EP0388651B1 - Device for discharging a fluid - Google Patents

Device for discharging a fluid Download PDF

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Publication number
EP0388651B1
EP0388651B1 EP90103388A EP90103388A EP0388651B1 EP 0388651 B1 EP0388651 B1 EP 0388651B1 EP 90103388 A EP90103388 A EP 90103388A EP 90103388 A EP90103388 A EP 90103388A EP 0388651 B1 EP0388651 B1 EP 0388651B1
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EP
European Patent Office
Prior art keywords
valve
pump
discharge
valve seat
plunger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90103388A
Other languages
German (de)
French (fr)
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EP0388651A2 (en
EP0388651A3 (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
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Publication date
Application filed by Erich Pfeiffer GmbH, Ing Erich Pfeiffer GmbH filed Critical Erich Pfeiffer GmbH
Publication of EP0388651A2 publication Critical patent/EP0388651A2/en
Publication of EP0388651A3 publication Critical patent/EP0388651A3/en
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Publication of EP0388651B1 publication Critical patent/EP0388651B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0062—Outlet valves actuated by the pressure of the fluid to be sprayed
    • B05B11/007—Outlet valves actuated by the pressure of the fluid to be sprayed being opened by deformation of a sealing element made of resiliently deformable material, e.g. flaps, skirts, duck-bill valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/02—Membranes or pistons acting on the contents inside the container, e.g. follower pistons

