EP0218840A2 - Fluid-dispensing device - Google Patents

Fluid-dispensing device Download PDF

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Publication number
EP0218840A2
EP0218840A2 EP86111115A EP86111115A EP0218840A2 EP 0218840 A2 EP0218840 A2 EP 0218840A2 EP 86111115 A EP86111115 A EP 86111115A EP 86111115 A EP86111115 A EP 86111115A EP 0218840 A2 EP0218840 A2 EP 0218840A2
Authority
EP
European Patent Office
Prior art keywords
pump
discharge device
housing
discharge
piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP86111115A
Other languages
German (de)
French (fr)
Other versions
EP0218840B1 (en
EP0218840A3 (en
Inventor
Lothar Graf
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 EP0218840A2 publication Critical patent/EP0218840A2/en
Publication of EP0218840A3 publication Critical patent/EP0218840A3/en
Application granted granted Critical
Publication of EP0218840B1 publication Critical patent/EP0218840B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B05B11/02—Membranes or pistons acting on the contents inside the container, e.g. follower pistons

Definitions

  • the invention relates to a discharge device for flowable media, in particular an atomizer, with a media store provided in a housing with a thrust piston pump, which has a pump piston which is displaceably guided on a piston track of a pump cylinder between an initial position and a pump stroke end position, and a pump piston which is formed by the pump cylinder Has discharge opening of the device via an outlet channel connected pump chamber in the form of a metering chamber determining the discharge volume per full pump stroke.
  • discharge devices of this type have a media storage which is spatially separate from the pump chamber, which is connected to the pump chamber via an inlet channel with an inlet valve which is generally switched on and which releases medium into the pump chamber on the return stroke of the pump piston.
  • the invention has for its object to provide a discharge device for flowable media, especially an atomizer, which is designed so that it is suitable for only a single use, that as little residual medium remains in it after use and that it with regard on the one-time use is particularly easy to set up and manufacture.
  • a discharge device of the type described in the introduction in that the entire media store of the device is formed by the pump chamber which is firmly closed opposite the pump piston and that the storage volume of this media store corresponds approximately to a single discharge volume.
  • the pump cylinder enclosing the pump chamber is therefore tightly closed except in the area in which the outlet channel is connected to it or in which the pump piston is to be used, so that it or the like as a very simple plastic structure. can be manufactured. Since the entire amount of medium stored in the discharge device is provided from the beginning in the pump chamber or in the pump cylinder, it can also be easily achieved in a simple manner that the entire stored quantity of media is discharged in the single pumping stroke.
  • the design according to the invention makes it possible to dispense with a cylinder housing with a separate cylinder cover, since the pump cylinder at its open end can be covered or closed directly by the main housing of the discharge device.
  • the pump cylinder can therefore be mounted as a freely accessible part directly on the housing, for example, which is open at the bottom and is otherwise essentially in one piece, so that it can be pushed further over the pump piston by hand from its starting position to carry out the pump stroke, and at the same time in the manner of an actuation -Push button acts. If this actuation button is in the initial position, i.e. before the dispenser is used once, completely within the housing, i.e.
  • the closed pump cylinder is only open towards the outlet channel, it does not return to its starting position after it has been actuated, but remains in the pump stroke end position, so that at the same time it forms a display device by means of which the condition of use of the discharge device can be clearly recognized.
  • an insight into the window section giving the pump cylinder can be provided in the casing of the housing, which window is expediently designed as a thumb engagement opening for actuating the discharge device.
  • the handle opposite the actuating push button for counter-holding the discharge device against the actuating pressure is to achieve a one-handed operation tion expediently formed by a finger shield, which has oppositely protruding finger contact surfaces on both sides adjacent to the central axis of the thrust piston pump, so that the index and middle fingers of the hand can be supported on them, the thumb of which rests on the push button.
  • the discharge device can be held very securely during operation and guided precisely, which is important, for example, when appropriate pharmaceuticals are discharged into a nostril. Due to the design described, the discharge device can be designed to be extremely small, for example having the largest dimensions of less than 5 cm.
  • the cavities of the discharge device which are filled or to be flowed through are expediently sealed airtight, these spaces being expediently completely filled with the medium up to the closure, that is to say without any air pockets.
  • the closure can be formed by an outlet valve which only opens at excess pressure in the pump chamber and is otherwise tightly closed, in particular a ball hose valve according to DE-OS 29 02 624, to which reference is given here for further details, in particular with regard to the simple and safely functioning structure is taken.
  • a closure which represents a predetermined breaking element or which is held in the closed position by at least one predetermined breaking element could, for example, be formed by a membrane.
  • a displacement body is expediently provided in the pump chamber, which in the pump stroke end position protrudes far, preferably at least approximately up to the closure, into the outlet channel and this except for flow slots or cannulas almost completely filled.
  • the discharge device 1 has a housing 2, the base body of which is essentially only open on one side in the manner of a cap and forms a standing surface 3 lying on one plane on this open end face.
  • the housing 2 is axially symmetrical to a central axis 4 or symmetrical to two mutually perpendicular axial planes, but in the direction of one of these axial planes it has a multiple extension than in the direction of the other axial plane.
  • the base body of the housing 2 which is essentially formed by the housing shell 5 and the end wall 6 opposite the open side, is elliptical in axial view, such that in this view its outer surfaces are convexly curved outwards with different radii of curvature.
  • discharge nozzle 7 From the end wall 6 of the housing 2 is a one-piece with this, standing in the central axis 4 discharge nozzle 7, which is circular in axial view and stands over its entire outer circumference against the outer surfaces of the jacket 5, i.e. compared to the smallest diagonal dimension of the Housing body has a smaller outer diameter.
  • the discharge nozzle 7 is tapered at an acute angle to its free end and has an inner sleeve which is exposed from its free end over its entire length and which projects as a sleeve extension 8 into the housing base body beyond the inner surface of the end wall 6.
  • the inner sleeve 9 lying in the central axis 4 has at its free end an annular stop cam 10 which projects beyond its inner circumference and which forms an annular inner shoulder 11 which is substantially perpendicular to the central axis 4.
  • a cylinder container 12 engages in the inner sleeve 9 from the end facing away from the end wall 6 and is designed as a simple, cylindrical and cup-shaped container that is only open at one end.
  • the cylinder container 12 forms the entire media reservoir 13 of the discharge device 1 and encloses a pump chamber 14 which is closed at its end opposite the open end of the cylinder container 12 by a wall lying essentially at right angles to the central axis 4.
  • This end face 15 is closed by an end wall 16 which is formed in one piece with the approximately cylindrical jacket 17 of the cylinder container 12.
  • the jacket 17 has a projecting flange 18, which protrudes over its outer circumference and is continuous and continuous, which at set cylinder container 17 engages behind the inner shoulder 11 of the inner sleeve 9 and abuts against it, so that the cylinder container 12 is axially precisely fixed in its starting position.
  • the inner circumference of the cylinder container 12 or the jacket 17 forms a piston raceway 19 for a pump piston 20, which has two piston lips 21, 22 converging at opposite acute angles and axially one behind the other for guidance on the piston raceway 19.
  • the pump piston 20 is designed as a hollow ring piston which is provided at the end of a hose section 24 of a piston tappet 23 which is formed in one piece with it, the other section of the piston tappet 23 being formed by the sleeve extension 8.
  • the end of the hose section 24 remote from the pump piston 20 is securely inserted and axially struck in an enlarged bore section of the associated free end of the sleeve extension 8.
  • the section 24 and the sleeve extension 8 form an outlet channel 25 which lies entirely within the piston rod in the central axis 4 and which connects the pump chamber 14 to a discharge opening 26 leading to the outside at the free end of the discharge nozzle 7 with the interposition of an outlet valve 27.
  • valve body 28 of this outlet valve 27, formed by a ball, is tightly enclosed by the associated, elastically expandable longitudinal section of the hose section 24, this longitudinal section in the region of a section of the bore of the sleeve which is slightly enlarged compared to its outer diameter set 8 lies, which abuts on both sides of the valve body 28 on the outer circumference of the hose section 24 and therefore supports this on both sides of the valve body 28.
  • a cup-shaped nozzle cap 31 with its jacket is inserted into an annular groove 30 lying in the central axis 4, which has an atomizer nozzle 32 forming the discharge opening 26 in its exposed front wall, which is slightly set back from the end face of the discharge nozzle 7.
  • annular groove 30 Through the annular groove 30, a freely projecting support mandrel 33 is formed, which bears over the major part against the inner surface of the jacket of the nozzle cap 31, but has connecting channels for the medium leading from the remaining outlet channel 25 to the atomizing nozzle 32.
  • a displacement body 34 which stands in the central axis 4 and protrudes in the direction toward the pump piston 20 in the form of a displacement mandrel, the outside diameter of which is only slightly smaller than the inside diameter of the hose section 24 and several over the circumference distributed longitudinal slots 35 extending over its entire length.
  • the end face of the displacement body 34 lies approximately in the plane of the end face of the pump piston 20 facing it.
  • the length of the displacement body 34 corresponds almost to the length of the maximum pump stroke.
  • the pump piston 20 or its rear piston lip 22 is close to the rear end of the piston race 19, which merges into the open end surface of the cylinder container 12 via a frustoconically shaped insertion end section.
  • the cylinder container 12 With its end associated with the end wall 16, the cylinder container 12 forms a handle 36 in the manner of a pusher button, for which purpose a thumb socket 37 is provided in the outside of the end wall 16 for securely supporting the thumb tip of one hand.
  • the outside of the end wall 6 of the housing 2 forms on both sides of the discharge nozzle 7 on the long elliptical legs, a handle 38 for supporting two further fingers of the same hand, so that the handles 36, 38 have a handle for holding and actuating the discharge device 1 at the same time single hand form.
  • grip profiles in the form of, for example, parallel projecting ribs 39 are provided on the outside of the end wall 6.
  • a cutout 40 is provided symmetrically to the associated axial plane of symmetry of the housing 2, which extends with parallel side boundaries to the base 3, but the concave, arched transverse boundary thereof at a distance from the end face 6 lies, namely at most approximately up to the level of the free end face of the inner sleeve 9.
  • the width of the cutout 40 provided for the engagement with the thumb is chosen so large that the engaging thumb is guided at both side boundaries at the same time that the housing 2 can thus be put onto the thumb practically self-retaining.
  • the cylinder container 12 is pushed onto the pump piston 20 with the thumb of its associated end surface on the inner surface of the end wall 6 of the housing 2, the medium being discharged through the discharge opening 26 by opening the outlet valve 27.
  • the discharge nozzle 7 is with a closure cap 41 which completely surrounds it, which is secured by a spring catch relative to the discharge nozzle 7 and rests with its open end surface on the outer surface of the end wall 6. Before the discharge device 1 is used, this closure cap 41, which is not shown in FIGS. 1 and 3, is pulled off.
  • the support mandrel 33a is formed by a separate component 42, which has an enlarged collar 43 flattened on one side adjacent to the nozzle cap 31a.
  • This collar 43 which is widened at an acute angle to the discharge opening 26a, engages in an opening 44 in the discharge nozzle 7a which is adapted to it and which is enlarged compared to the outer diameter of the annular groove 30a and which forms a section of the outlet channel 25a.
  • the component 42 can be sprinkled from the free end into the opening 44 with the elastic widening of the discharge nozzle 7a in such a way that it is then axially secured without play and held in a centered manner.
  • the component 42 has, following the collar 43, a guide mandrel 45, the diameter of which is substantially smaller than the inner diameter of the associated section of the outlet channel 25a and which is surrounded by a valve spring 46 of the outlet valve 27a.
  • This outlet valve 27a has a valve body 28a formed by a ball and axially movable against the spring force of the valve spring 46 in the open position, to which an inner shoulder in the sleeve extension 8a is assigned as valve seat 47.
  • the exhaust valve is not as in the embodiment 1 to 3 a component of the piston unit, but a component of the housing 2a and the discharge nozzle 7a.
  • the cylinder container 12 is initially completely filled with the medium to be discharged, after which the pump piston 20, pre-assembled with the housing 2 and the outlet valve 27, is inserted into the open end of the cylinder container 12.
  • the cylinder container 12 is pushed so far over the pump piston 20 until the outlet valve 27 opens and the enclosed air is thereby let out.
  • the recess flange 18 slides with a frustoconical widening surface provided on its outer circumference on a corresponding frustoconical counter surface provided on the inner circumference of the stop cam 18, so that the inner sleeve 9 is widened until the recess flange 18 jumps behind the inner shoulder 11.

