SYSTEM AND METHOD FOR REFILLING A BOTTLE WITH VISCOUS LIQUID

Abstract

A system for refilling a refillable bottle (10) with viscous liquid from a source bottle (30) inverted over the opening of the bottle (10), comprising: - a liquid passage opening at one end (C2.1) into the inside of the bottle (10), - a separate air passage extending from the bottle (10) to the bottle (30) and connecting the inside of the bottle (10) to the bottom of the bottle (30) for the upward flow of air towards the latter, while liquid is transferred from the bottle (30) to the bottle (10) via the liquid passage, - a restriction device (C2.2, 26b) for the air passage disposed inside the bottle (10) above the end (C2.1) so as to stop, or at least slow down, the upward flow of liquid into the bottle (10), and therefore the flow of liquid, when the liquid level in the bottle (10) reaches the restriction device. Figure for the abbreviation: Fig. 6.

Description

Title of the invention: SYSTEM AND METHOD FOR REFILLING A BOTTLE WITH VISCOUS LIQUID Technical field

[0001] The present invention relates to the field of liquid refilling, or refilling, a bottle to be refilled from a source bottle called a refill. The present invention relates more particularly to a system for refilling a bottle to be refilled from a refill with liquid and also to a method for refilling a bottle to be refilled from a refill with liquid. Prior art

[0002] Different systems and methods exist for transferring liquid from one bottle to another in order to refill the latter.

[0003] However, when the liquid to be transferred is viscous, typically an oil, a shower gel, etc., the transfer is more difficult to carry out and sometimes requires the use of relatively complex systems.

[0004] There is therefore a need to have a system and a method for simply and efficiently transferring a viscous liquid from a source bottle to a bottle to be refilled. Statement of the invention

[0005] The invention thus relates to a system for refilling a bottle to be refilled with liquid from a source bottle containing a viscous liquid, the bottle to be refilled having an opening arranged above the bottom and the source bottle having an opening and a bottom opposite the opening, the source bottle containing viscous liquid being turned over so that its opening is arranged above the opening of the bottle to be refilled, the system comprising:

[0006] -a liquid passage which extends between the source bottle and the bottle to be refilled, opening out through an opening end inside the bottle to be refilled and which is capable of putting the source bottle and the inside of the bottle to be refilled into communication so as to allow the transfer of liquid from the source bottle to the bottle to be refilled through the liquid passage,

[0007] -an air passage, distinct from the liquid passage, which extends from the bottle to be refilled to the source bottle and which is capable of putting the interior of the bottle to be refilled and the bottom of the source bottle into communication so as to allow air to rise from the bottle to be refilled to the bottom of the source bottle, while liquid is transferred from the source bottle to the bottle to be refilled,

[0008] -a device for restricting a passage section of the air passage which is arranged inside the bottle to be refilled above the opening end of the liquid passage so as to stop, or at least slow down, the rise of liquid in the bottle to be refilled, and therefore the flow of liquid in said bottle to be refilled, when the level of liquid in the bottle to be refilled reaches the restriction device, the restriction device being adapted to the viscosity of the liquid.

