EP2036617A1 - Dispensing pump of a container for storing and dispensing a product and container equipped with such a pump - Google Patents

Abstract

The pump (2) has a dip tube (5) comprising an end (6) that is inserted in a product storage and distribution container (1) for drawing a product. The tube has a product dispensing end (8) to dispense the product to an outlet of a variable volume pump chamber. The tube is obtained by an extrusion of a flexible plastic material or elastomer e.g. styrene-butadiene rubber. A deformable elastic portion (9) is extended between lower and upper valves (10, 11) of the tube, and defines the chamber, where the valves are connected and maintained in the tube by friction. An independent claim is also included for a method for dispensing a product by using a pump.

Description

The present invention relates to a dispensing pump for mounting on a product storage and dispensing container for dispensing a product stored therein.

More particularly, the invention relates to such a pump, wherein the product distribution is effected by deforming a pumping chamber of variable volume, manually or by means of an actuating member.

Such pumps are already known in the state of the art. We thus know, by the document EP-B-0 900 598 , a pump for a fluid cosmetic product, which comprises an elastically deformable pumping chamber under the action of a push button and which is associated with a product inlet valve, which valve communicates with a container on which the pump is mounted, and a product dispensing valve through which the product is delivered at the outlet of the pump.

According to the pump described in this document, the actuation of the push button is made in a general direction coaxial with the container, which greatly limits the possibilities of use of the pump.

In addition, this pump has a relatively high number of parts, which affects its manufacturing cost and the preservation of the environment.

It is also known from the document EP-A-1,243,216 , a dispensing pump for dispensing a shampoo which comprises, mounted in a cylindrical support itself attached to the neck of a container, a dip tube, a pumping chamber and an axially actuated dispensing member. Valves are provided on both sides of the distribution chamber.

As indicated previously, according to the arrangement described in this document, the actuation is carried out in a direction coaxial with the tube. In addition, the pump also has a relatively large number of parts, which makes its manufacture relatively expensive.

Furthermore, according to this arrangement, the pumping chamber is in the form of a bellows, which requires its realization separately from that of the dip tube and the actuating member. In addition, the use of a bellows does not effectively control the deformation suffered from the pumping chamber at actuation, which leads to poor control of the dispensed dose and poor repeatability of doses distributed. The use of a bellows also has reliability problems, particularly when using a large diameter pumping chamber, the bellows being likely to break in the long run.

In order to increase the ergonomics, it has been proposed to make the pumping chamber so as to make it deformable radially, either manually or under the action of a trigger with a control arm that comes, in operation, press laterally on the deformable wall of the pumping chamber.

In this regard, reference may be made to the document FR 2,141,309 which describes such an arrangement.

But the pump described in this document still has a relatively high number of parts, which makes its manufacturing cost relatively high.

It has also been proposed to make the pumping chamber in the form of a flexible tube which can extend into the reservoir to form a dip tube.

The documents FR 1 508 161 ; GB-A-2 182 726 ; US 4,631,008 ; US 3,066,832 ; US 3,881,641 and FR 2,389,105 provide indications for the realization of such pumps.

The pumps described in these documents are actuated by means of a trigger, which generally requires distributing the product in a single position, head up or head down.

In any case, the tube used to make the pumping chamber does not have a valve, so that if the pump is not used over a long period, the product may be damaged and the pump clogged, especially if the product is viscous.

Moreover, in many solutions recommended by the state of the art, the doses likely to be distributed are relatively small.

We can finally refer to the document FR 2,341,518 which further describes another type of dispensing pump which comprises a dip tube inserted into a container and having, internally, two valves defining a pumping chamber, and an actuating member of the pumping chamber to come deform radially.

But the plunger tube is here made in two parts and comprises, particularly at the level of the pumping chamber, a flexible inner tube and a cover member of this tube. This covering member comprises a rigid outer tube, or sleeve, fixed on the neck of the container, the actuating member having a tail inserted between the elastically deformable tube and the rigid tube and biasing a portion of the dip tube located at inside the container volume.

Therefore, the plunger tube has a relatively complex structure whose assembly is hardly compatible with high production rates.

In addition, the covering member made of metallic material, being in contact with the product, may be at the origin of unwanted interactions with said product and in particular may cause physico-chemical modifications of the product, such as staining. said product.

In view of the above, there is therefore a need for a pump that overcomes all or part of the aforementioned drawbacks and, in particular, which is both aesthetically attractive, ergonomic and relatively simple to manufacture, and this at low cost.