Abstract

A fluid-dispensing device is constructed as a single-action atomiser (1) whose entire fluid store (13) is formed by the pump chamber (14) of a pusher piston pump. The free-lying cylinder container (12) constructed as a trigger knob-like handle is therefore valve-free and can be opened exclusively towards the outlet channel (25). …<IMAGE>…

Description

Die Erfindung betrifft eine Austragvorrichtung für fließfähige Medien, insbesondere einen Zerstäuber, mit einem in einem Gehäuse vorgesehenen Medienspeicher mit Schubkolbenpumpe, die einen an einer Kolbenlaufbahn eines Pumpenzylinders zwischen einer Ausgangslage und einer Pumphub-Endlage verschiebbar geführten Pumpkolben sowie eine durch den Pumpenzylinder gebildete, mit einer Austragöffnung der Vorrichtung über einen Auslaßkanal verbundene Pumpenkammer in Form einer das Austragvolumen je vollem Pumphub bestimmenden Dosierkammer aufweist.The invention relates to a discharge device for flowable media, in particular an atomizer, with a media store provided in a housing with a thrust piston pump, which has a pump piston which is displaceably guided on a piston track of a pump cylinder between an initial position and a pump stroke end position, and a pump piston which is formed by the pump cylinder Has discharge opening of the device via an outlet channel connected pump chamber in the form of a metering chamber determining the discharge volume per full pump stroke.

Bekannte Austragvorrichtungen dieser Art weisen einen räumlich von der Pumpenkammer getrennten Medienspeicher auf, der über einen Einlaßkanal mit in der Regel einge­schaltetem Einlaßventil an die Pumpenkammer angeschlos­sen ist und beim Rückhub des Pumpkolbens Medium in die Pumpenkammer abgibt. Dies macht solche Austragvorrich­tungen ungeeignet für diejenigen Anwendungsfälle, in welchen, ähnlich wie im Falle einer medizinischen Ein­mal-Spritze, nur eine einzige Charge eines beispiels­weise pharmazeutischen Mediums ausgebracht und danach die Austragvorrichtung, beispielsweise aus hygienischen, therapeutischen oder sicherheitstechnischen Gründen nicht mehr verwendet, sondern weggeworfen werden soll.Known discharge devices of this type have a media storage which is spatially separate from the pump chamber, which is connected to the pump chamber via an inlet channel with an inlet valve which is generally switched on and which releases medium into the pump chamber on the return stroke of the pump piston. This makes such discharge devices unsuitable for those applications in which, like in the case of a disposable medical syringe, is used to dispense only a single batch of a pharmaceutical medium, for example, and then the discharge device is no longer used, for example for hygienic, therapeutic or safety reasons, but is to be discarded.

Der Erfindung liegt die Aufgabe zugrunde, eine Austrag­vorrichtung für fließfähige Medien, insbesondere einen Zerstäuber zu schaffen, die so ausgelegt ist, daß sie für nur einen einzigen einmaligen Gebrauch geeignet ist, daß nach dem Gebrauch möglichst wenig Restmedium in ihr verbleibt und daß sie im Hinblick auf den nur einmaligen Gebrauch besonders einfach im Aufbau sowie herzustellen ist.The invention has for its object to provide a discharge device for flowable media, especially an atomizer, which is designed so that it is suitable for only a single use, that as little residual medium remains in it after use and that it with regard on the one-time use is particularly easy to set up and manufacture.