Definitions

  • the invention relates to a discharge device for media according to the preamble of claim 1.
  • the discharge device is assigned at least one discharge pump.
  • a discharge device is known in which both valve parts are arranged on one and the same pump part and a deformable valve part is not deformed directly by the fluid pressure but by radial mechanical pressure.
  • the discharge device according to FR-A-2 635 084 does not have a discharge pump, but only a valve part that can be deformed under fluid pressure.
  • the discharge device with discharge pump according to EP-A-0 218 840, from which the preamble of claim 1 is delimited, has the two valve parts of a valve on the same of the two pump parts that can be moved relative to one another for manual pump actuation.
  • the invention has for its object to provide a discharge device of the type mentioned, in which the disadvantages of known designs are avoided, in particular the discharge of the medium also in particular compact or small-sized training can be controlled very well and possibly allows the simplest possible training.
  • Means are provided by which at least one valve body on the inside of at least one valve of the discharge device can change shape for the valve function and thereby at least partially determine at least one closed position or at least one open position of the valve.
  • the valve could be an inlet valve, a pure air valve, such as a ventilation valve, and / or preferably an outlet valve.
  • valve body for transferring to the open position in the direction of at least one cross-sectional extent, in particular essentially is narrowed evenly over its entire circumference under the excess pressure and / or mechanical means occurring on the corresponding side of the valve seat.
  • At least one pump chamber is connected to at least one outlet channel with the interposition of at least one outlet valve, which may open under excess pressure in the pump chamber, and has at least one outlet valve and at least one valve body which can be transferred between at least one closed and at least one open position and which is located internally, as well as at least one valve seat.
  • the discharge device should in particular be suitable for the sprayed or atomized discharge of liquid media, for the jet-like or strand-like discharge of pasty media or the like.
  • the media Pharmaceutical, cosmetic or similar agents, for example also technical aids, can be expediently applied by manual operation of the discharge device or the discharge pump.
  • At least one valve body could be formed by a pressure-elastic solid body, such as a ball, a cylinder or the like.
  • a pressure-elastic solid body such as a ball, a cylinder or the like.
  • means are expediently provided for this valve body, for example in the closed position, to be a substantially sealed system by means of at least one sealing lip experiences. If this sealing lip is not provided on the valve seat but on the valve body, then this can practically only be formed by a sealing lip-shaped component or component section.
  • the valve seat could also be elastically deformable depending on the pressure, for example in the manner of a hose valve, but there is a particularly reliable function if the valve seat is formed by a component which is dimensionally stable at least in its area, so that the valve movements are carried out exclusively by the valve body inside .
  • the valve seat is formed by a bore, for example forming a section of the outlet channel, which has essentially constant cross sections on at least one longitudinal section belonging to the valve body, the valve body can be functionally changed axially in relation to this bore without changing the function of the valve got to.
  • a path-dependent function of the valve can also be provided, in which case a change in shape is not absolutely necessary.
  • valve body or the valve seat as, for example, a one-part component with a functional part of the discharge device which is provided for a further movement which does not serve the valve function.
  • This movement can lie transversely or at right angles to, for example, the radially narrowing valve movement.
  • the two valve parts can be changed relative to one another both with regard to the valve function and in a further movement.
  • the valve body can easily carry out the further movement, it is expediently provided on at least one, in particular on the free end of a shaft, which extends essentially parallel to this direction of movement and only further away from the valve body with its lying end is supported.
  • At least one valve body on the inside or its sealing lip can be formed by a separate component or can be formed in one piece with the stem.
  • a discharge device possibly including a thrust piston pump and including at least one valve, can be created from only two or three one-piece components.
  • the discharge device is particularly suitable for being designed as a one-way discharge device, in which medium is not drawn in from each pump stroke from a media store via an inlet valve into the pump chamber, but in which the entire storage volume is contained in the pump chamber from the outset.
  • a discharge device is e.g. DE-OS 36 31 341 to which reference is made for further features, details and effects.
  • the discharge device can also be designed so that it consists of e.g. refillable media storage in the pump chamber, for example engages in a container neck of the media storage.
  • the discharge device 1 has a discharge pump 2 designed as a push piston pump, which is essentially formed by a pump cylinder 3 and a pump piston 4 guided on its running surface with at least one annular piston lip 5.
  • the pump piston 5 is provided in the illustrated embodiment with at least two, in particular three, with a small axial distance from one another and integrally formed with it, sawtooth-shaped, the same piston lips 5, which taper in cross-section to their annular lip edges at different flank angles and of which the foremost is immediately adjacent to the associated end face of the pump piston 4.
  • elastically resiliently bendable piston lips slide under prestress on the cylinder running surface.
  • a pump chamber 6 is delimited within the pump cylinder 3, which in the exemplary embodiment shown can only be opened in the direction of an outlet channel.
  • the pump cylinder 3 or the pump chamber 6 is in fact formed by a cup-shaped cylinder container 7, the open side of which is mounted only by pushing it onto the pumping piston 4, the pump chamber 6 of which, in the assembled state, is substantially completely filled with the medium to be discharged.
  • the outlet nozzle 9 can e.g. be designed as an atomizer nozzle with a radial or tangential inlet and an axial outlet.
  • the outlet channel 8 can be closed with an outlet valve 10, which essentially consists of two interlocking valve parts, namely a one-piece design with the cylinder container 7, inside lying valve body 11 with sealing lip 12 and a valve seat 13 formed in one piece with the pump piston 4.
  • the valve seat 13 lies within the pump piston 4 or a piston shaft 14 connected in one piece to it, which has approximately the same external cross-sections as the pump piston 4 between the piston lips 5 and extends approximately to the outlet nozzle 9 or in the area thereof forms at least part of a swirl device for guiding the flow of the medium supplied to the outlet nozzle 9 and can be several times longer than the pump piston 4.
  • the valve seat 13 which has constant internal cross sections over its length, is formed by at least one longitudinal section of a blind bore 15 lying in the pump piston 4 and in the piston shaft 14, essentially in the central axis thereof, the open end of which lies in the front end face of the pump piston 4 and whose length is several times greater than their diameter is.
  • the blind hole 15 has constant internal cross sections over its entire length and expediently also forms the valve seat 13 essentially over its entire length.
  • at least one narrower, approximately radial transverse channel 16 is guided to the outer circumference of the piston skirt 14 from the blind hole 15 .
  • the only channel groove 17 connected to a single transverse channel 16 is provided in the outer circumference of the piston shaft 14 and is closed over its length on its open groove side by a discharge sleeve 18 which extends the piston shaft 14 approximately to the pump piston 4 or to the associated rearmost one Piston lip 5 and closely surrounds substantially over its entire length.
  • the outlet valve 10 and the discharge nozzle 9 are in the pump axis 20.
  • valve body 11 could e.g. be arranged or held on the component forming the valve seat 13 or on the pump piston 4, wherein a design which is in one piece with this component may be conceivable.
  • the valve body 11 is connected to a component which can be displaced simultaneously with the pump stroke, namely the pump cylinder 3 or the cylinder container, in such a way that it also carries out the pump stroke movement relative to the valve seat 13.
  • the valve body 11 with the valve seat 13 or the blind bore 15 forms a further pump in the form of a thrust piston pump directly downstream in the flow direction of the pump chamber 6, the effective cross sections of which are substantially smaller than those of the pump chamber 6.
  • This further pump is filled during the pumping stroke from the pump chamber 6 and at the same time accelerates the medium introduced into it in the direction of the discharge nozzle 9, the valve body 11 with a shaft 22 carrying it acting primarily as a displacement piston in the blind hole 15.
  • the blind hole 15 is completely free in cross section between the valve body 11 and its bottom.
  • the valve body 11 is designed in the manner of a hollow sleeve or ring body, for which it is provided on its front end face in the flow direction with a blind hole-like recess 19 which is widened at an acute angle to its open end face and whose axial extent is approximately in the order of magnitude of its greatest width .
  • the sealing lip 12, which is ring-shaped in cross-section and essentially forms the entire valve body 11, is at least slightly tapered in cross-section with respect to its annular end face which is at the front in the direction of flow End face on the outer circumference forms the radially outward most protruding, annular sealing edge 21 with an acute angle in cross section, which also protrudes slightly radially beyond the outer circumference of the shaft 22.
  • the shaft 22 has essentially constant outer cross sections over its entire or effective length, which are only slightly smaller than the inner cross sections of the valve seat 13 or the blind hole 15, so that the valve body 11 and the shaft 22 with the valve seat 13 form a gap-shaped annular channel limit, the cross section of which can be of the order of the transverse channel 16.
  • the sealing lip 12 or the sealing edge 21 is dimensioned such that it rests on the valve seat 13 with a resilient bias in the idle state and the outlet valve 10 is thereby closed.
  • the shaft 22 is free from engaging parts and can therefore have full cross sections over its length.
  • the sealing lip 12 projecting freely in cross-section in the conveying direction can be elastically resiliently so radially narrowed that its outer circumference is approximately the same width as that of the shaft 22 or, in contrast, is even smaller, so that the said annular channel then connects the pump chamber 6 and the Outlet channel 8 releases. Due to the design described, the valve body 11 forms a closure in the idle state, the closing force of which increases with excess pressure in the outlet channel 8. With negative pressure in the outlet channel 8 or with excess pressure in the pump chamber 6, on the other hand, the valve body 11 becomes narrower or narrower in the manner mentioned depending on the pressure.
  • valve body 11 or the shaft 22 could be held with webs projecting approximately radially. In the illustrated embodiment, however, the valve body 11 is exclusively with the one facing away from it End of the shaft 22 is held, which integrally connects to the inside of the bottom wall 23 of the cylinder container 7, so that the shaft 22 extends substantially over the entire length of the pump chamber 6 and free of space within this or like the valve body essentially between the ends of the cylinder or the pump chamber.
  • valve body 11 protrudes freely towards the open or discharge end of the pump cylinder 3, but is set back relative to this end in such a way that it already engages in the valve seat 13 when the pump piston 4 is inserted and in its initial position, but directly adjacent to the front end face of the Pump piston 4 lies within this.
  • the valve body 11 contributes to securing the pump cylinder 3 with respect to the pump piston 4 against forces acting transversely to the pump axis 20.
  • the cylinder container 7 is mounted and secured only by being plugged onto the pumping piston 4 and is otherwise without support relative to the rest of the discharge device 1, in particular on the outer circumference. This makes it very easy to replace the cylinder container 7 after being removed.
  • the pump cylinder 3 On the one hand and the pump piston 4 on the other hand.
  • the handle 24 of the cylinder container 3 is formed by its bottom wall 23, which forms a correspondingly recessed thumb cavity on its outside.
  • the cylinder container 7 At the opposite or open end, the cylinder container 7 has an annular collar 25 which projects only over its outer circumference, the pump cylinder 3 at this end being closed exclusively by the inserted pump piston 4 and not, for example, additionally by a cylinder cover, a cap or the like.
  • the piston raceway is widened slightly conically at the insertion end.
  • the pump piston 4 is in his front end surface provided with an approximately spherical cap-shaped recess 26, which essentially adjoins the front, frusto-conical flank of the foremost piston lip 5, the cross-sectional shape formed thereby being essentially completely complementary to the cross-sectional shape of the inner surface of the bottom wall 23, against which the pump piston 4 is connected its front end surface can be moved to a narrow, essentially gap-free system.
  • the pump chamber 6 can practically be narrowed to a volume-free dimension and thus be emptied almost completely.
  • the discharge nozzle 9 is provided at the end of a discharge nozzle 27 which is frusto-conical and essentially lies in the pump axis 20, the outer circumference of which is essentially formed by an outer sleeve 28.
  • the rear end of the outer sleeve 28 is formed in one piece with a cap 30 which is elongated in the axial view, namely, for example is essentially flat-oval or elliptical.
  • the smaller cross-sectional extent is approximately in the order of magnitude of the associated outer width of the rear end of the discharge nozzle 27, while the larger cross-sectional extension is several times larger, so that two pressure handles 29 lying on opposite sides of each other are formed by the corresponding cap end wall 31 .
  • Their pressure surfaces are expediently inclined to the discharge nozzle 27 at a small angle so that they are towards them increase the outer ends in the axial distance from the handle 24, so that with one-handed actuation there is no danger that the two fingers resting on the handles 29 can slip outwards.
  • cap end wall 31 The same shape as the cap end wall 31 has the cap jacket 32 in all cross sections substantially parallel to the pump axis 20 and protrudes against the discharge nozzle 9 freely over the full width so far that it protrudes relatively far beyond the cylinder container 7 in the starting position.
  • the cap jacket 32 On one or both long sides, the cap jacket 32 is provided with a thumb-engaging cutout 33 which extends from its rear end edge and extends approximately to the region of the front end surface of the pump piston 4 and which, like this end surface, is at a short distance from the end wall 31.
  • the filled discharge device 1 which is in the initial position, is gripped with one hand and the cylinder container 7 is pushed further onto the piston shaft 14.
  • the valve body 11 is compressed according to FIG. 3, so that the medium from the pump chamber 6 can pass through the annular channel into the blind hole 15.
  • the valve body 11 moves within the blind bore 15 in the discharge direction, so that the chamber volume of the cylindrical blind bore 15 is also reduced and the medium is also displaced from this bore, which narrows like a pump chamber.
  • the front, free end face of the valve body 11 is in the region of the boundary of the transverse channel 16 facing the pump piston 4, so that only a very small, undisplaced residual volume is left in the blind hole 15 remains.
  • this residual volume can also be reduced to a value towards zero will.
  • the front end thereof is widened slightly conically, it connecting to the recess 26.
  • the discharge device including at least one valve can be produced from a very small number of plastic parts without any use of metallic parts, it even being possible to form two pumps connected in series.
  • the bottom of the cylinder container 7 would have to be provided with a corresponding suction or inlet opening for connection to a storage tank, this inlet then being assigned a valve of the type according to the invention as an inlet valve.
  • valve body of this inlet valve could be in the same direction as the valve body 11 of the exhaust valve in a valve seat formed by the cylinder container with respect to the direction of the fault and possibly also be formed in one piece with the cylinder container, in which case the valve body cannot be arranged displaceably with respect to the valve seat needs.
  • the design according to the invention is particularly suitable for extremely small discharge devices with a piston diameter of the order of between 3 and 15 mm, in particular of the order of about 5 mm.
  • the valve body 11 can have a width in the order of less than 1 mm to more than 5 mm, in particular in the order of about 1.5 to 2 mm. In contrast, its length can be approximately one third smaller, while the stem length is several times greater than the length of the valve body or the stem diameter.
  • FIGS. 4 to 7 the same reference numerals are used for corresponding parts as in FIGS. 1 to 3, but with different letter indices, which is why corresponding description parts apply to all the figures.
  • FIGS. 4 and 5 show an embodiment in which the valve opens either exclusively or at least partially depending on the path, so that an elastic change in the shape of the valve body is not absolutely necessary for opening the exhaust valve.
  • the valve body not shown, is expediently designed the same as in the embodiment according to FIGS.
  • the longitudinal profiles 34 gradually increase in depth at a very shallow angle to their maximum depth, the length of which Initial section 35 can correspond to about a third to a quarter of the total length of the longitudinal profiles 34.
  • the valve body first reaches the area of the initial sections 35 and then the areas of constant depth of the longitudinal profiles 34, so that even at a very low pressure medium which is insufficient for an elastic shape change of the valve body the sealing lip of the valve body and the valve seat can flow to the outlet opening in the manner of a path-dependent slide-controlled valve. If the pressure is increased sufficiently strongly by correspondingly strong actuation of the discharge pump, it additionally leads to an elastic change in shape of the valve body which widens the passage cross sections. The amount of media applied per unit of time can be fine-tuned.
  • the longitudinal profiles 34 extend to the transverse bore 16a, so that a section of the valve seat free of longitudinal profiles, which is only penetrated by the transverse bore 16a, is connected to the bottom of the blind hole.
  • the longitudinal profiles 34b are formed by longitudinal ribs which are angularly limited in cross section, which have a sharp rib edge and rib flanks lying at an acute angle to one another and are each approximately symmetrical to an axial plane of the valve seat 13b.
  • These longitudinal profiles 34b press, as soon as the valve body runs onto it, its sealing lip notches-like, so that a narrow transition opening for the medium is created on both sides of the respective longitudinal profile, which can be enlarged by a corresponding increase in pressure and the resulting change in shape of the valve body.
  • the longitudinal profiles 34b extend all the way to that Longitudinal section of the valve seat 13b, in which the transverse bore 16b passes through it, namely approximately to the bottom of the blind bore 15b.

Abstract

In a discharge device (1) for free-flowing media, an outlet valve (10) has an internal valve body (11) which can be elastically compressed by an excess pressure on the inlet side and, together with the pump parts of a discharge pump (2) which can be displaced with respect to one another, can be displaced with respect to its valve seat (13) so that, together with an associated valve body shaft (22), it forms an expulsion piston which conveys media out of a blind bore (15). As a result, a very reliable valve function and a discharge at high flow rates can be achieved with an extremely simple design. <IMAGE>

Description

Die Erfindung betrifft eine Austragvorrichtung für Medien nach dem Oberbegriff des Patentanspruches 1. Zur Erzielung einer besonders gut steuerbaren Ausbringung des Mediums ist der Austragvorrichtung mindestens eine Austragpumpe zugeordnet.The invention relates to a discharge device for media according to the preamble of claim 1. In order to achieve a particularly well controllable discharge of the medium, the discharge device is assigned at least one discharge pump.

