EP0790936B1 - Manually operated metering pump for a container with a flexible body - Google Patents

Manually operated metering pump for a container with a flexible body Download PDF

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Publication number
EP0790936B1
EP0790936B1 EP95940287A EP95940287A EP0790936B1 EP 0790936 B1 EP0790936 B1 EP 0790936B1 EP 95940287 A EP95940287 A EP 95940287A EP 95940287 A EP95940287 A EP 95940287A EP 0790936 B1 EP0790936 B1 EP 0790936B1
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EP
European Patent Office
Prior art keywords
ring
pump
pusher
hollow
metering chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95940287A
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German (de)
French (fr)
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EP0790936A1 (en
Inventor
Catherine Suck
Pierre Bret
Jacques Pozzi
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.)
Promotion Recherche et Innovation Technologique Ste
Original Assignee
Promotion Recherche et Innovation Technologique Ste
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Publication of EP0790936A1 publication Critical patent/EP0790936A1/en
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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
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • 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
    • B05B11/026—Membranes 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
    • B05B11/1023—Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem
    • 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
    • B05B11/1067—Pump inlet valves actuated by pressure
    • 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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material

Definitions

  • the invention relates to a manually controlled metering pump. for bottle with deformable cover.
  • the beads tend to leave their conical seat and the pump no longer provides a satisfactory sealing of the bottle.
  • a metering pump intended for very viscous fluids, comprising a metering chamber between a valve lower and an upper valve, a pusher pushed back by a spring and a spout communicating with the metering chamber through the central channel.
  • the object of the present invention is to propose a pump ensuring the tightness of the bottle whatever its position.
  • the subject of the invention is a controlled dosing pump manual for bottle with deformable cover, comprising a metering chamber between a lower valve and a upper valve, a pusher pushed back by a spring and a spout communicating with the dosing chamber by through a central channel, the upper valve being carried by a disc constituting the base of a rod hollow integral with the pusher, and bearing under a piston hollow likely to be driven by the pusher, and sliding in the dosing chamber, characterized in that the lower valve is flexible, frustoconical in shape and is held on the bottom of the pump by a key, in that the hollow piston carries a narrowing on which comes lean on a central tube carried by the pusher and in this as the hollow stem widens above the narrowing, an O-ring being disposed between enlargement of the hollow stem and narrowing.
  • the bottle fitted with the pump according to the invention comprises a rigid outer casing 1 and a deformable inner envelope 2 placed inside of the rigid envelope 1.
  • the neck 3 of the deformable envelope 2 is placed on the neck 4 of the rigid envelope 1.
  • a pump doser 5 is placed on envelopes 1 and 2 of the bottle with interposition of a neck seal 6.
  • a cover 7 protection is installed on the pump 5.
  • the pump 5 comprises a body 8 having a skirt external cylindrical 9 capable of snap-fastening by the outside on the rigid envelope 1 of the bottle, a skirt intermediate 10 applying inside the envelope deformable inner 2 of the bottle, and an inner skirt 11. These three coaxial skirts are worn by a ring plate 12 which rests on the neck seal 6 by compressing it to seal between the inside of the envelope deformable 2 and the outside of the bottle.
  • a bottom 13 of the pump 5 Under the flat ring 12 is disposed a bottom 13 of the pump 5.
  • This bottom 13 has an outer cylindrical wall 14 applying to the interior of the intermediate skirt 10 and an inner cylindrical wall 15 applying to inside the inner skirt 11 of the body 8 of the pump 5.
  • These two walls 14 and 15 are connected by a part frusto-conical 16 open downwards, the edge of which exterior protrudes slightly from the wall outer 14 to cooperate with a groove presented by the intermediate skirt 10 in order to ensure the locking in position of the bottom 13 on the body 8.
  • the frustoconical part 16 extends inwards by another part frustoconical 17 open upwards and having a central orifice 18.
  • the frustoconical part 17 of the bottom 13 also has at least one orifice 19 intended to communicate the interior of the deformable envelope 2 with the metering chamber 20 placed above the bottom 13.
  • a flexible, frustoconical lower valve 21 On the frustoconical part 17 open upwards, is disposed a flexible, frustoconical lower valve 21, and held in abutment on the bottom 13 by a through key 22 the valve 21 and the central orifice 18 of the bottom 13.
  • This valve 21 closes the orifice 19 for communication between the inner envelope 2 of the bottle and the dosing chamber 20 of the pump.
