EP0605275A1 - Assembly for spraying a liquid comprising a precompression pump - Google Patents

Assembly for spraying a liquid comprising a precompression pump Download PDF

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Publication number
EP0605275A1
EP0605275A1 EP93403031A EP93403031A EP0605275A1 EP 0605275 A1 EP0605275 A1 EP 0605275A1 EP 93403031 A EP93403031 A EP 93403031A EP 93403031 A EP93403031 A EP 93403031A EP 0605275 A1 EP0605275 A1 EP 0605275A1
Authority
EP
European Patent Office
Prior art keywords
piston
chamber
assembly according
rod
chambers
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
EP93403031A
Other languages
German (de)
French (fr)
Other versions
EP0605275B1 (en
Inventor
Philippe Renault
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.)
LOreal SA
Original Assignee
LOreal SA
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Filing date
Publication date
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Publication of EP0605275A1 publication Critical patent/EP0605275A1/en
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Publication of EP0605275B1 publication Critical patent/EP0605275B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0037—Containers
    • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
    • B05B11/0044—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means
    • 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
    • B05B11/0037—Containers
    • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
    • B05B11/0044—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means
    • B05B11/00442—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means the means being actuated by the difference between the atmospheric pressure and the pressure 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
    • B05B11/1009—Piston pumps actuated by a lever
    • B05B11/1011—Piston pumps actuated by a lever 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
    • B05B11/1001—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
    • B05B11/1001—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
    • 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
    • B05B11/0037—Containers
    • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means