Durch die EP-A-0 289 856 ist eine Austragvorrichtung bekannt, bei welcher beide Ventilteile an ein und demselben Pumpenteil angeordnet sind und ein verformbarer Ventilteil nicht unmittelbar durch den Fluiddruck, sondern durch radialen mechanischen Druck verformt wird. Die Austragvorrichtung nach der FR-A-2 635 084 weist keine Austragpumpe, sondern lediglich einen unter Fluiddruck verformbaren Ventilteil auf. Die Austragvorrichtung mit Austragpumpe nach der EP-A-0 218 840, gegenüber der der Oberbegriff des Anspruchs 1 abgegrenzt ist, weist die beiden Ventilteile eines Ventiles am selben der beiden zur manuellen Pumpenbetätigung gegeneinander bewegbaren Pumpenteile auf.From EP-A-0 289 856 a discharge device is known in which both valve parts are arranged on one and the same pump part and a deformable valve part is not deformed directly by the fluid pressure but by radial mechanical pressure. The discharge device according to FR-A-2 635 084 does not have a discharge pump, but only a valve part that can be deformed under fluid pressure. The discharge device with discharge pump according to EP-A-0 218 840, from which the preamble of claim 1 is delimited, has the two valve parts of a valve on the same of the two pump parts that can be moved relative to one another for manual pump actuation.

Der Erfindung liegt die Aufgabe zugrunde, eine Austragvorrichtung der genannten Art zu schaffen, bei welcher die Nachteile von bekannten Ausbildungen vermieden sind, insbesondere sich der Austrag des Mediums auch bei besonders kompakter bzw. klein dimensionierter Ausbildung sehr gut steuern läßt und die ggf. eine möglichst einfache Ausbildung erlaubt.The invention has for its object to provide a discharge device of the type mentioned, in which the disadvantages of known designs are avoided, in particular the discharge of the medium also in particular compact or small-sized training can be controlled very well and possibly allows the simplest possible training.

Zur Lösung dieser Aufgabe sind die Merkmale des Patentanspruches 1 vorgesehen. Es sind Mittel vorgesehen, durch welche mindestens ein innen liegender Ventilkörper wenigstens eines Ventiles der Austragvorrichtung sich für die Ventilfunktion formverändern und dadurch mindestens eine Schließstellung oder mindestens eine Öffnungsstellung des Ventiles wenigstens teilweise bestimmen kann. Das Ventil könnte ein Einlaßventil, ein reines Luftventil, wie ein Belüftungsvertil, und/oder bevorzugt ein Auslaßventil, sein. Obwohl andere, insbesondere elastische Formveränderungen des innen liegenden Ventilkörpers zu dessen ggf. druckabhängigen Überführung zwischen einer Schließ- und einer Offenstellung denkbar sind, ergibt sich eine besonders vorteilhafte Ausbildung, wenn der Ventilkörper zur Überführung in die Offenstellung in Richtung wenigstens einer Querschnittserstreckung, insbesondere im wesentlichen über seinen gesamten Umfang gleichmäßig unter dem auf der entsprechenden Seite des Ventilsitzes auftretenden Überdruck und/oder mechanische Mittel verengt wird.To achieve this object, the features of claim 1 are provided. Means are provided by which at least one valve body on the inside of at least one valve of the discharge device can change shape for the valve function and thereby at least partially determine at least one closed position or at least one open position of the valve. The valve could be an inlet valve, a pure air valve, such as a ventilation valve, and / or preferably an outlet valve. Although other, in particular elastic changes in shape of the inner valve body are conceivable for its possibly pressure-dependent transfer between a closed and an open position, a particularly advantageous embodiment results if the valve body for transferring to the open position in the direction of at least one cross-sectional extent, in particular essentially is narrowed evenly over its entire circumference under the excess pressure and / or mechanical means occurring on the corresponding side of the valve seat.

Bei der Austragvorrichtung ist mindestens eine Pumpenkammer unter Zwischenschaltung wenigstens eines ggf. unter Überdruck in der Pumpenkammer öffnenden Auslaßventiles an mindestens einen Auslaßkanal angeschlossen und weist wenigstens ein Auslaßventil mindestens einen ggf. druckabhängig zwischen wenigstens einer Schließ- und mindestens einer Öffnungsstellung überführbaren, innen liegenden Ventilkörper sowie wenigstens einen Ventilsitz auf. Die Austragvorrichtung soll insbesondere zum zersprühten bzw. zerstäubten Austrag von flüssigen Medien, zum strahl- bzw. strangartigen Austrag von pastösen Medien oder dgl. geeignet sein, wobei die Medien pharmazeutische, kosmetische oder ähnliche Mittel, beispielsweise auch technische Hilfsmittel sein können und zweckmäßig durch manuellen Betrieb der Austragvorrichtung bzw. der Austragpumpe ausgebracht werden.In the discharge device, at least one pump chamber is connected to at least one outlet channel with the interposition of at least one outlet valve, which may open under excess pressure in the pump chamber, and has at least one outlet valve and at least one valve body which can be transferred between at least one closed and at least one open position and which is located internally, as well as at least one valve seat. The discharge device should in particular be suitable for the sprayed or atomized discharge of liquid media, for the jet-like or strand-like discharge of pasty media or the like. The media Pharmaceutical, cosmetic or similar agents, for example also technical aids, can be expediently applied by manual operation of the discharge device or the discharge pump.

Mindestens ein Ventilkörper könnte durch einen druckelastischen Vollkörper, wie eine Kugel, einen Zylinder oder dgl., gebildet sein, jedoch sind zweckmäßig Mittel vorgesehen, daß dieser Ventilkörper z.B. in der Schließstellung durch wenigstens eine Dichtlippe eine im wesentlichen abgedichtete Anlage erfährt. Ist diese Dichtlippe nicht am Ventilsitz, sondern am Ventilkörper vorgesehen, so kann dieser praktisch nur durch einen dichtlippenförmigen Bauteil bzw. Bauteilabschnitt gebildet sein.At least one valve body could be formed by a pressure-elastic solid body, such as a ball, a cylinder or the like. However, means are expediently provided for this valve body, for example in the closed position, to be a substantially sealed system by means of at least one sealing lip experiences. If this sealing lip is not provided on the valve seat but on the valve body, then this can practically only be formed by a sealing lip-shaped component or component section.

Der Ventilsitz könnte zwar ebenfalls, beispielsweise nach Art eines Schlauchventiles, druckabhängig elastisch verformbar sein, jedoch ergibt sich eine besonders sichere Funktion, wenn der Ventilsitz durch einen wenigstens in seinem Bereich formsteifen Bauteil gebildet ist, so daß die Ventilbewegungen ausschließlich vom innen liegenden Ventilkörper ausgeführt werden. Ist der Ventilsitz durch eine beispielsweise einen Abschnitt des Auslaßkanales bildende Bohrung gebildet, die wenigstens auf einem dem Ventilkörper zugehörigen Längsabschnitt im wesentlichen konstante Querschnitte aufweist, so kann der Ventilkörper funktionsabhängig axial gegenüber dieser Bohrung lageverändert werden, ohne daß sich an der Funktion des Ventiles etwas ändern muß. Statt einer druckabhängigen Funktion kann aber auch eine wegabhängige Funktion des Ventiles vorgesehen sein, wobei dann eine Formveränderung nicht unbedingt erforderlich ist.The valve seat could also be elastically deformable depending on the pressure, for example in the manner of a hose valve, but there is a particularly reliable function if the valve seat is formed by a component which is dimensionally stable at least in its area, so that the valve movements are carried out exclusively by the valve body inside . If the valve seat is formed by a bore, for example forming a section of the outlet channel, which has essentially constant cross sections on at least one longitudinal section belonging to the valve body, the valve body can be functionally changed axially in relation to this bore without changing the function of the valve got to. Instead of a pressure-dependent function, a path-dependent function of the valve can also be provided, in which case a change in shape is not absolutely necessary.

Bei der lageveränderbaren Ausbildung ist es möglich, den Ventilkörper bzw. den Ventilsitz als z.B. einteiligen Bestandteil mit einem Funktionsteil der Austragvorrichtung auszubilden, der für eine weitere, nicht der Ventilfunktion dienende Bewegung vorgesehen ist. Diese Bewegung kann dabei quer bzw. rechtwinklig zur beispielsweise radial verengenden Ventilbewegung liegen. Die beiden Ventilteile sind insofern sowohl hinsichtlich der Ventilfunktion als auch in einer weiteren Bewegung gegeneinander lageveränderbar. Damit der Ventilkörper die weitere Bewegung ohne weiteres ausführen kann, ist er zweckmäßig an mindestens einem, insbesondere am freien Ende eines Schaftes vorgesehen, der sich im wesentlichen parallel zu dieser Bewegungsrichtung erstreckt und ausschließlich mit seinem vom Ventilkörper weiter entfernt liegenden Ende gehaltert ist. Mindestens ein innen liegender Ventilkörper bzw. dessen Dichtlippe kann dabei durch einen gesonderten Bauteil gebildet oder einteilig mit dem Schaft ausgebildet sein.With the position-changeable design, it is possible to design the valve body or the valve seat as, for example, a one-part component with a functional part of the discharge device which is provided for a further movement which does not serve the valve function. This movement can lie transversely or at right angles to, for example, the radially narrowing valve movement. In this respect, the two valve parts can be changed relative to one another both with regard to the valve function and in a further movement. So that the valve body can easily carry out the further movement, it is expediently provided on at least one, in particular on the free end of a shaft, which extends essentially parallel to this direction of movement and only further away from the valve body with its lying end is supported. At least one valve body on the inside or its sealing lip can be formed by a separate component or can be formed in one piece with the stem.