Diese Aufgabe wird bei einer Austragvorrichtung der ein­gangs beschriebenen Art erfindungsgemäß dadurch gelöst, daß der gesamte Medienspeicher der Vorrichtung durch die dem Pumpkolben gegenüberliegend fest verschlossene Pum­penkammer gebildet ist und daß das Speichervolumen die­ses Medienspeichers etwa einem einzigen Austragvolumen entspricht. Der die Pumpenkammer umschließende Pumpenzy­linder ist also außer in dem Bereich, in welchem der Auslaßkanal an ihn angeschlossen ist bzw. in dem der Pumpkolben einzusetzen ist, dicht geschlossen, so daß er als sehr einfacher Baukörper aus Kunststoff o.dgl. her­gestellt werden kann. Da die gesamte, in der Austragvor­richtung gespeicherte Menge an Medium von Anfang an in der Pumpenkammer bzw. im Pumpenzylinder vorgesehen ist, kann auch auf einfache Weise sicher erreicht werden, daß bei dem einzigen Pumphub die gesamte gespeicherte Me­dienmenge ausgetragen wird.This object is achieved according to the invention in a discharge device of the type described in the introduction in that the entire media store of the device is formed by the pump chamber which is firmly closed opposite the pump piston and that the storage volume of this media store corresponds approximately to a single discharge volume. The pump cylinder enclosing the pump chamber is therefore tightly closed except in the area in which the outlet channel is connected to it or in which the pump piston is to be used, so that it or the like as a very simple plastic structure. can be manufactured. Since the entire amount of medium stored in the discharge device is provided from the beginning in the pump chamber or in the pump cylinder, it can also be easily achieved in a simple manner that the entire stored quantity of media is discharged in the single pumping stroke.

Durch die erfindungsgemäße Ausbildung ist es möglich, auf ein Zylindergehäuse mit gesondertem Zylinderdeckel zu verzichten, da der Pumpenzylinder an seinem offenen Ende unmittelbar durch das Hauptgehäuse der Austragvor­richtung abgedeckt bzw. verschlossen sein kann. Der Pum­penzylinder kann daher als frei zugänglich liegender Teil unmittelbar so am beispielsweise bodenseitig offe­nen und ansonsten im wesentlichen einteilig ausgebilde­ten Gehäuse gelagert sein, daß er zur Durchführung des Pumphubes von Hand aus seiner Ausgangslage weiter über den Pumpkolben geschoben werden kann und hierbei gleich­zeitig nach Art eines Betätigungs-Druckknopfes wirkt. Liegt dieser Betätigungs-Druckknopf in Ausgangslage, also vor der einmaligen Benutzung der Austragvorrich­tung, vollständig innerhalb des Gehäuses, d.h. zweckmä­ßig gegenüber der offenen Seite des Gehäuses wenigstens geringfügig zurückversetzt, so ist er einerseits für die Betätigung gut zugänglich und andererseits vor verse­hentlicher Betätigung oder anderen mechanischen Be­lastungen geschützt. Da der geschlossene Pumpenzylinder nur zum Auslaßkanal hin offen ist, kehrt er nach seiner Betätigung auch nicht in seine Ausgangslage zurück, son­dern verbleibt in der Pumphub-Endstellung, so daß er gleichzeitig eine Anzeigevorrichtung bildet, anhand wel­cher der Benutzungszustand der Austragvorrichtung ein­deutig erkannt werden kann. Zum leichteren Erkennen kann im Mantel des Gehäuses ein Einblick auf den Pumpenzy­linder gebender Fensterausschnitt vorgesehen sein, der zweckmäßig gleichzeitig als Daumen-Eingriffsöffnung für die Betätigung der Austragvorrichtung ausgebildet ist.The design according to the invention makes it possible to dispense with a cylinder housing with a separate cylinder cover, since the pump cylinder at its open end can be covered or closed directly by the main housing of the discharge device. The pump cylinder can therefore be mounted as a freely accessible part directly on the housing, for example, which is open at the bottom and is otherwise essentially in one piece, so that it can be pushed further over the pump piston by hand from its starting position to carry out the pump stroke, and at the same time in the manner of an actuation -Push button acts. If this actuation button is in the initial position, i.e. before the dispenser is used once, completely within the housing, i.e. Expediently at least slightly set back from the open side of the housing, on the one hand it is easily accessible for actuation and on the other hand it is protected against accidental actuation or other mechanical loads. Since the closed pump cylinder is only open towards the outlet channel, it does not return to its starting position after it has been actuated, but remains in the pump stroke end position, so that at the same time it forms a display device by means of which the condition of use of the discharge device can be clearly recognized. For easier identification, an insight into the window section giving the pump cylinder can be provided in the casing of the housing, which window is expediently designed as a thumb engagement opening for actuating the discharge device.

Die dem Betätigungs-Druckknopf gegenüberliegende Hand­habe zur Gegenhalterung der Austragvorrichtung gegen den Betätigungsdruck ist zur Erzielung einer Einhand-Bedie­ nung zweckmäßig durch ein Fingerschild gebildet, welches entgegengesetzt ausragende Fingeranlageflächen beider­seits benachbart zur Mittelachse der Schubkolbenpumpe aufweist, so daß an ihnen der Zeige- und der Mittelfin­ger der Hand abgestützt werden können, deren Daumen am Druckknopf anliegt. Dadurch kann die Austragvorrichtung bei der Betätigung sehr sicher gehalten und genau ge­führt werden, was beispielsweise beim Austragen von ent­sprechenden Pharmazeutika in eine Nasenöffnung wichtig ist. Durch die beschriebene Ausbildung kann die Austrag­vorrichtung extrem klein gestaltet werden, beispiels­weise größte Ausdehnungen von weniger als 5 cm haben.The handle opposite the actuating push button for counter-holding the discharge device against the actuating pressure is to achieve a one-handed operation tion expediently formed by a finger shield, which has oppositely protruding finger contact surfaces on both sides adjacent to the central axis of the thrust piston pump, so that the index and middle fingers of the hand can be supported on them, the thumb of which rests on the push button. As a result, the discharge device can be held very securely during operation and guided precisely, which is important, for example, when appropriate pharmaceuticals are discharged into a nostril. Due to the design described, the discharge device can be designed to be extremely small, for example having the largest dimensions of less than 5 cm.

Bei einer besonders vorteilhaften Weiterbildung des Er­findungsgegenstandes sind die vom Medium gefüllten bzw. zu durchströmenden Hohlräume der Austragvorrichtung zweckmäßig luftdicht nach außen verschlossen, wobei die­se Räume zweckmäßig bis zu dem Verschluß vollständig vom Medium, also ohne jegliche Lufteinschlüsse gefüllt sind. Der Verschluß kann durch ein nur bei Überdruck in der Pumpenkammer öffnendes und ansonsten dichtschließendes Auslaß-Ventil, insbesondere ein Kugelschlauchventil ge­mäß der DE-OS 29 02 624 gebildet sein, auf die hier we­gen weiterer Einzelheiten, insbesondere hinsichtlich des einfachen und sicher funktionierenden Aufbaues, Bezug genommen wird. Es ist aber auch denkbar, den Auslaßkanal bzw. die Austragöffnung durch einen nach dem Öffnen nicht mehr schließenden Verschluß luftdicht zu ver­schließen, der zweckmäßig so ausgebildet ist, daß er bei Erreichen eines bestimmten Überdruckes auf seiner der Pumpenkammer zugehörigen Seite, beispielsweise unter Zerstörung bzw. Rißbildung, öffnet; ein solcher, ein Sollbruchglied darstellender bzw. über mindestens ein Sollbruchglied in Schließlage gehaltener Verschluß könnte beispielsweise durch eine Membran gebildet sein.In a particularly advantageous development of the subject matter of the invention, the cavities of the discharge device which are filled or to be flowed through are expediently sealed airtight, these spaces being expediently completely filled with the medium up to the closure, that is to say without any air pockets. The closure can be formed by an outlet valve which only opens at excess pressure in the pump chamber and is otherwise tightly closed, in particular a ball hose valve according to DE-OS 29 02 624, to which reference is given here for further details, in particular with regard to the simple and safely functioning structure is taken. However, it is also conceivable to close the outlet channel or the discharge opening in an airtight manner by a closure which no longer closes after opening and which is expediently designed such that when a certain overpressure is reached on its side associated with the pump chamber, for example with destruction or Cracking, opens; such a A closure which represents a predetermined breaking element or which is held in the closed position by at least one predetermined breaking element could, for example, be formed by a membrane.

