EP0201809B1 - Distributeur de fluide - Google Patents

Distributeur de fluide Download PDF

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Publication number
EP0201809B1
EP0201809B1 EP86105985A EP86105985A EP0201809B1 EP 0201809 B1 EP0201809 B1 EP 0201809B1 EP 86105985 A EP86105985 A EP 86105985A EP 86105985 A EP86105985 A EP 86105985A EP 0201809 B1 EP0201809 B1 EP 0201809B1
Authority
EP
European Patent Office
Prior art keywords
pump
piston
cylinder
storage area
dispenser according
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
Application number
EP86105985A
Other languages
German (de)
English (en)
Other versions
EP0201809A1 (fr
Inventor
Lothar Graf
Leo Maerte
Thomas Skorka
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
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 Ing Erich Pfeiffer GmbH filed Critical Ing Erich Pfeiffer GmbH
Publication of EP0201809A1 publication Critical patent/EP0201809A1/fr
Application granted granted Critical
Publication of EP0201809B1 publication Critical patent/EP0201809B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/0005—Containers or packages provided with a piston or with a movable bottom or partition having approximately the same section as the container
    • B65D83/0033—Containers or packages provided with a piston or with a movable bottom or partition having approximately the same section as the container the piston being a follower-piston and the dispensing means comprising a hand-operated pressure-device at the opposite part of the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/02—Membranes or pistons acting on the contents inside the container, e.g. follower pistons
    • B05B11/028—Pistons separating the content remaining in the container from the atmospheric air to compensate underpressure inside the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B05B11/1004—Piston pumps comprising a movable cylinder and a stationary piston
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1066—Pump inlet valves
    • B05B11/107—Gate valves; Sliding valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1073—Springs
    • B05B11/1074—Springs located outside pump chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1073—Springs
    • B05B11/1077—Springs characterised by a particular shape or material

