EP1616630A2 - Distributeur de produit fluide - Google Patents

Distributeur de produit fluide Download PDF

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Publication number
EP1616630A2
EP1616630A2 EP05014621A EP05014621A EP1616630A2 EP 1616630 A2 EP1616630 A2 EP 1616630A2 EP 05014621 A EP05014621 A EP 05014621A EP 05014621 A EP05014621 A EP 05014621A EP 1616630 A2 EP1616630 A2 EP 1616630A2
Authority
EP
European Patent Office
Prior art keywords
finger rest
applicator
driver
end position
metering chamber
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
EP05014621A
Other languages
German (de)
English (en)
Other versions
EP1616630A3 (fr
EP1616630B1 (fr
Inventor
Jürgen Greiner-Perth
Peter König
Stefan Ritsche
Miro Carter
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 EP1616630A2 publication Critical patent/EP1616630A2/fr
Publication of EP1616630A3 publication Critical patent/EP1616630A3/fr
Application granted granted Critical
Publication of EP1616630B1 publication Critical patent/EP1616630B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B05B11/1015—Piston pumps actuated without substantial movement of the nozzle in the direction of the pressure stroke
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/109—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle the dispensing stroke being affected by the stored energy of a spring
    • B05B11/1092—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle the dispensing stroke being affected by the stored energy of a spring automatically released from a loaded state at the end of the loading stroke
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B05B11/1016—Piston pumps the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element

Definitions

  • the invention relates to a dispenser for media with a media container, an applicator with at least one discharge opening, a manually kraftbeaufschlagbaren finger rest and a pump with at least two relatively axially movable pump parts.
  • dispensers are mainly used for liquids, suspensions, pastes and foams and serve for the metered discharge of these media.
  • dispensers are used, inter alia, for nasal applications in which the applicator is designed such that it can be introduced into the nose in order to introduce liquids or suspensions there.
  • the problem underlying the invention is therefore to provide a dispenser for media of the type mentioned above, which allows a more convenient than the prior art applicability.
  • the applicator is firmly connected to the media container and the finger rest is axially movable to the media container and the applicator between a first unpressed Whyungsendposition and a second depressed Whyungsendposition.
  • the applicator and the media container form a one-piece unit during use, thereby causing the discharge opening to be in a fixed and unchangeable position relative to the media container.
  • the media container serves to receive at least one medium.
  • a position of the media container that is stationary relative to the affected body part during use therefore also leads to a fixed position of the discharge.
  • the dispensing orifice of the applicator remains at its position prior to commencement of the dispensing procedure by insertion of the applicator into the nose.
  • the finger rest is translationally relatively movable to this one-piece unit of media container and applicator.
  • the main axis of this translational mobility is preferably identical to a longitudinal axis of the applicator.
  • the applicator and the media container may be provided as a one-piece component, but are preferably separate components that are releasably connected to each other, for example by a screw connection.
  • a connecting element for connecting the applicator to the media container in particular a screw cap, is provided.
  • the pump is preferably disposed within the applicator and has a metering chamber which is at least partially delimited by the applicator.
  • the volume of the metering chamber is determined by a pump piston, which is operatively connected to the finger rest, with both a direct connection between the piston and finger rest as well as an operative connection via intermediate elements may be appropriate.
  • the filling of the metering chamber with medium originating from the media container can take place in the course of pressing the finger rest or when returning the finger rest to its starting position. The same applies to the discharge of the medium located in the metering chamber.
  • the pump is designed such that a constant discharge stroke can be achieved independently of a manual operating force.
  • the discharge of the medium located in the metering chamber is not by the Characteristic of the operation influenced.
  • This is preferably achieved in that the finger rest and a pump piston of the pump are not integrally connected to each other and are kinematically separated from each other.
  • An actuation of the finger rest does not directly result in a reduction of the volume of the metering chamber of the pump.
  • the applied energy is stored and used at a later time to compress the medium in the dosing chamber, for example after reaching a certain operating position.
  • this independence from the type of operation by the user is expedient.
  • a driver which is permanently connected to a pump piston, wherein the applicator, the driver and / or the finger rest coupling means, for establishing an axial coupling state between the driver and the finger rest in the region of a first , the pump stroke end position assigned to the first operating end position and for producing a decoupled state of driver and finger rest in the region of a second stroke end position associated with the second operating end position, and wherein the driver is subjected to a force of force in the direction of the first stroke end position by a spring force.
