EP2916963B1 - Reservoir de produit fluide - Google Patents

Reservoir de produit fluide Download PDF

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Publication number
EP2916963B1
EP2916963B1 EP13815027.1A EP13815027A EP2916963B1 EP 2916963 B1 EP2916963 B1 EP 2916963B1 EP 13815027 A EP13815027 A EP 13815027A EP 2916963 B1 EP2916963 B1 EP 2916963B1
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EP
European Patent Office
Prior art keywords
annular groove
reservoir
outlet opening
sealing lip
follower piston
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.)
Active
Application number
EP13815027.1A
Other languages
German (de)
English (en)
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EP2916963A1 (fr
Inventor
Fabien ADAM
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aptar France SAS
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Aptar France SAS
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Publication date
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Publication of EP2916963A1 publication Critical patent/EP2916963A1/fr
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/01—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like
    • B05C17/0146—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like comprising a valve in the proximity of the nozzle that is not actuated by pressure, e.g. manually actuated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/02—Membranes or pistons acting on the contents inside the container, e.g. follower pistons
    • B05B11/028—Pistons separating the content remaining in the container from the atmospheric air to compensate underpressure inside the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00503—Details of the outlet element
    • B05C17/00516—Shape or geometry of the outlet orifice or the outlet element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00569—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with a pump in the hand tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/0005—Containers or packages provided with a piston or with a movable bottom or partition having approximately the same section as the container
    • B65D83/0033—Containers or packages provided with a piston or with a movable bottom or partition having approximately the same section as the container the piston being a follower-piston and the dispensing means comprising a hand-operated pressure-device at the opposite part of the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0037—Containers
    • B05B11/0038—Inner container disposed in an outer shell or outer casing
    • 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
    • B65D2539/00—Details relating to closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers
    • B65D2539/001—Details of closures arranged within necks or pouring opening or in discharge apertures, e.g. stoppers
    • B65D2539/003—Details of closures arranged within necks or pouring opening or in discharge apertures, e.g. stoppers provided with sealing flanges or ribs

Definitions

  • the present invention relates to a reservoir comprising a sliding shaft, a collar defining an outlet opening, an internal shoulder connecting the sliding shaft to the outlet opening and a follower piston engaged to slide in the sliding shaft, the piston defining at least one sealing lip.
  • This type of tank is frequently used in the field of cosmetics, or more generally for storing sensitive or fragile fluid products. Indeed, this type of piston follower tank stores the fluid without it never in contact with air. This is possible since the displacement of the follower piston makes it possible to vary the useful volume of the reservoir as fluid is extracted from it.
  • a dispensing member without air intake it is ensured that the fluid product stored in the tank is never in contact with air.
  • a conventional problem inherent in the follower piston lies in the fact that it is difficult to extract all of the fluid product stored in the tank. Indeed, due to the configuration of the follower piston of the tank shoulder and the dispensing member (pump), it is virtually impossible to completely empty the tank. This is called fluid restitution or restitution rate, characteristic of the capacity of the tank to be emptied more or less perfectly.
  • An object of the present invention is to increase this rate of refund by minimizing the volume of fluid that remains stored in the reservoir when the follower piston has completed its course.
  • the present invention therefore also aims to overcome this drawback related to the vacuum packaging of the tank.
  • the present invention provides a fluid reservoir comprising a sliding shaft, a neck defining an outlet opening, an internal shoulder connecting the sliding shaft to the outlet opening, the inner shoulder being provided. an annular groove which extends in the extension of the sliding shaft so that the internal shoulder defines an annular ring which connects the annular groove to the outlet opening, a follower piston engaged in the sealing shaft sliding, the piston defining at least one sealing lip which is received in the annular groove when the reservoir is empty, the annular ring being formed with at least one radial groove which connects the annular groove to the outlet opening of the neck.
  • the annular ring comprises a plurality of radial grooves.
  • These radial grooves which connect the sliding shaft to the outlet opening of the neck at the internal shoulder can evacuate any air pockets that would have formed under the shoulder during filling of the tank.
  • These radial grooves are all the more useful that the reservoir is provided with an annular groove for receiving the upper lip of the piston, since this annular groove has the effect of promoting the formation of air pockets.
  • the groove and said at least one groove have respective bottoms which connect continuously.
  • the groove communicates directly and without discontinuity with the groove, thus optimizing the evacuation of air possibly trapped.
  • the bottom of said at least one groove extends inclined upwards of the groove towards the opening. In this way, the air possibly trapped can still very easily be evacuated towards the opening of the neck.
  • said at least one groove has a trapezoidal or triangular section. This configuration makes it possible to promote the evacuation of the air possibly trapped while limiting the total cumulative volume of the grooves, which increases the rate of restitution.
  • the follower piston comprises a plate, the lip protruding from the plate, so that the plate is in contact with the ring when the lip is received in the groove. This further increases the rate of return of the reservoir by minimizing its dead volume.