Definitions

  • the present invention relates to an assembly for spraying a liquid comprising a precompression pump.
  • spray assemblies constituted by a container, on the neck of which is fixed a dispensing head comprising a pump of the precompression type. These assemblies are used in many fields, in particular in cosmetics, for the spraying of more or less viscous liquids which may possibly have the consistency of a cream or a fluid paste, in particular perfumes.
  • Precompression pumps are pumps which generally have two chambers: a first chamber into which the liquid to be sprayed is introduced by means of a non-return valve and into which it is subjected to precompression using a piston, generally manually actuated from the outside against the action of an elastic return device, and a second chamber connected to a nozzle for spraying the liquid.
  • the precompression of the liquid in the first chamber is intended to ensure good quality of spraying, from the start of spraying.
  • the present invention relates to an assembly in which the dispensing head comprising the pump contains a reduced number of parts, which is therefore easier to mount.
  • the subject of the present invention is an assembly for spraying a liquid consisting of a container containing the liquid to be sprayed, container on the neck of which is fixed a dispensing head provided with a precompression pump comprising two chambers: a first chamber, precompression, closed by a piston manually actuated from the outside against the action of at least one elastic return means, and in communication with the container via a non-return valve, and a second chamber capable of to communicate with the first at the end of the precompression phase and comprising a spray nozzle, characterized by the fact that the two chambers are aligned on the same longitudinal axis, that the walls of the two chambers are fixed and constitute a single body, that the piston is mounted to slide relative to a rod provided with a needle capable of opening and close the communication between the first and second chambers, and that the spray nozzle is arranged on a fixed wall of the second chamber.
  • This embodiment makes it possible to reduce the number of parts required, since the two chambers are contained in the same body.
  • the spray nozzle is fixed, which limits the dimensions of the window for discharging the jet of sprayed liquid when the dispensing head is covered with a cap. This limits the risk of intersection between the spray of liquid spray and the edge of the window and, consequently, losses of sprayed liquid.
  • the dispensing head may also include an additional part: a capsule closing the body, which is provided with an opening traversed by the piston, and which has the function of preventing the piston from being able to leave the body.
  • the body has a generally cylindrical shape, the two chambers being separated by a transverse partition comprising an opening forming a passage between the first chamber and the second chamber, the orifice through which the second chamber opens into the opening forming a seat for the needle and allowing communication between the two chambers.
  • the body containing the two chambers carries a skirt allowing the fixing of said body on the neck of the container.
  • the body may also include a centering pin for the spray nozzle, integral with the partition separating the two chambers and arranged in the second chamber.
  • the opening forming a seat for the non-return valve is formed in the partition separating the two chambers; alternatively, it is formed in the side wall of the body at the level of the first chamber.
  • the body is preferably made of rigid plastic material and obtained by molding in one piece.
  • the check valve is preferably a ball valve, but it could also be any other known type of valve. It is, in known manner, connected to a dip tube contained in the container.
  • the piston is a hollow piston and the rod is slidably mounted in the piston.
  • the piston is preferably constituted by a hollow cylinder, carrying a collar provided with a sealing lip and closed at one end by a face capable of receiving the means for actuating the piston; preferably, said face is provided with a vent hole to avoid compressing the air in the hollow cylinder of the piston, when the piston is pressed.
  • the rod carries a lip ensuring the tightness of its sliding inside the piston. It preferably carries a collar with a diameter smaller than that of the chamber on which the elastic return means of the piston bears.
  • the rod is bored and the piston is slidably mounted in the rod.
  • the piston is preferably constituted by a cylindrical part of small diameter so as to be able to penetrate the rod, this cylindrical part being preferably hollow so as to avoid compressing the air in the hollow rod ;
  • the cylindrical part carries a disc having a diameter such that it can slide in leaktight manner in the cylindrical body; the edge of the disc is preferably provided with a sealing lip.
  • the rod has over a part of its length a cylindrical bore opening on the piston side. The upper edge of this bore is preferably provided with a sealing bead.
  • the dispensing head according to the invention may comprise, whatever the variant, a single elastic return means.
  • the latter is then advantageously disposed between the inner surface of the flange or of the piston disc and the flange of the rod.
  • the dispensing head can also include two elastic return means, which makes it possible to dissociate the force necessary to actuate the piston and the force necessary to obtain a higher precompression.
  • elastic means it is preferable to use a spring (s).
  • This air intake can be constituted by any known means, for example by a valve, in particular a ball valve comprising a ball, a spring and a seat, or by a deformable seal and an element capable of deforming said seal.
  • the longitudinal axis of the body containing the two chambers can be arranged parallel or perpendicular to the axis of the spray nozzle.
  • the dispensing head can advantageously be protected by a cap fixed on the container.
  • this cap When this cap is not removable and therefore remains in place during dispensing, it has a window arranged opposite the spray nozzle so as to allow the jet of sprayed liquid to pass.
  • the cap may, then, either be provided with an opening allowing the user to actuate the piston by pressing directly with a finger on the upper part of the piston, or with a lever system actuated manually by the user, lever which rests on the upper part of the piston.
  • the piston At rest, the piston is in the high position, the first chamber is filled with liquid, the needle rests tightly on its seat and the non-return valve keeps communication between the container and the first chamber closed.
  • the user presses the upper part of the piston, either directly or by means of a lever; the piston sinks while compressing the elastic means. This creates a hydraulic pressure inside the first chamber.
  • the needle lifts.
  • the dose of liquid contained in the first chamber passes into the second chamber where it is sprayed by the nozzle.
  • the needle falls back into the opening on its seat.
  • the elastic means s) return (s) the piston to its rest position.
  • a vacuum is created in the first chamber, the non-return valve opens and the liquid is drawn into the container. The set is ready for a new spraying.
  • FIGS. 1 to 4 The assembly shown in FIGS. 1 to 4 is designated as a whole by the reference 1.
  • the container 2 which contains the liquid to be sprayed is made of deformable material. It is provided with an upper wall 21 carrying, in the vicinity of its junction with a cylindrical side wall 24, a cylindrical neck 22 provided with an external screw thread 23. The neck 22 is eccentric relative to the longitudinal axis of the bottle. Furthermore, the side wall 24 of the container 2 comprises, in the vicinity of its junction with the upper wall 21, an annular groove 25.
  • the dispensing head 3 comprises a cylindrical skirt 31, which, according to the embodiment, is provided with an internal thread, capable of cooperating with the external thread 23 of the neck 22. It is quite obvious that the pitch of screws could be replaced by a snap ring in the case of a snap fastening or by a smooth surface in the case of a crimp fixing.
  • the cylindrical skirt 31 is connected, by a plate 32 transverse to the skirt 31, to a body 33 of generally cylindrical shape having a diameter less than that of the skirt 31.
  • the side wall 24, the skirt 31 and the body 33 extend longitudinally along parallel axes.
  • the body 33 defines two coaxial chambers 34 and 35 separated by a transverse partition 39.
  • the upper part (in the position shown in Figures 1 to 4) of the body 33 has an external screw pitch 36 which allows a capsule 5 to be screwed into it.
  • the partition 39 has an opening 37 forming a cylindrical passage between the first chamber 34 and the second chamber 35. At the opening 37, the chamber 35 has a diameter smaller than that of the opening 37. Thus the orifice through which the chamber 35 opens into the opening 37 constitutes a seat for a needle 71 of a rod 7, the role of which will appear below.
  • the partition 39 separating the chambers 34 and 35 is provided with another opening 38 connecting the chamber 34 to the container 2, via a dip tube 10. According to the embodiment shown in FIGS.
  • a non-return ball valve comprises a ball 9 which cooperates with the seat formed by the opening 38, this opening having a frustoconical shape.
  • a hollow cylindrical piston 6 closed on the side facing the outside of the body 33 by a face 61 provided with a vent 64.
  • the piston 6 carries a circular collar 62 provided with a lip d seal 63 cooperating with the inner surface of the chamber 34.
  • the rod 7 is mounted for sealing, by means of a lip 72 with which it is provided, the piston 6 and the rod 7 sliding one in the other.
  • the end of the rod 7, opposite the piston 6, has a conical zone forming the needle 71 which is adapted to close or open the opening 37.
  • the rod 7 carries in the vicinity of the needle 71, above the latter , a flange 73 of diameter smaller than that of the chamber 34.
  • a centering pin 13 fixed to the partition 39 which carries a spray nozzle 11 for the liquid defines with the nozzle 11 an annular spray chamber in communication with the chamber 35.
  • the seal between the neck 22 of the container 2 and the dispensing head 3 is made using an annular seal 12 disposed between the upper edge of the neck 22 and the plate 31.
  • the cylindrical body 33 is closed at the upper part by the capsule 5 which is provided with a circular opening 51, for the passage of the piston 6 and a thread 52 cooperating with the thread 36 of the cylindrical body 33.
  • the dispensing head 3 is protected by the cap 4 which has a lateral skirt 41 provided in the vicinity of its lower edge with an inner bead 42 capable of cooperating with the groove 25 of the container for the snap-fastening of the cap 4 on the container 2.
  • the cap 4 comprises a lever 43, capable of pivoting with respect to a point located on the side skirt 41 of the cap 4, in a vertical plane, and cooperating with the bottom 61 of the piston 6.
  • the contact between the lever 43 and the bottom 61 of the piston is made by means of a spherical bearing 44 which has the lever 43.
  • the side skirt 41 has, opposite the spray nozzle 11, a window 45.
  • the nozzle 11 being fixed, the window 45 has limited dimensions, which improves the aesthetics of the assembly.
  • the operation of the assembly 1 is as follows. At rest, the piston 6 is in the high position, the chamber 34 is filled with liquid, the needle 71 rests in the opening 37 and seals the communication between the chambers 34 and 35 under the action of the spring 8 and the ball 9 of the non-return valve rests in the opening 38 so as to seal the communication between the chamber 34 and the container 2 containing the liquid.
  • the lever 43 When the user wishes to spray the liquid, he presses the lever 43.
  • the piston 6 slides in the chamber 34 on the rod 7 by compressing the spring 8 (see FIG. 2). Hydraulic pressure is thus created inside the chamber 34.
  • FIG. 5 illustrates an assembly 1 a identical to assembly 1 illustrated in FIGS. 1 to 4, except that the dispensing head 3 is not not protected by a cap. Consequently, to carry out the spraying, the user presses with a finger directly on the bottom 61 of the piston 6.
  • FIGS. 6 and 7 represent assemblies 201 and 301, identical to that illustrated in FIGS. 1 to 4, with the exception of the fact that they comprise an air intake device 213, 313 respectively, making it possible to avoid the formation of a depression in the containers 202 and 302 respectively.
  • the containers 202 and 302 can therefore be made of rigid material.
  • the air intake device 213 illustrated in FIG. 6 is placed on the upper wall 221 of the container 202. It should be noted that it could also be placed on the transverse plate 232 of the dispensing head 203.
  • the device 213 is a valve consisting of a ball 213 a of a calibrated spring 213 b , and of a seat 213 c , against which the ball 213 a is pressed in a sealed manner under the action of the spring 213 b when the pressure at l inside the container 2 is equal to atmospheric pressure.
  • the air intake device 313 illustrated in FIG. 7 uses the annular seal 312 ensuring the seal between the edge of the neck 322 and the internal surface of the horizontal plate 332 of the dispensing head 303. It comprises a rod 314, comprising two elements 314 a and 314 b at right angles; the element 314 a extends the upper surface 361 of the piston 306 and the element 314 b is parallel to the axis of the body 333 and perpendicular to the plate 332. The element 314 b penetrates through an opening 315 formed in the plate 332 and comes into contact with the seal 312 ensuring the seal between the neck 322 and the plate 332.
  • the lever 343 is supported by a bearing 344 on the element 314 a of the rod 314.
  • the piston 306 sinks, the element 314 b presses on the seal 312 which deforms until the air enters the container 302 and brings the container 302 back to atmospheric pressure.
  • FIG. 8 illustrates an assembly 401 comprising a dispensing head 403 in which the longitudinal axis of the body 433 is perpendicular to the axis of the neck 422 of the container 402, that is to say horizontal as illustrated in FIG. 8.
  • the wall of the cylindrical body 433 is fixed on the plate 432.
  • the spraying through the nozzle 411 is done parallel to the longitudinal axis of the body 433, the nozzle 411 being disposed in the bottom of the chamber 435.
  • the seat 438 of the non-return ball valve 409 opens in the tray 432 which also constitutes the wall of the body 433 at the level of the chamber 434.
  • the upper wall 421 of the container 402 comprises a flat surface 421 a inclined from above down towards the inside of the container 402 so as to allow the movement of the lever 443 and to limit it. It should be noted that this embodiment makes it possible to reduce the height of the dispensing head.
  • Figures 9 and 10 show an assembly 501 similar to that shown in Figures 1 to 4, except that the piston 506 of the dispensing head 503 is returned by two springs 508 a and 508 b .
  • FIG. 9 represents the assembly 501 at rest and FIG. 10 the assembly 501 during compression.
  • the spring 508 a is disposed between the lower surface of the flange 562 of the piston 506 and the partition 539 forming the bottom of the chamber 534.
  • the spring 508 b is disposed in the piston 506. It connects the inner face of the bottom 561 of the piston 506, at the upper part 572 of the rod 507.
  • the spring 508 a is calibrated so that the force to be exerted to drive the piston into the chamber 534 is as low as possible. However, this spring 508 a must be stiff enough to reassemble the piston quickly.
  • the spring 508 b is calibrated stiffer than the spring 508 a so that the precompression of the liquid is maximum.
  • Figure 11 shows an assembly 601 similar to the assembly shown in Figure 1, except that the piston 606 slides in the rod 607 which is provided with a bore.
  • the piston 606 consists of a cylindrical piece 661, opening at one end in the hollow of the rod 607 and at the other end outside, carrying a disc 662 provided with a sealing lip 663 cooperating with the interior surface of the chamber 634.
  • the rod 607 has a bore 674 in which the cylindrical part 661 of the piston 606 slides. The upper edge of the bore 674 is provided with a sealing bead 672.
  • a spring 608 surrounding the rod 607 bears, on the one hand, on the upper surface of a flange 673 of the rod 607 and, on the other hand, on the surface inside of the disc 662 of the piston 606, thus urging the rod 607 away from the piston 606.
  • FIG. 12 represents an assembly 701 identical to the assembly 601, except that the return means is constituted by two concentric springs 708 a and 708 b .
  • the spring 708 a is supported, on the one hand, on the inner face of the disc 762 of the piston 706 and, on the other hand, on the partition 739 forming the bottom of the chamber 734.
  • the spring 708 b is disposed between the face inside of the disc 762 of the piston 706 and the upper face of the flange 773 of the rod 707.
  • a circular rib 764 disposed on the inside of the disc 762 separates the bearing zones of the springs 708 a and 708 b on said inner face of the disc 762.

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  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Closures For Containers (AREA)
  • Nozzles (AREA)

Abstract

It comprises a dispensing head (3) fixed to a container (2). The dispensing head (3) comprises two chambers (34, 35) aligned along the same longitudinal axis and contained in a single body (33). The two chambers are separated by a transverse partition (39). The first chamber (34) is closed by a piston which is mounted so as to slide with respect to a rod (7). The rod (7) carries, at its end opposite the piston (6), a needle valve (71) having for a seat the opening (37) for communication between the first chamber (34) and the second chamber (35), which opening is made in the partition (39). The first chamber (34) is connected to the container (2) via a non-return valve (9). The second chamber (35) is fitted with a spray nozzle (11) which, being arranged on a fixed wall, is itself fixed. <IMAGE>

Description

La présente invention concerne un ensemble pour la pulvérisation d'un liquide comportant une pompe à précompression.The present invention relates to an assembly for spraying a liquid comprising a precompression pump.