Definitions

  • the invention relates to a media dispenser with a storage container which, in particular with a drag piston which can be displaced therein, forms a vacuum-tightly closed storage space which can be changed in volume in order to maintain full filling with the amount of active substance in the starting quantity, and with a storage container provided on the outlet end with a media discharge opening connected, self-priming piston pump, the pump cylinder designed for the relatively displaceable receiving of a pump piston delimits a pump chamber which can be connected to the storage space.
  • Known media dispensers of this type are generally used for pasty active ingredients, for example toothpaste.
  • the known dispensers are not suitable for media which are to be atomized, for example low-viscosity media, such as medical therapeutic and prophylactic agents or the like, and in particular for the discharge of precisely metered small amounts. They are also relatively difficult to operate and the discharge pressure is usually low.
  • FR-A-2 393 279 has also made known a media dispenser for low-viscosity media with a piston pump, the openings of which, when the container is sufficiently filled, lie immersed within the filled part of the storage space when the container is sufficiently filled.
  • this piston pump is not self-priming, but is designed so that the thin fluid medium flows into the pump cylinder through the openings due to gravity when the pump piston is in the initial position.
  • a volume-variable design of the storage space is not provided in this known media storage, and no measures are provided to prevent the use of z.
  • a trailing piston could make sense, especially since the piston pump extends to the bottom of the container. Since the openings for filling the pump chamber are at a distance from the bottom of the container, only a very inadequate emptying of the storage space is possible.
  • the invention is based on the object of providing a media dispenser of the type mentioned which, with a simple structure, ensures a very precise and precisely repeatable metering of the amount of media discharged and nevertheless enables higher discharge pressures, so that the dispenser can also be used for such media, that are to be atomized during discharge.
  • connection opening is preferably formed by the open end of the pump cylinder, through which the pump piston is completely moved out of the pump cylinder towards the end of the return stroke and which in particular has a funnel-shaped inlet surface for the pump piston.
  • this configuration ensures that the lowest possible flow resistances occur when the medium is sucked into the pump chamber, the size of the connection opening corresponding to the inner cross section of the pump cylinder, which accommodates a sudden suction of the medium after the connection opening has been released; due to the funnel-shaped inlet surface, the flow resistances that occur are further reduced.
  • connection opening is expediently closed on part of the return stroke of the pre-suction piston and / or the piston sealing surface of the pre-suction piston is provided at the free end of the intermediate cylinder.
  • a structurally simple embodiment is achieved if the pump piston is arranged in a fixed position relative to the intermediate cylinder, in particular approximately coaxially in the intermediate cylinder, and preferably at least one transition opening incorporating the intermediate cylinder into the storage space is provided between the outer circumference of the pump piston and the inner circumference of the intermediate cylinder.
  • the total cross section of this transition opening is to be achieved.
  • favorable flow conditions expediently larger than that of the connection opening.
  • the metering chamber is designed to be volume-variable, preferably the end wall of the pump cylinder opposite the pump piston, for example with an outlet sleeve guided in an adjusting thread of the cylinder wall of the pump cylinder, axially adjustable and guided, for example, by self-locking.
  • the pump stroke of the thrust piston pump is limited by the pump piston striking the opposite end wall of the pump cylinder.
  • the pump piston and the pump cylinder are spring-loaded against each other in the starting position and are limit-stop in the starting position, the pump cylinder preferably being movably mounted with a handle, for example a container cap receiving a return spring and covering the pump is.
  • a return spring can also be designed as a resilient element which is in one piece with at least one of the two components which can be moved relative to one another and in particular can be formed by bulging guide arms of the handle which are subjected to buckling.
  • the pump piston therefore forms a unit that is structurally combined with the storage container and is fixed relative to it, while the cylinder and possibly the pre-suction piston represent the parts that have to be moved by hand during the pump stroke, which results in a structurally very simple configuration of the dispenser.
  • an outlet valve is designed as a check valve, which preferably has an outlet nipple provided on the circumference with at least one outlet opening and, as a valve closing part, a valve stocking elastically surrounding the outlet nipple, the free end of which, for example, forms the outlet opening. This also ensures that the outlet valve closes very quickly and tightly at the end of the media discharge or at the beginning of the return stroke and maintains this vacuum-tight seal securely until the metering space is filled again or until the next pumping stroke.
  • the design of the dispenser is further simplified if all essential parts of the dispenser are arranged in a common axis and are expediently axially symmetrical; this applies in particular to the pump cylinder, the storage space, the outlet opening, the intermediate cylinder, the handle and the drag piston.
  • the cross section of the dispenser can be round, in particular circular, polygonal or different.
  • the piston pump is arranged projecting into the storage space and preferably has a suction part which is approximately axially aligned with the pump piston as the end section projecting furthest into the storage space.
  • the medium is taken over deeply from the storage space by the pump cylinder, so that the medium within the storage space only has to carry out very small internal flow movements.
  • the suction port is overhung in the storage room.