• une chambre de pompage de volume variable et
• un tube plongeur comportant une première extrémité apte à être insérée dans le récipient pour y prélever le produit et une deuxième extrémité de distribution de produit en sortie de la chambre de pompage.

The invention therefore has, according to one of its aspects, a dispensing pump intended to be mounted on a product storage and dispensing container, comprising:

• a pumping chamber of variable volume and
• a dip tube having a first end adapted to be inserted into the container to take the product and a second product distribution end outlet of the pumping chamber.

According to a general characteristic of this pump, the plunger tube comprises two valves and comprises at least one elastically deformable portion extending between said valves and defining said pumping chamber.

The invention thus makes it possible, by virtue of the production of the pumping chamber in the form of an elastically deformable portion of a dip tube delimited by two product inlet valves in the chamber and of product distribution, to provide a pump from a very small number of parts and therefore low cost, and that allows to offer several gestures of actuation, while reducing the risk of tampering with the product. In particular, such a pump can be made from a single type of material, thus presenting an interest from a point of view of the recycling of the parts used.

In addition, the tube is, according to another characteristic of the invention, made by extrusion. The manufacture and assembly of the pump, and in particular the production of the dip tube, are thus considerably simplified.

Therefore, advantageously, said elastically deformable portion and said dip tube are made integrally.

Advantageously, the first end has an end zone recessed relative to a free end of the tube.

It is thus possible to extend the dip tube to the bottom of the container, or even in contact with the bottom, to collect the product, without the free end of the dip tube is closed by the bottom wall.

Thus, in one embodiment, the first end of the tube comprises a notch.

For example, the first free end of the tube comprises at least one slit of particular triangular section, square or rectangular.

Alternatively, the first free end of the tube is tapered or is generally corrugated.

According to a preferred embodiment and which does not generate waste, this first end of the tube is cut in a facilitated manner in a linear and sequential process. The chosen shape allows a portion of the dip tube to be in contact with the bottom of the container while allowing a product sample contained in this container.

According to another characteristic of the pump according to the invention, at least one of the valves is attached to the tube and is held in said tube by friction, clamping or fitting.

It will be noted that, for example, the tube has at rest a cross section of constant size.

Advantageously, the section of the tube has a dimension, in particular a diameter, of between 3mm and 15mm, preferably between 8mm and 12mm, and in particular of about 10mm.

The tube may also be advantageously engaged, if necessary fixing, directly with the neck of the container. In other words, the outer wall of the tube may come into engagement with the inner wall defined by the mouth of the container.

In various embodiments, at least one of the valves is formed by a member selected from a ball valve, a disc valve, a slit valve, a flap valve movable in translation, a flapper flap pivotally mounted, and a needle valve.

According to yet another characteristic of the invention, the second end of the tube comprises a self-enclosing peripheral wall capable of opening under the effect of an overpressure generated during the deformation of the pumping chamber.

In an exemplary embodiment, the pump further comprises a product applicator mounted on the second end of the tube.

It may also include an actuator member of the pump adapted to deform the pumping chamber. The organ Actuation can be adapted to create a depression within the tube. It can be positioned between a dispensing valve and a mouth of the container defining a mounting aperture for said tube. More generally, the actuating member may extend between said opening and the dispensing head. This actuating member may be removably mounted, if necessary so as to be interchangeable.

This actuating member can thus be provided on an outer portion of the tube projecting from the container. In other words, this member may extend out of the interior volume defined by the container, and possibly exclusively. The mouth may itself itself form an actuating surface by serving, for example, to the user of the biasing surface to deform the section of the tube, in particular by folding or bending. This outer portion may still be large enough to allow digital actuation of the user on the tube, such as by compression of the tube.

The dispensing valve may also be provided in the outer portion of the dip tube protruding from the container. The inlet valve can be inscribed in the interior volume of the container. Alternatively, the intake valve may also be provided outside this volume.

For example, the actuator comprises a collet.

It may also include a tab adapted to allow a torsion of the tube.

The actuating member may further comprise an elongation member of the tube.

For example, the actuating member comprises a trigger provided with a first manually actuable end zone and a second end zone opposite to the first zone relative to an axis of articulation of the trigger and subject to the tube.

The invention also relates, in another aspect, to a storage and dispensing container of a product comprising a reservoir for storing said product. This container further comprises a pump as defined above.