On connaît les ensembles de pulvérisation constitués par un récipient, sur le goulot duquel est fixée une tête de distribution comportant une pompe du type à précompression. Ces ensembles sont utilisés dans de nombreux domaines, notamment en cosmétique, pour la pulvérisation de liquides plus ou moins visqueux pouvant éventuellement avoir la consistance d'une crème ou d'une pâte fluide, en particulier des parfums.There are known spray assemblies constituted by a container, on the neck of which is fixed a dispensing head comprising a pump of the precompression type. These assemblies are used in many fields, in particular in cosmetics, for the spraying of more or less viscous liquids which may possibly have the consistency of a cream or a fluid paste, in particular perfumes.

Les pompes à précompression sont des pompes qui comportent généralement deux chambres : une première chambre dans laquelle le liquide à pulvériser est introduit par l'intermédiaire d'un clapet anti-retour et dans laquelle il est soumis à une précompression à l'aide d'un piston, généralement actionné manuellement de l'extérieur contre l'action d'un dispositif élastique de rappel, et une seconde chambre reliée à une buse de pulvérisation du liquide. La précompression du liquide dans la première chambre est destinée à assurer une bonne qualité de pulvérisation, dès le début de la pulvérisation.Precompression pumps are pumps which generally have two chambers: a first chamber into which the liquid to be sprayed is introduced by means of a non-return valve and into which it is subjected to precompression using a piston, generally manually actuated from the outside against the action of an elastic return device, and a second chamber connected to a nozzle for spraying the liquid. The precompression of the liquid in the first chamber is intended to ensure good quality of spraying, from the start of spraying.

Les pompes utilisées en cosmétique étant généralement de faible dimension, on cherche à fabriquer des pompes comportant le moins possible de pièces. La présente invention concerne un ensemble dans lequel la tête de distribution comportant la pompe contient un nombre réduit de pièces, qui est donc plus facile à monter.As the pumps used in cosmetics are generally of small size, it is sought to manufacture pumps comprising as few parts as possible. The present invention relates to an assembly in which the dispensing head comprising the pump contains a reduced number of parts, which is therefore easier to mount.

La présente invention a pour objet un ensemble de pulvérisation d'un liquide constitué par un récipient contenant le liquide à pulvériser, récipient sur le goulot duquel est fixée une tête de distribution munie d'une pompe à précompression comportant deux chambres : une première chambre, de précompression, fermée par un piston actionné manuellement de l'extérieur contre l'action d'au moins un moyen de rappel élastique , et en communication avec le récipient par l'intermédiaire d'un clapet anti-retour, et une seconde chambre susceptible de communiquer avec la première à la fin de la phase de précompression et comportant une buse de pulvérisation, caractérisé par le fait que les deux chambres sont alignées sur un même axe longitudinal, que les parois des deux chambres sont fixes et constituent un corps unique, que le piston est monté coulissant par rapport à une tige munie d'un pointeau susceptible d'ouvrir et fermer la communication entre les première et seconde chambres, et que la buse de pulvérisation est disposée sur une paroi fixe de la seconde chambre.The subject of the present invention is an assembly for spraying a liquid consisting of a container containing the liquid to be sprayed, container on the neck of which is fixed a dispensing head provided with a precompression pump comprising two chambers: a first chamber, precompression, closed by a piston manually actuated from the outside against the action of at least one elastic return means, and in communication with the container via a non-return valve, and a second chamber capable of to communicate with the first at the end of the precompression phase and comprising a spray nozzle, characterized by the fact that the two chambers are aligned on the same longitudinal axis, that the walls of the two chambers are fixed and constitute a single body, that the piston is mounted to slide relative to a rod provided with a needle capable of opening and close the communication between the first and second chambers, and that the spray nozzle is arranged on a fixed wall of the second chamber.

Ce mode de réalisation permet de diminuer le nombre de pièces nécessaires, car les deux chambres sont contenues dans un même corps. De plus, la buse de pulvérisation est fixe, ce qui limite les dimensions de la fenêtre d'évacuation du jet de liquide pulvérisé lorsque la tête de distribution est recouverte d'un capuchon. On limite ainsi les risques d'intersection entre le jet de liquide pulvérisé et le bord de la fenêtre et, par conséquent, des pertes en liquide pulvérisé.This embodiment makes it possible to reduce the number of parts required, since the two chambers are contained in the same body. In addition, the spray nozzle is fixed, which limits the dimensions of the window for discharging the jet of sprayed liquid when the dispensing head is covered with a cap. This limits the risk of intersection between the spray of liquid spray and the edge of the window and, consequently, losses of sprayed liquid.

Selon la présente invention, la tête de distribution peut donc être montée uniquement à partir des pièces suivantes :

  • un corps unique contenant les deux chambres ;
  • un piston coulissant dans la première chambre ;
  • une tige portant un pointeau montée coulissante par rapport au piston ;
  • au moins un moyen de rappel élastique reliant le piston à la tige ;
  • une buse de pulvérisation disposée dans la paroi du corps au niveau de la seconde chambre,
  • un corps mobile, en particulier une bille, si le clapet anti-retour est un clapet à bille .
According to the present invention, the dispensing head can therefore be mounted only from the following parts:
  • a single body containing the two chambers;
  • a piston sliding in the first chamber;
  • a rod carrying a needle mounted to slide relative to the piston;
  • at least one elastic return means connecting the piston to the rod;
  • a spray nozzle arranged in the wall of the body at the level of the second chamber,
  • a movable body, in particular a ball, if the non-return valve is a ball valve.

La tête de distribution peut également comporter une pièce supplémentaire : une capsule fermant le corps, qui est munie d'une ouverture traversée par le piston, et qui a pour fonction d'éviter que le piston ne puisse sortir du corps.The dispensing head may also include an additional part: a capsule closing the body, which is provided with an opening traversed by the piston, and which has the function of preventing the piston from being able to leave the body.

Le corps a une forme générale cylindrique, les deux chambres étant séparées par une cloison transversale comportant une ouverture formant un passage entre la première chambre et la seconde chambre, l'orifice par lequel la deuxième chambre débouche dans l'ouverture formant siège pour le pointeau et permettant la communication entre les deux chambres. De préférence, le corps contenant les deux chambres porte une jupe permettant la fixation dudit corps sur le goulot du récipient. Le corps peut comporter également un pion de centrage pour la buse de pulvérisation, solidaire de la cloison séparant les deux chambres et disposé dans la seconde chambre.The body has a generally cylindrical shape, the two chambers being separated by a transverse partition comprising an opening forming a passage between the first chamber and the second chamber, the orifice through which the second chamber opens into the opening forming a seat for the needle and allowing communication between the two chambers. Preferably, the body containing the two chambers carries a skirt allowing the fixing of said body on the neck of the container. The body may also include a centering pin for the spray nozzle, integral with the partition separating the two chambers and arranged in the second chamber.

Selon un mode de réalisation du corps, l'ouverture formant siège pour le clapet anti-retour est ménagée dans la cloison séparant les deux chambres ; en variante, elle est ménagée dans la paroi latérale du corps au niveau de la première chambre.According to one embodiment of the body, the opening forming a seat for the non-return valve is formed in the partition separating the two chambers; alternatively, it is formed in the side wall of the body at the level of the first chamber.

Le corps est, de préférence, en matériau plastique rigide et obtenu par moulage d'une seule pièce.The body is preferably made of rigid plastic material and obtained by molding in one piece.

Le clapet anti-retour est, de préférence, un clapet à bille mais il pourrait être également tout autre type de clapet connu. Il est, de façon connue, relié à un tube plongeur contenu dans le récipient.The check valve is preferably a ball valve, but it could also be any other known type of valve. It is, in known manner, connected to a dip tube contained in the container.

Selon une première variante de réalisation, le piston est un piston creux et la tige est montée coulissante dans le piston. Dans ce premier mode de réalisation, le piston est, de préférence, constitué par un cylindre creux, portant une collerette munie d'une lèvre d'étanchéité et fermé à une extrémité par une face apte à recevoir le moyen d'actionnement du piston ; de préférence, ladite face est munie d'un trou d'évent pour éviter de comprimer l'air dans le cylindre creux du piston, lors de l'enfoncement du piston. La tige porte une lèvre assurant l'étanchéité de son coulissement à l'intérieur du piston. Elle porte, de préférence, une collerette de diamètre inférieur à celui de la chambre sur laquelle prend appui le moyen élastique de rappel du piston.According to a first alternative embodiment, the piston is a hollow piston and the rod is slidably mounted in the piston. In this first embodiment, the piston is preferably constituted by a hollow cylinder, carrying a collar provided with a sealing lip and closed at one end by a face capable of receiving the means for actuating the piston; preferably, said face is provided with a vent hole to avoid compressing the air in the hollow cylinder of the piston, when the piston is pressed. The rod carries a lip ensuring the tightness of its sliding inside the piston. It preferably carries a collar with a diameter smaller than that of the chamber on which the elastic return means of the piston bears.