  • the driver which is permanently connected to the pump piston, directly determines the volume of the metering chamber. It is relatively movable both to the applicator and the finger rest in the direction of the main axis. In the first stroke end position of its movement relative to the applicator, the metering chamber of the pump has a minimal volume. In its second stroke end position, the metering chamber has a maximum volume. By the application of force to the driver, the latter is pressed in the direction of its first stroke end position, that is to say the end position with a minimum metering chamber volume. The opposite direction of the driver in the direction of the second stroke end position is achieved by a coupling of the driver movement with the operating movement of the finger rest.
  • the coupling means provided for this purpose are designed so that they cause a coupling between the finger rest and the driver in the region of the first stroke end position or the first operating end position, so that during the maintenance of this coupling state in the operation of the driver against the Federkraftbeetzschlagung is tightened, and that They solve this coupling when reaching the stroke end position, so that the thus biased driver is transferred by the spring force back into the first stroke end position. Due to the movement of the driver from the second stroke end position back into the first stroke end position, the volume of the metering chamber is reduced and a Austragsvorgang conditional. For this discharge process, it is not significant that the finger rest is meanwhile guided back to its first operating end position. This can also be done after completion of the discharge process. Once the finger rest has reached the first advocatesungsendposition again, the coupling between the driver and finger rest - preferably automatically - restored.
  • the coupling means to a delay means by the decoupling of the driver of the finger rest in the region of the second stroke end position, a slowed return stroke movement is achieved.
  • a slowed return stroke movement is understood to mean a return stroke movement which is slowed down with respect to a return stroke movement dependent only on the spring force and the pressure in the metering chamber with respect to its time course. Such a slowdown may be particularly useful when a certain characteristic of the discharge is to be achieved or a filling process of the metering chamber should not be prematurely interrupted by the return stroke of the piston in the direction of the first stroke end position.
  • the delay means may be designed such that they develop a deceleration effect only in a partial region of the stroke, in particular in a subregion adjoining the second stroke end position.
  • a possible realization of the delay means provides guide elements, which cause a superposition of the lifting movement with a rotational movement about a pump longitudinal axis during the return stroke of the driver.
  • the coupling means on the driver at least one locking element, preferably at least one locking lug which is coupled to the finger rest such that movement of the finger rest from the first Whyungsendposition to the second Whyungsendposition a movement of the driver from the first pump stroke end position to the second pump stroke end position causes, and a decoupling, which decouples the locking means of the finger rest in the region of the stroke end position, preferably by radially deflecting the locking lug.
  • Embodiments of the dispenser according to this development are structurally very simple.
  • the detent element provided on the catch preferably extends radially outward into the area of the finger rest, so that in the course of pressing the finger rest it engages with the latter in a manner which permits joint movement of the finger rest and the entrainment member in the direction of the second operating end position.
  • Particularly preferred is the use of an elastically formed latching lug as a latching element. This is deflected radially enough when reaching the second advocatesungsendposition that it is no longer in engagement with the finger rest and As a result, the biased in this state by the spring force driver is pressed in the direction of its first stroke end position.
  • the deflected latching nose slides on an inwardly facing contact surface of the finger rest.
  • the finger rest and the latch are designed so that the spring force opposing frictional force is low by the contact of the latch with this area.
  • the finger pad preferably spring assisted, can be returned to the first Sacheungsendposition in which the latch of the driver gets back into the undeflected engagement position with the finger rest.
  • the elastic locking element may also be provided on the finger support side and be deflected radially outward in the region of a stroke end position by an applicator-side decoupling device.
  • the applicator and the finger rest are rotationally fixed to each other with respect to a main axis and the driver is secured in a first, adjacent to the first stroke end guide portion at least in a rotational direction about the main axis against rotation relative to the applicator and in a second Triggering section adjacent to the second stroke end position is rotatable in this direction of rotation, wherein guide means are provided which, after reaching the state decoupled from the finger rest, guide the entrainment back into the first stroke end position in a superimposed rotational and translational movement.
  • the guide means are formed by sawtooth-shaped projections which extend on the applicator inner wall in a circle around the longitudinal axis of the applicator.
  • the teeth are separated from one another by longitudinally aligned grooves on the inner wall of the applicator.
  • the grooves are used in the guide portion of the hub to prevent rotation of the driver by means of Mitauer worker coupling sections. If necessary, they can also be used in the same way for rotation of finger support side coupling sections beyond.
  • the coupling portions of the driver and the finger rest have mutually facing beveled coupling surfaces whose pitch preferably corresponds to that of the saw teeth.