  • the body 8 of the pump 5 presents from outside to inside, three walls coaxial: an outer wall 23 extending in the extension of the outer skirt 9, then after a constricted 24, extending by a cylindrical part 25 provided with an outward annular rib for cooperate with the cover 7 while ensuring its maintenance; a intermediate wall 26, attached at least partially to the outer wall 23 at its upper part by arms 27 radials; and an inner wall 28 of substantially same height as the intermediate wall 26.
  • the inner wall 28 carries a flat ring 29 which extends towards the axis 30 of the bottle, and is extends by a cylindrical wall 31 extending towards the high.
  • This cylindrical wall 31 serves as a guide for the piston 32 of the pump 5.
  • This piston 32 is cylindrical and hollow. He introduces about halfway up, a narrowing 33 intended to serve of support for pusher 34 of pump 5. It bears at its base an annular enlargement 35 capable of coming to bear under the flat ring 29. Under this widening 35 is disposed an annular groove 36 in which is disposed an O-ring 37 sealing against the wall interior 28.
  • the pusher 34 essentially consists of a spout 38 at its upper part, a central tube 39 and a bell 40, coaxial with the central tube 39.
  • This bell 40 has a cylindrical skirt 41 capable of sliding inside of the intermediate wall 26.
  • the bell 40 is stressed upwards by a spiral spring 42, which extends from the upper part of the bell 40, inside the skirt 41 of the bell 40, outside the wall interior 28, up to the flat ring 12 on which it takes support.
  • the central tube 39 is capable of sliding at inside the piston 32 until it comes into contact with the narrowing 33. It carries inside a rod 43, hollow, which is integral with the central tube 39.
  • the rod 43 slides inside the narrowing 33 of the piston 32. It widens below the narrowing 33 and between its widening 45 and the narrowing 33 is arranged a O-ring seal 44. Below her enlargement 45, the hollow rod 43 has openings side 46, capable of communicating the interior of rod 43 with the outside.
  • the rod 43 carries a disc 47 on which is disposed an upper valve 48 of shape annular, which rests under the enlargement 35 of the piston 32.
  • the bell 40 wears, outside, a ring 49. Between this ring 49 and the upper part of the intermediate wall 26 is provided with a tearable cylindrical collar, not shown, intended to guarantee that the pump will not be used until it has not been removed.
  • the pusher 34 is in position high, the upper valve 48 is closed, the central tube 39 is not supported on the narrowing 33 of the piston 32 but slightly above, the enlargement 35 of the piston 32 is in support under the flat ring 29, and the lower valve 21 is closed.
  • the metering chamber 20 is defined by the space between the upper valve 48 and the valve lower 21 inside the cylindrical wall interior 28.
  • the pump 5 is shown at the end of pumping stroke.
  • the disc 47 is in the low position at level of the flat ring 12, the upper valve 48 is open, the openings 46 of the hollow rod 43 are free, and the product contained in the metering chamber 20 of the Figure 1 has been routed to spout 38 through the central channel 50 of the rod 43 and of the tube 39.
  • a support manual on pusher 34 lowers the central tube 39 until it rests on the narrowing 33 of the piston 32.
  • the upper valve 48 opens and the product contained in the chamber 20 begins to pass, at through the openings 46 of the rod 43, towards the channel central 50.
  • the downward movement of pusher 34 continues driving the piston 32 which slides in the cylindrical wall 31.
  • the cylindrical skirt 41 of the bell 40 slides inside the intermediate wall 26 and the spring 42 is compressed.
  • the product contained in the chamber 20 flows through the openings 46, the central channel 50 and spout 38.
  • FIG. 1 Another modification concerns the groove 36 for holding the O-ring 37.
  • this groove 36 surrounds the O-ring on three sides.
  • the groove 36 no longer maintains the O-ring 37 only on two sides: the top and the interior.
  • the underside of the O-ring 37 is maintained by the outer edge of the disc 47 constituting the base of the rod 43.
  • the pump according to the invention has been described in the case of a bottle with a deformable wall. Its operation is identical in the case of a piston bottle rising in a cylindrical envelope to keep the product away from air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reciprocating Pumps (AREA)
  • Closures For Containers (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

PCT No. PCT/FR95/01470 Sec. 371 Date May 29, 1997 Sec. 102(e) Date May 29, 1997 PCT Filed Nov. 8, 1995 PCT Pub. No. WO96/15045 PCT Pub. Date May 23, 1996A manually operated metering pump for a container with a flexible body, comprising a metering chamber (20) between a lower valve (21) and an upper valve (48), a spring-biased push button (34), and a nozzle communicating with the metering chamber (20) via a central channel. The lower valve (21) is flexible and frusto-conical, and the upper valve (48) is supported on a disc (47) forming the base of a hollow rod (43) secured to the push button (34), and engages the bottom of a hollow plunger (32) operated via a push button (34).