Selon une seconde variante de réalisation, la tige est alésée et le piston est monté coulissant dans la tige. Dans ce mode de réalisation, le piston est, de préférence, constitué par une pièce cylindrique de faible diamètre de façon à pouvoir pénétrer dans la tige, cette pièce cylindrique étant de préférence creuse de façon à éviter de comprimer l'air dans la tige creuse ; la pièce cylindrique porte un disque ayant un diamètre tel qu'il puisse coulisser de façon étanche dans le corps cylindrique ; le bord du disque est, de préférence, muni d'une lèvre d'étanchéité. La tige comporte sur une partie de sa longueur un alésage cylindrique s'ouvrant côté piston. Le bord supérieur de cet alésage est, de préférence, muni d'un bourrelet d'étanchéité.According to a second alternative embodiment, the rod is bored and the piston is slidably mounted in the rod. In this embodiment, the piston is preferably constituted by a cylindrical part of small diameter so as to be able to penetrate the rod, this cylindrical part being preferably hollow so as to avoid compressing the air in the hollow rod ; the cylindrical part carries a disc having a diameter such that it can slide in leaktight manner in the cylindrical body; the edge of the disc is preferably provided with a sealing lip. The rod has over a part of its length a cylindrical bore opening on the piston side. The upper edge of this bore is preferably provided with a sealing bead.

La tête de distribution selon l'invention peut comporter quelle que soit la variante un seul moyen élastique de rappel. Celui-ci est alors, avantageusement, disposé entre la surface intérieure de la collerette ou du disque du piston et la collerette de la tige.The dispensing head according to the invention may comprise, whatever the variant, a single elastic return means. The latter is then advantageously disposed between the inner surface of the flange or of the piston disc and the flange of the rod.

La tête de distribution peut également comporter deux moyens élastiques de rappel, ce qui permet de dissocier la force nécessaire pour actionner le piston et la force nécessaire pour obtenir une précompression plus élevée. Comme moyen(s) élastique(s), on utilise, de préférence, un (des) ressort(s).The dispensing head can also include two elastic return means, which makes it possible to dissociate the force necessary to actuate the piston and the force necessary to obtain a higher precompression. As elastic means, it is preferable to use a spring (s).

Lorsque le récipient contenant le liquide est un récipient rigide, il est nécessaire que l'ensemble comporte une reprise d'air. Cette reprise d'air peut être constituée par tout moyen connu, par exemple par un clapet, en particulier un clapet à bille comportant une bille, un ressort et un siège, ou par un joint déformable et un élément apte à déformer ledit joint.When the container containing the liquid is a rigid container, it is necessary for the assembly to include an air intake. This air intake can be constituted by any known means, for example by a valve, in particular a ball valve comprising a ball, a spring and a seat, or by a deformable seal and an element capable of deforming said seal.

L'axe longitudinal du corps contenant les deux chambres peut être disposé parallèlement ou perpendiculairement à l'axe de la buse de pulvérisation.The longitudinal axis of the body containing the two chambers can be arranged parallel or perpendicular to the axis of the spray nozzle.

La tête de distribution peut être avantageusement protégée par un capuchon fixé sur le récipient. Lorsque ce capuchon n'est pas amovible et reste, par conséquent, en place pendant la distribution, il comporte une fenêtre disposée au vis-à-vis de la buse de pulvérisation de façon à permettre le passage du jet de liquide pulvérisé. Le capuchon peut, alors, soit être muni d'une ouverture permettant à l'utilisateur d'actionner le piston en appuyant directement avec un doigt sur la partie supérieure du piston, soit d'un système de levier actionné manuellement par l'utilisateur, levier qui prend appui sur la partie supérieure du piston.The dispensing head can advantageously be protected by a cap fixed on the container. When this cap is not removable and therefore remains in place during dispensing, it has a window arranged opposite the spray nozzle so as to allow the jet of sprayed liquid to pass. The cap may, then, either be provided with an opening allowing the user to actuate the piston by pressing directly with a finger on the upper part of the piston, or with a lever system actuated manually by the user, lever which rests on the upper part of the piston.

Le système fonctionne de la façon suivante :The system works as follows:

Au repos, le piston est en position haute, la première chambre est remplie de liquide, le pointeau repose de façon étanche sur son siège et le clapet anti-retour maintient fermée la communication entre le récipient et la première chambre.At rest, the piston is in the high position, the first chamber is filled with liquid, the needle rests tightly on its seat and the non-return valve keeps communication between the container and the first chamber closed.

Pour actionner l'ensemble de pulvérisation, l'utilisateur appuie sur la partie supérieure du piston, soit directement, soit par l'intermédiaire d'un levier ; le piston s'enfonce en comprimant le moyen élastique. On crée ainsi une pression hydraulique à l'intérieur de la première chambre.To activate the spraying assembly, the user presses the upper part of the piston, either directly or by means of a lever; the piston sinks while compressing the elastic means. This creates a hydraulic pressure inside the first chamber.

Lorsque la somme de l'effort sur la tige dû à la pression dans la première chambre appliquée à la face supérieure de la collerette et de la lèvre d'étanchéité et de l'effort dû au ressort devient inférieure à l'effort sur la tige dû à la pression dans la première chambre appliquée à la section d'étanchéité de la lèvre, le pointeau se soulève. La dose de liquide contenue dans la première chambre passe dans la seconde chambre où elle est pulvérisée par la buse. Lorsque la première chambre est vide, le pointeau retombe dans l'ouverture sur son siège. Lorsque l'utilisateur cesse d'appuyer sur le piston, le(s) moyen(s) élastique(s) ramène(nt) le piston dans sa position de repos. Il se crée une dépression dans la première chambre, le clapet anti-retour s'ouvre et le liquide est aspiré dans le récipient. L'ensemble est prêt pour une nouvelle pulvérisation.When the sum of the force on the rod due to the pressure in the first chamber applied to the upper face of the collar and of the sealing lip and the force due to the spring becomes less than the force on the rod due to the pressure in the first chamber applied to the sealing section of the lip, the needle lifts. The dose of liquid contained in the first chamber passes into the second chamber where it is sprayed by the nozzle. When the first chamber is empty, the needle falls back into the opening on its seat. When the user stops pressing the piston, the elastic means (s) return (s) the piston to its rest position. A vacuum is created in the first chamber, the non-return valve opens and the liquid is drawn into the container. The set is ready for a new spraying.

La description donnée ci-après, à titre illustratif et non limitatif, avec référence aux dessins annexés, permettra de mieux comprendre l'invention.The description given below, by way of illustration and without limitation, with reference to the appended drawings, will allow a better understanding of the invention.

Sur ces dessins :

  • les figures 1 à 4 sont des vues, en coupe longitudinale, d'un ensemble selon l'invention dans lequel l'axe longitudinal du corps contenant les deux chambres est parallèle à l'axe de la buse de pulvérisation et qui ne comporte qu'un seul moyen élastique de rappel, l'ensemble étant représenté à différents stades du processus de pulvérisation ;
  • la figure 5 représente un ensemble identique à celui des figures 1 à 4 mais ne comportant pas de capuchon ;
  • la figure 6 représente, en coupe longitudinale, un ensemble selon l'invention du type des figures 1 à 4 mais comportant en plus une valve de reprise d'air ;
  • la figure 7 représente, en coupe longitudinale, une variante de l'ensemble de la figure 6 ;
  • la figure 8 représente, en coupe longitudinale, un ensemble dans lequel l'axe longitudinal des deux chambres est perpendiculaire à l'axe de la buse de pulvérisation ;
  • les figures 9 et 10 représentent, en coupe longitudinale, un ensemble selon l'invention du type de celui des figures 1 à 4 mais comportant deux moyens élastiques de rappel, à différents stades de la phase de pulvérisation.
  • les figures 11-12 représentent en coupe longitudinale, des ensembles dans lesquels la tige est munie d'un alésage et le piston coulisse dans la tige ; l'ensemble représenté sur la figure 11 comporte un moyen élastique de rappel et celui représenté sur la figure 12 comporte deux moyens élastiques de rappel.
In these drawings:
  • FIGS. 1 to 4 are views, in longitudinal section, of an assembly according to the invention in which the longitudinal axis of the body containing the two chambers is parallel to the axis of the spray nozzle and which only comprises a single elastic return means, the assembly being represented at different stages of the spraying process;
  • FIG. 5 represents an assembly identical to that of FIGS. 1 to 4 but not comprising a cap;
  • Figure 6 shows, in longitudinal section, an assembly according to the invention of the type of Figures 1 to 4 but further comprising an air return valve;
  • Figure 7 shows, in longitudinal section, a variant of the assembly of Figure 6;
  • FIG. 8 represents, in longitudinal section, an assembly in which the longitudinal axis of the two chambers is perpendicular to the axis of the spray nozzle;
  • Figures 9 and 10 show, in longitudinal section, an assembly according to the invention of the type of that of Figures 1 to 4 but comprising two elastic return means, at different stages of the spraying phase.
  • Figures 11-12 show in longitudinal section, assemblies in which the rod is provided with a bore and the piston slides in the rod; the assembly shown in FIG. 11 comprises an elastic return means and that shown in FIG. 12 comprises two elastic return means.