  • the outlet valve is provided so that the pump cylinder is particularly securely sealed to the outside when the dispenser is not in use, that is to say when the pump piston is unloaded.
  • the valve closing pressure of the outlet valve is higher than the maximum pressure in the storage space, so that under no circumstances can active ingredient escape from the dispenser unintentionally, that is to say without actuating the pump.
  • This also makes it possible to put the active substance in the pump cylinder under increased pressure during the pump stroke of the pump piston without the medium already being able to escape, after which the medium compressed in this way is suddenly released at the associated end of the pump cylinder and exits through mechanical opening of the outlet valve.
  • this also makes it possible to design the dispenser in such a way that the medium inside the dispenser can under no circumstances come into contact with air, which is of great importance in some medical media, for example.
  • the trailing piston is of a hollow, cup-shaped design with respect to the piston pump and that the inner cross sections of the trailing piston are essentially exactly matched to the, in particular stepped, outer shape of the section of the piston pump protruding into the storage space. that this section fills the cavity of the trailing piston when the storage space is empty.
  • the design of the dispenser according to the invention enables a very precise metering of the amount of media discharged per piston stroke even if this amount is very small, for example on the order of a few hundredths of a cubic centimeter.
  • a media dispenser As shown in FIGS. 1 to 5, a media dispenser according to the invention has a storage container 2, which is designed, for example, as a standing vessel, and a storage cap arranged thereon at the same time as a closure cap.
  • Thrust piston pump 1 which is provided, for example, on the upper end opposite the standing surface of the storage container 2.
  • the push piston pump 1 of which essential parts or the parts which are fixed in position relative to the storage container 2 are formed integrally therewith, has a cylinder 3 which can be moved in the longitudinal direction of the storage container 2 by more than the pump stroke and which is fixed in position on the storage container 2 arranged pump piston 4 is assigned.
  • the cylinder 3 is in turn formed at its free end as a pre-suction piston 5 which is guided in an intermediate cylinder 6 surrounding the pump piston 4 at a distance.
  • This intermediate cylinder 6 forms the neck of the storage container 2 provided at the associated end, both the inner cross sections of the intermediate cylinder 6 and that of the cylinder 3 being smaller than those of the storage container 2.
  • the intermediate cylinder 6 extends as far as the associated end wall 7 of the continuously cylindrical storage container 2, for example, and its free end projects further than the pump piston 4 located in it, which is thus provided entirely within the intermediate cylinder 6.
  • the pumping piston 4 is arranged on a piston-shaped piston shaft 8, as seen in its axial direction, as a result of which four transfer openings 9 are formed between the interior of the storage container 2 and the cylinder space 10 of the intermediate cylinder 6, which lie approximately in the plane of the end wall 7.
  • the priming piston 5 can be moved approximately to the free end of the intermediate cylinder 6 so that the pump piston 4 has been completely moved out of the open end of the cylinder 3 for about the last third of the return stroke, in such a way that its front opening facing the pump piston 4 opens into the cylinder chamber 10 forms open connection opening 11 which can be closed by the pump piston 4 in the manner of a slot control.
  • This connection opening 11 is essentially delimited by the narrower end of a funnel or truncated cone-shaped inlet surface 12 for the pump piston 4, the narrower end of which connects directly to the piston race 13 of the cylinder 3 and the other end of which is larger than the piston cross-section;
  • the inlet surface 12 has a taper angle of approximately 90 °.
  • cylindrical piston runway 13 delimits that part of the pump chamber of the push piston pump 1 which is provided as a metering chamber 15, since the pump piston 4 at least approximately abuts the annular shoulder-shaped end face 14 of the piston running surface 13 at the end of the pump stroke.
  • the cylinder 3 is structurally or integrally united with an outlet nipple 16 which, with the interposition of an outlet valve 17 designed as a check valve, connects the metering chamber 15 to an outlet opening 18 for the active substance.
  • This line connection 19 is relatively short and essentially rectilinear, with a cross-section to setback valve 17 gradually decreases and is expanded again between the check valve 17 and the outlet opening 18.
  • the line connection 19 is formed by a first section which is axially identical to the metering chamber 15 and has a reduced cross section compared to the metering chamber 15, an adjoining section which is again reduced in cross section and also lies in the axis of the metering chamber 15, and two or more radially in this opening openings formed in the outlet nipple 16, these outlet openings 20 simultaneously form the valve openings of the exhaust valve 17.
  • the outlet valve 17 has an elastic valve stocking which surrounds the entire length of the outlet nipple 16 and is secured against axial displacement, which surrounds the outlet nipple 16 in the region of the outlet openings 20 lying on its periphery and tightly over the end of the outlet nipple 16 in such a way protrudes that it directly forms with its end the outlet opening 18, the opening cross section of which is therefore essentially equal to the largest cross section of the outlet nipple 16.
  • the cylinder 3 and the outlet nipple 16 are provided on the end wall 23 of a handle 27, which is perpendicular to the central axis of the dispenser, and are formed integrally therewith.
  • This handle 22 has several, in the illustrated embodiment four, evenly distributed over the circumference, parallel to the dispenser 8 guide arms 24, which surround the reservoir 2 on the circumference with a slight distance and are provided at their ends with inwardly directed cams 25, which as the return stroke limiting stop 26 is associated with an annular collar projecting beyond the outer circumference of the storage container 2.