Description

L'invention concerne une pompe doseuse à commande manuelle pour flacon à enveloppe déformable.The invention relates to a manually controlled metering pump. for bottle with deformable cover.

Certains produits liquides ou pâteux, notamment médicamenteux, sont présentés dans des flacons, et ne doivent pas être mis en présence d'air pour garder leurs propriétés ou pour ne pas se dégrader. Les flacons qui les contiennent doivent alors avoir une enveloppe déformable, pour que le volume de cette enveloppe corresponde toujours au volume du liquide présent dans le flacon.Certain liquid or pasty products, in particular medicated, are presented in vials, and do not should not be exposed to air to keep their properties or not to degrade. The bottles which contain must then have a deformable envelope, so that the volume of this envelope always corresponds the volume of liquid in the bottle.

Pour l'extraction du liquide, il est connu d'utiliser un bouchon vissé qui est enlevé, puis remis en place. Il est également connu d'utiliser une pompe à commande manuelle présentant à sa partie inférieure un clapet d'admission à bille, et à sa partie supérieure un clapet de sortie à bille. Les pompes de ce type fonctionnent correctement tant qu'elles sont maintenues rigoureusement verticales.For the extraction of the liquid, it is known to use a screw cap which is removed, then replaced. It is also known to use a manually operated pump having at its lower part an intake valve to ball, and at its upper part an outlet valve ball. Pumps of this type work properly as long that they are kept strictly vertical.

Si le flacon est couché ou incliné, les billes ont tendance à quitter leur siège conique et la pompe n'assure plus une étanchéité satisfaisante du flacon.If the bottle is lying or tilted, the beads tend to leave their conical seat and the pump no longer provides a satisfactory sealing of the bottle.

Il est également connu du document Patent Abstract of Japan, vol. 013 N° 265, 19 Juin 1989 et JP-A-01 066 475, une pompe doseuse, destinée aux fluides très visqueux, comportant une chambre de dosage comprise entre un clapet inférieur et un clapet supérieur, un poussoir repoussé par un ressort et un bec communiquant avec la chambre de dosage par l'intermédiaire du canal central.It is also known from the Patent Abstract of Japan, vol. 013 N ° 265, June 19, 1989 and JP-A-01 066 475, a metering pump, intended for very viscous fluids, comprising a metering chamber between a valve lower and an upper valve, a pusher pushed back by a spring and a spout communicating with the metering chamber through the central channel.

La présente invention a pour but de proposer une pompe assurant l'étanchéité du flacon quelle que soit sa position. The object of the present invention is to propose a pump ensuring the tightness of the bottle whatever its position.

L'invention a pour objet une pompe doseuse à commande manuelle pour flacon à enveloppe déformable, comportant une chambre de dosage comprise entre un clapet inférieur et un clapet supérieur, un poussoir repoussé par un ressort et un bec communiquant avec la chambre de dosage par l'intermédiaire d'un canal central, le clapet supérieur étant porté par un disque constituant la base d'une tige creuse solidaire du poussoir, et s'appuyant sous un piston creux susceptible d'être entraíné par le poussoir, et coulissant dans la chambre de dosage, caractérisé en ce que le clapet inférieur est souple, de forme tronconique et est maintenu sur le fond de la pompe par une clef, en ce que le piston creux porte un rétrécissement sur lequel vient s'appuyer un tube central porté par le poussoir et en ce que la tige creuse s'élargit au dessus du rétrécissement, un joint torique d'étanchéité étant disposé entre l'élargissement de la tige creuse et le rétrécissement.The subject of the invention is a controlled dosing pump manual for bottle with deformable cover, comprising a metering chamber between a lower valve and a upper valve, a pusher pushed back by a spring and a spout communicating with the dosing chamber by through a central channel, the upper valve being carried by a disc constituting the base of a rod hollow integral with the pusher, and bearing under a piston hollow likely to be driven by the pusher, and sliding in the dosing chamber, characterized in that the lower valve is flexible, frustoconical in shape and is held on the bottom of the pump by a key, in that the hollow piston carries a narrowing on which comes lean on a central tube carried by the pusher and in this as the hollow stem widens above the narrowing, an O-ring being disposed between enlargement of the hollow stem and narrowing.