L'ensemble représenté sur les figures 1 à 4 est désigné dans son ensemble par la référence 1.The assembly shown in FIGS. 1 to 4 is designated as a whole by the reference 1.

Il est composé d'un récipient 2, d'une tête de distribution 3 et d'un capuchon 4. Le récipient 2 qui contient le liquide à pulvériser est en matériau déformable. Il est muni d'une paroi supérieure 21 portant, au voisinage de sa jonction avec une paroi latérale 24 cylindrique, un goulot cylindrique 22 muni d'un pas de vis externe 23. Le goulot 22 est excentré par rapport à l'axe longitudinal du flacon. Par ailleurs, la paroi latérale 24 du récipient 2 comporte, au voisinage de sa jonction avec la paroi supérieure 21, une rainure annulaire 25.It consists of a container 2, a dispensing head 3 and a cap 4. The container 2 which contains the liquid to be sprayed is made of deformable material. It is provided with an upper wall 21 carrying, in the vicinity of its junction with a cylindrical side wall 24, a cylindrical neck 22 provided with an external screw thread 23. The neck 22 is eccentric relative to the longitudinal axis of the bottle. Furthermore, the side wall 24 of the container 2 comprises, in the vicinity of its junction with the upper wall 21, an annular groove 25.

La tête de distribution 3 comporte une jupe cylindrique 31, qui, selon le mode de réalisation, est munie d'un pas de vis interne, susceptible de coopérer avec le pas de vis externe 23 du goulot 22. Il est bien évident que le pas de vis pourrait être remplacé par un jonc d'accrochage dans le cas d'une fixation par claquage ou par une surface lisse dans le cas d'une fixation par sertissage. La jupe cylindrique 31 est reliée, par un plateau 32 transversal par rapport à la jupe 31, à un corps 33 de forme générale cylindrique ayant un diamètre inférieur à celui de la jupe 31. La paroi latérale 24, la jupe 31 et le corps 33 s'étendent longitudinalement suivant des axes parallèles. Le corps 33 définit deux chambres 34 et 35 coaxiales séparées par une cloison 39 transversale. La partie supérieure (dans la position représentée sur les figures 1 à 4) du corps 33 comporte un pas de vis externe 36 qui permet d'y visser une capsule 5. La cloison 39 comporte une ouverture 37 formant un passage cylindrique entre la première chambre 34 et la seconde chambre 35. Au niveau de l'ouverture 37, la chambre 35 a un diamètre inférieur à celui de l'ouverture 37. Ainsi l'orifice par lequel la chambre 35 débouche dans l'ouverture 37 constitue un siège pour un pointeau 71 d'une tige 7, dont le rôle apparaîtra ci-dessous. La cloison 39 séparant les chambres 34 et 35 est munie d'une autre ouverture 38 reliant la chambre 34 au récipient 2, par l'intermédiaire d'un tube plongeur 10. Selon le mode de réalisation représenté sur les figures 1 à 4, un clapet anti-retour à bille comporte une bille 9 qui coopère avec le siège constitué par l'ouverture 38, cette ouverture ayant une forme tronconique. Dans la première chambre 34, est monté un piston 6 cylindrique creux, fermé du côté tourné vers l'extérieur du corps 33 par une face 61 munie d'un évent 64. Le piston 6 porte une collerette circulaire 62 munie d'une lèvre d'étanchéité 63 coopérant avec la surface intérieure de la chambre 34. A l'intérieur du piston 6, la tige 7 est montée à étanchéité, grâce à une lèvre 72 dont elle est munie, le piston 6 et la tige 7 coulissant l'un dans l'autre. L'extrémité de la tige 7, opposée au piston 6, comporte une zone conique formant le pointeau 71 qui est adaptée à fermer ou ouvrir l'ouverture 37. La tige 7 porte au voisinage du pointeau 71, au-dessus de celui-ci, une collerette 73 de diamètre inférieur à celui de la chambre 34.The dispensing head 3 comprises a cylindrical skirt 31, which, according to the embodiment, is provided with an internal thread, capable of cooperating with the external thread 23 of the neck 22. It is quite obvious that the pitch of screws could be replaced by a snap ring in the case of a snap fastening or by a smooth surface in the case of a crimp fixing. The cylindrical skirt 31 is connected, by a plate 32 transverse to the skirt 31, to a body 33 of generally cylindrical shape having a diameter less than that of the skirt 31. The side wall 24, the skirt 31 and the body 33 extend longitudinally along parallel axes. The body 33 defines two coaxial chambers 34 and 35 separated by a transverse partition 39. The upper part (in the position shown in Figures 1 to 4) of the body 33 has an external screw pitch 36 which allows a capsule 5 to be screwed into it. The partition 39 has an opening 37 forming a cylindrical passage between the first chamber 34 and the second chamber 35. At the opening 37, the chamber 35 has a diameter smaller than that of the opening 37. Thus the orifice through which the chamber 35 opens into the opening 37 constitutes a seat for a needle 71 of a rod 7, the role of which will appear below. The partition 39 separating the chambers 34 and 35 is provided with another opening 38 connecting the chamber 34 to the container 2, via a dip tube 10. According to the embodiment shown in FIGS. 1 to 4, a non-return ball valve comprises a ball 9 which cooperates with the seat formed by the opening 38, this opening having a frustoconical shape. In the first chamber 34, is mounted a hollow cylindrical piston 6, closed on the side facing the outside of the body 33 by a face 61 provided with a vent 64. The piston 6 carries a circular collar 62 provided with a lip d seal 63 cooperating with the inner surface of the chamber 34. Inside the piston 6, the rod 7 is mounted for sealing, by means of a lip 72 with which it is provided, the piston 6 and the rod 7 sliding one in the other. The end of the rod 7, opposite the piston 6, has a conical zone forming the needle 71 which is adapted to close or open the opening 37. The rod 7 carries in the vicinity of the needle 71, above the latter , a flange 73 of diameter smaller than that of the chamber 34.

Un ressort 8, entourant le piston 6 et la tige 7, relie la tige 7 au piston 6. Il prend appui sur la surface inférieure de la collerette 62 du piston 6 et sur la surface supérieure de la collerette 73 de la tige 7, sollicitant ainsi la tige 7 en éloignement du piston 6.A spring 8, surrounding the piston 6 and the rod 7, connects the rod 7 to the piston 6. It bears on the lower surface of the collar 62 of the piston 6 and on the upper surface of the collar 73 of the rod 7, urging thus the rod 7 away from the piston 6.

Un pion de centrage 13 fixé à la cloison 39 qui porte une buse de pulvérisation 11 du liquide définit avec la buse 11 une chambre annulaire de pulvérisation en communication avec la chambre 35.A centering pin 13 fixed to the partition 39 which carries a spray nozzle 11 for the liquid defines with the nozzle 11 an annular spray chamber in communication with the chamber 35.

L'étanchéité entre le goulot 22 du récipient 2 et la tête de distribution 3 est faite à l'aide d'un joint annulaire 12 disposé entre le bord supérieur du goulot 22 et le plateau 31.The seal between the neck 22 of the container 2 and the dispensing head 3 is made using an annular seal 12 disposed between the upper edge of the neck 22 and the plate 31.

Le corps cylindrique 33 est fermé à la partie supérieure par la capsule 5 qui est munie d'une ouverture circulaire 51, pour le passage du piston 6 et d'un pas de vis 52 coopérant avec le pas de vis 36 du corps cylindrique 33.The cylindrical body 33 is closed at the upper part by the capsule 5 which is provided with a circular opening 51, for the passage of the piston 6 and a thread 52 cooperating with the thread 36 of the cylindrical body 33.