According to another characteristic of the container, the first end of the dip tube extends into the reservoir to the vicinity of a bottom of said tank, or in contact with said bottom.

In one embodiment, the reservoir comprises a flexible bag on which the pump is mounted.

The container further comprises an outer rigid shell surrounding the reservoir.

In another embodiment, the reservoir is made of rigid material, said pump comprising a return air passage.

• déformation du tube plongeur par réduction localisée de la section du tube au moins dans une zone située entre les clapets ;
• récupération d'une dose de produit ; et
• remplissage de la chambre de pompage par relâchement du tube.

The invention also relates to a method of dispensing a product by means of a pump as defined above, this method comprising the steps of:

• deformation of the dip tube by localized reduction of the section of the tube at least in an area between the valves;
• recovery of a dose of product; and
• filling the pumping chamber by loosening the tube.

In one embodiment, during the deformation of the tube, the tube is deformed by bending.

It is also possible to deform the tube by compression.

The tube can also be deformed by elongation of said tube.

Alternatively, the tube may be twist deformed.

• une chambre de pompage de volume variable et
• un tube plongeur comportant une première extrémité apte à être insérée dans le récipient pour y prélever le produit et une deuxième extrémité de distribution de produit en sortie de la chambre de pompage,

dans laquelle le tube plongeur définit un axe d'allongement et ayant une section transversale au repos de dimension sensiblement constante, ledit tube comportant deux clapets, au moins une portion élastiquement déformable s'étendant entre lesdits clapets délimitant ladite chambre de pompage. Un tel tube pourrait alors être réalisé de préférence par extrusion, ou autrement par rotomoulage ou moulage-injection.The invention also relates to a dispensing pump intended to be mounted on a product storage and dispensing container, comprising:

• a pumping chamber of variable volume and
• a dip tube having a first end adapted to be inserted into the container to take the product and a second end of the product distribution at the outlet of the pumping chamber,

wherein the dip tube defines an axis of elongation and having a cross section at rest of substantially constant dimension, said tube having two valves, at least one elastically deformable portion extending between said valves defining said pump chamber. Such a tube could then be made preferably by extrusion, or otherwise by rotational molding or injection molding.

• une chambre de pompage de volume variable et
• un tube plongeur comportant une première extrémité apte à être insérée dans le récipient pour y prélever le produit et une deuxième extrémité de distribution de produit en sortie de la chambre de pompage,

dans laquelle ledit tube comporte deux clapets, au moins une portion élastiquement déformable s'étendant entre lesdits clapets délimitant ladite chambre de pompage et dans laquelle ce tube comporte une partie externe au récipient actionnable manuellement par l'utilisateur par appui digital directement au contact de ladite portion ou au moyen d'un organe d'actionnement de la distribution de produit rapporté autour de cette partie externe.The invention also relates to a dispensing pump intended to be mounted on a product storage and dispensing container, comprising:

• a pumping chamber of variable volume and
• a dip tube having a first end adapted to be inserted into the container for taking the product and a second product distribution end at the outlet of the pumping chamber;

wherein said tube comprises two valves, at least one elastically deformable portion extending between said valves defining said pump chamber and wherein said tube comprises a portion external to the container manually actuatable by the user by digital support directly in contact with said portion or by means of an actuating member of the reported product distribution around this outer portion.

• une chambre de pompage de volume variable et
• un tube plongeur comportant une première extrémité apte à être insérée dans le récipient pour y prélever le produit et une deuxième extrémité de distribution de produit en sortie de la chambre de pompage,

dans laquelle ledit tube comporte deux clapets, au moins une portion élastiquement déformable s'étendant entre lesdits clapets délimitant ladite chambre de pompage, ladite pompe comprenant des moyens de torsion du tube faisant office d'organe d'actionnement de la distribution de produit.The invention also relates to a dispensing pump intended to be mounted on a product storage and dispensing container, comprising:

• a pumping chamber of variable volume and
• a dip tube having a first end adapted to be inserted into the container for taking the product and a second product distribution end at the outlet of the pumping chamber;

wherein said tube comprises two valves, at least one elastically deformable portion extending between said valves delimiting said pumping chamber, said pump comprising means for twisting the tube acting as actuating member of the product distribution.