Durch die erfindungsgemäße Ausbildung kann eine Austragvorrichtung, ggf. einschließlich einer Schubkolbenpumpe und einschließlich wenigstens eines Ventiles, aus nur zwei oder drei einteiligen Bauteilen geschaffen werden. Dadurch ist die Austragvorrichtung insbesondere zur Ausbildung als Einweg-Austragvorrichtung geeignet, bei der nicht je Pumphub aus einem Medienspeicher über ein Einlaßventil in die Pumpenkammer Medium angesaugt wird, sondern bei welcher das gesamte Speichervolumen von vornherein in der Pumpenkammer enthalten ist. Eine solche Austragvorrichtung ist z.B. der DE-OS 36 31 341 zu entnehmen, auf die wegen weiterer Merkmale, Einzelheiten und Wirkungen Bezug genommen wird. Die Austragvorrichtung kann aber auch so ausgebildet sein, daß sie aus einem z.B. nachfüllbaren Medienspeicher in die Pumpenkammer ansaugt, beispielsweise in einen Behälterhals des Medienspeichers eingreift.With the design according to the invention, a discharge device, possibly including a thrust piston pump and including at least one valve, can be created from only two or three one-piece components. As a result, the discharge device is particularly suitable for being designed as a one-way discharge device, in which medium is not drawn in from each pump stroke from a media store via an inlet valve into the pump chamber, but in which the entire storage volume is contained in the pump chamber from the outset. Such a discharge device is e.g. DE-OS 36 31 341 to which reference is made for further features, details and effects. The discharge device can also be designed so that it consists of e.g. refillable media storage in the pump chamber, for example engages in a container neck of the media storage.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden näher erläutert. In den Zeichnungen zeigen:

Fig. 1
eine erfindungsgemäße Austragvorrichtung im Axialschnitt und in wesentlich vergrößerter Darstellung,
Fig. 2
einen Ausschnitt der Austragvorrichtung gemäß Fig. 1 in wesentlich vergrößerter Explosionsdarstellung,
Fig. 3
den Ausschnitt gemäß Fig. 2 in einer Pump-Betriebsstellung,
Fig. 4
eine weitere Ausführungsform einer Kolbeneinheit im Axialschnitt,
Fig. 5
die Kolbeneinheit gemäß Fig. 4 im Querschnitt und in vergrößerter Darstellung,
Fig. 6
ein weiteres Ausführungsbeispiel in einer Darstellung entsprechend Fig. 4 und
Fig. 7
einen Ausschnitt der Fig. 6 im Querschnitt und in wesentlich vergrößerter Darstellung.
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 axial section and in a substantially enlarged representation,
Fig. 2
1 shows a section of the discharge device according to FIG. 1 in a substantially enlarged exploded view,
Fig. 3
2 in a pump operating position,
Fig. 4
another embodiment of a piston unit in axial section,
Fig. 5
4 in cross section and in an enlarged view,
Fig. 6
a further embodiment in a representation corresponding to FIGS. 4 and
Fig. 7
a section of Fig. 6 in cross section and in a substantially enlarged view.

Die Austragvorrichtung 1 weist gemäß den Figuren 1 bis 3 eine als Schubkolbenpumpe ausgebildete Austragpumpe 2 auf, die im wesentlichen durch einen Pumpenzylinder 3 und einen an dessen Lauffläche mit mindestens einer ringförmigen Kolbenlippe 5 geführten Pumpkolben 4 gebildet ist. Der Pumpkolben 5 ist im dargestellten Ausführungsbeispiel mit mindestens zwei, insbesondere drei in geringem Axialabstand zueinander liegenden und einteilig mit ihm ausgebildeten, im Querschnitt sägezahnförmigen, gleichen Kolbenlippen 5 versehen, die im Querschnitt zu ihren ringförmigen Lippenkanten unter unterschiedlichen Flankenwinkeln spitz zulaufen und von denen die vorderste unmittelbar benachbart zur zugehörigen Stirnfläche des Pumpkolbens 4 liegt. Die entgegen der Richtung des Pumphubes elastisch federnd krümmbaren Kolbenlippen gleiten unter Vorspannung an der Zylinderlauffläche. Zwischen der vorderen Stirnfläche des Pumpkolbens 4 und einer gegenüberliegenden Stirnwand ist innerhalb des Pumpenzylinders 3 eine Pumpenkammer 6 begrenzt, die im dargestellten Ausführungsbeispiel nur in Richtung zu einem Auslaßkanal geöffnet werden kann.According to FIGS. 1 to 3, the discharge device 1 has a discharge pump 2 designed as a push piston pump, which is essentially formed by a pump cylinder 3 and a pump piston 4 guided on its running surface with at least one annular piston lip 5. The pump piston 5 is provided in the illustrated embodiment with at least two, in particular three, with a small axial distance from one another and integrally formed with it, sawtooth-shaped, the same piston lips 5, which taper in cross-section to their annular lip edges at different flank angles and of which the foremost is immediately adjacent to the associated end face of the pump piston 4. The opposite In the direction of the pump stroke, elastically resiliently bendable piston lips slide under prestress on the cylinder running surface. Between the front end face of the pump piston 4 and an opposite end wall, a pump chamber 6 is delimited within the pump cylinder 3, which in the exemplary embodiment shown can only be opened in the direction of an outlet channel.

Der Pumpenzylinder 3 bzw. die Pumpenkammer 6 ist nämlich durch einen napfförmigen, mit seiner offenen Seite lediglich durch Aufstecken auf den Pumpkolben 4 montierten Zylinderbehälter 7 gebildet, dessen Pumpenkammer 6 im montierten Zustand im wesentlichen vollständig mit dem auszutragenden Medium gefüllt ist. Der gegenüber der Pumpenkammer 6 verschließbare bzw. im Ausgangszustand verschlossene Auslaßkanal 8 führt von der Pumpenkammer 6 entlang des Pumpkolbens 4 bzw. durch diesen zu einer Auslaßdüse 9, die auf der von der Pumpenkammer 6 abgekehrten Seite des Pumpkolbens 4 vorgesehen und gegenüber diesem feststehend angeordnet ist. Die Auslaßdüse 9 kann z.B. als Zerstäuberdüse mit radialem bzw. tangentialem Eingang und axialem Ausgang ausgebildet sein.The pump cylinder 3 or the pump chamber 6 is in fact formed by a cup-shaped cylinder container 7, the open side of which is mounted only by pushing it onto the pumping piston 4, the pump chamber 6 of which, in the assembled state, is substantially completely filled with the medium to be discharged. The outlet channel 8, which can be closed with respect to the pump chamber 6 or closed in the initial state, leads from the pump chamber 6 along the pump piston 4 or through it to an outlet nozzle 9, which is provided on the side of the pump piston 4 facing away from the pump chamber 6 and is arranged fixedly opposite it . The outlet nozzle 9 can e.g. be designed as an atomizer nozzle with a radial or tangential inlet and an axial outlet.

Zwischen der Pumpenkammer 6 und der Auslaßdüse 9, nämlich im dargestellten Ausführungsbeispiel unmittelbar im Bereich des vorderen Endes des Pumpkolbens 4 ist der Auslaßkanal 8 mit einem Auslaßventil 10 verschließbar, das im wesentlichen aus zwei ineinandergreifenden Ventilteilen, nämlich einem einteilig mit dem Zylinderbehälter 7 ausgebildeten, innen liegenden Ventilkörper 11 mit Dichtlippe 12 und einem einteilig mit dem Pumpkolben 4 ausgebildeten Ventilsitz 13 besteht. Der Ventilsitz 13 liegt innerhalb des Pumpkolbens 4 bzw. eines einteilig an diesen anschließenden Kolbenschaftes 14, der etwa gleiche Außenquerschnitte wie der Pumpkolben 4 zwischen den Kolbenlippen 5 aufweist und annähernd bis zur Auslaßdüse 9 reicht bzw. in deren Bereich wenigstens einen Teil einer Dralleinrichtung zur Strömungsführung des der Auslaßdüse 9 zugeführten Mediums bildet und mehrfach länger als der Pumpkolben 4 sein kann.Between the pump chamber 6 and the outlet nozzle 9, namely in the illustrated embodiment directly in the region of the front end of the pump piston 4, the outlet channel 8 can be closed with an outlet valve 10, which essentially consists of two interlocking valve parts, namely a one-piece design with the cylinder container 7, inside lying valve body 11 with sealing lip 12 and a valve seat 13 formed in one piece with the pump piston 4. The valve seat 13 lies within the pump piston 4 or a piston shaft 14 connected in one piece to it, which has approximately the same external cross-sections as the pump piston 4 between the piston lips 5 and extends approximately to the outlet nozzle 9 or in the area thereof forms at least part of a swirl device for guiding the flow of the medium supplied to the outlet nozzle 9 and can be several times longer than the pump piston 4.