  • a return spring 27 is provided within the guide arms 24 as a return spring 27 which is supported on the one hand on the inside of the end wall 23 and on the other hand on the stop 26 and surrounds the reservoir 2 over the circumference over part of its length.
  • a return spring 27 is also conceivable to attach the ends of the guide arms 24 facing away from the end wall 23, for example by one-piece manufacture, to the storage container 2 and to design them with regard to their elasticity and strength such that they themselves act as return springs in such a way that they act during the pumping stroke can be arched outward from their stretched position in a resiliently arched manner.
  • the trailing piston 29 is freely movable along its cylinder track with relatively little friction, the storage container 2 being open on the side of the piston 29 remote from the storage space 28 or provided with a pressure compensation opening so that the piston 29 on this side no negative pressure can arise.
  • the storage space 29 including the cylinder space 10, the metering space 15 and the line connection 19 is completely filled with the medium to be metered out and the cylinder 3 is under the force of the return spring 27 at the end of its return stroke. If the cylinder 3 is now moved against the force of the return spring 27 in the direction of the pump piston 4, part of the amount of media in the cylinder chamber 10 is first displaced in the direction of the reservoir chamber 28 until the pump piston 4 along the inlet surface 12 marks the beginning of the piston raceway 13 Dosing chamber 15 reached and thereby closed it; the closing voltage of the exhaust valve 17 is chosen so large that it does not open until this moment. Therefore, the climbing piston is pushed back in this phase and, if it is relatively stuck, loosened.
  • the amount of media located in the metering chamber 15 is pressurized by the pump piston 4, whereby the outlet valve 17 according to FIG. 2 opens, so that the metered amount of media exits via the line connection 19 at the outlet opening 18.
  • the total stroke is, for example, only 5 mm and the storage container 2 of the dispenser shown enlarged in FIGS. 1 to 5 holds, for example, only about four cubic centimeters.
  • the outlet valve 17 closes again automatically due to the elastic tension of the valve closing parts 21.
  • the cylinder 3 according to FIG. 3 is moved back to its starting position under the force of the return spring 27 .
  • the pre-suction piston 5 moves back in the intermediate cylinder 6, as is the case for the pump piston 4 and the cylinder 3. Due to the negative pressure occurring in the intermediate cylinder 6, medium is sucked into the intermediate cylinder 6 from the storage space 28.
  • the connection opening 11 is suddenly released during the further return stroke movement, the maximum possible negative pressure being reached at this moment by the return stroke movement of the pump piston 4 in the metering chamber 15.
  • the cylinder space 10 thus belongs to the storage space 28, in which the connection opening 11 is completely immersed during the return stroke.
  • the climbing piston 29 is trailed by the underpressure which arises in the storage space 28 by a distance corresponding to the metered quantity, such that the storage space 28 decreases in volume but always remains completely filled.
  • FIG. 6 the same reference numerals as in FIGS. 1 to 5, but with the index “a, are used for parts that correspond to one another.
  • the push piston pump 1 a according to FIG. 6 is of this type designed to be removable from the storage container 2a so that it can be refilled with active substance through its container neck.
  • the pump piston 4a and the intermediate cylinder 6a are structurally combined with a screw sleeve 7a, which can be detachably screwed onto an external thread of the container neck 31 and forms a vacuum-tight seal.
  • the handle 22a is in this case limited in terms of its return stroke directly against the screw sleeve 7a.
  • the outlet nipple in the embodiment according to FIG. 6 is formed by an outlet sleeve 16a which is provided with an external thread with which it is adjustable in the direction of the pump stroke in an adjusting thread 30 provided in the cylinder wall 13a of the pump cylinder 3a and can be determined by self-locking.
  • This outlet sleeve 16a forms with its inner end the end wall 14a of the metering chamber 15a opposite the pump piston 4a, so that the size of the metering chamber 15a and thus the amount of media to be metered out can be changed by adjusting the outlet sleeve 16a.
  • the media dispenser according to the invention is particularly suitable, for example, for the metered delivery of active ingredients for inhalation devices or as a drip dispenser, which can be designed for an exact number of liquid drops to be dispensed per pump stroke. However, it can also be used for other media than drugs.
  • the piston pump can also be positively attached to the container in such a way that it lies at a distance from the inner circumference of the neck and projects relatively deep into the storage space 28 with a suction part or suction nozzle, for example, forming an inner tapered end.
  • the trailing piston can then have an outer piston ring with two annular, sealed lips provided at both ends and a fitting sleeve lying therein, which with its open end facing the piston pump merges in one piece and tightly into the piston ring.
  • the internal cross sections of the fitting sleeve lying axially aligned with the section of the piston pump 1 projecting over the end wall 7 of the container 2 into the storage space 28, which fitting sleeve can be closed in a cup shape at its end remote from the piston pump 1 and projecting beyond the associated end of the piston ring Appropriately adapted to the outer shape of the above-mentioned protruding portion of the piston pump 1 in such a way that, in the end position of the trailing piston 29 associated with the emptied storage space 28, the protruding portion of the piston pump 1 almost completely fills the interior of the adapter sleeve and the free end of the suction part on the bottom wall the fitting sleeve fits.
  • the associated end face of the trailing piston 29 then bears almost completely over the inside of the end wall 7 of the container 2.
  • the storage space 28 can thereby be completely emptied except for the tiniest remains of medium.
  • the atomization or the discharge can also be carried out in any position of the dispenser, for example in the top position, since medium is always present on the suction part.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Reciprocating Pumps (AREA)