  • the follower piston comprises a central cup which extends substantially in the extension of the opening of the neck to receive a lower part of a pump or a valve.
  • the follower piston comprises a lower lip and an upper lip in leaktight sliding in the barrel, the upper lip being received in the groove when the reservoir is empty.
  • the annular groove has a section of shape substantially similar to that of the lip.
  • the spirit of the invention lies in the optimization of the restitution rate of the follower piston tank by providing a housing for the upper lip of the follower piston at the end of its stroke.
  • this feature promotes the formation of air pockets during filling of the tank, the air of these pockets being evacuated due to the presence of radial grooves which connect the annular groove to the outlet opening of the neck.
  • the reservoir comprises three constituent elements, namely a tank body 1, a follower piston 2 and optionally a bottom 3. These three constituent elements can be made by injection molding of suitable plastic material.
  • the tank body 1 may optionally be made of glass, ceramic or metal.
  • the reservoir body 1 here has the particularity to consist of two components, namely an external component 1a and an internal component 1b, and this for reasons including aesthetic.
  • the inner component 1b can be made of an opaque material while the outer component 1a can be made of a transparent material so that the inner component 1b can be visible through the transparent outer component 1a.
  • the outer component 1a may for example be overmolded on the inner component 1b.
  • These two components 1a, 1b together form the tank body 1.
  • the tank body forms an inner sliding shaft 11 of substantially or perfectly cylindrical shape. This shaft is here formed by the wall internal component 1 b.
  • the tank body 1 forms a shoulder 14 of substantially annular shape which connects the sliding block 11 to an outlet opening 13 which is here defined by a projecting neck 12.
  • the inner part of the shoulder 14 is here formed by the internal component 1 b.
  • the outer portion of the shoulder is formed by the outer portion 1a and connects the outer wall of the tank body to the outer portion of the neck 12.
  • the outlet opening 13 is partially formed by the inner component 1b and the component external 1a.
  • the tank body 1 forms several steps allowing a fixed and final reception of the bottom 3.
  • the follower piston 2 is received inside the sliding barrel 11 so as to be able to move there sealingly.
  • the follower piston 2 comprises an outer skirt 20 forming an upper annular sealing lip 21 and a lower annular sealing lip 22 which both slide sealingly inside the barrel 11. From this skirt 20, the follower piston 2 forms an annular plate 23 which extends inwards to the level of a central cup 24 which forms a recess with respect to the plate 23.
  • the follower piston 2 is in its maximum low position, the bucket 24 being in contact with the bottom 3.
  • the two annular sealing lips 21 and 22 are in contact with the sliding drum 11. This configuration corresponds to that in which the tank is filled to a maximum. Indeed, the volume of the tank above the follower piston 2 is maximum, while the volume defined below the follower piston 2 is minimal.
  • a dispensing member such as a pump without air intake
  • a dispensing member is intended to be mounted on the neck 12 extending into the outlet opening 13, so as to be able to take the fluid product stored in the tank.
  • a dose of fluid is dispensed and a dose of fluid is withdrawn from the reservoir.
  • This causes a depression inside the tank which has the effect of displacing the follower piston 2 by suction towards the opening 13.
  • the tank has a minimum volume.
  • the bucket 24 of the follower piston is located axially just below the outlet opening 13 so as to accommodate the lower part of the dispensing member (pump).
  • the shape of this annular groove 15 in cross section corresponds roughly or substantially to the cross-sectional shape of the upper lip 21, so that a minimum dead volume remains in the groove 15 when the lip 21 is there received.
  • An annular ring 16 is thus formed between the annular groove 15 and the opening 13.
  • This ring 16 is defined by the lower wall of the shoulder 14.
  • the annular groove 15 can significantly improve the rate of return of the reservoir .
  • radial grooves 17 are formed in the ring 16 of the shoulder 14: they radially connect the annular groove 15 to the outlet opening 13.
  • the ring 16 is provided with six radial grooves 17.
  • the bottom of the grooves 17 extends in alignment with the bottom of the groove 15.
  • the bottom of the grooves 17 extends at the same axial height as the bottom of the groove 15.
  • the reservoir is made in one piece.
  • there is another type of radial grooves 17 ' whose bottom is certainly connected continuously to the bottom of the groove 15, but extends inclined upwards to open up in the outlet opening 13 While the cross section of the grooves 17 is substantially trapezoidal in shape, the cross section of the grooves 17 is rather triangular in shape.
  • the function of the radial grooves 17, 17 ' is to provide an evacuation path for air possibly trapped inside the reservoir at the level of the shoulder 14.
  • a follower piston tank with a viscous product such as cream
  • one or more pockets of air can be formed at this location, and during vacuum packaging, these air pockets undergo a very rapid volume expansion, which can lead to a sudden rise of fluid in the air.