[0009] The aforementioned system makes it possible to simply and efficiently transfer a viscous liquid from the source bottle to the bottle to be refilled located below. The gestures for implementing such a system are particularly simple for the user. Furthermore, the design of the system is such that the flow of liquid from the source bottle to the bottle to be refilled is stopped or, at least, slowed down, automatically without the user having to intervene.To do this, the passage section of the air passage is locally reduced (by construction) in the part of the system which is located above the opening end of the liquid passage, inside the bottle to be refilled so that, when the flow of the liquid inside the bottle to be refilled causes the liquid level in the latter to rise until it reaches the reduced passage section, the liquid cannot, or in any case with great difficulty, continue to rise in the bottle to be refilled by crossing this reduced passage section, due to its viscosity and the dimensions of the reduced passage section which are adapted to this viscosity. This configuration of the system (zone with passage restriction) makes it possible to control the refilling level in the bottle to be refilled.In certain embodiments, depending on the viscosity of the liquid and the available passage sections, the flow of liquid from the source bottle to the bottle to be refilled can be done by simple gravity or by creating pressure inside the source bottle, for example by manually deforming, by compression, the deformable external walls of the source bottle. It will be noted that this system applies more particularly to liquids whose viscosity is at least 20 to 25 Centipoises. Furthermore, the internal passage section of the liquid passage also depends on the viscosity of the liquid and will be all the greater the more viscous the liquid is. It will be noted that refilling the bottle to be refilled can take several seconds, or even several tens of seconds, without however exceeding several minutes and in particular without exceeding 5 minutes.For example, the internal passage section of the liquid passage for an oil may be smaller than that for a shower gel. Depending on the system configurations, the liquid and air passages may each be made of at least two portions which are either separate in a blocking or closing position or joined in a position allowing the passage of fluid in these passages (the liquid flowing out and the air rising). According to an alternative configuration, the liquid and air passages may already be integrally formed and, for example, be mounted on one of the two bottles (e.g. the source bottle above) and the only setting. in place of the source bottle in the inverted position with the liquid passage introduced into the opening of the bottle to be refilled allows the liquid to be transferred. Furthermore, depending on the configurations, the system can be designed so that, in the installed position, the assembly formed by the source bottle and the bottle to be refilled is mechanically secured thanks to internal fixing means between certain elements of the system.

[0010] According to other possible characteristics:

[0011] -the liquid passage comprises a liquid conduit provided with the opening end of the liquid passage and which extends axially at least partly inside the bottle to be refilled, in a manner axially centered relative to the latter;

[0012] -the system comprises a part surrounding the liquid conduit coaxially and providing with the liquid conduit one or more radial spaces defining the reduced passage section of the air passage;

[0013] -the part surrounding an outer surface of the liquid conduit comprises a terminal end which is configured to engage radially in a radially hollowed annular portion of the outer surface of the liquid conduit;

[0014] -the part surrounding the liquid conduit is mounted on the bottle to be refilled;

[0015] -the system comprises a liquid transfer device mounted on the source bottle and which includes the liquid conduit;

[0016] -the part surrounding the liquid conduit is mounted on the liquid transfer device;

[0017] -the liquid transfer device also comprises an air duct which is part of the air passage and which extends inside the source bottle towards the bottom of the latter;

[0018] -the liquid transfer device comprises two rings mounted to rotate relative to each other, namely a ring comprising, on the one hand, the liquid conduit which forms a first portion of the liquid passage and, on the other hand, a first portion of the air passage and, a ring comprising, on the one hand, a second portion of the liquid passage and, on the other hand, a second portion of the air passage;

[0019] -the two rings are capable of occupying, on the one hand, a blocking position in which the two portions of the liquid passage and the two portions of the air passage of the two respective rings are not in fluid communication with each other and, on the other hand, a transfer position in which the two portions of the liquid passage and the two portions of the air passage of the two respective rings are in fluid communication with each other so as to allow the transfer of liquid from the source bottle to the bottle to be refilled through the two portions of the liquid passage which are in fluid communication with each other, and to transfer the air contained in the bottle to be recharged to the source bottle through the air passage section restriction device and the two portions of the air passage in fluid communication with each other;

[0020] -the system comprises a seal forming a fluid communication interface between the two rings.