Claims (11)

1. Un distributeur de milieu, comportant un récipient de réserve (2), qui constitue en particulier avec un piston de poussée (29) qui peut y coulisser, un espace de réserve (28) fermé étanche au vide, variable en volume pour être maintenu à l'état plein à l'aide de la réserve de matière active et une pompe (1) à amorçage automatique disposée à une extrémité du récipient, reliée du côté vidage à une ouverture d'éjection de milieu ; pompe dont le cylindre de pompe (3) constitué pour recevoir en coulissement relatif un piston de pompe (4) limite une chambre de pompe qui peut être raccordée à l'espace de réserve (28), caractérisé en ce que le cylindre de pompe (4), constitué pour s'amorçer automatiquement, libère vers la fin de la course de retour à la manière d'une commande à fente, une ouverture de liaison (11) entre l'espace de réserve (28) et la chambre de pompe évacuée et en ce que la partie de la chambre de pompe, située entre la position finale de pompe du piston de pompe (4) et l'ouverture de liaison (11), est prévue comme chambre de dosage (15), dont l'ouverture de liaison (11) plonge comme ouverture d'aspiration au moins dans la position de libération du piston de pompe (4) dans cet espace de réserve (28), étanche au vide à l'état plein.
2. Distributeur selon la revendication 1, caractérisé en ce que l'ouverture de liaison (11) est constituée par l'extrémité ouverte du cylindre de pompe (3), à travers laquelle le cylindre de pompe (4) à la fin de la course de retour est complètement sorti du cylindre de pompe (3) évacué et qui présente en particulier une surface d'insertion (12) en forme de trémie, pour le piston de pompe (4).
3. Distributeur selon la revendication 1 ou 2, caractérisé en ce que cylindre de pompe (3) de son côté est constitué comme piston de préaspiration (5) à double effet qui est guidé dans un cylindre intermédiaire (6), formé en particulier par une collerette du récipient de réserve raccordée au récipient de réserve (28).
4. Distributeur selon l'une des revendications précédentes, caractérisé en ce que l'ouverture de liaison (11) est fermée sur une partie de la course de retour du piston de préaspiration et/ou que la surface d'étanchéité de piston du piston (5) de préaspiration est prévue à l'extrémité libre du cylindre intermédiaire (6) et en ce que de préférence le piston de pompe (4) est disposé en position fixe par rapport au cylindre intermédiaire (6) ou à peu près coaxialement dans le cylindre intermédiaire (6) et qu'éventuellement entre la périphérie extérieure du piston (4) et la périphérie intérieure du cylindre intermédiaire (6) est prévue au moins une ouverture de transfert (9) qui intègre le cylindre intermédiaire dans l'espace de réserve (28).
5. Distributeur selon l'une des revendications précédentes, caractérisé en ce que t'espace de dosage (15a) est constitué pour être variable en volume, la paroi frontale (14a) du cylindre de pompe (3a) opposée au piston de pompe (4a) étant de préférence guidée en étant mobile axialement et en pouvant être bloquée, par exemple au moyen d'un manchon de vidage (16a) guidé dans un filetage de réglage (30) de la paroi de cylindre (13a) du cylindre de pompe (3a).
6. Distributeur selon l'une des revendications précédentes, caractérisé en ce que le piston de pompe (4) et le cylindre de pompe (3) sont sollicités élastiquement l'un par rapport à l'autre vers la position de sortie et son limités par butée dans la position de sortie et en ce que de préférence le cylindre de pompe (3) est logé de façon mobile avec une manette (22) telle qu'un capuchon de récipient recouvrant la pompe.
7. Distributeur selon l'une des revendications précédentes, caractérisé en ce qu'un ressort de rappel est constitué comme élément sollicitant élastiquement d'un seul tenant avec au moins l'un des deux composants mobiles l'un par rapport à l'autre (2, 22) et en particulier qu'il est constitué par des bras de guidage (24) de la manette (22) susceptibles de se redresser, chargés par flambement.
8. Distributeur selon l'une des revendications précédentes, caractérisé en ce qu'une valve de vidage (17) est réalisée comme clapet anti-retour, qui présente de préférence un raccord de vidage (16), comportant au moins un orifice de sortie (20) en périphérie et comme pièce de raccordement de valve (21), un manchon de valve entourant élastiquement le raccord fileté (16) de vidage, manchon dont l'extrémité libre constitue par exemple l'ouverture de vidage (18).
9. Distributeur selon l'une des revendications précédentes, caractérisé en ce que la liaison par conduite (19) entre l'espace de dosage (15) et la valve de vidage (17) vers celle-ci, de préférence sensiblement rectiligne et/ou complètement libre en section transversale à l'intérieur de sa limitation extérieure, diminue par exemple de façon étagée et que de préférence le cylindre de pompe (3) et/ou l'espace de réserve (28) et/ou l'orifice de vidage (18) et/ou le cylindre intermédiaire (6) et/ou la manette (22) et/ou le piston de poussée (29) sont disposés coaxialement les uns aux autres et/ou présentent une symétrie axiale.
10. Distributeur selon l'une des revendications précédentes, caractérisé en ce que le piston de pompe est disposé en saillie dans l'espace de réserve (28) et présente comme partie d'extrémité faisant saillie le plus loin dans l'espace de réserve (28) une pièce d'aspiration à peu près coaxiale au piston de pompe, le piston de poussée (29) étant réalisé creux en forme de godet ouvert vers la pompe à piston et les sections transversales intérieures du piston de poussée (29) étant adaptées de façon sensiblement précise à la forme extérieure de la partie de la pompe de piston (1) faisant saillie dans l'espace de réserve (28), de sorte que cette partie remplit l'espace vide du piston de poussée (29) lorsque l'espace de réserve (28) est vidé.
11. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le cylindre de pompe (3), lorsque le piston de pompe (4) est en position arrière, est fermé hermétiquement de façon étanche à la pression par rapport à l'extérieur et en ce que la pression de fermeture de valve de la valve (17) de vidage est supérieure à la pression maximale dans l'espace de réserve (28).
EP86105985A 1983-10-28 1984-08-15 Distributeur de fluide Expired EP0201809B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3339180A DE3339180C2 (de) 1983-10-28 1983-10-28 Austragvorrichtung für Medien
DE3339180 1983-10-28