Damit beim einmaligen Pumphub nach Möglichkeit weitest­gehend die gesamte gespeicherte Menge an Medium ausge­tragen wird, ist zweckmäßig in der Pumpenkammer ein Ver­drängungskörper vorgesehen, der in Pumphub-Endstellung weit, vorzugsweise wenigstens annähernd bis an den Ver­schluß, in den Auslaßkanal ragt und diesen dabei bis auf Strömungsschlitze bzw. -kanülen nahezu vollständig aus­füllt.So that the entire stored quantity of medium is discharged as far as possible during the one-time pump stroke, a displacement body is expediently provided in the pump chamber, which in the pump stroke end position protrudes far, preferably at least approximately up to the closure, into the outlet channel and this except for flow slots or cannulas almost completely filled.

Diese und weitere Merkmale von bevorzugten Weiterbildun­gen der Erfindung gehen 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 können. Ausführungsbeispiele der Erfindung sind in den Zeichnun­gen dargestellt und werden im folgenden näher erläutert. In den Zeichnungen zeigen:

  • Fig. 1 eine erfindungsgemäße Austragvorrichtung in Ansicht und natürlicher Größe;
  • Fig. 2 die Austragvorrichtung gemäß Fig. 1 im Axialschnitt und in vergrößerter Darstel­lung;
  • Fig. 3 eine Draufsicht auf die Austragvorrichtung gemäß Fig. 1, jedoch bei abgenommener Schutzkappe;
  • Fig. 4 eine weitere Ausführungsform in einer aus­schnittsweisen Darstellung entsprechend Fig. 2.
These and further features of preferred developments of the invention are also apparent from the description and the drawings, the individual features being able to be implemented individually or in groups in the form of sub-combinations in one embodiment of the invention and in other fields. Embodiments of the invention are shown in the drawings and are explained in more detail below. The drawings show:
  • 1 shows a discharge device according to the invention in view and natural size;
  • FIG. 2 shows the discharge device according to FIG. 1 in axial section and in an enlarged representation;
  • 3 shows a plan view of the discharge device according to FIG. 1, but with the protective cap removed;
  • 4 shows a further embodiment in a partial representation corresponding to FIG. 2.

Die Austragvorrichtung 1 gemäß den Fig. 1 bis 3 weist ein Gehäuse 2 auf, dessen Grundkörper nach Art einer Kappe im wesentlichen nur an einer einzigen Seite offen ist und an dieser offenen Stirnseite eine in einer Ebene liegende Standfläche 3 bildet. Das Gehäuse 2 ist achs­symmetrisch zu einer Mittelachse 4 bzw. symmetrisch zu zwei zueinander rechtwinkligen Axialebenen ausgebildet, hat jedoch in Richtung der einen dieser Axialebenen eine mehrfach größere Erstreckung als in Richtung der anderen Axialebene. Beim dargestellten Ausführungsbeispiel ist der Grundkörper des Gehäuses 2, welcher im wesentlichen durch den Gehäusemantel 5 und die der offenen Seite ge­genüberliegende Stirnwand 6 gebildet ist, in Axialan­sicht elliptisch, derart, daß in dieser Ansicht seine Außenflächen mit unterschiedlichen Krümmungsradien nach außen konvex gekrümmt sind.The discharge device 1 according to FIGS. 1 to 3 has a housing 2, the base body of which is essentially only open on one side in the manner of a cap and forms a standing surface 3 lying on one plane on this open end face. The housing 2 is axially symmetrical to a central axis 4 or symmetrical to two mutually perpendicular axial planes, but in the direction of one of these axial planes it has a multiple extension than in the direction of the other axial plane. In the illustrated embodiment, the base body of the housing 2, which is essentially formed by the housing shell 5 and the end wall 6 opposite the open side, is elliptical in axial view, such that in this view its outer surfaces are convexly curved outwards with different radii of curvature.

Von der Stirnwand 6 des Gehäuses 2 steht ein einteilig mit dieser ausgebildeter, in der Mittelachse 4 stehender Austragstutzen 7 vor, der in Axialansicht kreisförmig begrenzt ist und über seinen gesamten Außenumfang gegen­über den Außenflächen des Mantels 5 zurücksteht, also gegenüber dem kleinsten Diagonal-Maß des Gehäuse-Grund­körpers einen kleineren Außendurchmesser hat. Der Aus­tragstutzen 7 ist zu seinem freien Ende spitzwinklig konisch verjüngt und weist eine von seinem freien Ende über ihre ganze Länge freiliegend abstehende Innenhülse auf, die als Hülsenansatz 8 in den Gehäuse-Grundkörper bis über die Innenfläche der Stirnwand 6 vorsteht.From the end wall 6 of the housing 2 is a one-piece with this, standing in the central axis 4 discharge nozzle 7, which is circular in axial view and stands over its entire outer circumference against the outer surfaces of the jacket 5, i.e. compared to the smallest diagonal dimension of the Housing body has a smaller outer diameter. The discharge nozzle 7 is tapered at an acute angle to its free end and has an inner sleeve which is exposed from its free end over its entire length and which projects as a sleeve extension 8 into the housing base body beyond the inner surface of the end wall 6.

Über die Innenseite der Stirnwand 6 steht eine einteilig mit dieser ausgebildete, im wesentlichen zylindrische Innenhülse 9 nur über einen Teil der Höhe bzw. Länge des Gehäuse-Grundkörpers vor, deren Außendurchmesser annä­hernd gleich dem kleinsten äußeren Diagonalmaß des Ge­häuse-Grundkörpers sein kann, die also mit ihrem Außen­umfang im Bereich zweier einander diametral gegenüber­liegender Zonen in den Gehäusemantel 5 übergeht bzw. durch diesen gebildet ist. Es ist auch denkbar, die In­nenhülse 9 durch zwei annähernd halbzylindrische Schalen zu bilden, deren in einer Axialebene der Mittelachse 4 liegende Teilungsebene in der Zone geringstens Diagonal­masses des Gehäuse-Grundkörpers liegt und die ggf. ge­genüber der Innenfläche des Gehäusemantels 5 berührungs­frei in das Gehäuseinnere vorstehen. Die in der Mittel­achse 4 liegende Innenhülse 9 weist an ihrem freien Ende einen über ihren Innenumfang vorstehenden, ringförmigen Anschlagnocken 10 auf, der eine zur Mittelachse 4 im wesentlichen rechtwinklige ringförmige Innenschulter 11 bildet. In die Innenhülse 9 greift von dem der Stirn­wand 6 abgekehrten Ende ein Zylinderbehälter 12 ein, der als einfacher, zylindrischer und napfförmig nur an einem Ende offener Behälter ausgebildet ist. Der Zylinderbe­hälter 12 bildet den gesamten Medienspeicher 13 der Aus­tragvorrichtung 1 und umschließt eine Pumpenkammer 14, die an ihrem dem offenen Ende des Zylinderbehälters 12 gegenüberliegenden Ende durch eine im wesentlichen rechtwinklig zur Mittelachse 4 liegende Wand verschlos­sen ist. Diese Stirnseite 15 ist durch eine Stirnwand 16 verschlossen, welche einteilig mit dem annähernd zylind­rischen Mantel 17 des Zylinderbehälters 12 ausgebildet ist. Am offenen Ende weist der Mantel 17 einen über sei­nen Außenumfang vorstehenden, ringförmig ununterbrochen durchgehenden Einsprengflansch 18 auf, welcher bei einge­ setztem Zylinderbehälter 17 die Innenschulter 11 der Innenhülse 9 hintergreift und an dieser anliegt, so daß der Zylinderbehälter 12 in seiner Ausgangslage axial genau festgelegt ist.On the inside of the end wall 6, a substantially cylindrical inner sleeve 9 formed in one piece with this protrudes only over part of the height or length of the housing base body, the outer diameter of which can be approximately equal to the smallest outer diagonal dimension of the housing base body, that is with its outer circumference in the area of two diametrically opposite zones merges into the housing shell 5 or is formed by the latter. It is also conceivable to form the inner sleeve 9 by means of two approximately semi-cylindrical shells, the division plane of which lies in an axial plane of the central axis 4 in the zone of at least diagonal dimension of the housing base body and which protrude without contact into the interior of the housing relative to the inner surface of the housing shell 5 . The inner sleeve 9 lying in the central axis 4 has at its free end an annular stop cam 10 which projects beyond its inner circumference and which forms an annular inner shoulder 11 which is substantially perpendicular to the central axis 4. A cylinder container 12 engages in the inner sleeve 9 from the end facing away from the end wall 6 and is designed as a simple, cylindrical and cup-shaped container that is only open at one end. The cylinder container 12 forms the entire media reservoir 13 of the discharge device 1 and encloses a pump chamber 14 which is closed at its end opposite the open end of the cylinder container 12 by a wall lying essentially at right angles to the central axis 4. This end face 15 is closed by an end wall 16 which is formed in one piece with the approximately cylindrical jacket 17 of the cylinder container 12. At the open end, the jacket 17 has a projecting flange 18, which protrudes over its outer circumference and is continuous and continuous, which at set cylinder container 17 engages behind the inner shoulder 11 of the inner sleeve 9 and abuts against it, so that the cylinder container 12 is axially precisely fixed in its starting position.