• la figure 1 est une vue en perspective d'un récipient de stockage et de distribution de produit équipé d'un exemple de réalisation d'une pompe selon l'invention ;
• la figure 2 est un schéma de principe illustrant le fonctionnement de la pompe de la figure 1 ;
• la figure 3 illustre une première variante de la pompe de la figure 1 ;
• la figure 4 montre une deuxième variante de la pompe de la figure 1 ;
• la figure 5 illustre le principe de fonctionnement de la pompe de la figure 4 ;
• la figure 6 montre une troisième variante de la pompe de la figure 1 ;
• la figure 7 illustre le principe de fonctionnement de la pompe de la figure 6 ;
• la figure 8 est un schéma de principe illustrant un autre mode d'utilisation d'une pompe selon l'invention ;
• la figure 9 est une vue en perspective d'une quatrième variante d'une pompe selon l'invention, mettant en oeuvre le principe illustré à la figure 8 ;
• les figures 10 à 19 illustrent divers modes de réalisation des clapets entrant dans la constitution d'une pompe selon l'invention ;
• les figures 20 à 22 illustrent schématiquement diverses formes de réalisation de l'extrémité libre du tube plongeur ; et
• la figure 23 illustre un mode de mise en oeuvre d'une pompe selon l'invention.

Other objects, features and advantages of the invention will become apparent on reading the following description, given solely by way of nonlimiting example and with reference to the appended drawings in which:

• the figure 1 is a perspective view of a product storage and dispensing container equipped with an embodiment of a pump according to the invention;
• the figure 2 is a schematic diagram illustrating the operation of the pump of the figure 1 ;
• the figure 3 illustrates a first variant of the pump of the figure 1 ;
• the figure 4 shows a second variant of the pump of the figure 1 ;
• the figure 5 illustrates the operating principle of the pump of the figure 4 ;
• the figure 6 shows a third variant of the pump of the figure 1 ;
• the figure 7 illustrates the operating principle of the pump of the figure 6 ;
• the figure 8 is a block diagram illustrating another mode of use of a pump according to the invention;
• the figure 9 is a perspective view of a fourth variant of a pump according to the invention, implementing the principle illustrated in FIG. figure 8 ;
• the Figures 10 to 19 illustrate various embodiments of the valves used in the construction of a pump according to the invention;
• the Figures 20 to 22 schematically illustrate various embodiments of the free end of the dip tube; and
• the figure 23 illustrates a mode of implementation of a pump according to the invention.

On the figure 1 , schematically and in perspective, a storage container 1 and product distribution provided with a pump 2 according to the invention is shown.

In the position illustrated in figure 1 , the assembly comprises a general axis XX 'shown in a supposed vertical position.

In the exemplary embodiment shown, the container 1 comprises a reservoir provided with a closed lower end 3 and an upper open end 4 forming a neck, on which is mounted the pump 2, for example by screwing.

The container is for example intended to contain a cosmetic or care product. "Cosmetic product" means a product as defined in Council Directive 93/35 / EEC of 14 June 1993.

But it is not beyond the scope of the invention when any other fluid, liquid or viscous product is contained in the container 1 and distributed by the pump 2.

As we see on the figure 1 , the pump 2 essentially consists of a dip tube 5 which has a lower end 6 through which the product contained in the container 1 is introduced into the tube 5 and which extends into the container in the direction of the closed lower end 3 of the container 1, in particular in contact with the bottom wall 7 of the container, and an upper opposite end 8 which extends outside the container and through which the product is distributed at the outlet of the pump.

The tube 5 advantageously has at rest a cross section of constant size. This section is advantageously circular but could also be polygonal, especially square, or oval. This section may have a dimension and in particular a diameter of between 3 mm and 15 mm, more preferably between 8 and 12 mm and in particular about 10 mm.

The lower end 6 of the dip tube may extend in contact with or at most 10 mm from the bottom wall of the container.

The tube 5 can be mounted on the container by means of a fastener. This fixing member may comprise a ring snap, screw, crimp, or snug fit onto container neck.

For example, in the middle part, the tube 5 is provided with a threaded ring b, mounted by screwing on the neck of the container and ensuring a maintenance of the tube 5, for example by friction.

The container may further be provided with a cap (not shown) capping the upper end of the tube.

Referring also to the figure 2 , the operation of the pump is essentially based on the deformation of a pump head formed by a portion 9 of the tube 5 accessible manually, which therefore extends outside the container 1.