Selon d'autres caractéristiques de l'invention :

  • le piston creux porte un joint torique pour assurer l'étanchéité dans la chambre de dosage .
  • le joint torique est tenu dans une gorge portée par le piston creux.
  • la gorge entoure le joint torique sur trois côtés;
  • la gorge maintient le joint torique sur le dessus et à l'intérieur, et le dessous est maintenu par le bord du disque constituant la base de la tige creuse ;
  • le clapet inférieur est porté par une partie tronconique du fond de la pompe ;
According to other characteristics of the invention:
  • the hollow piston carries an O-ring to seal in the metering chamber.
  • the O-ring is held in a groove carried by the hollow piston.
  • the groove surrounds the O-ring on three sides;
  • the groove holds the O-ring on top and inside, and the bottom is held by the edge of the disc constituting the base of the hollow rod;
  • the lower valve is carried by a frustoconical part of the bottom of the pump;

L'invention apparaítra mieux à la lecture de la description qui suit faite avec référence au dessin annexé sur lequel on peut voir :

  • Figure 1 - une vue en coupe d'un flacon à enveloppe déformable équipé d'une pompe selon l'invention ;
  • Figure 2 - une vue en coupe de la pompe de la figure 1 en fin de course de pompage pour l'expulsion du liquide.
  • Figure 3 - une vue en coupe d'une variante de réalisation d'un flacon à enveloppe déformable équipé d'une pompe selon l'invention.
  • Figure 4 - une vue en coupe de la pompe de la figure 3 en cours de pompage.
    • The invention will appear better on reading the following description made with reference to the attached drawing on which we can see:
  • Figure 1 - a sectional view of a bottle with a deformable envelope equipped with a pump according to the invention;
  • Figure 2 - a sectional view of the pump of Figure 1 at the end of the pumping stroke for the expulsion of the liquid.
  • Figure 3 - a sectional view of an alternative embodiment of a deformable envelope bottle equipped with a pump according to the invention.
  • Figure 4 - a sectional view of the pump of Figure 3 during pumping.

    • Sur la figure 1, le flacon équipé de la pompe selon l'invention comporte une enveloppe extérieure rigide 1 et une enveloppe intérieure déformable 2 placée à l'intérieur de l'enveloppe rigide 1. Le col 3 de l'enveloppe déformable 2 est posé sur le col 4 de l'enveloppe rigide 1. Une pompe doseuse 5 est mise en place sur les enveloppes 1 et 2 du flacon avec interposition d'un joint de col 6. Un capot 7 de protection est mis en place sur la pompe 5.In FIG. 1, the bottle fitted with the pump according to the invention comprises a rigid outer casing 1 and a deformable inner envelope 2 placed inside of the rigid envelope 1. The neck 3 of the deformable envelope 2 is placed on the neck 4 of the rigid envelope 1. A pump doser 5 is placed on envelopes 1 and 2 of the bottle with interposition of a neck seal 6. A cover 7 protection is installed on the pump 5.

    La pompe 5 comporte un corps 8 présentant une jupe cylindrique extérieure 9 susceptible de s'encliqueter par l'extérieur sur l'enveloppe rigide 1 du flacon, une jupe intermédiaire 10 s'appliquant à l'intérieur de l'enveloppe intérieure déformable 2 du flacon, et une jupe intérieure 11. Ces trois jupes coaxiales sont portées par un anneau plat 12 qui s'appuie sur le joint de col 6 en le comprimant pour assurer l'étanchéité entre l'intérieur de l'enveloppe déformable 2 et l'extérieur du flacon.The pump 5 comprises a body 8 having a skirt external cylindrical 9 capable of snap-fastening by the outside on the rigid envelope 1 of the bottle, a skirt intermediate 10 applying inside the envelope deformable inner 2 of the bottle, and an inner skirt 11. These three coaxial skirts are worn by a ring plate 12 which rests on the neck seal 6 by compressing it to seal between the inside of the envelope deformable 2 and the outside of the bottle.

    Sous l'anneau plat 12 est disposé un fond 13 de la pompe 5. Ce fond 13 comporte une paroi cylindrique extérieure 14 s'appliquant à l'intérieur de la jupe intermédiaire 10 et une paroi cylindrique intérieure 15 s'appliquant à l'intérieur de la jupe intérieure 11 du corps 8 de la pompe 5. Ces deux parois 14 et 15 sont reliées par une partie tronconique 16 ouverte vers le bas, et dont le bord extérieur fait légèrement saillie par rapport à la paroi extérieure 14 pour coopérer avec une rainure présentée par la jupe intermédiaire 10 afin d'assurer le blocage en position du fond 13 sur le corps 8. La partie tronconique 16 se prolonge vers l'intérieur par une autre partie tronconique 17 ouverte vers le haut et présentant un orifice central 18. La partie tronconique 17 du fond 13 présente par ailleurs au moins un orifice 19 destiné à faire communiquer l'intérieur de l'enveloppe déformable 2 avec la chambre de dosage 20 placée au dessus du fond 13.Under the flat ring 12 is disposed a bottom 13 of the pump 5. This bottom 13 has an outer cylindrical wall 14 applying to the interior of the intermediate skirt 10 and an inner cylindrical wall 15 applying to inside the inner skirt 11 of the body 8 of the pump 5. These two walls 14 and 15 are connected by a part frusto-conical 16 open downwards, the edge of which exterior protrudes slightly from the wall outer 14 to cooperate with a groove presented by the intermediate skirt 10 in order to ensure the locking in position of the bottom 13 on the body 8. The frustoconical part 16 extends inwards by another part frustoconical 17 open upwards and having a central orifice 18. The frustoconical part 17 of the bottom 13 also has at least one orifice 19 intended to communicate the interior of the deformable envelope 2 with the metering chamber 20 placed above the bottom 13.