[0021] The invention also relates to a method for refilling a bottle to be refilled with liquid from a source bottle containing a viscous liquid in a system comprising, on the one hand, a bottle to be refilled having an opening arranged above the bottom and, on the other hand, a source bottle containing viscous liquid and having an opening and a bottom opposite the opening, the source bottle being turned over so that its opening is arranged above the opening of the bottle to be refilled, the method comprising the following steps:

[0022] -flow of liquid from the source bottle to the bottle to be refilled via a liquid passage which opens through an opening end inside the bottle to be refilled in which the liquid rises,

[0023] -air rising from inside the bottle to be refilled towards the bottom of the source bottle via an air passage, separate from the liquid passage, while the liquid level rises in the bottle to be refilled,

[0024] -stopping or braking the rise of liquid in the bottle to be refilled, and therefore the flow of liquid in the bottle to be refilled, when the level of liquid in the bottle to be refilled reaches a reduced passage section of the air passage which is arranged inside the bottle to be refilled above the opening end of the liquid passage, the reduced passage section of the air passage being adapted to the viscosity of the liquid.

[0025] The above method has the same advantages as those mentioned above in relation to the system and they will therefore not be repeated.

[0026] According to other possible characteristics:

[0027] -the liquid passage comprises a liquid conduit which is provided with the opening end of the liquid passage and which extends axially at least partly inside the bottle to be refilled;

[0028] - prior to the steps of liquid flow, air rise and stopping or braking the rise of liquid, the method comprises a preliminary step during which the opening end of the liquid conduit which is fixed to the source bottle is introduced inside the bottle to be refilled;

[0029] -the system comprises two rings mounted to rotate relative to each other, namely a ring comprising, on the one hand, the liquid conduit which forms a first portion of the liquid passage and, on the other hand, a first portion of the air passage and, another ring comprising, on the one hand, a second portion of the liquid passage and, on the other hand, a second portion of the air passage;

[0030] -one ring is fixed to the source bottle and the other ring is fixed to the bottle to be refilled with the opening end of the liquid conduit inserted inside the bottle to be refilled; when only one ring is fixed to the source bottle by a first part, the second part comprising the liquid conduit can be positioned on the bottle to be refilled with the opening end of the liquid conduit inserted inside the bottle to be refilled;

[0031] -when the ring is screwed onto the bottle to be refilled, the method comprises a step during which a relative rotational movement between the two bottles, and therefore between the two rings, is carried out in order to put the two portions of the liquid passage and the two portions of the air passage of the two respective rings into fluid communication with each other and, thus, to allow the flow of liquid from the source bottle to the bottle to be refilled through the two portions of the liquid passage in fluid communication and the rise of the air contained in the bottle to be refilled through the reduced passage section of the air passage and the two portions of the air passage in fluid communication;

[0032] -the system comprises a part surrounding the liquid conduit coaxially and providing with the liquid conduit one or more radial spaces defining the reduced passage section of the air passage;

[0033] -when removing the liquid conduit from the bottle to be refilled, the part surrounding the liquid conduit scrapes the outer surface of the liquid conduit up to its open end. A relative movement is thus carried out between, on the one hand, the part surrounding the liquid conduit, in particular an open end of this part and, on the other hand, the outer surface of the liquid conduit. It will be noted that during this phase of removing the liquid conduit from the bottle to be refilled, the part can remain mounted on the bottle to be refilled.However, when the opening end of the part surrounding the liquid conduit reaches the opening end of the liquid conduit, either the liquid conduit continues its extraction, alone, from the bottle and the opening end of the part surrounding the liquid conduit slides over the opening end of the liquid conduit, or the liquid conduit is shaped, in particular by its free opening end, to carry with it, during its withdrawal, the part, for example by hooking its opening end in passing. Brief description of the drawings

[0034] Other characteristics and advantages will appear during the description which follows, given solely by way of non-limiting example and made with reference to the appended drawings, in which:

[0035] [Fig-1] [Fig.l] is a schematic axial sectional view of part of a system liquid refilling comprising a refillable bottle according to one embodiment of the invention;

[0036] [Fig.2] [Fig.2] is a schematic axial sectional view of a portion of a liquid refilling system comprising a source bottle provided with a liquid transfer device according to one embodiment of the invention;

[0037] [Fig.3] [Fig.3] is a schematic axial sectional view of a complete liquid refilling system comprising the refill bottle of [Fig.1] and the source bottle of [Fig.2] in an inverted position, being mounted on the refill bottle;

