium durch den Kanal 18 in die Pumpenkammer 39 gedrückt oder zumindest das Ansaugen des Mediums unterstützt wird. Während des Pumphubes ergibt sich durch die beschriebenen Steuermittel 10 ein sich stufenartig an den Auslaßdruck des Auslaßventiles 40 annähernder Druckaufbau, so daß bei Beginn des Teilhubes 36 sehr schnell die Öffnung des Auslaßventiles 40 erreicht wird.Via the ventilation valve 53, the storage space of the storage vessel can be pressurized with the pump 6, so that the stored medium is pressed through the channel 18 into the pump chamber 39 at the beginning of the return stroke of the pump 5 or at least the suction of the medium is supported. During the pumping stroke, the control means 10 described result in a pressure build-up that gradually approaches the outlet pressure of the outlet valve 40, so that the opening of the outlet valve 40 is reached very quickly at the beginning of the partial stroke 36.

Claims (10)

Austragvorrichtung für Medien mit einem Grundkörper (2) für mindestens eine Medien-Austrageinheit (3), die mit einer Betätigung (7) zwischen einem Hubausgang und einem Hubende über einen Betätigungshub zu betätigen und insbesondere durch eine Pumpe (5) mit einer Pumpenkammer (39) für eine Medienförderung gebildet ist, gekennzeichnet durch Steuermittel (10) zur Beeinflussung der Mediumförderung.Discharge device for media with a base body (2) for at least one media discharge unit (3), which can be actuated by an actuation (7) between a stroke output and a stroke end via an actuation stroke and in particular by a pump (5) with a pump chamber (39 ) is formed for media funding, characterized by control means (10) for influencing the media funding. Austragvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Steuermittel (10) zur mindestens zweimaligen hubabhängigen Unterbrechung der Medienförderung zwischen dem Hubausgang und dem Hubende eines Betätigungshubes vorgesehen sind und daß insbesondere die Medienförderung über einen im wesentlichen an den Hubausgang anschließenden Teilhub (54) und/oder über einen im wesentlichen bis zum Hubende reichenden Teilhub (37) unterbrochen bzw. über den im wesentlichen verbindenden Teilhub (35, 36) in Gang gesetzt ist, wobei vorzugsweise die Steuermittel (10) zur Druckentlastung der Pumpenkammer (39) auf mindestens einem Teilhub (34, 37) durch Öffnung einer Rückförderung für das Medium aus der Pumpenkammer (39) ausgebildet sind.Discharge device according to claim 1, characterized in that the control means (10) are provided for at least two stroke-dependent interruption of the media conveyance between the stroke output and the stroke end of an actuating stroke, and in particular that the media conveyance is carried out via a partial stroke (54) essentially adjoining the stroke exit and / or interrupted via a partial stroke (37) which extends essentially to the end of the stroke or is started via the essentially connecting partial stroke (35, 36), preferably the Control means (10) for relieving the pressure of the pump chamber (39) on at least one partial stroke (34, 37) are formed by opening a return feed for the medium from the pump chamber (39). Austragvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Steuermittel (10) wenigstens ein schieberartig über den Pumphub mindestens zweimal hubabhängig öffnendes und wenigstens einmal schließendes Steuerventil (20), wie ein Einlaßventil für die Pumpenkammer (39), aufweist, das insbesondere durch eine Kolbenlaufbahn (16) und eine an dieser öffnend und schließend laufende Kolben-Dichtlippe (21) eines Kolbens einer Kolbeneinheit (13) gebildet ist und daß vorzugsweise das Steuerventil (20) als gegenüber dem Grundkörper (2) im wesentlichen feststehenden Ventilsitz (23) eine Mantelfläche an einem Außenumfang und als bewegbaren Ventilkörper eine am Ventilsitz (23) wenigstens in Schließstellung anliegende Steuerhülse aufweist, wobei insbesondere ein Ventil-Kanal (18) innerhalb des Außenumfanges aus der Pumpenkammer (39) geführt, und/oder durch einen Einlaß-Kanal (18) der Pumpenkammer (39) gebildet ist.Discharge device according to claim 1 or 2, characterized in that the control means (10) has at least one control valve (20) which opens and closes at least twice depending on the stroke and slides via the pump stroke, such as an inlet valve for the pump chamber (39), in particular by a piston raceway (16) and a piston sealing lip (21) of a piston of a piston unit (13) that opens and closes on it, and that the control valve (20) is preferably a valve seat (23) that is essentially fixed with respect to the base body (2) has a