Der Innenumfang des Zylinderbehälters 12 bzw. des Man­tels 17 bildet eine Kolbenlaufbahn 19 für einen Pumpkol­ben 20, der zwei entgegengesetzt spitzwinklig konvergie­rende und axial hintereinander liegende Kolbenlippen 21, 22 zur Führung an der Kolbenlaufbahn 19 aufweist. Der Pumpkolben 20 ist als hohler Ringkolben ausgebildet, der am Ende eines einteilig mit ihm ausgebildeten Schlauch-­Abschnittes 24 eines Kolbenstößels 23 vorgesehen ist, wobei der andere Abschnitt des Kolbenstößels 23 durch den Hülsenansatz 8 gebildet ist. Das vom Pumpkolben 20 abgekehrte Ende des Schlauch-Abschnittes 24 ist in einen erweiterten Bohrungsabschnitt des zugehörigen freien Endes des Hülsenansatzes 8 sicher haltend und axial an­geschlagen eingesteckt. Der Abschnitt 24 und der Hülsen­ansatz 8 bilden einen vollständig innerhalb des Kolben­stößels in der Mittelachse 4 liegenden Auslaßkanal 25, der die Pumpenkammer 14 mit einer ins Freie führenden Austragöffnung 26 am freien Ende des Austragstutzens 7 unter Zwischenschaltung eines Auslaßventiles 27 verbin­det. Das Auslaßventil 27, das in dem in den Hülsenan­satz 8 eingreifenden Bereich des Schlauch-Abschnittes 24 und etwa im selben Axialbereich wie die Stirnwand 6 vor­gesehen ist, ist als Kugel-Schlauchventil ausgebildet. Der durch eine Kugel gebildete Ventilkörper 28 dieses Auslaßventiles 27 wird von dem zugehörigen, elastisch aufweitbaren Längsabschnitt des Schlauchabschnittes 24 dicht umschlossen, wobei dieser Längsabschnitt im Be­reich eines gegenüber seinem Außendurchmesser geringfü­gig erweiterten Abschnittes der Bohrung des Hülsenan­ satzes 8 liegt, der beiderseits des Ventilkörpers 28 am Außenumfang des Schlauch-Abschnittes 24 anliegt und die­sen daher beiderseits des Ventilkörpers 28 abstützt.The inner circumference of the cylinder container 12 or the jacket 17 forms a piston raceway 19 for a pump piston 20, which has two piston lips 21, 22 converging at opposite acute angles and axially one behind the other for guidance on the piston raceway 19. The pump piston 20 is designed as a hollow ring piston which is provided at the end of a hose section 24 of a piston tappet 23 which is formed in one piece with it, the other section of the piston tappet 23 being formed by the sleeve extension 8. The end of the hose section 24 remote from the pump piston 20 is securely inserted and axially struck in an enlarged bore section of the associated free end of the sleeve extension 8. The section 24 and the sleeve extension 8 form an outlet channel 25 which lies entirely within the piston rod in the central axis 4 and which connects the pump chamber 14 to a discharge opening 26 leading to the outside at the free end of the discharge nozzle 7 with the interposition of an outlet valve 27. The outlet valve 27, which is provided in the area of the hose section 24 engaging in the sleeve extension 8 and approximately in the same axial area as the end wall 6, is designed as a ball-hose valve. The valve body 28 of this outlet valve 27, formed by a ball, is tightly enclosed by the associated, elastically expandable longitudinal section of the hose section 24, this longitudinal section in the region of a section of the bore of the sleeve which is slightly enlarged compared to its outer diameter set 8 lies, which abuts on both sides of the valve body 28 on the outer circumference of the hose section 24 and therefore supports this on both sides of the valve body 28.

Im freien Ende des Austragstutzens 7 ist in eine in der Mittelachse 4 liegende Ringnut 30 eine napfförmige Dü­senkappe 31 mit ihrem Mantel eingesetzt, die in ihrer frei liegenden, gegenüber der Endfläche des Austrag­stutzens 7 geringfügig zurückversetzten Stirnwand eine die Austragöffnung 26 bildende Zerstäuberdüse 32 auf­weist. Durch die Ringnut 30 ist ein frei vorstehender Stützdorn 33 gebildet, der über den größten Teil an der Innenfläche des Mantels der Düsenkappe 31 anliegt, je­doch vom übrigen Auslaßkanal 25 bis zur Zerstäuberdüse 32 führende Verbindungskanäle für das Medium aufweist.In the free end of the discharge nozzle 7, a cup-shaped nozzle cap 31 with its jacket is inserted into an annular groove 30 lying in the central axis 4, which has an atomizer nozzle 32 forming the discharge opening 26 in its exposed front wall, which is slightly set back from the end face of the discharge nozzle 7. Through the annular groove 30, a freely projecting support mandrel 33 is formed, which bears over the major part against the inner surface of the jacket of the nozzle cap 31, but has connecting channels for the medium leading from the remaining outlet channel 25 to the atomizing nozzle 32.

An der Innenseite der Stirnwand 16 des Zylinderbehälters 12 ist ein in der Mittelachse 4 stehender, in Richtung gegen den Pumpkolben 20 vorstehender Verdrängungskörper 34 in Form eines Verdrängungsdornes vorgesehen, dessen Außendurchmesser nur geringfügig kleiner als der Innen­durchmesser des Schlauchabschnittes 24 ist und der meh­rere über den Umfang verteilte, über seine gesamte Länge reichende Längsschlitze 35 aufweist. In Ausgangslage liegt die Endfläche des Verdrängungskörpers 34 annähernd in der Ebene der ihm zugekehrten endseitigen Stirnfläche des Pumpkolbens 20. Die Länge des Verdrängungskörpers 34 entspricht nahezu der Länge des maximalen Pumphubes. In Ausgangslage steht der Pumpkolben 20 bzw. dessen hintere Kolbenlippe 22 nahe beim hinteren Ende der Kolbenlauf­bahn 19, die über einem kegelstumpfförmig erweiterten Einführ-Endabschnitt in die offene Endfläche des Zylin­derbehälters 12 übergeht.Provided on the inside of the end wall 16 of the cylinder container 12 is a displacement body 34, which stands in the central axis 4 and protrudes in the direction toward the pump piston 20 in the form of a displacement mandrel, the outside diameter of which is only slightly smaller than the inside diameter of the hose section 24 and several over the circumference distributed longitudinal slots 35 extending over its entire length. In the starting position, the end face of the displacement body 34 lies approximately in the plane of the end face of the pump piston 20 facing it. The length of the displacement body 34 corresponds almost to the length of the maximum pump stroke. In the starting position, the pump piston 20 or its rear piston lip 22 is close to the rear end of the piston race 19, which merges into the open end surface of the cylinder container 12 via a frustoconically shaped insertion end section.