[0038] [Fig.4] [Fig.4] is a schematic axial sectional view of the complete system of [Fig.3] mounted on the bottle to be refilled;

[0039] [Fig.5] [Fig.5] is a schematic axial sectional view of the system of [Fig.4] after rotation of one of the rings of the liquid transfer device and start of filling of the bottle to be refilled;

[0040] [Fig.6] [Fig.6] is a schematic view of the system of [Fig.5] showing the stopping or braking of the filling of the bottle to be refilled;

[0041] [Fig.7] [Fig.7] is a schematic axial sectional view of the system of [Fig.6] during removal of the ring of the liquid transfer device which was engaged inside the bottle to be refilled;

[0042] [Fig.8A] [Fig.8A] is a schematic cross-sectional view of a form of possible production of a device for restricting a section of the air passage;

[0043] [Fig.8B] [Fig.8B] is a schematic cross-sectional view of another possible embodiment of a device for restricting a passage section of the air passage;

[0044] [Fig.8C] [Fig.8C] is a schematic cross-sectional view of another possible embodiment of a device for restricting a passage section of the air passage;

[0045] [Fig.8D] [Fig.8D] is a schematic cross-sectional view of another possible embodiment of a device for restricting a passage section of the air passage;

[0046] [Fig.9] [Fig.9] is a schematic axial sectional view of a liquid refilling system according to a first embodiment variant;

[0047] [Fig. 10] [Fig. 10] is a schematic axial sectional view of a liquid refilling system according to a second embodiment variant;

[0048] [Fig. 1 IA] [Fig. 1 IA] is a schematic axial sectional view of a liquid refilling system according to a third embodiment variant when placed on a bottle to be refilled;

[0049] [Fig. 1 IB] [Fig. 1 IB] is a schematic axial sectional view of the system of [Fig. 10] after refilling the bottle to be refilled;

[0050] [Fig.l2A] [Fig.l2A] is a schematic axial sectional view of a liquid refilling system according to a fourth variant embodiment during a first phase of the withdrawal of the liquid conduit from the liquid transfer device which was engaged inside the bottle to be refilled;

[0051] [Fig.l2B] [Fig.l2B] is a schematic axial sectional view of the system of [Fig.l2A] during a second phase of the withdrawal of the liquid conduit. Description of the embodiments

[0052] The invention which is described below with reference to the appended drawings relates in particular to a system for refilling a bottle or container to be refilled with liquid from a source bottle or container and an associated method. Generally, the bottle to be refilled or refilled has already been used to dispense liquid such as a fragrance or another liquid which has been consumed and the bottle must therefore be refilled to the extent that it is empty or almost empty. The liquid which is to be transferred from the source bottle to the bottle to be refilled is viscous, that is to say it is for example an oil, a gel, a serum, etc. On the other hand, water and alcohol in particular are not part of the liquids which it is possible to transfer within the scope of the present invention.The viscous liquids that the system according to the invention envisages transferring from a source bottle to a bottle to be refilled are liquids which typically have a minimum viscosity of the order of 20 to 25 centipoise.

[0053] [Fig.l] represents a bottle or container to be refilled 10 which has, at its lower end, a base 12 and, at its opposite upper end, an opening 14.

[0054] Conventionally, such a bottle is generally equipped, in a known manner, with a pump 16 connected, at its upper end, to a liquid dispensing device or diffuser 18 and, at its opposite lower end, to a dip tube 20 intended to be immersed in the liquid contained in the bottle. A ring 22 provided with an internal thread is mounted on a shoulder of the body of the pump 16 and is intended to be screwed onto a complementary external thread of the neck 24 of the bottle.