lateral surface on an outer circumference and, as a movable valve body, has a control sleeve which bears against the valve seat (23) at least in the closed position, in particular a valve channel (18) being guided out of the pump chamber (39) within the outer circumference and / or through an inlet channel (18) of the pump chamber (39) is formed. Austragvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Steuermittel (10) zur allmählichen bzw. abgestuften Druckerhöhung in der Pumpenkammer (39) und/oder zur abrupten Druckentlastung der Pumpenkammer (39) ausgebildet sind, daß insbesondere der Ventilsitz (23) eine zu einem Ende einer Ventilschließfläche schräg ansteigende Steuerfläche (25) und am anderen Ende der Ventilschließfläche eine abgesetzte Schulter (26) aufweist und daß vorzugsweise mindestens ein die hubabhängige Unterbrechung bestimmendes Steuerglied der Steuermittel (10) durch einen von dem Grundkörper (2) gesonderten, insbesondere einteiligen, und/oder mit einer Steckverbindung (29) befestigten, Bauteil gebildet bzw. als frei in einen Zylindermantel ragende Hülse (19) ausgebildet ist, die am Außenumfang einen erweiterten Bund (24) aufweist.Discharge device according to one of the preceding claims, characterized in that the control means (10) are designed for a gradual or graduated pressure increase in the pump chamber (39) and / or for abrupt pressure relief of the pump chamber (39), that in particular the valve seat (23) to one end of a valve closing surface sloping control surface (25) and at the other end of the valve closing surface a stepped shoulder (26) and that preferably at least one control element determining the stroke-dependent interruption of the control means (10) is formed by a component separate from the base body (2), in particular in one piece and / or fastened with a plug connection (29) or as free in a sleeve (19) projecting from the cylinder jacket is formed, which has an enlarged collar (24) on the outer circumference. Austragvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Pumpenkammer (39) wenigstens teilweise ringförmig und am Innenumfang von einer einen Einlaß bildenden Hülse (19) begrenzt ist, deren Außenumfang vorzugsweise mit einer inneren Dichtlippe (21) das Steuerventil (20) bildet, wobei der radial äußere Innenumfang der Pumpenkammer (39) als Zylinderlaufbahn (17) für eine etwa achsgleich zur inneren Dichtlippe (21) und insbesondere im Abstand hinter dieser liegende äußere Dichtlippe (22) der Kolbeneinheit (13) ausgebildet ist.Discharge device according to one of the preceding claims, characterized in that the pump chamber (39) is at least partially annular and is delimited on the inner circumference by a sleeve (19) forming an inlet, the outer circumference of which preferably forms the control valve (20) with an inner sealing lip (21) , The radially outer inner circumference of the pump chamber (39) being designed as a cylinder raceway (17) for an outer sealing lip (22) of the piston unit (13) which is approximately coaxial with the inner sealing lip (21) and in particular at a distance behind it. Austragvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Steuermittel (10) für eine Rückförderung aus der Pumpenkammer (39) und/oder für einen abgestuften Druckaufbau in der Pumpenkammer (39) mindestens eine hubabhängig veränderbare Drossel (30) aufweisen, die vorzugsweise mit ineinander bewegbaren Gliedern zur Bildung eines ringförmigen Rückförderspaltes versehen ist.Discharge device according to one of the preceding claims, characterized in that the control means (10) for a return flow from the pump chamber (39) and / or for a graduated pressure build-up in the pump chamber (39) have at least one throttle (30) which can be varied as a function of stroke, which preferably is provided with mutually movable members to form an annular return gap. Austragvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Pumpenkammer (39) an einen Auslaßkanal (11) bzw. eine Austragöffnung (9) über ein druckabhängig öffnendes Auslaßventil (40) angeschlossen ist, dessen Ventilteile insbesondere durch zwei gegen die Kraft einer Pumpenrückstell-Feder (32) gegeneinander bewegbare Kolben (14, 15) der Kolbeneinheit (13) gebildet sind, die die innere und die äußere Dichtlippe (21, 22) aufweisen, wobei vorzugsweise die Steuermittel (10) zur hubabhängigen Schließung des insbesondere ausschließlich bei geschlossenem Steuerventil (20) geöffneten Auslaßventiles (40) ausgebildet sind und/oder das Auslaßventil (40) im wesentlichen in der Bodenfläche eines hinteren, napfförmigen Kolbens (15) liegt, der insbesondere