  • the radial grooves 17, 17 'thus provide an evacuation passage which directly connects the zone of formation of the air pockets to the outlet opening 13. Without the radial grooves of the invention, the phenomenon of pocket formation of The air would be further amplified due to the presence of the annular groove 15 which is precisely located at the area of formation of the air pockets. Thus, by directly connecting the annular groove to the outlet opening 13, the radial grooves 17, 17 'ensure complete evacuation of the air possibly trapped under the shoulder 14. On the other hand, because of their trapezoidal or triangular shape, the total cumulative volume of the grooves is greatly reduced, thereby reducing the dead volume of the tank when empty. Indeed, the dead volume of the tank is mainly constituted by the volume of the grooves 17 and a portion of the bucket 14, since the plate 23 comes into contact with or in the direct vicinity of the shoulder 14 and that the groove 15 is substantially completely filled by the upper sealing lip 21.
  • the tank recovery rate is considerably increased by housing the upper lip of the follower piston in an annular receiving groove of appropriate shape, but also the air possibly trapped in the reservoir at this groove
  • the annulus can be evacuated through radial grooves that connect the groove to the outlet opening.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)

Description

  • La prĆ©sente invention concerne un rĆ©servoir comprenant un fĆ»t de coulissement, un col dĆ©finissant une ouverture de sortie, un Ć©paulement interne reliant le fĆ»t de coulissement Ć  l'ouverture de sortie et un piston suiveur engagĆ© Ć  coulissement Ć©tanche dans le fĆ»t de coulissement, le piston dĆ©finissant au moins une lĆØvre de coulissement Ć©tanche. Ce type de rĆ©servoir est frĆ©quemment utilisĆ© dans le domaine de la cosmĆ©tique, ou plus gĆ©nĆ©ralement pour stocker des produits fluides sensibles ou fragiles. En effet, ce type de rĆ©servoir Ć  piston suiveur permet de stocker le produit fluide sans que celui-ci ne soit jamais en contact avec de l'air. Cela est possible Ć©tant donnĆ© que le dĆ©placement du piston suiveur permet de faire varier le volume utile du rĆ©servoir Ć  mesure que du produit fluide en est extrait. En utilisant avantageusement un organe de distribution sans reprise d'air, on garantit que le produit fluide stockĆ© dans le rĆ©servoir n'est jamais en contact avec de l'air.
  • Un problĆØme conventionnel inhĆ©rent au piston suiveur rĆ©side dans le fait qu'il est difficile d'extraire la totalitĆ© du produit fluide stockĆ© dans le rĆ©servoir. En effet, en raison de la configuration du piston suiveur de l'Ć©paulement du rĆ©servoir et de l'organe de distribution (pompe), il est pratiquement impossible de vider totalement le rĆ©servoir. On parle alors de restitution de produit fluide ou de taux de restitution, caractĆ©ristique de la capacitĆ© du rĆ©servoir Ć  ĆŖtre vidĆ©e plus ou moins parfaitement.
  • Un but de la prĆ©sente invention est d'augmenter ce taux de restitution en minimisant au maximum le volume de produit fluide qui reste stockĆ© dans le rĆ©servoir lorsque le piston suiveur a terminĆ© sa course.
  • Un autre problĆØme que l'on rencontre avec les rĆ©servoirs Ć  piston suiveur est liĆ© Ć  son conditionnement sous vide. En effet, lorsque l'on remplit le rĆ©servoir, il est frĆ©quent que des poches d'air se forment sous l'Ć©paulement interne Ć  proximitĆ© du fĆ»t de coulissement. Cela s'explique aisĆ©ment du fait que le rĆ©servoir forme Ć  cet endroit une zone difficilement remplissable, notamment en raison de la gravitĆ©. Lors du conditionnement sous vide, le rĆ©servoir rempli de produit fluide est soumis Ć  une dĆ©pression plus ou moins profonde dans le but de retirer l'air du rĆ©servoir. Lorsqu'une poche d'air est prĆ©sente sous l'Ć©paulement interne, la mise en dĆ©pression du rĆ©servoir gĆ©nĆØre une expansion de volume de la poche d'air, ce qui a pour consĆ©quence de faire remonter rapidement du produit fluide dans l'ouverture du col. Il en rĆ©sulte parfois que du produit fluide jaillit hors du col et vient souiller l'extĆ©rieur du rĆ©servoir, ce qui n'est bien entendu pas acceptable.
  • La prĆ©sente invention a donc Ć©galement pour but de remĆ©dier Ć  cet inconvĆ©nient liĆ© au conditionnement sous vide du rĆ©servoir.