  • the coupling surfaces lie flush against each other. Due to the oblique design of the coupling surfaces acts on a torque on the driver, which does not lead to a rotation of the driver due to the leadership of the coupling portions in the grooves between the saw teeth or because of the longitudinally aligned vertical edges of the saw teeth. After reaching the tip of the saw teeth but the Mit videseit coupling section then slides on the finger support side coupling surface and the oblique edge of the saw teeth, so that it is a combined Translational and rotational movement of the driver comes.
  • the cam-side coupling portion again engages with the finger rest-side coupling portion.
  • the advantage of this development according to the invention is on the one hand that it represents a delay means of the type described above, thus slowing the return stroke of the driver and the piston, which is particularly useful in a time-critical upstream filling of the dosing, and that on the other hand with respect to a variant of the coupling means Locking elements no elastic components needed and deformed in the course of operation. This avoids failure of the dispenser due to damage to elastically deflected components.
  • the pump piston fixedly connected to the driver together with a cylindrical pump wall and an end-side end wall of the applicator delimits a dosing chamber of the pump.
  • a connecting line to the media container is provided, wherein this supply line can be opened and closed depending on the stroke position of the piston and / or the pressure in the metering chamber.
  • the pump is also connected to the discharge opening by a connecting line and optionally further, the discharge process influencing elements.
  • the driver is connected by an inlet valve with the media container, which opens at a lower compared to the pressure in the media container Dosierhuntdruck. Such a valve prevents the outflow of medium into the media container during actuation of the dispenser.
  • the driver and / or the applicator are designed such that the dosing chamber is separated from the media container in a first separating stroke section adjoining the first stroke end position and is connected to the media container in an adjoining connecting stroke section.
  • the piston During the movement of the piston from the second stroke end position into the first stroke end position, that is to say during the reduction of the volume of the metering chamber, the piston returns to the separating stroke section in which it is separated from the media container. From the time of separation no medium can get back into the medium tank. As a result, the amount of media present in the metering chamber at the time of transition from the connecting stroke portion to the separating stroke portion is used for the subsequent discharge operation.
  • the metering chamber is separated from the media container in a second separating stroke section located upstream of the stroke end position.
  • the dispenser has a discharge valve, which is mechanically operatively connected to the finger rest and designed such that it opens in a Hub formatlage before or when reaching the second Hubendlage.
  • Such a discharge valve allows a targeted discharge of the medium after reaching an optimum for discharging pressure.
  • a discharge valve which is opened in dependence on a discharge pressure
  • a mechanically operatively connected to the finger support discharge valve is opened upon reaching a certain position of the finger rest.
  • a discharge valve can be opened even if a desired target pressure has not been reached.
  • a discharge valve of this type allows for use with dispensers of various types or purposes having a different discharge pressure.
  • a pressure chamber is provided between the metering chamber and the discharge opening, which is separated from the metering chamber by a pressure-operated intermediate valve.
  • the path of the medium from the media container passes through the metering chamber into the pressure chamber. From the pressure chamber, the medium is then discharged.
  • the metering chamber is preferably formed in such a structure that its minimum volume is very low relative to the maximum volume. As a result, very high pressures can be generated in the metering chamber, which cause a transport of the medium into the pressure chamber. From this, the medium can escape only discharge opening side. Without media discharge, the pressure in the pressure chamber thus continues to increase with each pump stroke until a desired discharge pressure is reached.
  • Such a device eliminates the risk that air is compressed within a metering chamber with each pump stroke and relaxed again during the return stroke, without causing the discharge of the medium. In such a case, the commissioning of the dispenser is virtually impossible because the pressure conditions in the metering chamber are identical for each pump stroke, without that an increasing pressure - as in this development in the pressure chamber - builds up.
  • the discharge valve is designed such that it maintains the open state in the opened state from a discharge pressure limit of the medium, this limit pressure is preferably lower than the opening limit pressure required for opening the valve at a discharge valve actuated by the pressure of the medium ,
  • valve remains open even at a discharge pressure that is insufficient to open the valve.
  • a valve which can be opened mechanically and not by pressure it is expedient to provide such a design. It achieves that the mechanical force by which the valve is opened need not be maintained for the period of discharge. When this mechanical force is applied directly by means of the finger rest of the dispenser, the use of a Such discharge valve to the fact that premature release of the finger rest does not result in a termination of the discharge.
  • the valve has an actuating surface, the pressurized portion is greater in the open state of the valve than in the closed state of the valve.