Mit seinem der Stirnwand 16 zugehörigen Ende bildet der Zylinderbehälter 12 nach Art eines Drückerknopfes eine Handhabe 36, zu welchem Zweck in der Außenseite der Stirnwand 16 eine kugelkalottenförmig vertiefte Daumen­kuhle 37 zur sicheren Abstützung der Daumenkuppe einer Hand vorgesehen ist. Die Außenseite der Stirnwand 6 des Gehäuses 2 bildet beiderseits des Austragstutzens 7 an den langen Ellipsenschenkeln jeweils eine Handhabe 38 zur Abstützung jeweils zweier weiterer Finger derselben Hand, so daß also die Handhaben 36, 38 einen Griff zum gleichzeitigen Halten und Betätigen der Austragvorrich­tung 1 mit einer einzigen Hand bilden. An der Außenseite der Stirnwand 6 sind zur besseren Abstützung der Finger Griffigkeits-Profilierungen in Form beispielsweise von parallelen vorstehenden Rippen 39 vorgesehen. Im Man­tel 5 des Gehäuses 2 und zwar auf einer von dessen bei­den breiteren Seiten ist symmetrisch zur zugehörigen axialen Symmetrieebene des Gehäuses 2 ein Ausschnitt 40 vorgesehen, der mit parallelen Seitenbegrenzungen bis an die Standfläche 3 reicht, dessen konkav bogenförmige Querbegrenzung jedoch im Abstand von der Stirnfläche 6 liegt, nämlich höchstens etwa bis in Höhe der freien Endfläche der Innenhülse 9 reicht. Die Breite des für den Eingriff mit dem Daumen vorgesehenen Ausschnittes 40 ist so groß gewählt, daß der eingreifende Daumen gleich­zeitig an beiden Seitenbegrenzungen geführt ist, daß das Gehäuse 2 also praktisch selbsthaltend auf den Daumen aufgesteckt werden kann. Zum Gebrauch der Austragvor­richtung 1 wird mit dem Daumen der Zylinderbehälter 12 bis zum Anschlag seiner zugehörigen Endfläche an der Innenfläche der Stirnwand 6 des Gehäuses 2 auf den Pump­kolben 20 aufgeschoben, wobei das Medium unter Öffnung des Auslaßventiles 27 durch die Austragöffnung 26 zer­stäubt ausgetragen wird. Der Austragstutzen 7 ist mit einer ihn vollständig umschließenden Verschlußkappe 41 abgedeckt, die über eine Federrastung gegenüber dem Aus­tragstutzen 7 gesichert ist und mit ihrer offenen End­fläche an der Außenfläche der Stirnwand 6 anliegt. Vor dem Gebrauch der Austragvorrichtung 1 wird diese Ver­schlußkappe 41, die in den Fig. 1 und 3 nicht darge­stellt ist, abgezogen.With its end associated with the end wall 16, the cylinder container 12 forms a handle 36 in the manner of a pusher button, for which purpose a thumb socket 37 is provided in the outside of the end wall 16 for securely supporting the thumb tip of one hand. The outside of the end wall 6 of the housing 2 forms on both sides of the discharge nozzle 7 on the long elliptical legs, a handle 38 for supporting two further fingers of the same hand, so that the handles 36, 38 have a handle for holding and actuating the discharge device 1 at the same time single hand form. For better support of the fingers, grip profiles in the form of, for example, parallel projecting ribs 39 are provided on the outside of the end wall 6. In the jacket 5 of the housing 2, namely on one of its two wider sides, a cutout 40 is provided symmetrically to the associated axial plane of symmetry of the housing 2, which extends with parallel side boundaries to the base 3, but the concave, arched transverse boundary thereof at a distance from the end face 6 lies, namely at most approximately up to the level of the free end face of the inner sleeve 9. The width of the cutout 40 provided for the engagement with the thumb is chosen so large that the engaging thumb is guided at both side boundaries at the same time that the housing 2 can thus be put onto the thumb practically self-retaining. To use the discharge device 1, the cylinder container 12 is pushed onto the pump piston 20 with the thumb of its associated end surface on the inner surface of the end wall 6 of the housing 2, the medium being discharged through the discharge opening 26 by opening the outlet valve 27. The discharge nozzle 7 is with a closure cap 41 which completely surrounds it, which is secured by a spring catch relative to the discharge nozzle 7 and rests with its open end surface on the outer surface of the end wall 6. Before the discharge device 1 is used, this closure cap 41, which is not shown in FIGS. 1 and 3, is pulled off.

In Fig. 4 sind für einander entsprechende Teile die gleichen Bezugszeichen wie in Fig. 2, jedoch mit dem Index "a" verwendet. Bei der Ausführungsform nach Fig. 4 ist der Stützdorn 33a durch einen gesonderten Bauteil 42 gebildet, der benachbart zur Düsenkappe 31a einen erwei­terten, an einer Seite abgeflachten Bund 43 aufweist. Dieser, zur Austragöffnung 26a spitzwinklig konisch er­weiterte Bund 43 greift in eine an ihn angepaßte, gegen­über dem Außendurchmesser der Ringnut 30a erweiterte Öffnung 44 im Austragstutzen 7a ein, die einen Abschnitt des Auslaßkanals 25a bildet. Der Bauteil 42 kann unter elastischer Aufweitung des Austragstutzens 7a von dessen freiem Ende her in die Öffnung 44 derart eingesprengt werden, daß er dann spielfrei axial gesichert und zen­triert festgehalten ist. An seinem vom Stützdorn 33a abgekehrten Ende weist der Bauteil 42 im Anschluß an den Bund 43 einen Führungsdorn 45 auf, dessen Durchmesser wesentlich kleiner als der Innendurchmesser des zugehö­rigen Abschnittes des Auslaßkanales 25a ist und der von einer Ventilfeder 46 des Auslaßventiles 27a umgeben ist. Dieses Auslaßventil 27a weist einen durch eine Kugel gebildeten, axial gegen die Federkraft der Ventilfeder 46 in Öffnungsstellung bewegbaren Ventilkörper 28a auf, dem als Ventilsitz 47 eine Innenschulter im Hülsenansatz 8a zugeordnet ist. Bei diesem Ausführungsbeispiel ist also das Auslaßventil nicht wie bei der Ausführungsform nach den Fig. 1 bis 3 ein Bestandteil der Kolbeneinheit, sondern ein Bestandteil des Gehäuses 2a bzw. des Aus­tragstutzens 7a.In Fig. 4, the same reference numerals as in Fig. 2 are used for corresponding parts, but with the index "a". In the embodiment according to FIG. 4, the support mandrel 33a is formed by a separate component 42, which has an enlarged collar 43 flattened on one side adjacent to the nozzle cap 31a. This collar 43, which is widened at an acute angle to the discharge opening 26a, engages in an opening 44 in the discharge nozzle 7a which is adapted to it and which is enlarged compared to the outer diameter of the annular groove 30a and which forms a section of the outlet channel 25a. The component 42 can be sprinkled from the free end into the opening 44 with the elastic widening of the discharge nozzle 7a in such a way that it is then axially secured without play and held in a centered manner. At its end facing away from the support mandrel 33a, the component 42 has, following the collar 43, a guide mandrel 45, the diameter of which is substantially smaller than the inner diameter of the associated section of the outlet channel 25a and which is surrounded by a valve spring 46 of the outlet valve 27a. This outlet valve 27a has a valve body 28a formed by a ball and axially movable against the spring force of the valve spring 46 in the open position, to which an inner shoulder in the sleeve extension 8a is assigned as valve seat 47. In this embodiment, therefore, the exhaust valve is not as in the embodiment 1 to 3 a component of the piston unit, but a component of the housing 2a and the discharge nozzle 7a.