[0055] In the example shown in [Fig.l], the assembly formed by the pump 16, the diffuser 18 and the dip tube 20 is removed from the bottle 10 in order to leave installed in the opening 14 a hollow part 26 which is axially centered (along the vertical axis Z) in the opening. The part 26 is removably fixed by an end 26a mounted on the internal rim 24a of the neck 24 which delimits the opening 14, in particular by forcibly engaging the end 26a on the annular rim 24a. The part 26 extends to an opposite end 26b, called the terminal end, following a shape generally convergent. The part has at its first end 26a a first diameter defining a first opening (this first diameter cooperates with the peripheral rim 24a) and extends continuously to its terminal end 26b, where it has a second diameter reduced compared to the first diameter and which defines a second opening smaller than the first opening. The part 26 has for example a general shape of revolution around the Z axis and takes for example the general shape of a skirt.The part 26 is thus tightened around the axis Z at its terminal end 26b and has a certain radial elasticity (the part 26 is made of a flexible plastic material) allowing this terminal end to be moved radially when it encounters another part and in particular, as will be seen later, during the introduction of a liquid conduit inside the bottle to be refilled 10 and inside the part 26. According to a variant not shown, the part 26 can be mounted in the opening 14 of the bottle to be refilled 10 after removal of the assembly comprising the pump 16.

[0056] Alternatively, the refillable bottle 10 may not include the assembly formed in particular by the pump 16 and, thus, only be provided with a cap 28 screwed onto the neck 24 of the bottle. As shown on the right-hand part of [Fig.l], the cap 28 includes, in its radially internal part relative to the external skirt 28a which includes an internal thread 28b, a cylindrical wall or collar 28c. This wall 28c forms with the skirt 28a an annular space in which the threaded neck 24 of the bottle and the skirt 26 of the refillable bottle 10 are housed, when the cap 28 is screwed onto the latter and thus closes the opening 14. It will be noted that the refillable bottle can be made of different rigid (e.g. glass) or flexible materials.

[0057] [Fig. 2] represents a source bottle or container 30, rigid or flexible, which contains a viscous liquid in the sense defined above and at least a part of which will be transferred to the bottle to be refilled 10 of [Fig. 1].

[0058] The source bottle 30 comprises a bottom 32 and an opening 34 opposite the bottom which is arranged, in [Fig. 2], above the bottom but which will be arranged below when the bottle 30 is turned over as in [Fig. 3]. The bottle 30 is here equipped with a liquid transfer device 40 which is fixed to the bottle, for example by screwing (although other methods of fixing can be envisaged) onto the threaded neck 36 of the bottle, and which comprises two parts mounted to rotate relative to each other and each forming a ring.

[0059] The liquid transfer device 40 thus comprises a first ring 42 which is directly fixed, for example by screwing onto the neck 36. The first ring 42 comprises a double concentric ring structure comprising a first internal structure which comprises a central body 44 arranged in line with the opening 34. The central body 44 comprises, on the one hand, a first portion 46 which extends sen ably transversely relative to the vertical axis Z passing through the axial opening 34 of the bottle and over the entire width or diameter of this opening and, on the other hand, a second portion 48 which extends substantially axially from the external periphery of the first portion 46, downwards in [Fig.2], and is supported by an internal rim located at its distal end 48a on a peripheral seal J1 disposed between the internal rim and the upper edge 36a of the threaded neck 36. The central body 44 is disposed outside the bottle 30 and seals the opening 34 of the latter. A skirt 50 offset radially externally relative to the distal end 48a of the second portion 48 extends axially downwards opposite the threaded neck 36. The skirt 50 is provided, on its internal surface which is opposite the threaded neck 36, with an internal thread 50a allowing it to be screwed onto the neck.

[0060] The double concentric ring structure of the first ring 42 also comprises a second external structure which forms an external ring 52 concentrically surrounding the first internal structure (44, 46, 48) described above. When the user manipulates the system, the latter can use this second external ring structure 52 as a support for his fingers to indirectly grasp the bottle 30.