Der über seine Länge konstante Innenquerschnitte aufweisende Ventilsitz 13 ist wenigstens durch einen Längsabschnitt einer in dem Pumpkolben 4 und im Kolbenschaft 14 im wesentlichen in deren Mittelachse liegende Sacklochbohrung 15 gebildet, deren offenes Ende in der vorderen Stirnseite des Pumpkolbens 4 liegt und deren Länge mehrfach größer als ihr Durchmesser ist. Die Sacklochbohrung 15 weist über ihre gesamte Länge konstante Innenquerschnitte auf und bildet zweckmäßig auch im wesentlichen über ihre gesamte Länge den Ventilsitz 13. Unmittelbar benachbart zum Sacklochboden ist von der Sacklochbohrung 15 mindestens ein gegenüber dieser engerer, annähernd radialer Querkanal 16 zum Außenumfang des Kolbenschaftes 14 geführt. Im Umfangsbereich des Kolbenschaftes 14 ist mindestens eine an diesen Querkanal 16 mit ihrem zugehörigen Ende angeschlossene, im wesentlichen axiale Kanalnut 17 vorgesehen, die den Querkanal 16 mit der Austragdüse 9 bzw. der Dralleinrichtung verbindet. Im dargestellten Ausführungsbeispiel ist die einzige, an einen einzigen Querkanal 16 angeschlossene Kanalnut 17 im Außenumfang des Kolbenschaftes 14 vorgesehen und über ihre Länge an ihrer offenen Nutseite von einer Austraghülse 18 verschlossen, welche den Kolbenschaft 14 annähernd bis zum Pumpkolben 4 bzw. bis zur zugehörigen hintersten Kolbenlippe 5 und im wesentlichen über dessen gesamte Länge eng umgibt.The valve seat 13, which has constant internal cross sections over its length, is formed by at least one longitudinal section of a blind bore 15 lying in the pump piston 4 and in the piston shaft 14, essentially in the central axis thereof, the open end of which lies in the front end face of the pump piston 4 and whose length is several times greater than their diameter is. The blind hole 15 has constant internal cross sections over its entire length and expediently also forms the valve seat 13 essentially over its entire length. Immediately adjacent to the blind hole bottom, at least one narrower, approximately radial transverse channel 16 is guided to the outer circumference of the piston skirt 14 from the blind hole 15 . In the circumferential area of the piston skirt 14 there is at least one essentially axial channel groove 17 connected to this transverse channel 16 with its associated end, which connects the transverse channel 16 to the discharge nozzle 9 or the swirl device. In the exemplary embodiment shown, the only channel groove 17 connected to a single transverse channel 16 is provided in the outer circumference of the piston shaft 14 and is closed over its length on its open groove side by a discharge sleeve 18 which extends the piston shaft 14 approximately to the pump piston 4 or to the associated rearmost one Piston lip 5 and closely surrounds substantially over its entire length.

Die beispielsweise durch Pressung auf den Kolbenschaft 14 aufgesetzte Außenhülse 18, die mit einem in der Weite reduzierten Endabschnitt in den Pumpenzylinder 3 bzw. in den Zylinderbehälter 7 eingreifen kann, bildet mit ihrer vom Pumpkolben 4 entfernten und einteilig mit ihrem Mantel ausgebildeten Stirnwand unmittelbar die Austragdüse 9. Im dargestellten Ausführungsbeispiel liegen das Auslaßventil 10 und die Austragdüse 9 in der Pumpenachse 20.The outer sleeve 18, which is placed on the piston shaft 14, for example by pressing, and which can engage in the pump cylinder 3 or in the cylinder container 7 with an end section that is reduced in width, forms with its jacket, which is removed from the pump piston 4 and is formed in one piece with its jacket End wall directly the discharge nozzle 9. In the illustrated embodiment, the outlet valve 10 and the discharge nozzle 9 are in the pump axis 20.

Der Ventilkörper 11 könnte z.B. an dem den Ventilsitz 13 bildenden Bauteil bzw. am Pumpkolben 4 angeordnet bzw. gehaltert sein, wobei ggf. eine mit diesem Bauteil einteilige Ausbildung denkbar wäre. Im dargestellten Ausführungsbeispiel ist der Ventilkörper 11 jedoch mit einem gegenüber diesem Bauteil mit dem Pumphub simultan verschiebbaren Bauteil, nämlich dem Pumpenzylinder 3 bzw. dem Zylinderbehälter so verbunden, daß er dessen Pumphub-Bewegung gegenüber dem Ventilsitz 13 mit ausführt. Dadurch bildet der Ventilkörper 11 mit dem Ventilsitz 13 bzw. der Sacklochbohrung 15 eine weitere Pumpe in Form einer in Strömungsrichtung der Pumpenkammer 6 unmittelbar nachgeschalteten Schubkolbenpumpe, deren wirksame Querschnitte wesentlich kleiner als die der Pumpenkammer 6 sind. Diese weitere Pumpe wird beim Pumphub aus der Pumpenkammer 6 gefüllt und beschleunigt gleichzeitig das in sie eingebrachte Medium in Richtung zur Austragdüse 9, wobei der Ventilkörper 11 mit einem ihn tragenden Schaft 22 vor allem als Verdrängungskolben in der Sacklochbohrung 15 wirkt. Die Sacklochbohrung 15 ist zwischen dem Ventilkörper 11 und ihrem Boden im Querschnitt vollständig frei.The valve body 11 could e.g. be arranged or held on the component forming the valve seat 13 or on the pump piston 4, wherein a design which is in one piece with this component may be conceivable. In the illustrated embodiment, however, the valve body 11 is connected to a component which can be displaced simultaneously with the pump stroke, namely the pump cylinder 3 or the cylinder container, in such a way that it also carries out the pump stroke movement relative to the valve seat 13. As a result, the valve body 11 with the valve seat 13 or the blind bore 15 forms a further pump in the form of a thrust piston pump directly downstream in the flow direction of the pump chamber 6, the effective cross sections of which are substantially smaller than those of the pump chamber 6. This further pump is filled during the pumping stroke from the pump chamber 6 and at the same time accelerates the medium introduced into it in the direction of the discharge nozzle 9, the valve body 11 with a shaft 22 carrying it acting primarily as a displacement piston in the blind hole 15. The blind hole 15 is completely free in cross section between the valve body 11 and its bottom.

Der Ventilkörper 11 ist nach Art eines hohlen Hülsen- bzw. Ringkörpers ausgebildet, wofür er an seiner in Strömungsrichtung vorderen Stirnseite mit einer sacklochartigen Vertiefung 19 versehen ist, die zu ihrer offenen Stirnseite spitzwinklig erweitert ist und deren Axialerstreckung etwa in der Größenordnung ihrer größten Weite liegt. Dadurch ist die im Querschnitt ringförmige, im wesentlichen den gesamten Ventilkörper 11 bildende Dichtlippe 12 zu ihrer in Strömungsrichtung vorderen, ringförmigen Stirnfläche im Querschnitt zumindest geringfügig verjüngt, wobei diese Stirnfläche am Außenumfang die radial nach außen am weitesten vorstehende, ringförmige und im Querschnitt spitzwinklig begrenzte Dichtkante 21 bildet, die auch radial über den Außenumfang des Schaftes 22 geringfügig vorsteht. Der Schaft 22 weist im wesentlichen über seine gesamte bzw. wirksame Länge konstante Außenquerschnitte auf, die nur geringfügig kleiner als die Innenquerschnitte des Ventilsitzes 13 bzw. der Sacklochbohrung 15 sind, so daß der Ventilkörper 11 und der Schaft 22 mit dem Ventilsitz 13 einen spaltförmigen Ringkanal begrenzen können, dessen Querschnitt in der Größenordnung des Querkanales 16 liegen kann. Die Dichtlippe 12 bzw. die Dichtkante 21 ist so bemessen, daß sie im Ruhezustand mit federnder Vorspannung am Ventilsitz 13 anliegt und dadurch das Auslaßventil 10 geschlossen ist. Der Schaft 22 ist von eingreifenden Teilen frei und kann daher über seine Länge Vollquerschnitte aufweisen.The valve body 11 is designed in the manner of a hollow sleeve or ring body, for which it is provided on its front end face in the flow direction with a blind hole-like recess 19 which is widened at an acute angle to its open end face and whose axial extent is approximately in the order of magnitude of its greatest width . As a result, the sealing lip 12, which is ring-shaped in cross-section and essentially forms the entire valve body 11, is at least slightly tapered in cross-section with respect to its annular end face which is at the front in the direction of flow End face on the outer circumference forms the radially outward most protruding, annular sealing edge 21 with an acute angle in cross section, which also protrudes slightly radially beyond the outer circumference of the shaft 22. The shaft 22 has essentially constant outer cross sections over its entire or effective length, which are only slightly smaller than the inner cross sections of the valve seat 13 or the blind hole 15, so that the valve body 11 and the shaft 22 with the valve seat 13 form a gap-shaped annular channel limit, the cross section of which can be of the order of the transverse channel 16. The sealing lip 12 or the sealing edge 21 is dimensioned such that it rests on the valve seat 13 with a resilient bias in the idle state and the outlet valve 10 is thereby closed. The shaft 22 is free from engaging parts and can therefore have full cross sections over its length.

Des weiteren ist die im Querschnitt in Förderrichtung frei ausragende Dichtlippe 12 elastisch federnd so radial verengbar, daß ihr Außenumfang etwa gleiche Weite wie derjenige des Schaftes 22 aufweist oder demgegenüber sogar kleiner ist, so daß dann der genannte Ringkanal die Verbindung zwischen der Pumpenkammer 6 und dem Auslaßkanal 8 freigibt. Durch die beschriebene Ausbildung bildet der Ventilkörper 11 im Ruhezustand gleichzeitig einen Verschluß, dessen Schließkraft bei Überdruck im Auslaßkanal 8 zunimmt. Bei Unterdruck im Auslaßkanal 8 bzw. bei Überdruck in der Pumpenkammer 6 dagegen wird der Ventilkörper 11 in der genannten Weise druckabhängig schmaler bzw. enger.Furthermore, the sealing lip 12 projecting freely in cross-section in the conveying direction can be elastically resiliently so radially narrowed that its outer circumference is approximately the same width as that of the shaft 22 or, in contrast, is even smaller, so that the said annular channel then connects the pump chamber 6 and the Outlet channel 8 releases. Due to the design described, the valve body 11 forms a closure in the idle state, the closing force of which increases with excess pressure in the outlet channel 8. With negative pressure in the outlet channel 8 or with excess pressure in the pump chamber 6, on the other hand, the valve body 11 becomes narrower or narrower in the manner mentioned depending on the pressure.