Zur Befüllung der Austragvorrichtungen gemäß den Fig. 1 bis 4 wird er Zylinderbehälter 12 zunächst mit dem aus­zutragenden Medium im wesentlichen vollständig gefüllt, wonach der mit dem Gehäuse 2 und dem Auslaßventil 27 fertig vormontierte Pumpkolben 20 in das offene Ende des Zylinderbehälters 12 eingeführt wird. Der Zylinderbehäl­ter 12 wird dabei so weit über den Pumpkolben 20 gescho­ben, bis das Auslaßventil 27 öffnet und hierdurch die eingeschlossene Luft nach außen gelassen wird. Im Ver­lauf dieser Bewegung gleitet der Einsprengflansch 18 mit einer an seinem Außenumfang vorgesehenen kegelstumpfför­migen Aufweitfläche an einer entsprechenden kegelstumpf­förmigen, am Innenumfang des Anschlagnockens 18 vorgese­henen Gegenfläche, so daß die Innenhülse 9 aufgeweitet wird, bis der Einsprengflansch 18 hinter die Innenschul­ter 11 springt.1 to 4, the cylinder container 12 is initially completely filled with the medium to be discharged, after which the pump piston 20, pre-assembled with the housing 2 and the outlet valve 27, is inserted into the open end of the cylinder container 12. The cylinder container 12 is pushed so far over the pump piston 20 until the outlet valve 27 opens and the enclosed air is thereby let out. In the course of this movement, the recess flange 18 slides with a frustoconical widening surface provided on its outer circumference on a corresponding frustoconical counter surface provided on the inner circumference of the stop cam 18, so that the inner sleeve 9 is widened until the recess flange 18 jumps behind the inner shoulder 11.

Claims (10)

1. Austragvorrichtung für fließfähige Medien, insbeson­dere Zerstäuber, mit einem in einem Gehäuse (2) vor­gesehenen Medienspeicher (13) mit Schubkolbenpumpe, die einen an einer Kolbenlaufbahn (19) eines Pumpen­zylinders zwischen einer Ausgangslage und einer Pumphub-Endlage verschiebbar geführten Pumpkolben (20) sowie eine durch den Pumpenzylinder gebildete, mit einer Austragöffnung (26) der Vorrichtung (1) über einen Auslaßkanal (25) verbundene Pumpenkammer (14) in Form einer das Austragvolumen je vollen Pumphub bestimmenden Dosierkammer aufweist, dadurch gekennzeichnet, daß der gesamte Medienspeicher (13) der Vorrichtung (1) durch die dem Pumpkolben (20) gegenüberliegend fest verschlossene Pumpenkammer (14) gebildet ist und daß das Speichervolumen dieses Medienspeichers (13) etwa einem einzigen Austragvo­lumen entspricht.1. Discharge device for flowable media, in particular atomizers, with a media reservoir (13) provided in a housing (2) with a thrust piston pump which has a pump piston (20) which is displaceably guided on a piston raceway (19) of a pump cylinder between an initial position and a pump stroke end position. and a pump chamber (14) formed by the pump cylinder and connected to a discharge opening (26) of the device (1) via an outlet channel (25) in the form of a metering chamber which determines the discharge volume per full pump stroke, characterized in that the entire media reservoir (13 ) of the device (1) by the pump chamber (20) opposite firmly closed pump chamber (14) is formed and that the storage volume of this media store (13) corresponds approximately to a single discharge volume. 2. Austragvorrichtung, insbesondere nach Anspruch 1, dadurch gekennzeichnet, daß die Pumpenkammer (14) durch einen napfförmigen Zylinderbehälter (12) ge­bildet ist, der an einer Stirnseite (15) mit einer insbesondere einteilig mit dem übrigen Zylinderbe­hälter ausgebildeten Stirnwand (16) verschlossen ist, wobei vorzugsweise der Zylinderbehälter (12) unmittelbar mit einer Handhabe (36) zum axialen Ver­schieben gegenüber dem Pumpkolben (20) verbunden ist und daß diese Handhabe insbesondere durch die, bei­spielsweise mit einer Daumenkuhle (37) versehene, Außenseite der Stirnwand (16) des Zylinderbehälters (12) gebildet ist.2. Discharge device, in particular according to claim 1, characterized in that the pump chamber (14) is formed by a cup-shaped cylinder container (12) which is closed on one end face (15) with an end wall (16) formed in particular in one piece with the rest of the cylinder container , Preferably the cylinder container (12) is directly connected to a handle (36) for axial displacement relative to the pump piston (20) and that this handle is provided in particular by the outside of the end wall (16) provided, for example, with a thumb cavity (37) Cylinder container (12) is formed. 3. Austragvorrichtung, insbesondere nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß ein Zylinderbe­hälter (12), vorzugsweise im wesentlichen frei ab­stehend, unmittelbar am übrigen, insbesondere ein­teiligen Gehäuse (2) gelagert ist.3. Discharge device, in particular according to claim 1 or 2, characterized in that a cylinder container (12), preferably substantially freely projecting, is mounted directly on the rest, in particular one-piece housing (2). 4. Austragvorrichtung, insbesondere nach einem der vor­hergehenden Ansprüche, dadurch gekennzeichnet, daß das Gehäuse (2) als den innenliegenden Zylinderbe­hälter (12) umgebende, an der von der Austragöffnung (26) abgekehrten Seite offene Gehäusekappe ausgebil­det ist, die vorzugsweise im Mantel (5) einen etwa über die Länge des Zylinderbehälters (12) reichenden Daumeneingriffs-Ausschnitt (40) aufweist.4. Discharge device, in particular according to one of the preceding claims, characterized in that the housing (2) as the inner cylinder container (12) surrounding, on the side facing away from the discharge opening (26) open housing cap is formed, which is preferably in the jacket (5th ) has a thumb engagement cutout (40) extending approximately over the length of the cylinder container (12). 5. Austragvorrichtung, insbesondere nach einem der vor­hergehenden Ansprüche, dadurch gekennzeichnet, daß der Zylinderbehälter (12) in eine Innenhülse (9) des Gehäuses (2) eingreift und vorzugsweise in der Aus­gangslage mit einem an seinem offenen Ende über den Außenumfang vorstehenden, ringförmigen Einspreng­flansch (18) an einer Innenschulter (11) der Innen­hülse (9) anliegt.5. Discharge device, in particular according to one of the preceding claims, characterized in that the cylinder container (12) engages in an inner sleeve (9) of the housing (2) and preferably in the starting position with a projecting at its open end on the outer circumference, annular injection flange (18) abuts an inner shoulder (11) of the inner sleeve (9). 6. Austragvorrichtung, insbesondere nach einem der vor­hergehenden Ansprüche, dadurch gekennzeichnet, daß der Pumpkolben vom Auslaßkanal (25) durchsetzt ist, der vorzugsweise koaxial zum Pumpkolben (20) und einem diesen tragenden Kolbenstößel (23) liegt und daß in der Pumpenkammer (14) ein beim Pumphub in den Auslaßkanal (25) eintauchender Verdrängungskörper (34), insbesondere ein von der Stirnwand (16) des Zylinderbehälters (12) nach innen frei vorstehender, längsgeschlitzter Verdrängungsdorn vorgesehen ist.6. Discharge device, in particular according to one of the preceding claims, characterized in that the pump piston is penetrated by the outlet channel (25), which is preferably coaxial with the pump piston (20) and a piston tappet carrying this (23) and that in the pump chamber (14) a displacement body (34) which plunges into the outlet channel (25) during the pump stroke, in particular a longitudinally slotted displacement mandrel which projects freely inward from the end wall (16) of the cylinder container (12). 7. Austragvorrichtung, insbesondere nach einem der vor­hergehenden Ansprüche, dadurch gekennzeichnet, daß im Auslaßkanal (25) ein mit dem Pumphub öffnender, dichter Verschluß, vorzugsweise ein Auslaß-Ventil (27), wie ein Kugelventil, ein Schlauchventil o.dgl., angeordnet ist.7. discharge device, in particular according to one of the preceding claims, characterized in that arranged in the outlet channel (25) with the pump stroke, tight closure, preferably an outlet valve (27), such as a ball valve, a hose valve or the like is. 8. Austragvorrichtung, insbesondere nach einem der vor­hergehenden Ansprüche, dadurch gekennzeichnet, daß die Austragvorrichtung (26) durch eine Zerstäuber­düse (32) gebildet ist, die insbesondere kappenför­mig und in eine Öffnung (30) im Ende eines Austrag­stutzens (7) eingesetzt ist, wobei in die Düsenkappe (31) ein teilweise im Wandabstand von dieser liegen­ der Stützdorn (33) eingreift, der vorzugsweise durch einen gesonderten, in den Auslaßkanal (25a) axial gesichert eingesprengten Bauteil gebildet ist und insbesondere einen Führungsdorn (45) für eine Ven­tilfeder (46) des Auslaß-Ventiles (27a) bildet.8. discharge device, in particular according to one of the preceding claims, characterized in that the discharge device (26) is formed by an atomizing nozzle (32) which is in particular cap-shaped and inserted into an opening (30) in the end of a discharge nozzle (7), wherein lie in the nozzle cap (31) partially at a distance from the wall the support pin (33) engages, which is preferably formed by a separate component axially secured in the outlet channel (25a) and in particular forms a guide pin (45) for a valve spring (46) of the outlet valve (27a). 9. Austragvorrichtung, insbesondere nach einem der vor­hergehenden Ansprüche, dadurch gekennzeichnet, daß die der Austragöffnung (26) zugekehrte Stirnwand (6) des Gehäuses (2) als längliche Drücker-Handhabe (38) ausgebildet ist. wobei vorzugsweise das Gehäuse (2) in Axialansicht etwa elliptisch ist.9. discharge device, in particular according to one of the preceding claims, characterized in that the discharge opening (26) facing end wall (6) of the housing (2) is designed as an elongated handle handle (38). the housing (2) preferably being approximately elliptical in axial view. 10. Austragvorrichtung, insbesondere nach einem der vor­hergehenden Ansprüche, dadurch gekennzeichnet, daß der Pumpkolben (20) durch einen gesonderten, mit einem schlauchförmigen Ansatz in einen Hülsenansatz (8) des Gehäuses (2) gesteckten Bauteil gfebildet ist.10. Discharge device, in particular according to one of the preceding claims, characterized in that the pump piston (20) is formed by a separate component with a tubular extension into a sleeve extension (8) of the housing (2).
EP86111115A 1985-09-14 1986-08-12 Fluid-dispensing device Expired - Lifetime EP0218840B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3532890 1985-09-14
DE3532890 1985-09-14