  • the pressurized portion in the closed state of the valve can also be so small that opening of the valve is not achieved on the basis of pressure, but instead can only be realized mechanically when the operating pressures are normal in the dispenser.
  • this pressurized portion is larger, so that maintaining the open state is achieved until the discharge pressure has dropped so far that, despite the increased actuation portion closing of the valve - for example by a spring force - is performed. This in turn is accompanied by a reduction of the actuating surface.
  • FIGS. 1 to 3 show a first embodiment of a dispensing device of a dispenser according to the invention, wherein the media container belonging to the dispenser is not shown.
  • the figures show various stages during an actuation process for conveying a medium contained in the media container.
  • the discharge device has substantially four assemblies 12, 14, 16, 18 which are formed axially displaceable against each other along a main axis 10.
  • the assemblies are an applicator assembly 12, a finger rest assembly 14, a discharge valve assembly 16, and a piston assembly 18.
  • the finger rest assembly 14 is axially slidable between a first upper actuation end position and a second lower actuation end position relative to the applicator assembly 12.
  • the Austragsventilbauxx 16 is formed axially slidable between an upper closed position and a lower opening position relative to the applicator 12.
  • the piston assembly 18 is relatively between a first upper stroke end position and a second lower stroke end position formed to the applicator 12 axially displaceable.
  • the applicator assembly 12 itself is firmly connected to the media container, not shown in the figures.
  • Applicator assembly 12 consists of a substantially cylindrical nose applicator 22 with discharge opening 22a located at the upper end, a screw cap 24 through which nose applicator 22 is connected to a media container, not shown, a media supply device 26 disposed axially within screw cap 24 and nose applicator 22 aligned media channel 26b and arranged in the media channel 26b blocking insert 28 and also arranged in the media channel 26 on the blocking insert 28 Entrittsventil Culture 30a. Above the inlet valve piece 30a, a radial through-hole 26e is provided in the media supply device, through which medium supplied through the medium channel 26 can pass into a metering chamber 54.
  • radial through holes 26c, 26d are provided in the media supply, which allow bypassing the blocking insert 28 in the course of conveying the medium.
  • a valve ball 30 b is arranged, which forms a ball seat valve 30 together with the inlet valve piece 30 a, which opens at a prevailing in the metering chamber 54 negative pressure.
  • the components 22, 24, 26, 28, 30 of the applicator assembly 12 are fixedly connected to each other and designed so that their position does not change to each other during the intended use of the dispenser.
  • the second assembly, the finger rest assembly 14, consists only of the finger rest 32.
  • the finger rest 32 has a cylinder portion with a cylinder wall 32a and a radially extending therefrom extending operating portion 32b for supporting the fingers.
  • the cylinder portion is double-walled in an upper region and has an inner wall 32d.
  • the lower end of the cylinder wall 32a represents a functional section 32c whose function will be explained later.
  • the finger rest 32 is slid onto the applicator assembly 12 from the outside and axially movable relative thereto between a first actuation end position shown in FIG. 1 and a second actuation end position shown in FIG.
  • the third assembly, the discharge valve assembly 16, includes a one-piece valve member 34 having a cylindrical main portion 34e. At the lower end of the main portion 34e, an actuating ring 34a is provided. At the upper end of the main section 34e, an upwardly closed inner cylinder 34c is integrally integrated into the valve element 34 via radial webs 34b. At the upper end of this inner cylinder 34c, an axially still upwardly extending locking pin 34d is integrally formed on the inner cylinder 34c.
  • the valve member 34 is axially displaceable relative to the applicator assembly 12. The upper end position of the valve element 34, shown in FIGS.
  • FIG. 1 and 2 represents a closed state in which the closing pin 34d rests flush against an annular surface 22b of the nose applicator 22 in the region of the discharge opening 22a of the nose applicator 22 and thereby discharges media through the discharge opening 22a prevented.
  • the lower end position of the valve element 34 relative to the Applikatorbauxx 12, shown in Fig. 3, illustrates the opening state in which the annular surface 22b of the nose applicator 22 and the lock pin 34d are spaced apart in the direction of the main axis 10, so that pressurized medium through the discharge opening 22a can escape.
  • the last assembly, the piston assembly 18, consists of a total of three components. These components are a driver 36, a sealing ring 38 and a piston sleeve 40. These components 36, 38, 40 are firmly connected and do not change their intended use of the donor their position to each other.
  • the driver 36 has a cylinder portion 36a, which is followed at the lower end by an outwardly facing radial portion 36b. At this radial portion 36b locking lugs 36c are formed, which extend away from the main axis 10 to the outside.