    Sur la partie tronconique 17 ouverte vers le haut, est disposé un clapet inférieur 21 souple, tronconique, et maintenu en appui sur le fond 13 par une clef 22 traversant le clapet 21 et l'orifice central 18 du fond 13.On the frustoconical part 17 open upwards, is disposed a flexible, frustoconical lower valve 21, and held in abutment on the bottom 13 by a through key 22 the valve 21 and the central orifice 18 of the bottom 13.

    Ce clapet 21 obture l'orifice 19 de communication entre l'enveloppe intérieure 2 du flacon et la chambre de dosage 20 de la pompe.This valve 21 closes the orifice 19 for communication between the inner envelope 2 of the bottle and the dosing chamber 20 of the pump.

    Au dessus de l'anneau plat 12, le corps 8 de la pompe 5 présente de l'extérieur vers l'intérieur, trois parois coaxiales : une paroi extérieure 23 s'étendant dans le prolongement de la jupe extérieure 9, puis après un rétreint 24, se prolongeant par une partie cylindrique 25 munie d'une nervure annulaire vers l'extérieur pour coopérer avec le capot 7 en assurant son maintien ; une paroi intermédiaire 26, rattachée au moins partiellement à la paroi extérieure 23 à sa partie supérieure par des bras 27 radiaux ; et une paroi intérieure 28 sensiblement de même hauteur que la paroi intermédiaire 26.Above the flat ring 12, the body 8 of the pump 5 presents from outside to inside, three walls coaxial: an outer wall 23 extending in the extension of the outer skirt 9, then after a constricted 24, extending by a cylindrical part 25 provided with an outward annular rib for cooperate with the cover 7 while ensuring its maintenance; a intermediate wall 26, attached at least partially to the outer wall 23 at its upper part by arms 27 radials; and an inner wall 28 of substantially same height as the intermediate wall 26.

    A sa partie supérieure, la paroi intérieure 28 porte un anneau plat 29 qui s'étend vers l'axe 30 du flacon, et se prolonge par une paroi cylindrique 31 s'étendant vers le haut.At its upper part, the inner wall 28 carries a flat ring 29 which extends towards the axis 30 of the bottle, and is extends by a cylindrical wall 31 extending towards the high.

    Cette paroi cylindrique 31 sert de guide au piston 32 de la pompe 5. Ce piston 32 est cylindrique et creux. Il présente à mi-hauteur environ, un rétrécissement 33 destiné à servir d'appui au poussoir 34 de la pompe 5. Il porte à sa base un élargissement annulaire 35 susceptible de venir en appui sous l'anneau plat 29. Sous cet élargissement 35 est disposée une gorge annulaire 36 dans laquelle est disposé un joint torique 37 assurant l'étanchéité contre la paroi intérieure 28.This cylindrical wall 31 serves as a guide for the piston 32 of the pump 5. This piston 32 is cylindrical and hollow. He introduces about halfway up, a narrowing 33 intended to serve of support for pusher 34 of pump 5. It bears at its base an annular enlargement 35 capable of coming to bear under the flat ring 29. Under this widening 35 is disposed an annular groove 36 in which is disposed an O-ring 37 sealing against the wall interior 28.

    Le poussoir 34 se compose essentiellement d'un bec 38 à sa partie supérieure, d'un tube central 39 et d'une cloche 40, coaxiale au tube central 39. Cette cloche 40 présente une jupe cylindrique 41 susceptible de coulisser à l'intérieur de la paroi intermédiaire 26. La cloche 40 est sollicitée vers le haut par un ressort 42 spiral, qui s'étend depuis la partie supérieure de la cloche 40, à l'intérieur de la jupe 41 de la cloche 40, à l'extérieur de la paroi intérieure 28, jusqu'à l'anneau plat 12 sur lequel il prend appui.The pusher 34 essentially consists of a spout 38 at its upper part, a central tube 39 and a bell 40, coaxial with the central tube 39. This bell 40 has a cylindrical skirt 41 capable of sliding inside of the intermediate wall 26. The bell 40 is stressed upwards by a spiral spring 42, which extends from the upper part of the bell 40, inside the skirt 41 of the bell 40, outside the wall interior 28, up to the flat ring 12 on which it takes support.