La tête de distribution 3 est protégée par le capuchon 4 qui comporte une jupe latérale 41 munie au voisinage de son bord inférieur d'un bourrelet intérieur 42 susceptible de coopérer avec la rainure 25 du récipient pour la fixation par claquage du capuchon 4 sur le récipient 2. Le capuchon 4 comporte un levier 43, susceptible de pivoter par rapport à un point situé sur la jupe latérale 41 du capuchon 4, dans un plan vertical, et coopérant avec le fond 61 du piston 6. Le contact entre le levier 43 et le fond 61 du piston se fait par l'intermédiaire d'une portée sphérique 44 que présente le levier 43. La jupe latérale 41 comporte, au vis-à-vis de la buse de pulvérisation 11, une fenêtre 45. La buse 11 de pulvérisation étant fixe, la fenêtre 45 a des dimensions limitées, ce qui améliore l'esthétique de l'ensemble.The dispensing head 3 is protected by the cap 4 which has a lateral skirt 41 provided in the vicinity of its lower edge with an inner bead 42 capable of cooperating with the groove 25 of the container for the snap-fastening of the cap 4 on the container 2. The cap 4 comprises a lever 43, capable of pivoting with respect to a point located on the side skirt 41 of the cap 4, in a vertical plane, and cooperating with the bottom 61 of the piston 6. The contact between the lever 43 and the bottom 61 of the piston is made by means of a spherical bearing 44 which has the lever 43. The side skirt 41 has, opposite the spray nozzle 11, a window 45. The nozzle 11 being fixed, the window 45 has limited dimensions, which improves the aesthetics of the assembly.

Le fonctionnement de l'ensemble 1 est le suivant. Au repos, le piston 6 est en position haute, la chambre 34 est remplie de liquide, le pointeau 71 repose dans l'ouverture 37 et ferme de façon étanche la communication entre les chambre 34 et 35 sous l'action du ressort 8 et la bille 9 du clapet anti-retour repose dans l'ouverture 38 de façon à fermer de façon étanche la communication entre la chambre 34 et le récipient 2 contenant le liquide. Lorsque l'utilisateur désire pulvériser le liquide, il appuie sur le levier 43. Le piston 6 coulisse dans la chambre 34 sur la tige 7 en comprimant le ressort 8 (voir figure 2). On crée ainsi une pression hydraulique à l'intérieur de la chambre 34.The operation of the assembly 1 is as follows. At rest, the piston 6 is in the high position, the chamber 34 is filled with liquid, the needle 71 rests in the opening 37 and seals the communication between the chambers 34 and 35 under the action of the spring 8 and the ball 9 of the non-return valve rests in the opening 38 so as to seal the communication between the chamber 34 and the container 2 containing the liquid. When the user wishes to spray the liquid, he presses the lever 43. The piston 6 slides in the chamber 34 on the rod 7 by compressing the spring 8 (see FIG. 2). Hydraulic pressure is thus created inside the chamber 34.

Lorsque la somme de l'effort sur la tige 7 dû à la pression dans la chambre 34 appliquée à la face 73a, à la section de la lèvre 72 et de l'effort dû au ressort 8, devient inférieure à l'effort sur la tige 7 dû à la pression dans la chambre 34 appliquée à la face 73b, le pointeau 71 se soulève. La dose de liquide contenue dans la chambre 34 passe dans la chambre 35 où elle est pulvérisée par la buse 11 (voir figure 3). Lorsque la chambre 34 est vide, le pointeau 71 retombe dans l'ouverture 37 sur son siège.When the sum of the force on the rod 7 due to the pressure in the chamber 34 applied to the face 73 a , in the section of the lip 72 and the force due to the spring 8, becomes less than the force on the rod 7 due to the pressure in the chamber 34 applied to the face 73 b , the needle 71 is raised. The dose of liquid contained in the chamber 34 passes into the chamber 35 where it is sprayed by the nozzle 11 (see FIG. 3). When the chamber 34 is empty, the needle 71 falls back into the opening 37 on its seat.

Lorsque l'utilisateur cesse d'appuyer sur le levier, le piston 6 remonte sous l'action du ressort 8 (voir figure 4). Il se crée une dépression à l'intérieur de la chambre 34, la bille 9 du clapet anti-retour se soulève de son siège 38 et vient se plaquer sous la collerette 73. Le liquide contenu dans le récipient 2 est aspiré dans la chambre 34 par l'intermédiaire du tube plongeur 10. Lorsque la chambre 34 est pleine, la bille 9 retombe sur son siège 38.When the user stops pressing the lever, the piston 6 rises under the action of the spring 8 (see FIG. 4). A vacuum is created inside the chamber 34, the ball 9 of the non-return valve is lifted from its seat 38 and is pressed against the flange 73. The liquid contained in the container 2 is drawn into the chamber 34 via the dip tube 10. When the chamber 34 is full, the ball 9 falls back onto its seat 38.

La figure 5 illustre un ensemble 1a identique à l'ensemble 1 illustré sur les figures 1 à 4, sauf que la tête de distribution 3 n'est pas protégée par un capuchon. Par conséquent, pour effectuer la pulvérisation, l'utilisateur appuie avec un doigt directement sur le fond 61 du piston 6.FIG. 5 illustrates an assembly 1 a identical to assembly 1 illustrated in FIGS. 1 to 4, except that the dispensing head 3 is not not protected by a cap. Consequently, to carry out the spraying, the user presses with a finger directly on the bottom 61 of the piston 6.

Les figures 6 et 7 représentent des ensembles 201 et 301, identiques à celui illustré sur les figures 1 à 4, à l'exception du fait qu'ils comportent un dispositif de reprise d'air 213, 313 respectivement, permettant d'éviter la formation d'une dépression dans les récipients 202 et 302 respectivement. Les récipients 202 et 302 peuvent donc être en matériau rigide.FIGS. 6 and 7 represent assemblies 201 and 301, identical to that illustrated in FIGS. 1 to 4, with the exception of the fact that they comprise an air intake device 213, 313 respectively, making it possible to avoid the formation of a depression in the containers 202 and 302 respectively. The containers 202 and 302 can therefore be made of rigid material.

Le dispositif de reprise d'air 213 illustré sur la figure 6 est disposé sur la paroi supérieure 221 du récipient 202. Il faut noter qu'il pourrait également être disposé sur le plateau transversal 232 de la tête de distribution 203. Le dispositif 213 est un clapet constitué d'une bille 213a d'un ressort calibré 213b, et d'un siège 213c, contre lequel la bille 213a s'appuie de façon étanche sous l'action du ressort 213b lorsque la pression à l'intérieur du récipient 2 est égale à la pression atmosphérique.The air intake device 213 illustrated in FIG. 6 is placed on the upper wall 221 of the container 202. It should be noted that it could also be placed on the transverse plate 232 of the dispensing head 203. The device 213 is a valve consisting of a ball 213 a of a calibrated spring 213 b , and of a seat 213 c , against which the ball 213 a is pressed in a sealed manner under the action of the spring 213 b when the pressure at l inside the container 2 is equal to atmospheric pressure.

Le dispositif de reprise d'air 313 illustré sur la figure 7 utilise le joint annulaire 312 assurant l'étanchéité entre le bord du goulot 322 et la surface interne du plateau horizontal 332 de la tête de distribution 303. Il comporte une tige 314, comportant deux éléments 314a et 314b à angle droit; l'élément 314a prolonge la surface supérieure 361 du piston 306 et l'élément 314b est parallèle à l'axe du corps 333 et perpendiculaire au plateau 332. L'élément 314b pénètre par une ouverture 315 ménagée dans le plateau 332 et vient en contact avec le joint 312 assurant l'étanchéité entre le goulot 322 et le plateau 332.The air intake device 313 illustrated in FIG. 7 uses the annular seal 312 ensuring the seal between the edge of the neck 322 and the internal surface of the horizontal plate 332 of the dispensing head 303. It comprises a rod 314, comprising two elements 314 a and 314 b at right angles; the element 314 a extends the upper surface 361 of the piston 306 and the element 314 b is parallel to the axis of the body 333 and perpendicular to the plate 332. The element 314 b penetrates through an opening 315 formed in the plate 332 and comes into contact with the seal 312 ensuring the seal between the neck 322 and the plate 332.

Le levier 343 prend appui par une portée 344 sur l'élément 314a de la tige 314. Lorsque l'utilisateur appuie sur le levier 343, le piston 306 s'enfonce, l'élément 314b appuie sur le joint 312 qui se déforme jusqu'à ce que l'air pénètre dans le récipient 302 et ramène le récipient 302 à la pression atmosphérique.The lever 343 is supported by a bearing 344 on the element 314 a of the rod 314. When the user presses the lever 343, the piston 306 sinks, the element 314 b presses on the seal 312 which deforms until the air enters the container 302 and brings the container 302 back to atmospheric pressure.