[0061] It will be noted that the first portion 46 of transverse extension of the central body 44 has, for example, the appearance of a plate or a disc which is pierced in its thickness with two through orifices 01 and 02 arranged in a diametrically opposite manner relative to the central axis of the opening 34. The first opening 01 opens, on the internal side of the first ring 42, into a space communicating directly with the interior of the source bottle (arranged under the opening 01 in [Fig. 2]). As regards the second opening 02, the central body 44 has, in its internal part oriented towards the interior of the bottle 30, and offset radially relative to the central axis of the opening 34, a portion thickened relative to the thickness of the first portion 46 in which the first opening 01 is made.This thickened portion is pierced along its entire thickness so as to define an axial chimney 44a opening at one end (upper in [Fig.2]) onto the second opening 02. A conduit Cl is force-fitted into this chimney 44a, by the opposite end (lower in [Fig.2]) of the latter, and extends axially downwards towards the bottom 32 of the bottle. The conduit Cl thus opens, at its lower end ([Fig.2]) which is opposite the upper end opening onto the second opening 02, close to the bottom 32.

[0062] The liquid transfer device 40 also comprises a second ring 60 which is mounted axially on the first ring 42, i.e. in the axial extension of the latter, and is fixed to this first ring by fitting an axial engagement part 62 inside the first ring 42. More particularly, in [Fig.2], the axial engagement part 62 takes the form of a substantially cylindrical wall provided on its external surface with snap-fastening member(s) (e.g. radial fingers) which cooperate(s) with one or more complementary retaining members (e.g. radial peripheral collar) arranged on the internal face of the external structure forming the external ring 52, when the second ring 60 is engaged axially inside the first ring 42.

[0063] The second ring 60 also comprises, on the side opposite the side where the axial engagement portion 62 is arranged, a body 64 which extends axially in a direction opposite to the direction of extension of the axial engagement portion 62. This body 64 has a radial extension (or size) less than that of the axial engagement portion 62 insofar as the body 64 is intended to cooperate with the neck 24 of the bottle to be refilled 10 (the neck 24 generally has a diameter less than the diameter of the neck 36 of the source bottle which has a larger capacity), in particular by a portion which is fixed, for example by screwing onto the neck 24, and by a radially internal portion which is engaged inside the neck 24. The body 64 thus comprises a central portion 66, arranged substantially in line with the first ring 42 and which extends along an axial height away from the first ring 42.The central portion 66 comprises, axially centered around the axis Z, a central liquid conduit C2 which extends away from the body 64 (here towards the top of [Fig.2]) to an emerging end C2.1. The conduit C2 also comprises a locally hollowed-out annular portion C2.2 on its outer surface (reduced outer surface section or reduced outer diameter). This hollowed-out portion is positioned at a distance from the emerging end C2.1 and its opposite end. The central portion 66 may also comprise, in a position radially external to the conduit C2, a cylindrical wall or collar 66a and, in a position radially external to the collar 66a, an axial skirt 66b comprising an internal thread 66b 1.The assembly formed by the conduit C2 and the collar 66a is intended to engage inside the opening 14 of the bottle to be refilled 10, while the axial skirt 66b is intended to cooperate externally with the threaded neck 24 and to surround the neck. The second ring 60 here comprises a shoulder 68 which extends substantially transversely from the external periphery of the body 64 and the axial engagement portion 62 integral with this shoulder extends axially perpendicular to the latter. An annular rim or collar 70, also integral with the shoulder 68, extends axially perpendicular to the latter, in a radially internal position relative to the axial engagement portion 62 and has an internal diameter adapted to engage around the first portion 46 of transverse extension of the central body 44.More particularly, a fixed seal J2 is positioned between the first portion 46 of the first ring 42 (in particular the face of the first portion . 46 from which extends the chimney 44a) and the body 64 of the second ring 60 (in particular the face of the body 64 which is opposite the face from which extend the skirt 66b and the collar 66a). This seal J2 is pierced in its thickness with two openings 01' and 02' which are in geometric correspondence with the openings 01 and 02. This seal J2 thus forms a fluid communication interface between the two rings assembled with each other. The collar 70 arranged around the internal structure 44 of the first ring thus ensures positioning and radial wedging of the sealing seal J2.