Thus, the plunger tube 5 is at least partly made of an elastically deformable material, in particular the portion 9. For example, for a tube with an inside diameter of 10 mm and an outside diameter of 14 mm, the stiffness constant of the tube, measured axially at average of a texturometer, is 4000N / m. However, regardless of the chosen internal and external diameters, the stiffness constant of the tube is advantageously between about 3000 N / m and about 6000 N / m, to ensure both comfortable and efficient operation of the pump.

The tube 5 and the portion 9 are made in one piece.

Advantageously, the tube 5 is made in one piece by extrusion of a flexible plastic material. Alternatively, this tube could also be made by molding such as a rotational molding or injection.

However, extrusion of the tube is also advantageous insofar as it makes it possible to produce a tube of great length, for example longer than three centimeters, in particular longer than eight centimeters, and more particularly longer than twelve. centimeters, and this with a constant diameter.

The tube 5 is also advantageously single-walled, that is to say that it has no sheath or external wall. Preferably, all the components of the pump are made of the same type of material such as plastic material (s).

In the exemplary embodiment illustrated in figures 1 and 2 the deformation is effected by manually gripping the tube 5, in the portion 9 forming the pump body, and in particular by pressing it between two fingers D, for example between the thumb and the index, so as to exert a force in a radially internal direction (arrow F1).

As we see on the figure 2 , which illustrates the principle of operation of the pump, the zone 9 manually operable is delimited by a low valve, referenced 10 and a high valve, referenced 11, arranged vis-à-vis so as to operate in the same direction.

It should be noted in this respect that, thanks to the one-piece production of the tube, and in particular thanks to its extrusion, it is possible to produce a dip tube which comprises an elastically deformable zone delimiting a pumping chamber and further incorporating flapper S.

In the example shown, the up and down valves are constituted by ball-type valves, such as B, resting, in the rest position, on a seat S. They are each arranged in the tube 5 so that when an overpressure generated when a force, here transversal, is applied to the tube so as to cause a subsequent deformation generating a localized section reduction, one of the valves, namely the bottom valve 10 closes, while the another valve, namely the top valve 11 opens (arrow F2) and a dose of product is distributed through the top valve 11 and to the pump outlet (arrow F3).

After dispensing the product, when the tube 5 is released, the elastically deformable zone 9 returns to its initial position. The consecutive depression causes closure of the top valve 11, an opening of the bottom valve 10 and a subsequent filling of the deformable zone 9 of the plunger tube.

In other words, the zone 9 elastically deformable and manually operable plunger tube 5 constitutes a pumping chamber of variable volume delimited axially by the low and high valves, which can be locally compressed to reduce its volume and cause a distribution of a dose of product, the pumping chamber taking, after relaxation, its initial volume for the product admission, thanks to the elasticity of the constituent wall of the tube. The lower end 6 of the tube 5 is therefore provided upstream of the pumping chamber while the upper end 8 extends downstream of the pumping chamber.

The skilled person will therefore realize the tube and in particular the pumping chamber from a material capable of being easily deformed manually while avoiding any inadvertent actuation of the pump and able to resume its initial position while aspirating the product and this, depending on the nature of the product to be sucked.

As indicated above, the embodiment of the tube by extrusion is advantageous insofar as it allows the production of a tube and in particular a pumping chamber for better control of the dose of the product dispensed.

In this respect, it will be possible to choose a material having a shore hardness of less than 45 D and a flexural modulus of less than 200 MPa.

By way of example, the tube 5 may be made of elastomer, for example elastomers of the SBR or CR type, such as the elastomers marketed under the reference Neopren® or Baypren®, of EPDM or EPM type, such as marketed neoprenes. under the references Vistalon®, Polysar EPM®, Buna EP® or Nordel®, of the FPM or FKM type, such as the elastomers sold under the trade references Technoflon®, Fluorel®, Aflas® or Viton®, of the MQ, MVQ type, MPQ, FVMQ or FMQ, such as the elastomers marketed under the trade names Tygoprene®, Syloprene®, Sylastic®, FSE®, Sylon®, Elastosil®, or Rhodorsil®, EVM type, such as Levapren elastomers, Levamelt®, Baymod L @, or type AU or EU.

TPO or TPV type thermoplastic elastomers may also be used, such as the elastomers marketed under the reference Engage®, Santoprene®, Trefsin®, Sarlink® or Alcryn®, or of the SBC, TPU, PEBA or propylene-based type. Ethylene, such as elastomers marketed under the reference Multiflex TPE®, Pebax® or Adflex®.

However, it will also be possible to use flexible thermoplastics, of the EVA or VLDPE type, such as the thermoplastics marketed under the references Evatane®, Greenflex®, Escorene Ultra® or Clearflex®.