La figure 8 illustre un ensemble 401 comportant une tête de distribution 403 dans laquelle l'axe longitudinal du corps 433 est perpendiculaire à l'axe du goulot 422 du récipient 402, c'est-à-dire horizontal comme illustré sur la figure 8. La paroi du corps cylindrique 433 est fixée sur la plateau 432. La pulvérisation à travers la buse 411 se fait parallèlement à l'axe longitudinal du corps 433, la buse 411 étant disposée dans le fond de la chambre 435. Le siège 438 du clapet anti-retour à bille 409 s'ouvre dans le plateau 432 qui constitue également la paroi du corps 433 au niveau de la chambre 434. Dans le mode de réalisation illustré sur la figure 8, la paroi supérieure 421 du récipient 402 comporte une surface plane 421a inclinée de haut en bas vers l'intérieur du récipient 402 de façon à permettre le débattement du levier 443 et à le limiter. Il faut noter que ce mode de réalisation permet de diminuer la hauteur de la tête de distribution.FIG. 8 illustrates an assembly 401 comprising a dispensing head 403 in which the longitudinal axis of the body 433 is perpendicular to the axis of the neck 422 of the container 402, that is to say horizontal as illustrated in FIG. 8. The wall of the cylindrical body 433 is fixed on the plate 432. The spraying through the nozzle 411 is done parallel to the longitudinal axis of the body 433, the nozzle 411 being disposed in the bottom of the chamber 435. The seat 438 of the non-return ball valve 409 opens in the tray 432 which also constitutes the wall of the body 433 at the level of the chamber 434. In the embodiment illustrated in FIG. 8, the upper wall 421 of the container 402 comprises a flat surface 421 a inclined from above down towards the inside of the container 402 so as to allow the movement of the lever 443 and to limit it. It should be noted that this embodiment makes it possible to reduce the height of the dispensing head.

Les figures 9 et 10 représentent un ensemble 501 analogue à celui représenté sur les figures 1 à 4, sauf que le piston 506 de la tête de distribution 503 est rappelé par deux ressorts 508a et 508b.Figures 9 and 10 show an assembly 501 similar to that shown in Figures 1 to 4, except that the piston 506 of the dispensing head 503 is returned by two springs 508 a and 508 b .

La figure 9 représente l'ensemble 501 au repos et la figure 10 l'ensemble 501 en cours de compression.FIG. 9 represents the assembly 501 at rest and FIG. 10 the assembly 501 during compression.

Le ressort 508a est disposé entre la surface inférieure de la collerette 562 du piston 506 et la cloison 539 formant le fond de la chambre 534. Le ressort 508b est disposé dans le piston 506. Il relie la face intérieure du fond 561 du piston 506, à la partie supérieure 572 de la tige 507. Le ressort 508a est taré pour que la force à exercer pour enfoncer le piston dans la chambre 534 soit aussi faible que possible. Cependant ce ressort 508a doit être suffisamment raide pour remonter le piston rapidement. Le ressort 508b est taré plus raide que le ressort 508a afin que la précompression du liquide soit maximale.The spring 508 a is disposed between the lower surface of the flange 562 of the piston 506 and the partition 539 forming the bottom of the chamber 534. The spring 508 b is disposed in the piston 506. It connects the inner face of the bottom 561 of the piston 506, at the upper part 572 of the rod 507. The spring 508 a is calibrated so that the force to be exerted to drive the piston into the chamber 534 is as low as possible. However, this spring 508 a must be stiff enough to reassemble the piston quickly. The spring 508 b is calibrated stiffer than the spring 508 a so that the precompression of the liquid is maximum.

La figure 11 représente un ensemble 601 analogue à l'ensemble représenté sur la figure 1, sauf que le piston 606 coulisse dans la tige 607 qui est munie d'un alésage. Le piston 606 est constitué d'une pièce cylindrique 661, s'ouvrant à une extrémité dans le creux de la tige 607 et à l'autre extrémité à l'extérieur, portant un disque 662 muni d'une lèvre d'étanchéité 663 coopérant avec la surface intérieure de la chambre 634. La tige 607 comporte un alésage 674 dans lequel coulisse la pièce cylindrique 661 du piston 606. Le bord supérieur de l'alésage 674 est muni d'un bourrelet d'étanchéité 672. Un ressort 608 entourant la tige 607 prend appui, d'une part, sur la surface supérieure d'une collerette 673 de la tige 607 et, d'autre part, sur la surface intérieure du disque 662 du piston 606, sollicitant ainsi la tige 607 en éloignement du piston 606.Figure 11 shows an assembly 601 similar to the assembly shown in Figure 1, except that the piston 606 slides in the rod 607 which is provided with a bore. The piston 606 consists of a cylindrical piece 661, opening at one end in the hollow of the rod 607 and at the other end outside, carrying a disc 662 provided with a sealing lip 663 cooperating with the interior surface of the chamber 634. The rod 607 has a bore 674 in which the cylindrical part 661 of the piston 606 slides. The upper edge of the bore 674 is provided with a sealing bead 672. A spring 608 surrounding the rod 607 bears, on the one hand, on the upper surface of a flange 673 of the rod 607 and, on the other hand, on the surface inside of the disc 662 of the piston 606, thus urging the rod 607 away from the piston 606.

La figure 12 représente un ensemble 701 identique à l'ensemble 601, sauf que le moyen de rappel est constitué par deux ressorts concentriques 708a et 708b. Le ressort 708a prend appui, d'une part, sur la face intérieure du disque 762 du piston 706 et, d'autre part, sur la cloison 739 formant le fond de la chambre 734. Le ressort 708b est disposé entre la face intérieure du disque 762 du piston 706 et la face supérieure de la collerette 773 de la tige 707. Une côte circulaire 764 disposée sur la face intérieure du disque 762 sépare les zones de portée des ressorts 708a et 708b sur ladite face intérieure du disque 762.FIG. 12 represents an assembly 701 identical to the assembly 601, except that the return means is constituted by two concentric springs 708 a and 708 b . The spring 708 a is supported, on the one hand, on the inner face of the disc 762 of the piston 706 and, on the other hand, on the partition 739 forming the bottom of the chamber 734. The spring 708 b is disposed between the face inside of the disc 762 of the piston 706 and the upper face of the flange 773 of the rod 707. A circular rib 764 disposed on the inside of the disc 762 separates the bearing zones of the springs 708 a and 708 b on said inner face of the disc 762.

Claims (17)