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP84109706.6 Division 1984-08-15

Publications (2)

Publication Number Publication Date
EP0201809A1 EP0201809A1 (fr) 1986-11-20
EP0201809B1 true EP0201809B1 (fr) 1989-10-11

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP86105985A Expired EP0201809B1 (fr) 1983-10-28 1984-08-15 Distributeur de fluide
EP84109706A Expired EP0143183B1 (fr) 1983-10-28 1984-08-15 Distributeur de matières actives

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP84109706A Expired EP0143183B1 (fr) 1983-10-28 1984-08-15 Distributeur de matières actives

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US (2) US4694977A (fr)
EP (2) EP0201809B1 (fr)
JP (1) JPH0672788B2 (fr)
DE (3) DE3339180C2 (fr)

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Also Published As

Publication number Publication date
DE3339180C2 (de) 1993-10-14
US4694977A (en) 1987-09-22
US4944430A (en) 1990-07-31
EP0143183A3 (en) 1986-08-27
JPH0672788B2 (ja) 1994-09-14
DE3471912D1 (en) 1988-07-14
DE3339180A1 (de) 1985-05-09
DE3480057D1 (en) 1989-11-16
EP0143183B1 (fr) 1988-06-08
EP0201809A1 (fr) 1986-11-20
EP0143183A2 (fr) 1985-06-05
JPS60111925A (ja) 1985-06-18

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