The arrangement which has just been described makes it possible to produce a pump consisting essentially of a dip tube provided internally with two bottom and top valves which delimit between them a pumping chamber and therefore with a reduced number of parts, which is reflected in advantageously on its manufacturing cost but also on the protection of the environment.

In addition, thanks to the realization of the pump with a reduced number of parts, it minimizes the number of different types of materials in contact with the fluid to be circulated. Moreover, the actuation of the pump by manual deformation of the plunger tube makes it possible, as will be described in detail below, a great flexibility of use by allowing different gestures and also allows a particularly quiet operation.

Thus, for the same tube, it is possible to deform the pumping chamber in various ways, by elongation, by kinking, by friction, ...

Note also that in use, the amount of product dispensed depends on the extent of deformation of the tube. Indeed, the dose of product dispensed by the pump is equal to the volume variation caused by the mechanical deformation exerted on the flexible tube. It is therefore possible to deliver different doses from one use to another, depending on the wishes of the user and, where appropriate, to deliver large quantities of product.

It will also be noted that, while in the embodiment described, the tube may be mounted on the container by means of a fastener, it may also alternatively mount the tube so that it comes into engagement directly with the inner wall of the neck so that the neck ensures the maintenance of the tube by friction so as to obtain a tight assembly, the fixing ring can then be omitted ,.

Finally, note that, in order to facilitate the use of the pump, the upper end 8 may be provided with a dispensing member. In this respect, as illustrated in figure 1 , provide the tube 5 with a dispensing head 12, for example fitted on the upper end 8 of the tube to facilitate distribution, in particular to increase the accuracy. In particular, the dispensing head could comprise a conduit of reduced section or could be provided with a nozzle provided with a swirling system.

Of course, alternatively, it will be possible to mount on the upper end of the tube 5 other types of applicator or dispensing member. Organs of type, porous element, ball, ... can be used in this regard.

The invention is of course not limited to the embodiment described and other embodiments are illustrated in FIGS. Figures 3 to 23 .

While in the embodiment described above with reference to figures 1 and 2 , the deformation of the tube is effected by manually pressing the tube between two fingers D, with reference to the figure 3 it is possible to equip the pump head with an actuator of the pump.

But it should be noted that in these various embodiments, the pumping chamber extends at least partly outside the container. In other words, when it is intended to be maneuvered manually, the user can easily position his fingers on the elastically deformable pumping chamber to operate manually. Similarly, when using an actuator, it is mounted outside the container so that it can be replaced in case of malfunction or change it if you want to change operating mode of the pumping chamber.

In the exemplary embodiment shown in this figure, the tube is provided with a clamp P whose two branches 13 and 14 locally surround the manually accessible zone 9 and can be brought closer manually (arrow F4) to come transversely deform the tube. The clamp P can be made of elastically deformable material able to avoid preventing the filling of the pumping chamber. Alternatively, the clamp may be made of rigid material, non-deformable, and provided with a joint brought to the rest relaxed position, thanks to the flexibility of the tube.

Furthermore, whereas in the embodiments described above, the deformation of the tube is carried out by compression, it is also possible, alternatively, as illustrated in FIGS. figures 5 and 6 , to provide deformation of the tube by flexion (arrow F5).

In this embodiment, which differs essentially from the embodiments described above from the operating mode of the pump head, from a rest position in which the tube extends substantially along the axis XX Of the container, it is simply necessary to exert a lateral force on the free end 8 of the tube so as to bend it and thus generate a reduction of localized section resulting in a consequent decrease in the volume of the pumping chamber.

It will then be possible to provide the free end of the tube with a fixed abutment made for example in the form of a relief 15 in order to facilitate the actuation of the head of the pump. But, alternatively, the mouth of the container, and in particular the inner edge defining the opening of this mouth, can form an actuating surface of the pumping chamber by bending the tube at this level.

According to a third variant, illustrated in Figures 6 and 7 the deformation of the pumping chamber is effected by twisting the tube. This twist can be achieved by twisting the tube by applying a twisting force on the tube and thereby reducing the volume of the pumping chamber. As visible on the figure 6 we can then provide the head of the pump with a tab 16 to facilitate the application of the torsional force (arrow F6).

Referring now to the figure 8 , the deformation of the tube can still be effected by elongation.