Je nach Größe bzw. Länge des Pumpenzylinders 3 bzw. des Zylinderbehälters 7 könnte der Ventilkörper 11 bzw. der Schaft 22 mit etwa radial abstehenden Stegen gehaltert sein. Im dargestellten Ausführungsbeispiel ist jedoch der Ventilkörper 11 ausschließlich mit dem von ihm abgekehrten Ende des Schaftes 22 gehaltert, das einteilig an die Innenseite der Bodenwand 23 des Zylinderbehälters 7 anschließt, so daß der Schaft 22 im wesentlichen über die gesamte Länge der Pumpenkammer 6 reicht und abstandsfrei innerhalb dieser bzw. wie der Ventilkörper im wesentlichen zwischen den Enden des Zylinders oder der Pumpenkammer liegt. Der Ventilkörper 11 ragt frei in Richtung zum offenen bzw. austragseitigen Ende des Pumpenzylinders 3, ist jedoch gegenüber diesem Ende derart zurückversetzt, daß er bei eingesetztem und in Ausgangslage stehendem Pumpkolben 4 zwar bereits in den Ventilsitz 13 eingreift, jedoch unmittelbar benachbart zur vorderen Stirnfläche des Pumpkolbens 4 innerhalb diesem liegt. Dadurch trägt der Ventilkörper 11 zur Sicherung des Pumpenzylinders 3 gegenüber dem Pumpkolben 4 gegen quer zur Pumpenachse 20 wirkende Kräft bei. Der Zylinderbehälter 7 ist ausschließlich durch Aufstecken auf den Pumpkolben 4 montiert und lagegesichert und ansonsten gegenüber der übrigen Austragvorrichtung 1 insbesondere am Außenumfang ohne Abstützung. Dadurch läßt sich der Zylinderbehälter 7 nach Abziehen sehr leicht auswechseln.Depending on the size or length of the pump cylinder 3 or the cylinder container 7, the valve body 11 or the shaft 22 could be held with webs projecting approximately radially. In the illustrated embodiment, however, the valve body 11 is exclusively with the one facing away from it End of the shaft 22 is held, which integrally connects to the inside of the bottom wall 23 of the cylinder container 7, so that the shaft 22 extends substantially over the entire length of the pump chamber 6 and free of space within this or like the valve body essentially between the ends of the cylinder or the pump chamber. The valve body 11 protrudes freely towards the open or discharge end of the pump cylinder 3, but is set back relative to this end in such a way that it already engages in the valve seat 13 when the pump piston 4 is inserted and in its initial position, but directly adjacent to the front end face of the Pump piston 4 lies within this. As a result, the valve body 11 contributes to securing the pump cylinder 3 with respect to the pump piston 4 against forces acting transversely to the pump axis 20. The cylinder container 7 is mounted and secured only by being plugged onto the pumping piston 4 and is otherwise without support relative to the rest of the discharge device 1, in particular on the outer circumference. This makes it very easy to replace the cylinder container 7 after being removed.

Zur Betätigung der Austragvorrichtung 1 durch Fingerdruck ist einerseits dem Pumpenzylinder 3 und andererseits dem Pumpkolben 4 jeweils mindestens eine Handhabe zugeordnet. Die Handhabe 24 des Zylinderbehälters 3 ist durch dessen Bodenwand 23 gebildet, die an ihrer Außenseite eine entsprechend vertiefte Daumenkuhle bildet. Am gegenüberliegenden bzw. offenen Ende weist der Zylinderbehälter 7 einen nur über seinen Außenumfang vorstehenden Ringbund 25 auf, wobei der Pumpenzylinder 3 an diesem Ende ausschließlich durch den eingesteckten Pumpkolben 4 und nicht etwa zusätzlich durch einen Zylinderdeckel, eine Kappe oder dgl. verschlossen ist. Zum besseren Einführen des in der Ausgangslage vollständig innerhalb des Pumpenzylinders 3 liegenden Pumpkolbens 4 ist die Kolbenlaufbahn am Einsteckende geringfügig konisch erweitert. Der Pumpkolben 4 ist in seiner vorderen Endfläche mit einer annähernd kugelkalottenförmigen Vertiefung 26 versehen, die im wesentlichen bis an die vordere, kegelstumpfförmige Flanke der vordersten Kolbenlippe 5 anschließt, wobei die dadurch gebildete Querschnittsform im wesentlichen vollständig komplementär zur Querschnittsform der Innenfläche der Bodenwand 23 ist, gegen welche der Pumpkolben 4 mit seiner vorderen Endfläche bis zu einer engen, im wesentlichen spaltfreien Anlage verschiebbar ist. Dadurch kann die Pumpenkammer 6 praktisch auf ein volumenfreies Maß verengt und somit nahezu restlos entleert werden.To actuate the discharge device 1 by finger pressure, at least one handle is assigned to the pump cylinder 3 on the one hand and the pump piston 4 on the other hand. The handle 24 of the cylinder container 3 is formed by its bottom wall 23, which forms a correspondingly recessed thumb cavity on its outside. At the opposite or open end, the cylinder container 7 has an annular collar 25 which projects only over its outer circumference, the pump cylinder 3 at this end being closed exclusively by the inserted pump piston 4 and not, for example, additionally by a cylinder cover, a cap or the like. For better insertion of the pump piston 4 lying completely inside the pump cylinder 3 in the starting position, the piston raceway is widened slightly conically at the insertion end. The pump piston 4 is in his front end surface provided with an approximately spherical cap-shaped recess 26, which essentially adjoins the front, frusto-conical flank of the foremost piston lip 5, the cross-sectional shape formed thereby being essentially completely complementary to the cross-sectional shape of the inner surface of the bottom wall 23, against which the pump piston 4 is connected its front end surface can be moved to a narrow, essentially gap-free system. As a result, the pump chamber 6 can practically be narrowed to a volume-free dimension and thus be emptied almost completely.

Die Austragdüse 9 ist am Ende eines spitzwinklig kegelstumpfförmigen, im wesentlichen in der Pumpenachse 20 liegenden Austragstutzens 27 vorgesehen, dessen Außenumfang im wesentlichen durch eine Außenhülse 28 gebildet ist. Die von der vorderen Endwand der Austraghülse 18 ausgehende, mit dieser einteilig ausgebildete sowie die Austraghülse 18 im Abstand im wesentlichen auf deren gesamte Länge umgebende Außenhülse 28, deren hinteres Ende den Ringbund 25 des in Ausgangslage aufgesteckten Zylinderbehälters 7 umgibt, bildet mindestens eine weitere Handhabe 29. Zu diesem Zweck ist das hintere Ende der Außenhülse 28 einteilig mit einer Kappe 30 ausgebildet, die in Axialansicht langgestreckt, nämlich z.B. im wesentlichen flach-oval bzw. elliptisch ist.The discharge nozzle 9 is provided at the end of a discharge nozzle 27 which is frusto-conical and essentially lies in the pump axis 20, the outer circumference of which is essentially formed by an outer sleeve 28. The outer sleeve 28, starting from the front end wall of the discharge sleeve 18 and formed in one piece therewith and surrounding the discharge sleeve 18 at a distance essentially over its entire length, the rear end of which surrounds the annular collar 25 of the cylinder container 7 plugged in in the starting position, forms at least one further handle 29 For this purpose, the rear end of the outer sleeve 28 is formed in one piece with a cap 30 which is elongated in the axial view, namely, for example is essentially flat-oval or elliptical.

Die kleinere Querschnittserstreckung liegt etwa in der Größenordnung der zugehörigen Außenweite des hinteren Endes des Austragstutzens 27, während die größere Querschnittserstreckung demgegenüber mehrfach größer ist, so daß durch die entsprechende Kappenstirnwand 31 zwei beiderseits des Austragstutzens 27 an voneinander abgekehrten Seiten liegende Druck-Handhaben 29 gebildet sind. Deren Druckflächen liegen zweckmäßig zum Austragstutzen 27 unter einem kleinen Winkel abfallend so geneigt, daß sie in Richtung zu ihren äußeren Enden in der Axialentfernung von der Handhabe 24 zunehmen, so daß bei einhändiger Betätigung keine Gefahr besteht, daß die beiden, an den Handhaben 29 anliegenden Finger nach außen abrutschen können. Der, gleiche Form wie die Kappenstirnwand 31 aufweisende Kappenmantel 32 liegt in sämtlichen Querschnitten im wesentlichen parallel zur Pumpenachse 20 und ragt entgegen der Austragdüse 9 unverschlossen auf voller Weite frei so weit aus, daß er verhältnismäßig weit über den in Ausgangslage befindlichen Zylinderbehälter 7 vorsteht. An einer oder beiden Längsseiten ist der Kappenmantel 32 mit einem von seiner hinteren Stirnkante ausgehenden und etwa bis in den Bereich der vorderen Endfläche des Pumpkolbens 4 reichenden Daumeneingriffs-Ausschnitt 33 versehen, der ebenso wie diese Endfläche einen geringen Abstand von der Stirnwand 31 aufweist.The smaller cross-sectional extent is approximately in the order of magnitude of the associated outer width of the rear end of the discharge nozzle 27, while the larger cross-sectional extension is several times larger, so that two pressure handles 29 lying on opposite sides of each other are formed by the corresponding cap end wall 31 . Their pressure surfaces are expediently inclined to the discharge nozzle 27 at a small angle so that they are towards them increase the outer ends in the axial distance from the handle 24, so that with one-handed actuation there is no danger that the two fingers resting on the handles 29 can slip outwards. The same shape as the cap end wall 31 has the cap jacket 32 in all cross sections substantially parallel to the pump axis 20 and protrudes against the discharge nozzle 9 freely over the full width so far that it protrudes relatively far beyond the cylinder container 7 in the starting position. On one or both long sides, the cap jacket 32 is provided with a thumb-engaging cutout 33 which extends from its rear end edge and extends approximately to the region of the front end surface of the pump piston 4 and which, like this end surface, is at a short distance from the end wall 31.