Publications (3)

Publication Number Publication Date
EP0218840A2 true EP0218840A2 (en) 1987-04-22
EP0218840A3 EP0218840A3 (en) 1987-08-12
EP0218840B1 EP0218840B1 (en) 1991-02-06

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ID=6281013

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86111115A Expired - Lifetime EP0218840B1 (en) 1985-09-14 1986-08-12 Fluid-dispensing device

Country Status (4)

Country Link
US (1) US4921142A (en)
EP (1) EP0218840B1 (en)
JP (1) JPH07102873B2 (en)
DE (3) DE8526339U1 (en)

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FR2678906A1 (en) * 1991-07-10 1993-01-15 Valois Device for spraying a predetermined dose of a fluid product, and its filling method
GB2262137A (en) * 1991-11-16 1993-06-09 Pfeiffer Erich Gmbh & Co Kg Dispenser for media
WO1993024164A1 (en) * 1992-06-03 1993-12-09 Astra Aktiebolag Arrangement and method for dispensing preservative-free nasal sprays and similar preparations
GR1001447B (en) * 1992-12-08 1993-12-30 Ron Poulenk Rorer Anonymos Emp Pharmaceutical products for the endonosal administration of caltcitonine.
US5307953A (en) * 1991-12-03 1994-05-03 Glaxo Group Limited Single dose dispenser having a piercing member
DE19753147A1 (en) * 1997-11-29 1999-06-02 Pfeiffer Erich Gmbh & Co Kg Dispenser with a manually operated dispenser
US6000580A (en) * 1992-06-03 1999-12-14 Astra Aktielbolag Device for dispensing preservative-free nasal sprays and similar preparations
CN110180701A (en) * 2016-09-14 2019-08-30 固瑞克明尼苏达有限公司 Piston-valve engagement in fluid ejector

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DE102013001571B4 (en) * 2013-01-30 2021-02-04 Aero Pump Gmbh Dispensing device for fluids from a fluid container
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USD828543S1 (en) * 2017-08-01 2018-09-11 Khanquer Pharma, Inc. Dual nostril nasal spray device

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EP0311863A2 (en) * 1987-10-10 1989-04-19 Ing. Erich Pfeiffer GmbH & Co. KG Device for dispersing a fluid
JPH01139376A (en) * 1987-10-10 1989-05-31 Ing Erich Pfeiffer Gmbh & Co Kg Discharger
EP0311863A3 (en) * 1987-10-10 1990-01-24 Ing. Erich Pfeiffer Gmbh & Co. Kg Device for dispersing a fluid
US4946069A (en) * 1987-10-10 1990-08-07 Ing. Erich Pfeiffer Gmbh & Co. Kg Dispenser for manually discharging flowable media
FR2625981A1 (en) * 1988-01-15 1989-07-21 Valois Sa Device for spraying the contents of a cylindrical phial
EP0388651A2 (en) * 1989-03-18 1990-09-26 Ing. Erich Pfeiffer GmbH Device for discharging a fluid
EP0388651A3 (en) * 1989-03-18 1991-05-29 Ing. Erich Pfeiffer GmbH Device for discharging a fluid
US5171219A (en) * 1989-06-08 1992-12-15 Sumitomo Pharmaceuticals Co., Ltd. Pharmaceutical preparation administrator
WO1991013281A1 (en) * 1990-02-22 1991-09-05 Ing. Erich Pfeiffer Gmbh & Co. Kg Dispenser for media
WO1993000172A1 (en) * 1991-06-26 1993-01-07 Valois (Societe Anonyme) Device for dispensing a predetermined dose of fluid product, and method of filling thereof
FR2678906A1 (en) * 1991-07-10 1993-01-15 Valois Device for spraying a predetermined dose of a fluid product, and its filling method
GB2262137A (en) * 1991-11-16 1993-06-09 Pfeiffer Erich Gmbh & Co Kg Dispenser for media
US5307953A (en) * 1991-12-03 1994-05-03 Glaxo Group Limited Single dose dispenser having a piercing member
WO1993024164A1 (en) * 1992-06-03 1993-12-09 Astra Aktiebolag Arrangement and method for dispensing preservative-free nasal sprays and similar preparations
AU674686B2 (en) * 1992-06-03 1997-01-09 Astra Aktiebolag Arrangement and method for dispensing preservative-free nasal sprays and similar preparations
US6000580A (en) * 1992-06-03 1999-12-14 Astra Aktielbolag Device for dispensing preservative-free nasal sprays and similar preparations
US6116468A (en) * 1992-06-03 2000-09-12 Astra Aktiebolag Arrangement and method for dispensing preservative-free nasal sprays and similar preparations
GR1001447B (en) * 1992-12-08 1993-12-30 Ron Poulenk Rorer Anonymos Emp Pharmaceutical products for the endonosal administration of caltcitonine.
DE19753147A1 (en) * 1997-11-29 1999-06-02 Pfeiffer Erich Gmbh & Co Kg Dispenser with a manually operated dispenser
US6364166B1 (en) 1997-11-29 2002-04-02 Ing. Erich Pfeiffer Gmbh Dispenser with manually operable discharge device
CN110180701A (en) * 2016-09-14 2019-08-30 固瑞克明尼苏达有限公司 Piston-valve engagement in fluid ejector
CN110180701B (en) * 2016-09-14 2021-11-12 固瑞克明尼苏达有限公司 Piston-valve engagement in a fluid injector
US11371492B2 (en) 2016-09-14 2022-06-28 Graco Minnesota Inc. Piston-valve engagement in fluid sprayers

Also Published As

Publication number Publication date
JPH07102873B2 (en) 1995-11-08
DE3631341C2 (en) 1997-07-10
EP0218840B1 (en) 1991-02-06
DE3677451D1 (en) 1991-03-14
DE8526339U1 (en) 1987-05-07
US4921142A (en) 1990-05-01
JPS6264754A (en) 1987-03-23
EP0218840A3 (en) 1987-08-12
DE3631341A1 (en) 1987-04-23

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