  • Pour atteindre ces diffĆ©rents buts, la prĆ©sente invention propose un rĆ©servoir de produit fluide comprenant un fĆ»t de coulissement, un col dĆ©finissant une ouverture de sortie, un Ć©paulement interne reliant le fĆ»t de coulissement Ć  l'ouverture de sortie, l'Ć©paulement interne Ć©tant pourvu d'une gorge annulaire qui s'Ć©tend dans le prolongement du fĆ»t de coulissement de sorte que l'Ć©paulement interne dĆ©finit une couronne annulaire qui relie la gorge annulaire Ć  l'ouverture de sortie, un piston suiveur engagĆ© Ć  coulissement Ć©tanche dans le fĆ»t de coulissement, le piston dĆ©finissant au moins une lĆØvre d'Ć©tanchĆ©itĆ© qui est reƧue dans la gorge annulaire lorsque le rĆ©servoir est vide, la couronne annulaire Ć©tant formĆ©e avec au moins une rainure radiale qui relie la gorge annulaire Ć  l'ouverture de sortie du col.
  • Avantageusement, la couronne annulaire comprend plusieurs rainures radiales. Ces rainures radiales qui relient le fĆ»t de coulissement Ć  l'ouverture de sortie du col au niveau de l'Ć©paulement interne permettent d'Ć©vacuer d'Ć©ventuelles poches d'air qui se seraient formĆ©es sous l'Ć©paulement lors du remplissage du rĆ©servoir. Ces rainures radiales sont d'autant plus utiles que le rĆ©servoir est pourvu d'une gorge annulaire pour la rĆ©ception de la lĆØvre supĆ©rieure du piston, Ć©tant donnĆ© que cette gorge annulaire a pour effet de favoriser la formation de poches d'air. Il existe donc une rĆ©elle synergie entre la gorge annulaire et les rainures radiales permettant d'une part d'augmenter le taux de restitution du rĆ©servoir et d'autre part d'Ć©vacuer l'air Ć©ventuellement emprisonnĆ© sous l'Ć©paulement et dans la gorge annulaire. Avantageusement, la gorge et ladite au moins une rainure prĆ©sentent des fonds respectifs qui se raccordent de maniĆØre continue. Ainsi, la gorge communique directement et sans discontinuitĆ© avec la rainure, permettant ainsi d'optimiser l'Ć©vacuation d'air Ć©ventuellement emprisonnĆ©. Selon une autre caractĆ©ristique intĆ©ressante, le fond de ladite au moins une rainure s'Ć©tend de maniĆØre inclinĆ©e vers le haut de la gorge vers l'ouverture. De cette maniĆØre, l'air Ć©ventuellement emprisonnĆ© peut encore trĆØs facilement ĆŖtre Ć©vacuĆ© vers l'ouverture du col. Selon une autre caractĆ©ristique de l'invention, ladite au moins une rainure prĆ©sente une section trapĆ©zoĆÆdale ou triangulaire. Cette configuration permet de favoriser l'Ć©vacuation de l'air Ć©ventuellement emprisonnĆ© tout en limitant le volume total cumulĆ© des rainures, ce qui augmente le taux de restitution.
  • Avantageusement, le piston suiveur comprend un plateau, la lĆØvre faisant saillie Ć  partir du plateau, de sorte que le plateau est en contact de la couronne lorsque la lĆØvre est reƧue dans la gorge. Cela permet encore d'accroitre davantage le taux de restitution du rĆ©servoir en minimisant au maximum son volume mort. Selon une autre caractĆ©ristique avantageuse, le piston suiveur comprend un godet central qui s'Ć©tend sensiblement dans le prolongement de l'ouverture du col pour recevoir une partie infĆ©rieure d'une pompe ou d'une valve. Selon une forme de rĆ©alisation pratique et conventionnelle, le piston suiveur comprend une lĆØvre infĆ©rieure et une lĆØvre supĆ©rieure en coulissement Ć©tanche dans le fĆ»t, la lĆØvre supĆ©rieure Ć©tant reƧue dans la gorge lorsque le rĆ©servoir est vide. De prĆ©fĆ©rence, la gorge annulaire prĆ©sente une section de forme sensiblement similaire Ć  celle de la lĆØvre.
  • L'esprit de l'invention rĆ©side dans l'optimisation du taux de restitution du rĆ©servoir Ć  piston suiveur en mĆ©nageant un logement pour la lĆØvre supĆ©rieure du piston suiveur en fin de course de celui-ci. Toutefois, cette caractĆ©ristique favorise la formation de poches d'air lors du remplissage du rĆ©servoir, l'air de ces poches Ć©tant Ć©vacuĆ© grĆ¢ce Ć  la prĆ©sence de rainures radiales qui relient la gorge annulaire Ć  l'ouverture de sortie du col.
  • L'invention sera maintenant plus amplement dĆ©crite en rĆ©fĆ©rence aux dessins joints, donnant Ć  titre d'exemples non limitatifs deux modes de rĆ©alisation de l'invention.
  • Sur les figures :
    • La figure 1a est une vue en section transversale verticale Ć  travers un rĆ©servoir de la prĆ©sente invention avec le piston suiveur en position basse,
    • La figure 1b est une vue similaire Ć  celle de la figure 1 a avec le piston suiveur en position haute,
    • La figure 2a est une vue fortement agrandie de la partie A de la figure 1b,
    • La figure 2b est une vue similaire Ć  celle de la figure 2a selon un plan de coupe diffĆ©rent, et
    • La figure 3 est une vue similaire Ć  celle de la figure 2b pour un second mode de rĆ©alisation de l'invention.