Für den Betrieb wird die gefüllte, in Ausgangslage stehende Austragvorrichtung 1 mit einer Hand gegriffen und der Zylinderbehälter 7 weiter auf den Kolbenschaft 14 geschoben. Sobald dadurch in der Pumpenkammer 6 ein entsprechend hoher Druck aufgebaut ist, wird der Ventilkörper 11 gemäß Fig. 3 zusammengedrückt, so daß das Medium aus der Pumpenkammer 6 durch den Ringkanal in die Sacklochbohrung 15 gelangen kann. Gleichzeitig verschiebt sich der Ventilkörper 11 innerhalb der Sacklochbohrung 15 in Austragrichtung, so daß das Kammervolumen der zylinderartigen Sacklochbohrung 15 ebenfalls reduziert und dadurch das Medium auch aus dieser sich nach Art einer Pumpenkammer verengenden Bohrung verdrängt wird. Gegen Ende dieser Bewegung bzw. beim Endanschlag des Pumpkolbens 4 an der Bodenwand 23 steht die vordere, freie Stirnfläche des Ventilkörpers 11 im Bereich der dem Pumpkolben 4 zugekehrten Begrenzung des Querkanales 16, so daß in der Sacklochbohrung 15 nur noch ein sehr kleines, unverdrängtes Restvolumen bleibt. Durch entsprechende Gestaltung des Querkanales und der Endlage des Ventilkörpers kann auch dieses Restvolumen auf einen Wert gegen Null verringert werden. Zum vereinfachten Einführen des Ventilkörpers 11 in die Sacklochbohrung 15 ist deren vorderes Ende geringfügig konisch erweitert, wobei es an die Vertiefung 26 anschließt.For operation, the filled discharge device 1, which is in the initial position, is gripped with one hand and the cylinder container 7 is pushed further onto the piston shaft 14. As soon as a correspondingly high pressure is built up in the pump chamber 6 as a result, the valve body 11 is compressed according to FIG. 3, so that the medium from the pump chamber 6 can pass through the annular channel into the blind hole 15. At the same time, the valve body 11 moves within the blind bore 15 in the discharge direction, so that the chamber volume of the cylindrical blind bore 15 is also reduced and the medium is also displaced from this bore, which narrows like a pump chamber. Towards the end of this movement or at the end stop of the pump piston 4 on the bottom wall 23, the front, free end face of the valve body 11 is in the region of the boundary of the transverse channel 16 facing the pump piston 4, so that only a very small, undisplaced residual volume is left in the blind hole 15 remains. By appropriately designing the transverse channel and the end position of the valve body, this residual volume can also be reduced to a value towards zero will. To simplify the insertion of the valve body 11 into the blind hole 15, the front end thereof is widened slightly conically, it connecting to the recess 26.

Durch die beschriebene Ausbildung kann die Austragvorrichtung einschließlich mindestens eines Ventiles ohne jegliche Verwendung metallischer Teile aus einer sehr geringen Anzahl von Kunststoffteilen hergestellt werden, wobei sogar zwei hintereinander geschaltete Pumpen gebildet sein können. Im Falle der Ausbildung als wiederansaugende Austragpumpe wäre der Boden des Zylinderbehälters 7 mit einer entsprechenden Ansaug- bzw. Einlaßöffnung für den Anschluß an einen Speicherbehälter zu versehen, wobei diesem Einlaß dann ein Ventil der erfindungsgemäßen Art als Einlaßventil zuzuordnen wäre. Der Ventilkörper dieses Einlaßventiles könnte in einem durch den Zylinderbehälter gebildeten Ventilsitz hinsichtlich der Störmungsrichtung in gleicher Ausrichtung wie der Ventilkörper 11 des Auslaßventiles liegen und ggf. ebenfalls einteilig mit dem Zylinderbehälter ausgebildet sein, wobei in diesem Fall der Ventilkörper gegenüber dem Ventilsitz nicht verschiebbar angeordnet zu sein braucht.As a result of the design described, the discharge device including at least one valve can be produced from a very small number of plastic parts without any use of metallic parts, it even being possible to form two pumps connected in series. In the case of training as a re-suction discharge pump, the bottom of the cylinder container 7 would have to be provided with a corresponding suction or inlet opening for connection to a storage tank, this inlet then being assigned a valve of the type according to the invention as an inlet valve. The valve body of this inlet valve could be in the same direction as the valve body 11 of the exhaust valve in a valve seat formed by the cylinder container with respect to the direction of the fault and possibly also be formed in one piece with the cylinder container, in which case the valve body cannot be arranged displaceably with respect to the valve seat needs.

Die erfindungsgemäße Ausbildung eignet sich insbesondere für extrem kleine Austragvorrichtungen mit einem Kolbendurchmesser in der Größenordnung zwischen 3 und 15 mm, insbesondere in der Größenordnung von etwa 5 mm. Der Ventilkörper 11 kann eine Weite in der Größenordnung von weniger als 1 mm bis mehr als 5 mm, insbesondere in der Größenordnung von etwa 1,5 bis 2 mm aufweisen. Seine Länge kann demgegenüber etwa um ein Drittel kleiner sein, während die Schaftlänge mehrfach größer als die Länge des Ventilkörpers bzw. der Schaftdurchmesser ist.The design according to the invention is particularly suitable for extremely small discharge devices with a piston diameter of the order of between 3 and 15 mm, in particular of the order of about 5 mm. The valve body 11 can have a width in the order of less than 1 mm to more than 5 mm, in particular in the order of about 1.5 to 2 mm. In contrast, its length can be approximately one third smaller, while the stem length is several times greater than the length of the valve body or the stem diameter.

In den Figuren 4 bis 7 sind für einander entsprechende Teile die gleichen Bezugszeichen wie in den Figuren 1 bis 3, jedoch mit unterschiedlichen Buchstabenindizes verwendet, weshalb entsprechende Beschreibungsteile für alle Figuren gelten.In FIGS. 4 to 7, the same reference numerals are used for corresponding parts as in FIGS. 1 to 3, but with different letter indices, which is why corresponding description parts apply to all the figures.

In den Figuren 4 und 5 ist eine Ausführungsform dargestellt, bei welcher das Ventil entweder ausschließlich oder zumindest teilweise wegabhängig öffnet, so daß für das Öffnen des Auslaßventiles nicht unbedingt eine elastische Formveränderung des Ventilkörpers erforderlich ist. Der nicht näher dargestellte Ventilkörper ist zweckmäßig gleich wie bei der Ausführungsform nach den Figuren 1 bis 3 ausgebildet.FIGS. 4 and 5 show an embodiment in which the valve opens either exclusively or at least partially depending on the path, so that an elastic change in the shape of the valve body is not absolutely necessary for opening the exhaust valve. The valve body, not shown, is expediently designed the same as in the embodiment according to FIGS.

In der den Ventilsitz 13a bildenden Bohrungswandung der Sacklochbohrung 15a sind mehrere, insbesondere drei gleichmäßig über den Umfang verteilte Längsprofilierungen 34 in Form flacher Längsnuten vorgesehen, deren Breite wesentlich, z.B. fünf- bis zehnfach größer als ihre Tiefe sein kann, die zweckmäßig nur Bruchteile eines Millimeters, nämlich z.B. nur etwa einen Zehntel Millimeter beträgt, so daß die Dichtlippe des Ventilkörpers unter ihrer radial nach außen gerichteten Vorspannung zumindest teilweise in die jeweilige Längsprofilierung eintreten und diese ggf. in zwei annähernd gesonderte Übertrittsöffnungen unterteilen kann. Die dem offenen Ende der Sacklochbohrung 15a zugehörigen Enden der Längsprofilierungen 34 liegen in einem Abstand von dem gemäß Fig. 1 in Ausgangsstellung stehenden Ventilkörper, für den an diesem Ende des Ventilsitzes ein von Längsprofilierungen freier Abschnitt gebildet ist, so daß er in Ausgangsstellung völlig dicht anliegt. Auf einem ersten Anfangsabschnitt 35 steigen die Längsprofilierungen 34 unter einem sehr flachen Winkel in der Tiefe auf ihre genannte Maximaltiefe allmählich an, wobei die Länge dieses Anfangsabschnittes 35 etwa einem Drittel bis einem Viertel der Gesamtlänge der Längsprofilierungen 34 entsprechen kann.In the bore wall of the blind bore 15a forming the valve seat 13a, several, in particular three, longitudinal profiles 34 distributed uniformly over the circumference are provided in the form of flat longitudinal grooves, the width of which can be substantially, for example five to ten times greater than their depth, which expediently only a fraction of a millimeter , namely, for example, is only about a tenth of a millimeter, so that the sealing lip of the valve body, under its radially outward bias, at least partially enters the respective longitudinal profile and can, if necessary, divide this into two approximately separate transition openings. The ends of the longitudinal profiles 34 belonging to the open end of the blind bore 15a are at a distance from the valve body in the initial position according to FIG. 1, for which a section free of longitudinal profiles is formed at this end of the valve seat, so that it lies completely tight in the initial position . On a first initial section 35, the longitudinal profiles 34 gradually increase in depth at a very shallow angle to their maximum depth, the length of which Initial section 35 can correspond to about a third to a quarter of the total length of the longitudinal profiles 34.