  • the locking lugs 36c are elastically and radially inwardly deflectable.
  • the piston sleeve 40 connects, which consists of an elastic material.
  • the piston sleeve 40 has a substantially cylindrical basic shape, wherein it has the largest outer diameter at its upper end 40a and the smallest inner diameter at its lower end 40b. It is connected to the driver 36 so that its lower end 40 b is disposed in the interior of the cylinder portion 36 a and its upper end projects beyond the driver 36.
  • the piston assembly 18 is disposed within the nose applicator 22 and the discharge valve assembly 16 in the discharge device and encloses the media supply device 26.
  • the sealing ring 38 and the lower end 40b of the piston skirt 40 are formed to seal inwardly against the media supply device.
  • the upper end 40 a of the piston cuff 40 is formed so as to seal outwardly against the inside of the main portion 34 e of the valve element 34.
  • the piston assembly 18 is designed to be displaceable between a first upper stroke end position and a second lower stroke end position, the first upper stroke end position being determined by a stop position of the piston cuff 40 at the end of the cylinder portion 34e of the valve element 34 and the lower stroke end position by a decoupling web 24b of the screw cap 24
  • Applicator assembly 12 is defined at which the locking lugs 36 c radially inwardly of the operative connection be pressed with the functional portion 32c of the finger rest 32, so that a further movement of the piston assembly 18 down is no longer possible. This will be explained in more detail below.
  • the discharge device shown in Figures 1 to 3 has a total of three springs, with which the finger rest 32, the valve element 34 and the piston assembly 18 are subjected to force towards the applicator assembly 12 in the direction of their respective upper end position.
  • the finger rest 32 is pushed upwards by the finger rest spring 46, which is supported on an annular shoulder 22c of the nose applicator 22.
  • Valve element 34 is urged into its closed position by a valve spring 48, valve spring 48 being held in a downwardly closed cylindrical support section 26a at the upper end of media supply device 26 and in inner cylinder 34c of valve element 34.
  • the piston assembly 18 is urged by an energy storage spring 50 in the direction of its first upper stroke end position.
  • the discharge device described and illustrated in FIGS. 1 to 3 operates as a user-independent discharge device. This means that the metered quantities and the discharge pressure are independent of the type of operation by the operator.
  • Fig. 1 shows the dispenser in a starting position.
  • the finger rest 32, the valve member 34 and the piston assembly 18 are each - by the respective springs 46, 48, 50 subjected to force - in its upper end position.
  • the functional portion 32c of the finger rest 32 is above the locking lugs 36c of the driver 36 of the piston assembly 18 is arranged.
  • the locking lugs 36c are in an undeflected state and extend through axially aligned recesses 22d of the nose applicator 22 to below the functional portions 32c of the finger rest 32.
  • the dosing chamber 54 located between the piston cuff 40 and the dosing element 34 has a minimal volume at this stage.
  • the finger rest 32 is pressed down relative to the applicator assembly 12 and against the spring force of the finger rest spring 46 by an operator. Since the latching lugs 36c are arranged below the functional sections 32c, the piston assembly 18 is likewise pushed down together with the finger rest 32. The resulting negative pressure opens the ball seat valve 30 and draws medium into the metering chamber 54. This medium takes, starting from the media container, not shown in the figures, a path through the media channel 26b of the media supply device 26, through the lower through-holes 26c below the blocking insert 28 out of the media supply device 26 and through the upper through-holes 26d above the blocking insert 28 back into the media supply device 26 inside.
  • Fig. 2 shows a state of the dispenser in the first embodiment just before the start of the discharging operation.
  • the finger rest 32 has been pressed down so far that the lower end 40b of the piston sleeve 40, the upper through holes 26d covered and thus prevents further inflow of medium into the metering chamber 54.
  • the piston assembly 18 is moved so far down together with the finger rest 32 that the locking lugs 36 c are in the region of the screw on the stopper 24 integrally formed cylindrical Entkoppelungssteges 24 b and are deflected by this with progressive depression of the finger rest 32 and the piston assembly 18 radially inwardly ,
  • the contact surface between the functional portion 32c of the finger rest 32 and the locking lugs 36c of the driver 36 is therefore always starting from the time of the first contact between the locking lugs 36c and the decoupling web 24b lower.
  • Fig. 3 shows a state towards the end of stipulateaustrags.
  • the medium contained in the metering chamber 54 is pushed out of the discharge opening 22a by the pressure generated by the energy storage spring 50 and thus exits in a precisely defined amount.