mit einem im wesentlichen zylindrischen Kolbenmantel annähernd bis an eine Ringschulter am Außenumfang des vorderen Kolbens (14) reicht.Discharge device according to one of the preceding claims, characterized in that the pump chamber (39) is connected to an outlet channel (11) or a discharge opening (9) via a pressure-dependent opening outlet valve (40), the valve parts of which are reset, in particular, by two against the force of a pump - Spring (32) against each other movable pistons (14, 15) of the piston unit (13) are formed, which have the inner and the outer sealing lip (21, 22), preferably the control means (10) for stroke-dependent closing of the in particular exclusively when closed Control valve (20) open exhaust valve (40) are formed and / or the exhaust valve (40) is substantially in the bottom surface of a rear, cup-shaped piston (15), which in particular with a substantially cylindrical piston jacket approximately to an annular shoulder on the outer circumference of the front piston (14) is sufficient. Austragvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß Fördermittel (4) zum Austrag mindestens eines zweiten Mediums, wie Druckluft, vorgesehen sind und daß die Steuermittel (10) insbesondere zur Erzeugung eines Pumpstoßes aus der Pumpenkammer (39) zwischen einem ggf. druckabhängigen Förderbeginn und einem Förderende der Fördermittel (4) vorgesehen sind, wobei vorzugsweise die Fördermittel (4) gemeinsam mit der Betätigung (7) zu betätigen und insbesondere durch eine im wesentlichen achsgleich zur Medien-Pumpe (5) liegende zweite Pumpe (6) gebildet sind, die über ein Ausgangsventil (50) nahe benachbart zur gemeinsamen Austragöffnung (9) an den Auslaßkanal (11) angeschlossen ist.Discharge device according to one of the preceding claims, characterized in that conveying means (4) are provided for discharging at least one second medium, such as compressed air, and in that the control means (10) in particular for generating a surge from the pump chamber (39) between a pressure-dependent one, if appropriate Start of conveyance and end of conveyance of the conveying means (4) are provided, wherein preferably the conveying means (4) are to be actuated together with the actuation (7) and in particular are formed by a second pump (6) which is essentially coaxial with the media pump (5) which are close to the outlet valve (50) common discharge opening (9) is connected to the outlet channel (11). Austragvorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Fördermittel (4) druckabhängig, insbesondere in Abhängigkeit vom Druck in der Pumpenkammer (51) der zweiten Pumpe (6) gesteuert sind, wobei vorzugsweise das Ausgangsventil (50) als Überdruckventil ausgebildet und zur Öffnung spätestens bei Beginn der Medienförderung justiert ist.Discharge device according to claim 8, characterized in that the conveying means (4) are controlled as a function of pressure, in particular as a function of the pressure in the pump chamber (51) of the second pump (6), the outlet valve (50) preferably being designed as a pressure relief valve and opening at the latest is adjusted at the start of media funding. Austragvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß für ein die Austragvorrichtung (1) speisendes Speichergefäß eine Belüftung (52) vorgesehen ist, die vorzugsweise über ein hubabhängig schließendes Belüftungs-Ventil (53) an die Pumpenkammer (51) der Fördermittel (4) angeschlossen ist.Discharge device according to one of the preceding claims, characterized in that a ventilation (52) is provided for a storage vessel feeding the discharge device (1), which is preferably connected to the pump chamber (51) of the conveying means (4) via a ventilation valve (53) which closes in a stroke-dependent manner ) connected.
EP91118296A 1990-11-09 1991-10-26 Dispensing device for fluids Expired - Lifetime EP0484773B1 (en)

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DE4035688A DE4035688A1 (en) 1990-11-09 1990-11-09 Device for applying liquid medium - has internal pump provided with mechanism to control rate of flow by limiting stroke of pump
DE4035688 1990-11-09

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AT (1) ATE141190T1 (en)
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Also Published As

Publication number Publication date
ES2090206T3 (en) 1996-10-16
DE59108075D1 (en) 1996-09-19
US5443185A (en) 1995-08-22
DE4035688A1 (en) 1992-05-14
JPH0761485A (en) 1995-03-07
JP2981327B2 (en) 1999-11-22
EP0484773B1 (en) 1996-08-14
ATE141190T1 (en) 1996-08-15

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