Wird die Austragpumpe 2 in der beschriebenen Weise betätigt, so gelangt der Ventilkörper zunächst in den Bereich der Anfangsabschnitte 35 und dann in die Bereiche konstanter Tiefe der Längsprofilierungen 34, so daß bereits bei sehr geringem, für eine elastische Formveränderung des Ventilkörpers nicht ausreichenden Druck Medium zwischen der Dichtlippe des Ventilkörpers und dem Ventilsitz nach Art eines wegabhängig schiebergesteuerten Ventiles zur Auslaßöffnung strömen kann. Wird der Druck durch entsprechend kräftige Betätigung der Austragpumpe ausreichend stark erhöht, so führt er zusätzlich zu einer die Durchlaßquerschnitte erweiternden elastischen Formveränderung des Ventilkörpers. Die pro Zeiteinheit ausgebrachte Medienmenge kann dadurch feinverändert werden. Die Längsprofilierungen 34 reichen bis zur Querbohrung 16a, so daß sich bis zum Sacklochboden nochmals ein von Längsprofilierungen freier Abschnitt des Ventilsitzes anschließt, der nur von der Querbohrung 16a durchsetzt ist.If the discharge pump 2 is actuated in the manner described, the valve body first reaches the area of the initial sections 35 and then the areas of constant depth of the longitudinal profiles 34, so that even at a very low pressure medium which is insufficient for an elastic shape change of the valve body the sealing lip of the valve body and the valve seat can flow to the outlet opening in the manner of a path-dependent slide-controlled valve. If the pressure is increased sufficiently strongly by correspondingly strong actuation of the discharge pump, it additionally leads to an elastic change in shape of the valve body which widens the passage cross sections. The amount of media applied per unit of time can be fine-tuned. The longitudinal profiles 34 extend to the transverse bore 16a, so that a section of the valve seat free of longitudinal profiles, which is only penetrated by the transverse bore 16a, is connected to the bottom of the blind hole.

Bei der Ausführungsform nach den Figuren 6 und 7 sind die Längsprofilierungen 34b durch im Querschnitt winklig begrenzte Längsrippen gebildet, die eine scharfe Rippenkante und im spitzen Winkel zueinander liegende Rippenflanken aufweisen sowie jeweils etwa symmetrisch zu einer Axialebene des Ventilsitzes 13b ausgebildet sind. Diese Längsprofilierungen 34b drücken, sobald der Ventilkörper auf sie aufläuft dessen Dichtlippe kerbenartig ein, so daß beiderseits der jeweiligen Längsprofilierung eine enge Übertrittsöffnung für das Medium geschaffen wird, welche durch entsprechende Druckerhöhung und sich daraus ergebende Formveränderung des Ventilkörpers vergrößert werden kann. Die Längsprofilierungen 34b reichen bis in denjenigen gesamten Längsabschnitt des Ventilsitzes 13b, in welchem dieser von der Querbohrung 16b durchsetzt wird, nämlich annähernd bis zum Boden der Sacklochbohrung 15b.In the embodiment according to FIGS. 6 and 7, the longitudinal profiles 34b are formed by longitudinal ribs which are angularly limited in cross section, which have a sharp rib edge and rib flanks lying at an acute angle to one another and are each approximately symmetrical to an axial plane of the valve seat 13b. These longitudinal profiles 34b press, as soon as the valve body runs onto it, its sealing lip notches-like, so that a narrow transition opening for the medium is created on both sides of the respective longitudinal profile, which can be enlarged by a corresponding increase in pressure and the resulting change in shape of the valve body. The longitudinal profiles 34b extend all the way to that Longitudinal section of the valve seat 13b, in which the transverse bore 16b passes through it, namely approximately to the bottom of the blind bore 15b.

Claims (12)

  1. A device for discharging a fluid comprising at least one discharge pump (2) including pump parts (4, 7) movable with respect to each other for manual actuation and at least one valve (10), such as an outlet valve, actuatable by pressure and an internally located valve housing (11) and a valve seat (13) of which at least one is configured to change shape when subjected to said pressure and which is deformable by overpressure of a fluid determining a difference in pressure, characterized in that each said valve housing (11) and said valve seat (13) is arranged on one of said pump parts (4, 7) movable with respect to each other.
  2. The device as set forth in claim 1, characterized in that a pump chamber (6) is connected, with interposition of said valve (10) opening when subjected to said difference in pressure in said pump chamber (6), in particular to an outlet passage (8), preferably at least one valve housing (11) of at least one valve (10) being configured as a constricting valve housing when exposed to radial pressure or overpressure.
  3. The device as set forth in claim 1 or 2, characterized in that at least one valve (10) is configured as a lipped valve having at least one annular elastic sealing lip (12) and a peripheral surface assigned thereto as a valve seat (13), preferably said valve housing (11) comprising a sole sealing lip (12) and/or a valve bore forming a section of at least one outlet passage (8) being provided as a valve seat (13).
  4. The device as set forth in any of the preceding claims, characterized in that said valve seat (13) and said valve housing (11) of at least one valve (10) are connected to said pump parts shiftably with respect to each other over the travel of a pump stroke and said valve seat (13) extending in the form of a blind hole (15) or the like over a length substantially corresponding to said stroke travel, in that preferably said valve housing (11) and/or said valve seat (13) of at least one valve (10) is configured integral with the associated pump part in each case and in that preferably said discharge pump (2) is configured as a plunger pump having a pump cylinder (3) and a plunger (4) manually shiftable therein, said valve housing (11) being disposed on said pump cylinder (3), in particular protruding by its body (22) from a face of said pump chamber (6) opposing said plunger (4).
  5. The device as set forth in any of the preceding claims, characterized in that the valve housing (11) of at least one valve (10) is provided at the end of the body (22) located in particular roughly in the same axis as that of an associated valve seat (13) or is formed by a flared integral end of said body (22) freely protruding in the discharge direction and in that preferably said valve housing (11) of at least one outlet valve (10) is configured annular in cross-section or dished in axial section, particularly said end of body (22) translating into a shell section flared acutely in the form of a truncated cone.
  6. The device as set forth in any of the preceding claims, characterized in that the valve housing (11) of at least one valve in the open position and particularly said body (22) with said valve seat (13) and said valve bore respectively define an annular cross-section section of the associated passage, said valve housing (11) preferably being located in each position within said valve bore.
  7. The device as set forth in any of the preceding claims, characterized in that a pump part defining a pump chamber (6) of said discharge pump (2) at the outer periphery is configured inserted shiftably on a further pump part, particularly as a dished cylinder vessel (7) closed at the bottom, on the bottom wall (23) of which at least one valve housing (11) of at least one valve adjoins, said valve housing (11) being located substantially on the same axis within said pump cylinder (3), the face of a pump chamber (6) opposing a plunger (4) of said discharge pump (2) and the associated face of said plunger (4) being preferably configured complementary for engaging each other substantially - gapless or said face being barreled to project at least partly into said pump chamber (6).
  8. The device as set forth in any of the preceding claims, characterized in that a plunger (4) of said discharge pump comprises at least one plunger lip (5) configured in particular integrally therewith and is configured integrally with a plunger body (14) receiving a valve seat (13) of at least one valve.
  9. The device as set forth in any of the preceding claims, characterized in that an outlet passage (8) is provided in the discharge direction downstream of said valve seat (13) of at least one valve configured as an outlet valve (10) between peripheral surfaces and is connected preferably to said valve seat (13) via at least one transverse passage (16) located directly adjacent to the end of said blind hole (15), particularly said plunger body (14) being inserted in a discharge sleeve (18) forming a discharge nozzle (9) at the end.
  10. The device as set forth in any of the preceding claims, characterized in that two discharge pumps are provided particularly arranged directly in series, of which preferably the plunger of the pump located downstream is formed by the valve housing (11) of an outlet valve (10).
  11. The device as set forth in any of the preceding claims, characterized in that at least one valve (10a, 10b) is configured at least in part as opening as a function of travel or as a kind of spool valve, that particularly the valve bore provided as a valve seat (13a and 13b respectively) comprises on a partial section of its length, adjoining the starting position of said valve housing, at least one longitudinal profile configuration (34 and 34b respectively), such as a longitudinal groove, a longitudinal rib or the like and that preferably the height of said profile of at least one longitudinal profile configuration (34 and 34b respectively) increased inclined at a starting section (35) and/or that the longitudinal profile configuration (34 and 34b respectively) assigned particularly to a sealing lip of the valve housing extends at least up to said transverse hole (16a and 16b respectively).
  12. The device as set forth in any of the preceding claims, characterized in that at least one plunger (4) of at least one discharge pump (2) is connected to a handle (29) configured in particular integrally with said discharge sleeve (18), said discharge device (1) consisting preferably of not more than three separate components, including at least one valve.
EP90103388A 1989-03-18 1990-02-22 Device for discharging a fluid Expired - Lifetime EP0388651B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3909031 1989-03-18
DE3909031A DE3909031A1 (en) 1989-03-18 1989-03-18 DISCHARGE DEVICE FOR MEDIA

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EP0388651A2 EP0388651A2 (en) 1990-09-26
EP0388651A3 EP0388651A3 (en) 1991-05-29
EP0388651B1 true EP0388651B1 (en) 1996-08-14

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AT (1) ATE141191T1 (en)
DE (2) DE3909031A1 (en)

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DE4005528C2 (en) * 1990-02-22 1998-01-15 Pfeiffer Erich Gmbh & Co Kg Discharge device for media
IT1244803B (en) * 1990-11-21 1994-09-05 Promo Pack S A SINGLE-DOSE DISPENSER-SPRAYER FOR ENDONASAL ADMINISTRATION OF LIQUID MEDICATIONS.
FR2678906B1 (en) * 1991-07-10 1993-10-22 Valois DEVICE FOR PROJECTING A PREDETERMINED DOSE OF A FLUID PRODUCT, AND ITS FILLING METHOD.
EP0591365B1 (en) * 1991-06-26 1995-12-20 Valois S.A. Device for dispensing a predetermined dose of fluid product, and method of filling thereof
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Also Published As

Publication number Publication date
DE3909031A1 (en) 1990-09-27
EP0388651A2 (en) 1990-09-26
EP0388651A3 (en) 1991-05-29
ATE141191T1 (en) 1996-08-15
DE59010441D1 (en) 1996-09-19

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