  • the discharge process ends when the piston sleeve 40 abuts against the end of the cylinder portion 34e of the valve member 34 and the metering chamber 54 can not be further reduced as a result.
  • the finger rest 32 is again brought up or released by the operator and consequently pressed upwards by the tensioned finger rest spring 46.
  • the functional portion 32c is in turn above the locking lugs 36c of the driver 36 of the piston assembly 18.
  • the locking lugs 36c are therefore pressed back into an undeflected position to the outside and thus come back into engagement with the finger rest 32nd
  • the initial state for a further actuation is thus achieved.
  • the amount of media in the metering chamber 54 is not determined by the lower stroke end position, in which the detents 36c come out of engagement of the functional portions 32c of the finger rest 32, but instead is defined by the position from which the lower end 40 b of the piston sleeve 40, the upper through holes 26 d of the media supply 26 close.
  • a particularly high dosing accuracy is achieved, since the dosing accuracy does not depend on the somewhat fluctuating position in which the locking lugs 36c come out of engagement of the functional portions 32c.
  • the second peculiarity of this embodiment is that the discharge valve, which is formed by the closing pin 34d and the annular surface 22b of the nose applicator 22, is not opened in a pressure-dependent manner.
  • FIG. 4 shows a second embodiment of a dispensing device of a dispenser according to the invention.
  • this second embodiment has four mutually displaceable assemblies, an applicator assembly 112 with a nose applicator 122, a finger rest assembly 114, a Austragsventilbauffle 116 and a piston assembly 118 with a valve element 134.
  • an applicator assembly 112 with a nose applicator 122 a finger rest assembly 114
  • a Austragsventilbaurie 116 a piston assembly 118 with a valve element 134.
  • the operation of this second embodiment is consistent with the operation of the embodiment of Figs. 1-3 Pushing down a finger rest 132, a cylindrical guide section 133 fixedly connected to the finger rest 132 is pressed down with a functional section 133c.
  • This functional portion 133c pushes down on the piston assembly 118, which is operatively connected to the finger rest group 114 via a latching nose 136c.
  • an energy storage spring 150 is compressed.
  • the detent 136c is pressed radially inward and thus enters a state decoupled from the functional section 133c.
  • the piston assembly 118 can then be pushed upwardly by the energy storage spring 150, reducing the volume of a metering chamber 154 or pressurizing the medium therein.
  • This illustrated second embodiment differs in particular with respect to two aspects of the first embodiment of FIGS. 1 to 3:
  • the displacement of the valve element 134 with the closing pin 134d is pressure-dependent and the discharge valve is therefore pressure-actuated, so that the discharge takes place automatically when a required limit pressure in the metering chamber has been reached.
  • the actuation process differs in terms of the sequence of filling the dosing 154 with the medium.
  • FIGS. 1 to 3 While the first embodiment of FIGS. 1 to 3 provides that the metering chamber 54 is filled directly as a result of the resulting negative pressure in the course of the operation, in this second embodiment it is provided that a strong negative pressure or a vacuum in the metering chamber 154 by the operation is generated, which then used in the course of the operation for sucking the medium becomes.
  • a media supply device 126 is designed in this second embodiment so that in the initial position shown in Fig. 4 no connection between the metering chamber 154 and a media channel 126b is made.
  • the metering chamber 154 is separated from the media container. From this point on, the pressure in the metering chamber 154 is increased as a result of the volume reduction or the force applied to the cylinder assembly. As soon as the pressure in the metering chamber has exceeded a discharge limit value, the valve element 134 and the closing pin 134d molded onto it become pressed down against the spring force of a valve spring 148 and the discharge process begins by a discharge opening 122a. The discharge process is continued until the metering chamber 154 is completely reduced and the pressure in the metering chamber 154 has dropped below this limit and the closing pin 134d of the valve element 134 closes the discharge opening again.
  • this second embodiment lies in the way in which the medium is conveyed into the metering chamber. Unlike the first embodiment, in which the promotion begins simultaneously with the displacement of the piston sleeve 40, in this second embodiment, first a vacuum or a strong negative pressure in the metering chamber 154 is constructed, which in the further course of the operation for conveying a defined amount of Medium leads.
  • FIG. 5 shows a third embodiment of a dispensing device of a dispenser according to the invention. This has - as well as the first two embodiments - four separate modules.
  • An applicator assembly 212 with a nose applicator 222 is connected in a manner not shown firmly with a media container.
  • a finger rest assembly 214 is disposed relative to the applicator assembly 212 axially displaceable in the direction of a major axis 210.