    Le tube central 39 est susceptible de coulisser à l'intérieur du piston 32 jusqu'à ce qu'il entre en contact avec le rétrécissement 33. Il porte à l'intérieur une tige 43, creuse, qui est solidaire du tube central 39. La tige 43 coulisse à l'intérieur du rétrécissement 33 du piston 32. Elle s'élargit au dessous du rétrécissement 33 et entre son élargissement 45 et le rétrécissement 33 est disposé un joint torique 44 d'étanchéité. En dessous de son élargissement 45, la tige creuse 43 présente des ouvertures latérales 46, susceptibles de faire communiquer l'intérieur de la tige 43 avec l'extérieur.The central tube 39 is capable of sliding at inside the piston 32 until it comes into contact with the narrowing 33. It carries inside a rod 43, hollow, which is integral with the central tube 39. The rod 43 slides inside the narrowing 33 of the piston 32. It widens below the narrowing 33 and between its widening 45 and the narrowing 33 is arranged a O-ring seal 44. Below her enlargement 45, the hollow rod 43 has openings side 46, capable of communicating the interior of rod 43 with the outside.

    A son extrémité inférieure, la tige 43 porte un disque 47 sur lequel est disposé un clapet supérieur 48 de forme annulaire, qui s'appuie sous l'élargissement 35 du piston 32.At its lower end, the rod 43 carries a disc 47 on which is disposed an upper valve 48 of shape annular, which rests under the enlargement 35 of the piston 32.

    Au niveau de la partie inférieure du bec 38, la cloche 40 porte, à l'extérieur, un anneau 49. Entre cet anneau 49 et la partie supérieure de la paroi intermédiaire 26, est prévu un collier cylindrique déchirable, non représenté, destiné à garantir le non-usage de la pompe tant qu'il n'a pas été enlevé. At the bottom of the spout 38, the bell 40 wears, outside, a ring 49. Between this ring 49 and the upper part of the intermediate wall 26 is provided with a tearable cylindrical collar, not shown, intended to guarantee that the pump will not be used until it has not been removed.

    Lorsque la pompe 5 est au repos, elle est dans la position représentée sur la figure 1. Le poussoir 34 est en position haute, le clapet supérieur 48 est fermé, le tube central 39 n'est pas en appui sur le rétrécissement 33 du piston 32 mais légèrement au-dessus, l'élargissement 35 du piston 32 est en appui sous l'anneau plat 29, et le clapet inférieur 21 est fermé. La chambre 20 de dosage est définie par l'espace compris entre le clapet supérieur 48 et le clapet inférieur 21 à l'intérieur de la paroi cylindrique intérieure 28.When the pump 5 is at rest, it is in the position shown in Figure 1. The pusher 34 is in position high, the upper valve 48 is closed, the central tube 39 is not supported on the narrowing 33 of the piston 32 but slightly above, the enlargement 35 of the piston 32 is in support under the flat ring 29, and the lower valve 21 is closed. The metering chamber 20 is defined by the space between the upper valve 48 and the valve lower 21 inside the cylindrical wall interior 28.

    Sur la figure 2, la pompe 5 est représentée en fin de course de pompage. Le disque 47 est en position basse au niveau de l'anneau plat 12, le clapet supérieur 48 est ouvert, les ouvertures 46 de la tige creuse 43 sont libres, et le produit contenu dans la chambre de dosage 20 de la figure 1 a été acheminé vers le bec 38 par le canal central 50 de la tige 43 et du tube 39.In FIG. 2, the pump 5 is shown at the end of pumping stroke. The disc 47 is in the low position at level of the flat ring 12, the upper valve 48 is open, the openings 46 of the hollow rod 43 are free, and the product contained in the metering chamber 20 of the Figure 1 has been routed to spout 38 through the central channel 50 of the rod 43 and of the tube 39.