  • On se rĆ©fĆ©rera tout d'abord aux figures 1a Ć  2b pour dĆ©crire le premier mode de rĆ©alisation d'un rĆ©servoir Ć  piston suiveur selon l'invention. Le rĆ©servoir comprend trois Ć©lĆ©ments constitutifs, Ć  savoir un corps de rĆ©servoir 1, un piston suiveur 2 et optionnellement un fond 3. Ces trois Ć©lĆ©ments constitutifs peuvent ĆŖtre rĆ©alisĆ©s par injection moulage de matiĆØre plastique appropriĆ©e. Le corps de rĆ©servoir 1 peut Ć©ventuellement ĆŖtre rĆ©alisĆ© en verre, en cĆ©ramique ou en mĆ©tal.
  • Le corps de rĆ©servoir 1 prĆ©sente ici la particularitĆ© d'ĆŖtre constituĆ© de deux composants, Ć  savoir un composant externe 1 a et un composant interne 1 b, et ceci pour des raisons notamment esthĆ©tiques. En effet, le composant interne 1 b peut ĆŖtre rĆ©alisĆ© en un matĆ©riau opaque alors que le composant externe 1a peut ĆŖtre rĆ©alisĆ© en un matĆ©riau transparent de sorte que le composant interne 1 b peut ĆŖtre visible Ć  travers le composant externe transparent 1 a. Le composant externe 1 a peut par exemple ĆŖtre surmoulĆ© sur le composant interne 1 b. Ces deux composants 1a, 1 b forment ensemble le corps de rĆ©servoir 1. Dans ce contexte, on peut considĆ©rer que le corps de rĆ©servoir forme un fĆ»t de coulissement interne 11 de forme sensiblement ou parfaitement cylindrique. Ce fĆ»t est ici formĆ© par la paroi interne du composant interne 1 b. A son extrĆ©mitĆ© supĆ©rieure, le corps de rĆ©servoir 1 forme un Ć©paulement 14 de forme sensiblement annulaire qui relie le fut de coulissement 11 Ć  une ouverture de sortie 13 qui est ici dĆ©finie par un col saillant 12. La partie interne de l'Ć©paulement 14 est ici formĆ©e par le composant interne 1 b. La partie externe de l'Ć©paulement est formĆ©e par la partie externe 1 a et relie la paroi externe du corps de rĆ©servoir Ć  la partie externe du col 12. L'ouverture de sortie 13 est partiellement formĆ©e par le composant interne 1 b et le composant externe 1a. A son extrĆ©mitĆ© infĆ©rieure, le corps de rĆ©servoir 1 forme plusieurs gradins permettant une rĆ©ception fixe et dĆ©finitive du fond 3.
  • Le piston suiveur 2 est reƧu Ć  l'intĆ©rieur du fĆ»t de coulissement 11 de maniĆØre Ć  pouvoir s'y dĆ©placer de maniĆØre Ć©tanche. Le piston suiveur 2 comprend une jupe externe 20 formant une lĆØvre d'Ć©tanchĆ©itĆ© annulaire supĆ©rieure 21 et une lĆØvre d'Ć©tanchĆ©itĆ© annulaire infĆ©rieure 22 qui coulissent toutes les deux de maniĆØre Ć©tanche Ć  l'intĆ©rieur du fĆ»t 11. A partir de cette jupe 20, le piston suiveur 2 forme un plateau annulaire 23 qui s'Ć©tend vers l'intĆ©rieur jusqu'au niveau d'un godet central 24 qui forme un Ć©videment par rapport au plateau 23. Dans la configuration reprĆ©sentĆ©e sur la figure 1a, le piston suiveur 2 est dans sa position basse maximale, le godet 24 Ć©tant en contact du fond 3. Les deux lĆØvres d'Ć©tanchĆ©itĆ© annulaires 21 et 22 sont en contact avec le fĆ»t de coulissement 11. Cette configuration correspond Ć  celle dans laquelle le rĆ©servoir est rempli de maniĆØre maximale. En effet, le volume du rĆ©servoir au-dessus du piston suiveur 2 est maximal, alors que le volume dĆ©fini en dessous du piston suiveur 2 est minimal.