  • a discharge valve assembly 216 and a piston assembly 218 are slidably disposed axially relative to the applicator assembly 212.
  • the finger rest assembly includes a finger rest 232 and a cylindrical guide portion 233 with an inwardly projecting operative portion 233c.
  • the piston assembly 218 consists of a driver 236 and a piston sleeve 240.
  • the driver 236 has at the lower end locking lugs 236c, which in an undeflected state, as shown in Fig. 5, into the region of Function section 233c extending radially outward.
  • a metering chamber 254 is arranged which is closed at the top by a wall insert 260 belonging to the applicator assembly 212.
  • the metering chamber 254 is connected via a media channel 226b with the media container, not shown in FIG.
  • a ball seat valve 240f which is formed to close when the pressure in the metering chamber 254 is higher than that of the medium container.
  • the wall insert 260 terminating the metering chamber 254 separates the metering chamber 254 from a pressure chamber 262.
  • Medium can pass from the metering chamber 254 via a second ball seat valve 260a into this pressure chamber 262.
  • the second ball seat valve 260 a is designed so that it opens when the pressure in the metering chamber 254 is greater than the pressure in the pressure chamber 262.
  • a valve element 234 of the discharge valve assembly 216 is axially displaced axially against an upward spring force of a valve spring 248 so that the media may be sprayed through the discharge port 222a.
  • this embodiment is largely comparable to the first embodiment shown in Figs. Again, the finger rest 232 is manually pushed down, with the piston assembly 218 also being forced downwardly due to the coupling of the detents 236c with the functional portions 233c. As in the embodiment of FIGS. 1 to 3 thereby medium flows into the metering chamber 254, since the ball seat valve 240f opens due to the prevailing by the increase in volume in the metering chamber 254 negative pressure. Notwithstanding the second embodiment described, however, the discharge valve does not become dependent opened in the metering chamber 254 pressure, but instead depending on a pressure prevailing in the pressure chamber 262 pressure.
  • the pressure within the pressure chamber 262 can only rise during subsequent actuations of the discharge device.
  • the pressure in the pressure chamber 262 is high enough, any further actuation of the dispenser and any other amount of media dispensed through the metering chamber 254 always results in a dispensing process.
  • an operation must be performed a few times until the pressure in the pressure chamber 262 is sufficiently large to effect a discharge operation.
  • An advantage of the illustrated embodiment is that the volume of the metering chamber 254 in the unactuated state by the separation of the pressure chamber 262 and metering chamber 254 is relatively low. This has the consequence that the pressure in the metering chamber in the course of the operation increases very much. The pressure in the pressure chamber 262 increases gradually until the limit pressure required to open the discharge valve is reached gradually with each actuation of the discharge device. In this way, very high discharge pressures and a corresponding discharge behavior of the dispenser can be achieved.
  • a discharge device is to be feared in poor design that the increased pressure in the course of the operation in a uniform metering and pressure chamber only compression of the residual air contained in the uniform metering and pressure chamber result, the pressure but not to open the discharge valve is sufficient.
  • this compressed air would be decompressed again and then compressed again without any change in the pressure ratios in the unitary metering and pressure chamber compared to the previous actuation.
  • the air can not escape, it would not be possible to actually put the dispenser into operation.
  • FIGS. 6a and 6b and FIGS. 7a and 7b show a further embodiment of a dispenser according to the invention.
  • the basic structure of this fourth embodiment of a dispenser according to the invention is consistent with the structure of the dispenser shown in FIGS. 1 to 5 insofar as also four separate and axially mutually displaceable modules are provided, which is a permanently connected to a media container Applicator assembly 312 with a nose applicator 322, a finger rest assembly 314, a Austragsventilbau devis 316 and a piston assembly 318 acts.
  • the interaction of the finger rest assembly 314, the applicator assembly 312 and the piston assembly 318 as well as the manner of conveying the medium from the media container into a metering chamber 354 largely corresponds to the second embodiment shown in FIG.
  • the main difference to this and all other embodiments described above lies in the manner of coupling and decoupling the finger rest assembly 314 with the piston assembly 318 in the course of the operation of the dispenser and in the movement of the piston assembly 318 after decoupling from the finger rest assembly 314 in the second lower stroke end position.