    En partant de la position de la Figure 1, le fonctionnement de la pompe selon l'invention est le suivant: un appui manuel sur le poussoir 34 fait descendre le tube central 39 jusqu'à son appui sur le rétrécissement 33 du piston 32. Au cours de cette descente, le clapet supérieur 48 s'ouvre et le produit contenu dans la chambre 20 commence à passer, à travers les ouvertures 46 de la tige 43, vers le canal central 50. Le mouvement de descente du poussoir 34 continue en entraínant le piston 32 qui coulisse dans la paroi cylindrique 31. La jupe cylindrique 41 de la cloche 40 coulisse à l'intérieur de la paroi intermédiaire 26 et le ressort 42 est comprimé. Pendant le mouvement de descente du piston 32, le produit contenu dans la chambre 20 s'écoule par les ouvertures 46, le canal central 50 et le bec 38.Starting from the position of Figure 1, the operation of the pump according to the invention is as follows: a support manual on pusher 34 lowers the central tube 39 until it rests on the narrowing 33 of the piston 32. At during this descent, the upper valve 48 opens and the product contained in the chamber 20 begins to pass, at through the openings 46 of the rod 43, towards the channel central 50. The downward movement of pusher 34 continues driving the piston 32 which slides in the cylindrical wall 31. The cylindrical skirt 41 of the bell 40 slides inside the intermediate wall 26 and the spring 42 is compressed. During the movement of lowering of piston 32, the product contained in the chamber 20 flows through the openings 46, the central channel 50 and spout 38.

    A la fin du mouvement de descente, la pression manuelle sur le poussoir est supprimée et le ressort 42 fait remonter le poussoir 34 entraínant la tige 43 qui en est solidaire. Le clapet supérieur 48 se ferme et la remontée du poussoir 34 entraíne la remontée du piston 32 par l'appui du clapet 48 sous l'élargissement annulaire 35 du piston 32. Le clapet inférieur 21 s'ouvre et le produit contenu dans l'enveloppe déformable 2 remonte alors dans la chambre 20, la diminution de volume correspondante entraínant une déformation corrélative de l'enveloppe déformable 2. Lorsque le poussoir 34 est revenu à sa position initiale de la figure 1, le clapet inférieur 21 se referme.At the end of the descent movement, manual pressure on the pusher is removed and the spring 42 brings the pusher 34 driving the rod 43 which is integral therewith. The upper valve 48 closes and the push-button upward 34 causes the piston 32 to rise by the support of the valve 48 under the annular enlargement 35 of the piston 32. The valve lower 21 opens and the product contained in the envelope deformable 2 then rises in chamber 20, the corresponding decrease in volume resulting in correlative deformation of the deformable envelope 2. When the pusher 34 has returned to its initial position of Figure 1, the lower valve 21 closes.

    Dans le mode de réalisation de la figure 3, certains détails sont modifiés par rapport à la figure 1. Ainsi, au dessus de l'anneau plat 12, le corps 8 de la pompe 5 présente toujours trois parois coaxiales, mais si la paroi intermédiaire 26 et la paroi intérieure 28 sont identiques à celles de la figure 1, la paroi extérieure 51 est modifiée par rapport à la paroi 23 de ]a figure 1. La paroi 51 est ramenée vers l'axe 30 de la pompe 5 et son bord extérieur est profilé pour recevoir le capot 7 de protection. De plus, cette paroi 51 n'est pas reliée à la paroi intermédiaire 26.In the embodiment of Figure 3, some details are changed from Figure 1. So, above the flat ring 12, the body 8 of the pump 5 always has three coaxial walls, but if the wall intermediate 26 and the inner wall 28 are identical to those of Figure 1, the outer wall 51 is modified with respect to the wall 23 of] a Figure 1. The wall 51 is brought back towards the axis 30 of the pump 5 and its edge exterior is profiled to receive the cover 7 of protection. In addition, this wall 51 is not connected to the intermediate wall 26.

    Une autre modification concerne la gorge 36 de maintien du joint torique 37. Sur la figure 1, cette gorge 36 entoure le joint torique sur trois côtés. Dans le mode de réalisation de la Figure 3, la gorge 36 ne maintient plus le joint torique 37 que sur deux côtés : le dessus et l'intérieur. Le dessous du joint torique 37 est maintenu par le bord extérieur du disque 47 constituant la base de la tige 43. Cette disposition permet d'éviter un moule en deux parties pour la fabrication du piston 32 qui porte le joint torique 37, ce qui évite une trace de plan de joint, provenant de l'ouverture et de la fermeture du moule, dans la gorge du joint torique, et améliore ainsi l'étanchéité de ce joint.Another modification concerns the groove 36 for holding the O-ring 37. In FIG. 1, this groove 36 surrounds the O-ring on three sides. In the mode of embodiment of Figure 3, the groove 36 no longer maintains the O-ring 37 only on two sides: the top and the interior. The underside of the O-ring 37 is maintained by the outer edge of the disc 47 constituting the base of the rod 43. This arrangement makes it possible to avoid a mold in two parts for the manufacture of the piston 32 which carries the O-ring 37, which avoids a seal plane trace, from the opening and closing of the mold, in the groove of the O-ring, and thus improves the seal of this joint.