  • Bien que non reprĆ©sentĆ©, un organe de distribution, tel qu'une pompe sans reprise d'air, est destinĆ© Ć  ĆŖtre montĆ© sur le col 12 en s'Ć©tendant dans l'ouverture de sortie 13, de maniĆØre Ć  pouvoir prĆ©lever le produit fluide stockĆ© dans le rĆ©servoir. A chaque actionnement de la pompe, une dose de produit fluide est distribuĆ©e et une dose de produit fluide est prĆ©levĆ©e dans le rĆ©servoir. Ceci engendre une dĆ©pression Ć  l'intĆ©rieur du rĆ©servoir qui a pour effet de dĆ©placer par aspiration le piston suiveur 2 en direction de l'ouverture 13. Lorsque le piston suiveur 2 est arrivĆ© en contact de l'Ć©paulement 14, le rĆ©servoir prĆ©sente un volume minimal. On peut remarquer sur la figure 1b que le godet 24 du piston suiveur est situĆ© axialement juste en dessous de l'ouverture de sortie 13 de maniĆØre Ć  pouvoir accueillir la partie basse de l'organe de distribution (pompe).
  • Selon l'invention, l'Ć©paulement 14, au niveau oĆ¹ il se raccorde Ć  l'extrĆ©mitĆ© supĆ©rieure du fĆ»t de coulissement 11, forme une gorge annulaire 15, dans laquelle la lĆØvre d'Ć©tanchĆ©itĆ© supĆ©rieure 21 du piston suiveur 2 est reƧue, lorsque le rĆ©servoir est vide, comme reprĆ©sentĆ© sur les figures 1 b, 2a et 2b. On peut mĆŖme remarquer que la forme de cette gorge annulaire 15 en section transversale correspond grossiĆØrement ou sensiblement Ć  la forme en section transversale de la lĆØvre supĆ©rieure 21, de sorte qu'un volume mort minimal subsiste dans la gorge 15 lorsque la lĆØvre 21 y est reƧue. Une couronne annulaire 16 est ainsi formĆ©e entre la gorge annulaire 15 et l'ouverture 13. Cette couronne 16 est dĆ©finie par la paroi infĆ©rieure de l'Ć©paulement 14. D'autre part, il est avantageux que le plateau 23 vienne en contact ou Ć  proximitĆ© directe de la couronne 16. Ainsi, il ne subsiste que trĆØs peu de produit fluide entre le piston suiveur et l'Ć©paulement 14. En d'autres termes, la gorge annulaire 15 permet d'amĆ©liorer considĆ©rablement le taux de restitution de ce rĆ©servoir.
  • Selon une autre caractĆ©ristique intĆ©ressante de l'invention, plusieurs rainures radiales 17 sont formĆ©es dans la couronne 16 de l'Ć©paulement 14 : elles relient radialement la gorge annulaire 15 Ć  l'ouverture de sortie 13. Ceci est clairement visible sur la figure 2b qui est une coupe en section transversale qui passe par deux rainures radiales opposĆ©es 17. Dans cette configuration non limitative, la couronne 16 est pourvue de six rainures radiales 17. Sans sortir du cadre de l'invention, on peut prĆ©voir une seule rainure radiale. On peut Ć©galement remarquer sur la figure 2b que le fond des rainures 17 s'Ć©tend de maniĆØre alignĆ©e avec le fond de la gorge 15. Ainsi, il n'y a aucune discontinuitĆ© ou gradin ou relief ou creux entre la gorge et les rainures. Dans ce premier mode de rĆ©alisation, le fond des rainures 17 s'Ć©tend Ć  la mĆŖme hauteur axiale que le fond de la gorge 15.
  • En se rĆ©fĆ©rant au second mode de rĆ©alisation reprĆ©sentĆ© sur la figure 3, on peut voir que le rĆ©servoir est rĆ©alisĆ© de maniĆØre monobloc. En outre, on voit un autre type de rainures radiales 17' dont le fond est certes reliĆ© de maniĆØre continue au fond de la gorge 15, mais s'Ć©tend de maniĆØre inclinĆ©e vers le haut pour dĆ©boucher plus haut dans l'ouverture de sortie 13. Alors que la section transversale des rainures 17 est de forme sensiblement trapĆ©zoĆÆdale, la section transversale des rainures 17 prĆ©sente plutĆ“t une forme triangulaire.