  • the finger rest assembly 314 having a finger rest 332, the applicator assembly 312, and the piston assembly 318 are configured such that the movement of the piston assembly 318 from a second lower stroke end position to a first upper stroke end position translates toward a major axis 310 simultaneously Rotational movement about the major axis 310 takes place. While the finger rest assembly 314 is rotationally connected to the applicator assembly 312 such that the finger rest assembly 312 has only one translational degree of freedom relative to the applicator assembly in the axial direction, the piston assembly 318 is constrainedly rotatably guided on a cylindrical outer surface of a media delivery device 326.
  • the applicator assembly 312 has a guide portion 324c formed on a screw cap 324 and cylindrically shaped, on the inside of which a sawtooth profile 366 is provided.
  • the sawtooth profiling 366 consists of individual sawteeth 368, which are separated from each other by extending in the direction of the major axis 310 grooves 370.
  • the saw teeth 368 each have a vertical flank 368a extending in the direction of the main axis 310 and a screw-shaped cam flank 368b designed as a control curve and lying opposite the vertical flank 368a.
  • the saw teeth are each aligned identically, so that the control cam edges 368b are aligned in a view of the control cylinder portion in the direction of the main axis 310 either all clockwise or all counterclockwise.
  • the piston assembly 318 has a piston collar 340 and a driver 336.
  • a total of six radially outwardly extending wings 372 are formed, which are spaced from each other by 60 ° and have a radial length which allows them to protrude into the grooves 370.
  • the wings 372 have a quadrangular cross-sectional area, wherein two parallel, opposing support surfaces 372a corresponding to the grooves 370 of the sawtooth profiling 366 are executed perpendicular and parallel to the main axis 310.
  • a third, obliquely upwardly facing contact surface 372b is angled relative to the main axis 310 by an angle of about 60 °, the orientation of this contact surface 372b with the opposite cam edges 368b of the saw teeth 368 corresponds.
  • the finger rest 332 has a total of twelve thrust arms 332e arranged in a circle and spaced apart from one another by 30 °, each of which extends identically from the main axis 310, spaced in the direction of the main axis 310, from above into the guide cylinder section 324c of the applicator subassembly 312.
  • the push arms 332e each have a contact surface 332f which is opposite to the main axis 310 to the same extent as the contact surfaces 372b of the wings 372 of the driver 336 is inclined.
  • the driver 336 is shown in FIGS. 6a and 6b in its first upper stroke end position.
  • the six wings 372 of the follower 336 extend radially outwardly into the grooves 370 of the sawtooth profiling 366. Since the wings 372 are each spaced 60 ° apart and the grooves 370 are spaced from each other by 30 °, in each case only each second groove 370 is a wing 372 of the follower 336.
  • the finger rest 332 is in its upper operating end position.
  • the push arms 332e extend in this upper actuating end position down into the guide cylinder section 324c and lie there with their contact surfaces 332f flush to the contact surfaces 372b of the wings 372 of the driver 336 at.
  • a negative pressure or vacuum is created in the metering chamber 354 and subsequently, after reaching a through-bore 326b by a sealing web 340d closing off the metering chamber 354 for the purpose of flowing medium into the metering chamber 354.
  • this fourth embodiment has two major advantages:
  • the illustrated movement of the driver 336 and thus the piston sleeve 340 leads to a slower loading stroke in the course of the return stroke, in which it is ensured that the filling of the metering chamber 354 is completed before the metering chamber 354 is separated by the sealing ridge 340d of the piston cuff 340 with respect to the media container.
  • This slowed movement ensures that in the dosing chamber 354 not a negative pressure is maintained while not reaching the desired dosage.
  • the second major advantage is that, unlike Embodiments 1 to 3, no elastic deformation of components for coupling / decoupling the piston assembly 318 to and from the finger rest 332 is required. The risk of failure of the discharge by wear or breakage of a locking lug or other elastic member is thereby reduced.

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EP05014621.6A 2004-07-13 2005-07-06 Distributeur de produit fluide Not-in-force EP1616630B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004035141 2004-07-13
DE102005009294A DE102005009294A1 (de) 2004-07-13 2005-02-22 Spender für Medien

Publications (3)

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EP1616630A2 true EP1616630A2 (fr) 2006-01-18
EP1616630A3 EP1616630A3 (fr) 2007-12-26
EP1616630B1 EP1616630B1 (fr) 2013-11-20

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US (1) US20060011659A1 (fr)
EP (1) EP1616630B1 (fr)
DE (1) DE102005009294A1 (fr)

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Also Published As

Publication number Publication date
EP1616630A3 (fr) 2007-12-26
US20060011659A1 (en) 2006-01-19
EP1616630B1 (fr) 2013-11-20
DE102005009294A1 (de) 2006-02-16

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