    Sur la figure 4, les dispositions relatives du joint torique 37, de la gorge 36 et du disque 47 sont bien visibles. Le disque 47 est assez large pour entraíner le joint torique 37 lors de la remontée du poussoir, mais il laisse passer autour de lui le produit qui s'écoule vers le canal central 50.In Figure 4, the relative provisions of the O-ring 37, the groove 36 and the disc 47 are clearly visible. The disc 47 is wide enough to drive the O-ring 37 when the plunger is raised, but it lets around the product that flows to the central channel 50.

    Le fonctionnement de la pompe selon les figures 3 et 4 est identique à celui de la pompe des figures 1 et 2.The operation of the pump according to FIGS. 3 and 4 is identical to that of the pump of FIGS. 1 and 2.

    La pompe selon l'invention a été décrite dans le cas d'un flacon à paroi déformable. Son fonctionnement est identique dans le cas d'un flacon à piston remontant dans une enveloppe cylindrique pour conserver le produit à l'abri de l'air.The pump according to the invention has been described in the case of a bottle with a deformable wall. Its operation is identical in the case of a piston bottle rising in a cylindrical envelope to keep the product away from air.

    Claims (5)

    1. A manually-operated metering pump for a flask having a deformable casing, comprising a metering chamber (20) included between a lower valve (21) and an upper valve (48), a pusher (34) returned by a spring (42) and a spout (38) communicating with the metering chamber by means of a central canal, the upper valve (48) being borne by a disc (47) forming the base of a hollow shank (43) integral with the pusher (34), and bearing beneath a hollow piston (32) capable of being entrained by the pusher (34), and sliding in the metering chamber, characterised in that the lower valve (21) is flexible, frustoconical and is held on the base of the pump by a key, in that the hollow piston (32) has a constriction (33) on which a central tube (39) borne by the pusher (34) comes to bear, and in that the hollow shank (43) widens below the constriction (33), an O-ring seal (44) being arranged between the widened section (45) of the hollow shank (43) and the constriction (33).
    2. A pump according to Claim 1, characterised in that the hollow piston (32) bears an O-ring (37) for providing a seal in the metering chamber.
    3. A pump according to Claim 2, characterised in that the O-ring is held in a groove (36) borne by the hollow piston (32).
    4. A pump according to Claim 3, characterised in that the groove (36) surrounds the O-ring (37) on three sides.
    5. A pump according to Claim 3, characterised in that the groove (36) holds the O-ring (37) on the top and on the inside, and the bottom is held by the edge of the disc (47) forming the base of the hollow shank (43).
    EP95940287A 1994-11-10 1995-11-08 Manually operated metering pump for a container with a flexible body Expired - Lifetime EP0790936B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    FR9413582 1994-11-10
    FR9413582A FR2726810B1 (en) 1994-11-10 1994-11-10 MANUALLY CONTROLLED DOSING PUMP FOR BOTTLE WITH DEFORMABLE ENVELOPE
    PCT/FR1995/001470 WO1996015045A1 (en) 1994-11-10 1995-11-08 Manually operated metering pump for a container with a flexible body

    Publications (2)

    Publication Number Publication Date
    EP0790936A1 EP0790936A1 (en) 1997-08-27
    EP0790936B1 true EP0790936B1 (en) 1998-04-29

    Family

    ID=9468755

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP95940287A Expired - Lifetime EP0790936B1 (en) 1994-11-10 1995-11-08 Manually operated metering pump for a container with a flexible body

    Country Status (10)

    Country Link
    US (1) US6021924A (en)
    EP (1) EP0790936B1 (en)
    JP (1) JP3235665B2 (en)
    KR (1) KR100262779B1 (en)
    AT (1) ATE165576T1 (en)
    CA (1) CA2204647C (en)
    DE (1) DE69502295T2 (en)
    ES (1) ES2116114T3 (en)
    FR (1) FR2726810B1 (en)
    WO (1) WO1996015045A1 (en)

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    Also Published As

    Publication number Publication date
    US6021924A (en) 2000-02-08
    KR970707024A (en) 1997-12-01
    DE69502295D1 (en) 1998-06-04
    EP0790936A1 (en) 1997-08-27
    WO1996015045A1 (en) 1996-05-23
    ATE165576T1 (en) 1998-05-15
    CA2204647A1 (en) 1996-05-23
    CA2204647C (en) 2007-01-16
    KR100262779B1 (en) 2000-09-01
    FR2726810B1 (en) 1997-01-31
    DE69502295T2 (en) 1998-09-03
    ES2116114T3 (en) 1998-07-01
    JP3235665B2 (en) 2001-12-04
    FR2726810A1 (en) 1996-05-15
    JPH10512485A (en) 1998-12-02

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