  • Selon l'invention, la fonction des rainures radiales 17, 17' est de fournir un chemin d'Ć©vacuation pour de l'air Ć©ventuellement piĆ©gĆ© Ć  l'intĆ©rieur du rĆ©servoir au niveau de l'Ć©paulement 14. En effet, lorsque l'on remplit un rĆ©servoir Ć  piston suiveur avec un produit visqueux tel que de la crĆØme, il est trĆØs difficile de remplir la zone situĆ©e Ć  l'angle entre l'Ć©paulement 14 et le fĆ»t 11, prĆ©cisĆ©ment au niveau de la gorge annulaire 15. De ce fait, une ou plusieurs poche(s) d'air peuvent se former Ć  cet endroit, et lors du conditionnement sous vide, ces poches d'air subissent une expansion de volume trĆØs rapide ce qui peut conduire Ć  une remontĆ©e soudaine de produit fluide dans l'ouverture de sortie 13. Par consĆ©quent, il est nĆ©cessaire de pouvoir Ć©vacuer l'air de ces Ć©ventuelles poches Ć  travers l'ouverture de sortie sans qu'elles puissent subir d'expansion volumĆ©trique. Les rainures radiales 17, 17' fournissent ainsi un passage d'Ć©vacuation qui relie directement la zone de formation des poches d'air Ć  l'ouverture de sortie 13. Sans les rainures radiales de l'invention, le phĆ©nomĆØne de formation de poche d'air serait encore amplifiĆ© du fait de la prĆ©sence de la gorge annulaire 15 qui est prĆ©cisĆ©ment situĆ©e au niveau de la zone de formation des poches d'air. Ainsi, en reliant directement la gorge annulaire Ć  l'ouverture de sortie 13, les rainures radiales 17, 17' permettent de garantir une Ć©vacuation complĆØte de l'air Ć©ventuellement emprisonnĆ© sous l'Ć©paulement 14. D'autre part, en raison de leur forme trapĆ©zoĆÆdale ou triangulaire, le volume total cumulĆ© des rainures est considĆ©rablement rĆ©duit, ce qui rĆ©duit de ce fait le volume mort du rĆ©servoir lorsqu'il est vide. En effet, le volume mort du rĆ©servoir est principalement constituĆ© par le volume des rainures 17 et une partie du godet 14, Ć©tant donnĆ© que le plateau 23 vient en contact ou Ć  proximitĆ© directe de l'Ć©paulement 14 et que la gorge 15 est pratiquement entiĆØrement remplie par la lĆØvre d'Ć©tanchĆ©itĆ© supĆ©rieure 21.
  • GrĆ¢ce Ć  l'invention, non seulement le taux de restitution du rĆ©servoir est considĆ©rable accru en logeant la lĆØvre supĆ©rieure du piston suiveur dans une gorge annulaire de rĆ©ception de forme appropriĆ©e, mais encore l'air Ć©ventuellement emprisonnĆ© dans le rĆ©servoir au niveau de cette gorge annulaire peut ĆŖtre Ć©vacuĆ© Ć  travers des rainures radiales qui relient la gorge Ć  l'ouverture de sortie.

Claims (9)

  1. RĆ©servoir de produit fluide comprenant :
    - un fƻt de coulissement (11),
    - un col (12) dƩfinissant une ouverture de sortie (13),
    - un Ʃpaulement interne (14) reliant le fƻt de coulissement (11) Ơ l'ouverture de sortie (13), l'Ʃpaulement interne (14) Ʃtant pourvu d'une gorge annulaire (15) qui s'Ʃtend dans le prolongement du fƻt de coulissement (11) de sorte que l'Ʃpaulement interne (14) dƩfinit une couronne annulaire (16) qui relie la gorge annulaire (15) Ơ l'ouverture de sortie (13),
    - un piston suiveur (2) engagĆ© Ć  coulissement Ć©tanche dans le fĆ»t de coulissement (11), le piston (2) dĆ©finissant au moins une lĆØvre d'Ć©tanchĆ©itĆ© (21) qui est reƧue dans la gorge annulaire (15) lorsque le rĆ©servoir est vide,
    caractƩrisƩ en ce que la couronne annulaire (16) est formƩe avec au moins une rainure radiale (17 ; 17') qui relie la gorge annulaire (15) Ơ l'ouverture de sortie (13) du col (11).
  2. RĆ©servoir selon la revendication 14, dans lequel la couronne annulaire (16) comprend plusieurs rainures radiales (17 ; 17').
  3. RĆ©servoir selon la revendication 1 ou 2, dans lequel la gorge annulaire (15) et ladite au moins une rainure radiale (17 ; 17') prĆ©sentent des fonds respectifs qui se raccordent de maniĆØre continue.
  4. RĆ©servoir selon la revendication 3, dans lequel le fond de ladite au moins une rainure radiale (17') s'Ć©tend de maniĆØre inclinĆ©e vers le haut de la gorge annulaire (15) vers l'ouverture de sortie (13).
  5. RĆ©servoir selon l'une quelconque des revendications prĆ©cĆ©dentes, dans lequel ladite au moins une rainure radiale (17 ; 17') prĆ©sente une section trapĆ©zoĆÆdale ou triangulaire.
  6. RĆ©servoir selon l'une quelconque des revendications prĆ©cĆ©dentes, dans lequel le piston suiveur (2) comprend un plateau (23), la lĆØvre d'Ć©tanchĆ©itĆ© (21) faisant saillie Ć  partir du plateau (23), de sorte que le plateau (23) est en contact de la couronne annulaire (16), lorsque la lĆØvre d'Ć©tanchĆ©itĆ© (21) est reƧue dans la gorge annulaire (15).
  7. RƩservoir selon l'une quelconque des revendications prƩcƩdentes, dans lequel le piston suiveur (2) comprend un godet central (24) qui s'Ʃtend sensiblement dans le prolongement de l'ouverture de sortie (13) du col (11) pour recevoir une partie infƩrieure d'une pompe ou d'une valve.