1 - Ensemble de pulvérisation d'un liquide constitué par un récipient (2) contenant le liquide à pulvériser, récipient (2) sur le goulot (22) duquel est fixée une tête de distribution (3) comportant une pompe à précompression comportant deux chambres (34, 35) : une première chambre de précompression (34), fermée par un piston (6) actionné manuellement de l'extérieur contre l'action d'au moins un moyen de rappel élastique (8), et en communication avec le récipient (2) par l'intermédiaire d'un clapet anti-retour, et une seconde chambre (35) susceptible de communiquer avec la première chambre (34) à la fin de la phase de précompression et comportant une buse de pulvérisation (11), caractérisé par le fait que les deux chambres (34, 35) sont alignées sur un même axe longitudinal, que les parois des deux chambres (34, 35) sont fixes et constituent un corps unique (33), que le piston (6) est monté coulissant par rapport à une tige (7) munie d'un pointeau (71) susceptible d'ouvrir et fermer la communication entre les première et seconde chambres, et que la buse de pulvérisation (11) est disposée sur une paroi fixe de la seconde chambre (35). 1 - assembly for spraying a liquid consisting of a container (2) containing the liquid to be sprayed, container (2) on the neck (22) of which is fixed a dispensing head (3) comprising a precompression pump comprising two chambers (34, 35): a first precompression chamber (34), closed by a piston (6) manually actuated from the outside against the action of at least one elastic return means (8), and in communication with the container (2) by means of a non-return valve, and a second chamber (35) capable of communicating with the first chamber (34) at the end of the precompression phase and comprising a spray nozzle (11) , characterized in that the two chambers (34, 35) are aligned on the same longitudinal axis, that the walls of the two chambers (34, 35) are fixed and constitute a single body (33), that the piston (6) is slidably mounted relative to a rod (7) provided with a needle (71) susce ptible to open and close the communication between the first and second chambers, and that the spray nozzle (11) is disposed on a fixed wall of the second chamber (35). 2 - Ensemble selon la revendication 1, caractérisé par le fait que la tête de distribution (3) comporte une capsule (5) fermant le corps (33) et munie d'une ouverture (51) traversée par le piston (6). 2 - assembly according to claim 1, characterized in that the dispensing head (3) comprises a capsule (5) closing the body (33) and provided with an opening (51) through which the piston (6). 3 - Ensemble selon l'une des revendications 1 ou 2, caractérisé par le fait que le corps (33) contenant les deux chambres (34, 35) présente une jupe (31) permettant la fixation dudit corps (33) sur le goulot (22) du récipient (2), le corps (33) ayant une forme générale cylindrique et les deux chambres (34, 35) étant séparées par une cloison transversale (39) dans laquelle est ménagée une ouverture (37) formant un passage entre la première chambre (34) et la seconde chambre (35), l'orifice par lequel la deuxième chambre (35) débouche dans l'ouverture (37) formant siège pour le pointeau (71) de la tige (7). 3 - assembly according to one of claims 1 or 2, characterized in that the body (33) containing the two chambers (34, 35) has a skirt (31) allowing the fixing of said body (33) on the neck ( 22) of the container (2), the body (33) having a generally cylindrical shape and the two chambers (34, 35) being separated by a transverse partition (39) in which is formed an opening (37) forming a passage between the first chamber (34) and the second chamber (35), the orifice through which the second chamber (35) opens into the opening (37) forming a seat for the needle (71) of the rod (7). 4 - Ensemble selon l'une des revendications 1 à 3, caractérisé par le fait que le piston (6) est creux et la tige (7) est montée coulissante dans le piston (6). 4 - Assembly according to one of claims 1 to 3, characterized in that the piston (6) is hollow and the rod (7) is slidably mounted in the piston (6). 5 - Ensemble selon la revendication 4, caractérisé par le fait que le piston (6) est un cylindre creux portant une collerette (62) munie d'une lèvre d'étanchéité (63) et fermé à une extrémité par une face (61) apte à recevoir le moyen d'actionnement du piston (6). 5 - assembly according to claim 4, characterized in that the piston (6) is a hollow cylinder carrying a flange (62) provided with a sealing lip (63) and closed at one end by a face (61) capable of receiving the means for actuating the piston (6). 6 - Ensemble selon la revendication 5, caractérisé par le fait que la face (61) du piston (6) est munie d'un évent (64). 6 - An assembly according to claim 5, characterized in that the face (61) of the piston (6) is provided with a vent (64). 7 - Ensemble selon l'une des revendications 4 à 6, caractérisé par le fait que la tige (7) porte une lèvre (72) assurant l'étanchéité de son coulissement à l'intérieur du piston. 7 - Assembly according to one of claims 4 to 6, characterized in that the rod (7) carries a lip (72) ensuring the tightness of its sliding inside the piston. 8 - Ensemble selon l'une des revendications 1 à 3, caractérisé par le fait que la tige (607) est munie d'un alésage (674) et que le piston (606) est monté coulissant dans ledit alésage (674). 8 - Assembly according to one of claims 1 to 3, characterized in that the rod (607) is provided with a bore (674) and that the piston (606) is slidably mounted in said bore (674). 9 - Ensemble selon la revendication 8, caractérisé par le fait que le piston (606) est constitué par une pièce cylindrique (661) creuse qui porte un disque (662). 9 - assembly according to claim 8, characterized in that the piston (606) is constituted by a cylindrical part (661) hollow which carries a disc (662). 10 - Ensemble selon l'une des revendications 1 à 9, caractérisé par le fait que la tige (7) porte une collerette (73) de diamètre inférieur à celui de la chambre (34) sur laquelle prend appui un moyen de rappel élastique (8) du piston (6). 10 - assembly according to one of claims 1 to 9, characterized in that the rod (7) carries a collar (73) of diameter less than that of the chamber (34) on which bears an elastic return means ( 8) of the piston (6). 11 - Ensemble selon l'une des revendications 1 à 10, caractérisé par le fait qu'il comporte une reprise d'air (213, 313). 11 - Assembly according to one of claims 1 to 10, characterized in that it comprises an air intake (213, 313). 12 - Ensemble selon l'une des revendications 1 à 11, caractérisé par le fait que la tête de distribution (3) comporte un seul moyen de rappel élastique (8) disposé entre la surface intérieure de la collerette (62), ou du disque (662) du piston (606), et la collerette (73) de la tige (7). 12 - assembly according to one of claims 1 to 11, characterized in that the dispensing head (3) comprises a single elastic return means (8) disposed between the inner surface of the flange (62), or of the disc (662) of the piston (606), and the flange (73) of the rod (7). 13 - Ensemble selon l'une des revendications 1 à 12, caractérisé par le fait que la tête de distribution (503) comporte deux moyens de rappel élastiques (508a, 508b, 708a, 708b). 13 - assembly according to one of claims 1 to 12, characterized in that the dispensing head (503) comprises two elastic return means (508 a , 508 b , 708 a , 708 b ). 14 - Ensemble selon l'une des revendication 1 à 13, caractérisé par le fait que l'axe longitudinal du corps (33) est disposé perpendiculairement à l'axe de la buse de pulvérisation (11). 14 - assembly according to one of claims 1 to 13, characterized in that the longitudinal axis of the body (33) is arranged perpendicular to the axis of the spray nozzle (11). 15 - Ensemble selon l'une des revendications 1 à 13, caractérisé par le fait que l'axe longitudinal du corps (433) est disposé parallèlement à l'axe de la buse de pulvérisation (411). 15 - assembly according to one of claims 1 to 13, characterized in that the longitudinal axis of the body (433) is arranged parallel to the axis of the spray nozzle (411). 16 - Ensemble selon l'une des revendications 1 à 15, caractérisé par le fait que la tête de distribution (3) est protégée par un capuchon (4) qui comporte une fenêtre (45) disposée au vis-à-vis de la buse de pulvérisation (11). 16 - assembly according to one of claims 1 to 15, characterized in that the dispensing head (3) is protected by a cap (4) which has a window (45) arranged opposite the spray nozzle (11). 17 - Ensemble selon la revendication 16, caractérisé par le fait que le capuchon (4) porte un levier (43) pour l'actionnement du piston (6). 17 - assembly according to claim 16, characterized in that the cap (4) carries a lever (43) for actuating the piston (6).
EP93403031A 1992-12-28 1993-12-15 Assembly for spraying a liquid comprising a precompression pump Expired - Lifetime EP0605275B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9215768 1992-12-28
FR9215768A FR2699835B1 (en) 1992-12-28 1992-12-28 Kit for spraying a liquid comprising a precompression pump.

Publications (2)

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EP0605275A1 true EP0605275A1 (en) 1994-07-06
EP0605275B1 EP0605275B1 (en) 1996-07-17

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EP93403031A Expired - Lifetime EP0605275B1 (en) 1992-12-28 1993-12-15 Assembly for spraying a liquid comprising a precompression pump

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US (1) US5370281A (en)
EP (1) EP0605275B1 (en)
JP (1) JPH06219478A (en)
DE (1) DE69303700T2 (en)
ES (1) ES2089760T3 (en)
FR (1) FR2699835B1 (en)

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FR2715585A1 (en) * 1994-01-28 1995-08-04 Oreal Almost continuous liquid distribution assembly comprising a pump and use of such an assembly for spraying a hair spray.
EP0689876A1 (en) * 1994-06-29 1996-01-03 Monturas, S.A. Pump sprayer with stationary discharge
FR2727162A1 (en) * 1994-11-23 1996-05-24 Oreal MANUAL PRESSURE PUMP FOR SPRAYING A LIQUID AND DISPENSING ASSEMBLY PROVIDED WITH SUCH A PUMP
EP1514608A1 (en) * 2003-09-11 2005-03-16 Ing. Erich Pfeiffer GmbH Dosing device comprising an elastic actuator

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US6050457A (en) * 1995-12-06 2000-04-18 The Procter & Gamble Company High pressure manually-actuated spray pump
DE19610456B4 (en) * 1996-03-16 2006-10-19 Ing. Erich Pfeiffer Gmbh Discharge device for media
US20040182884A1 (en) * 2002-09-11 2004-09-23 Tetsuya Tada Auxiliary cover for pump dispenser and vessel attached with pump dispenser
WO2012151398A1 (en) * 2011-05-03 2012-11-08 Meadwestvaco Calmar, Inc. Liquid dispenser containers

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EP1514608A1 (en) * 2003-09-11 2005-03-16 Ing. Erich Pfeiffer GmbH Dosing device comprising an elastic actuator

Also Published As

Publication number Publication date
EP0605275B1 (en) 1996-07-17
DE69303700D1 (en) 1996-08-22
FR2699835A1 (en) 1994-07-01
US5370281A (en) 1994-12-06
FR2699835B1 (en) 1995-03-31
JPH06219478A (en) 1994-08-09
DE69303700T2 (en) 1997-03-06
ES2089760T3 (en) 1996-10-01

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