In other words, when a tensile force is exerted on the tube, the subsequent deformation causes a section reduction along the pumping chamber and a product distribution through the top valve 11.

On the contrary, when the tube is released, the pumping chamber returns to its initial position (arrow F7), which causes a depression in the pumping chamber, a closure of the top valve 11, an opening of the bottom valve 10 ( arrow F8) and product suction through the bottom valve 10 (arrow F9).

Referring to the figure 9 to facilitate the elongation of the tube, it will be possible to provide on the ring b an elongation member comprising a trigger 17 comprising a first end zone 17a manually operable in a generally transverse direction (arrow F10), a second zone of end 17b secured to the free end 8 of the tube and a medial portion 17c supported or articulated on a base 18 integral with the ring b

In this embodiment, the distribution is effected in a substantially transverse or essentially oblique direction, relative to the general axis XX 'of the tube, the pumping chamber being then configured so as to form an elbow inserted and guided in a groove. 19 practiced in the base.

For example, in this embodiment, the second free end 17b forms a fork on which rests a flange 20 made in the vicinity of the free end of the tube 5 and, in particular, the face of the flange located opposite the the end of the tube 5. Therefore, by exerting pressure on the first end zone 17a, the fork 17b exerts a lateral or generally oblique force on the flange 20 and, consequently, causes an elongation of the pumping chamber .

This elongation deformation causes a decrease in the section of the tube and a distribution of a dose of product corresponding to the extent of the deformation.

After loosening, the elasticity of the tube causes, on the one hand, the filling of the pumping chamber and, on the other hand, a replacement of the trigger in its initial position.

As indicated above, in the various embodiments described, the pumping chamber is delimited by a bottom valve 10 and a top valve 11. In the embodiment visible on the figures 1 , 2 and 8 , the up and down valves are each constituted by a ball valve.

In this case, as shown in figure 10 , the valve comprises a body 22 which comprises a generally cylindrical external peripheral surface and a bottom provided with one or more passages 23 and which internally comprises a housing for receiving a ball B delimited on the one hand by the bottom 23 and on the other hand, by an annular seat 24 against which the ball B rests in the open position of the valve.

But one can also use, instead of a ball valve, a slit valve ( figure 11 ), a mobile disk flap ( Figures 12 and 13 ), in which a disk 25 held by lateral branches, such as 26, elastically deformable closes a product flow orifice, or a flap valve movable in translation ( figure 14 ), a needle valve ( figure 15 ) or a pivotally mounted flapper ( figure 16 ).

Note, however, that in the embodiment illustrated in Figures 12 and 13 , the valve is made of a flexible material, for example flexible elastomer. Although it has the disadvantage of creating a constriction, it remains very simple to achieve.

In the various embodiments envisaged, the valve 11 for introducing product into the chamber may be provided in the interior volume of the container, while the product dispensing valve 10 may extend outside the container, c that is to say beyond the neck of the container.

It will be noted in this regard that, as indicated above, the pumping chamber extends at least partly outside the container. In other words, the dip tube comprises a portion that fits into the container and is thus inscribed in the interior volume of the container and which extends to the level of the mouth of the container and a portion external to the container , protruding out of the container and its mouth. This protruding part can be used for the attachment of the actuating member.

At least the inner portion may be devoid of covering sheath or outer sheath, over at least 50% of its height, preferably over 75% of its height, and preferably over its entire height, so that over its height according to which the tube is intended to be inserted into the tube in contact with the product, the volume reserved for the product in the container may be greater. It can also be provided that at least the outer portion of the tube is devoid of cover member. The tube may optionally be devoid of cover member over its entire height, possibly except for a section for fixing a dispensing head. This partial or complete absence of cover member can avoid any physico-chemical changes in the product contained in the container, especially when the cover member is made of metal material (s).

Referring to Figures 17 to 19 , as regards the top valve 11, the second end 8 of the pumping chamber can also be produced in the form of a self-enclosing peripheral wall, that is to say closed in the rest position ( Figures 17 and 18 ). On the contrary, when an overpressure is created in the pumping chamber, this end opens spontaneously so as to let the fluid flow. When the pumping chamber is released, the end of the pumping chamber closes spontaneously for product admission into the chamber.

In the various embodiments envisaged at the Figures 10 to 16 , the valves are preferably made in the form of an insert member inserted into the plunger tube 5 and maintained in the latter by friction, tightening or fitting. This embodiment has the advantage of reducing costs and increasing ease of use.