  8. RĆ©servoir selon l'une quelconque des revendications prĆ©cĆ©dentes, dans lequel le piston suiveur (2) comprend une lĆØvre d'Ć©tanchĆ©itĆ© supĆ©rieure (21) et une lĆØvre d'Ć©tanchĆ©itĆ© infĆ©rieure (22) en coulissement Ć©tanche dans le fĆ»t de coulissement (11), la lĆØvre d'Ć©tanchĆ©itĆ© supĆ©rieure (21) Ć©tant reƧue dans la gorge annulaire (15), lorsque le rĆ©servoir est vide.
  9. RĆ©servoir selon l'une quelconque des revendications prĆ©cĆ©dentes, dans lequel la gorge annulaire (15) prĆ©sente une section de forme sensiblement similaire Ć  celle de la lĆØvre d'Ć©tanchĆ©itĆ© (21).
EP13815027.1A 2012-11-12 2013-11-08 Reservoir de produit fluide Active EP2916963B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1260704A FR2997934B1 (fr) 2012-11-12 2012-11-12 Reservoir de produit fluide.
PCT/FR2013/052673 WO2014072649A1 (fr) 2012-11-12 2013-11-08 Reservoir de produit fluide

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EP2916963A1 EP2916963A1 (fr) 2015-09-16
EP2916963B1 true EP2916963B1 (fr) 2017-01-04

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CN (1) CN104781015B (fr)
BR (1) BR112015010643A2 (fr)
FR (1) FR2997934B1 (fr)
WO (1) WO2014072649A1 (fr)

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US10245612B2 (en) * 2016-12-09 2019-04-02 The Boeing Company Sealant-applicator tips
CN108249025A (zh) * 2017-12-14 2018-07-06 å®ę³¢åœ£ę·å–·é›¾ę³µęœ‰é™å…¬åø äø€ē§čƒ¶ä½“åŒ…č£…ē»“ęž„
FR3083721B1 (fr) * 2018-07-12 2020-12-18 Aptar France Sas Dispositif de distribution de produit fluide et son procede de remplissage et de bouchage.
IT201900010878A1 (it) * 2019-07-04 2021-01-04 Baralan Int S P A Contenitore dotato di un erogatore airless per un prodotto cosmetico.
CN112893305B (zh) * 2021-01-19 2022-02-18 青岛大学附属医院 äø€ē§åŒ»ē–—ę£€éŖŒē§‘ē”Øå™Øēšæēš„ęø…ę“—ę¶ˆęÆ’č®¾å¤‡

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CH674191A5 (fr) * 1987-10-01 1990-05-15 Juvena Produits De Beaute S A
DE58903718D1 (de) * 1988-10-03 1993-04-15 Plasco Sa Als spender fuer pastoese produkte ausgebildete dose.
EP0666823B1 (fr) * 1993-08-20 1998-12-16 Wilhelm A. Keller Dispositif de mesure et de dosage proportionnel de plusieurs constituants a cartouche pliante
FR2761667B1 (fr) * 1997-04-07 1999-06-18 Valois Sa Ensemble pour la distribution d'un produit pateux ou d'un gel
DE19940713A1 (de) * 1999-02-23 2001-03-01 Boehringer Ingelheim Int Kartusche fĆ¼r eine FlĆ¼ssigkeit
DE10017438A1 (de) * 2000-04-07 2001-10-11 Otto Katz Cremespender
DE10121381C1 (de) * 2001-05-02 2002-10-24 Henkel Kgaa Spendervorrichtung fĆ¼r eine cremefƶrmige oder durch Bestreichen einer OberflƤche sich abtragenden Masse
CN1263552C (zh) * 2003-07-30 2006-07-12 安伟 ęŠ½ēœŸē©ŗ式喷雾ē“¶
FR2903672B1 (fr) * 2006-07-11 2008-09-12 Oreal Dispositif de conditionnement a double enveloppe
DE102008063502A1 (de) * 2008-12-17 2010-06-24 Fischbach Kg Kunststoff-Technik Auspresswerkzeug
ITMI20091648A1 (it) * 2009-09-25 2011-03-26 Modapack S R L "gruppo per la pressurizzazione e l'erogazione di sostanze fluide per una pompa ad azionamento manuale e pompa comprendente detto gruppo"
US8631975B2 (en) * 2011-04-25 2014-01-21 Toly Korea, Inc. Airless pump and cosmetic container having the same

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Publication number Publication date
US9511391B2 (en) 2016-12-06
FR2997934B1 (fr) 2015-06-19
US20150239003A1 (en) 2015-08-27
EP2916963A1 (fr) 2015-09-16
CN104781015B (zh) 2017-03-22
BR112015010643A2 (pt) 2017-07-11
FR2997934A1 (fr) 2014-05-16
WO2014072649A1 (fr) 2014-05-15
CN104781015A (zh) 2015-07-15

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