Thanks to the embodiment of the plunger tube from an elastically deformable material, the valves are held in place by the deformation of the tube. Advantageously, then, valves are provided whose length is greater than the diameter.

In the various embodiments, the dip tube 5 is preferably made so that its free end bears against the bottom surface 7 of the container 1. Thus, in use, the container 1 can be completely emptied suction of the liquid in the bottom of the container is then facilitated.

However, in order to prevent the bottom wall 7 from being sucked up and clogging the lower end 6 of the dip tube, this end will be shaped so that it has an end zone 27 set back from the end 28. For example, with reference to figure 20 this recessed area may be in the form of a generally triangular, square or rectangular slot. But it is also possible, alternatively, to configure the free end in the form of a bevel ( figure 21 ) or in a wavy form ( figure 22 ). These different forms are grouped under the common meaning of notch.

Finally, it should be noted that the pump system which has just been described can advantageously be used in "airless" type packaging, that is to say packaging in which the products are stored in the absence of air. In this case, as illustrated on the figure 23 , the container essentially comprises a flexible bag 29 on which the pump 2 is mounted. The tank may also comprise an outer rigid shell 30 serving to mask or protect the flexible bag 29.

But it is also possible to use the pump that has just been described on rigid containers. In this case, there will be provided, in the pump, air intake passages used in particular to reduce the atmospheric pressure inside the container before or during the filling the room. However, the air intake can be obtained by taking advantage of the flexibility of the tube.

Note finally that the invention is of course not limited to the embodiments described or envisaged. In particular, the embodiments according to which the tube is produced integrally by extrusion, the embodiments in which the tube has at rest a cross section of constant dimension, the embodiments according to which the elastically deformable pumping chamber is accessible from the outside and the embodiments according to which use is made of actuating means for the pumping chamber by twisting or twisting of the tube can be envisaged independently of each other and, where appropriate, combined with all the other variants envisaged previously.

Claims (15)

Dispensing pump for mounting on a container (1) for storing and dispensing a product, comprising: a pumping chamber of variable volume and - a dip tube (5) having a first end (6) adapted to be inserted into the container to collect the product and a second end (8) of product distribution at the outlet of the pumping chamber, characterized in that the dip tube is made by extrusion and comprises two valves (10, 11), at least one elastically deformable portion (9) extending between said valves defining said pump chamber. Pump according to claim 1, characterized in that said elastically deformable portion and said dip tube are made integrally. Pump according to one of claims 1 and 2, characterized in that the stiffness constant of the tube is between about 3000N / m and about 6000N / m, preferably equal to 4000N / m. Pump according to any one of claims 1 to 3, characterized in that at least one of the valves (10, 11) is attached to the tube and is held in said tube by friction. Pump according to any one of claims 1 to 4, characterized in that the tube has at rest a cross section of constant size. Pump according to any one of claims 1 to 5, characterized in that the tube is engaged directly with the neck of the container. Pump according to any one of claims 1 to 6, characterized in that it comprises an actuating member positioned between a dispensing valve and a mouth of the container defining a mounting aperture for said tube. Pump according to any one of claims 1 to 7, characterized in that it comprises an actuating member of the pump adapted to deform the pumping chamber, the organ actuator comprising a member selected from a clamp (P) clamping, a tab (10) adapted to allow torsion of the tube, a member (17) of elongation of the tube. Pump according to claim 8, characterized in that the actuating member comprises a trigger (17) provided with a first manually operable end zone (17a) and a second end zone (17b) opposite to the first end zone relative to a hinge axis of the trigger and secured to the tube. A storage and dispensing container for a product comprising a reservoir for storing said product, characterized in that it comprises a pump (2) according to any one of claims 1 to 9 mounted on the reservoir. Container according to claim 10, characterized in that the reservoir comprises a flexible bag (29) on which the pump (2) is mounted. Container according to claim 11, characterized in that it further comprises a rigid outer shell (30) surrounding the reservoir. Container according to claim 10, characterized in that the reservoir is made of rigid material, said pump comprising a return air passage. Method for dispensing a product by means of a pump according to any one of Claims 1 to 9, characterized in that it comprises the steps of: deformation of the dip tube (5) by localized reduction of the section of the tube at least in a zone situated between the valves (10, 11); - recovery of a dose of product; and - filling the pumping chamber by loosening the tube. The method of claim 14, wherein during deformation of the tube, the tube (5) is deformed by bending, compression, elongation or torsion.

Images