[0064] Furthermore, the body 64 is not solid, as the axial section of [Fig. 2] might suggest. Indeed, this body 64 is structured internally so as to provide, on the one hand, a portion for the passage of liquid and, on the other hand, a portion for the passage of air, as will be seen later in the context of the operation of the liquid refill system.

[0065] [Fig. 2] also illustrates the fact that the visible part of the second ring 60, which here is an upper part, can be protected by a cover or lid 72 (optional) which covers it while waiting to be used to transfer liquid from this source bottle. As shown in [Fig. 2], this cover 72 can for example have internal conformations allowing, on the one hand, the cover to be wedged in position by its bottom on the conduit C2 and, on the other hand, to be hooked radially on the external skirt 66b of the second ring.

[0066] [Fig. 3] illustrates a next step in the installation of the system on the bottle to be refilled 10 of [Fig. 1] and the source bottle 30 (from which the possible cover 72 of [Fig. 2] has been removed) is turned over so that its bottom 32 is arranged above its opening 34. The source bottle 30 is positioned so that the opening 34 is positioned above the bottle to be refilled 10. In the position of [Fig. 3], the upper end of the conduit C1 which is located near the bottom 32 is arranged in an area of ​​the bottle containing air and not liquid, the liquid initially present in this area having descended towards the liquid transfer device 40 when the bottle has been turned over. It will be noted that during this operation the user can grasp the source bottle 30 in particular by means of the external ring structure 52 of the first ring 42.

[0067] More particularly, the liquid transfer device 40 which is mounted on the source bottle 30 is positioned above the bottle to be refilled 10 (this device 40 is also turned over and the orientations up and down, upper and lower ... mentioned above during the description of [Fig. 2] are to be reversed in [Fig. 3]). The second ring 60 is arranged above the opening 14 of the bottle to be refilled 10 and is lowered vertically so that the liquid conduit C2 penetrates axially (progressively) through the opening 14 of the bottle to be refilled and inside the latter by crossing the hollow part or skirt 26 (funnel-shaped part).

[0068] By continuing the downward movement ([Fig. 4]) inside the hollow part 26 which is tightened at its terminal end 26b, the central part 66 of the body 64 comes into axial abutment against the neck 24 of the bottle to be refilled 10. More particularly, this abutment is the result of the complete screwing of the external skirt 66b onto the threaded neck 24. It will be noted that the introduction of the collar 66a inside the opening 14 of the bottle and of the part 26 thus makes it possible to pinch this part between the collar and the skirt in the position illustrated in [Fig. 4]. In this position, the terminal end 26b is located in an axial position corresponding to the axial position of the locally hollowed-out annular portion C2.2 of the conduit C2. As shown in [Fig.4], the terminal end 26b is spaced from the outer surface of reduced diameter of the conduit C2 by a small radial distance which here extends all around the conduit (in the manner of an annular space El which is arranged between the terminal end 26b of the part 26 and the locally hollowed out annular portion C2.2). This gap thus defines a reduced fluid passage section whose dimensions are adjusted according to the viscosity of the liquid which will be transferred into the bottle to be refilled. It will be noted that other embodiments are conceivable for providing one or more radial spaces, here referenced El, of reduced passage section(s) between the end 26b and the outer surface of the conduit C2. The two elements 26b and C2.2 jointly form, locally, a device for restricting a passage section on the path of the air passage between the two bottles.

[0069] Thus, the more viscous the liquid, the greater the radial gap between the terminal end 26b and the restriction C2.2 can be. It should be noted that it is not the total passage section between the part 26 and the conduit C2 which counts (for example the entire annular passage section) but the gap or radial distance between the end 26b and the facing outer surface C2.2 of the conduit C2 and which defines the radial passage restriction. This gap or distance can be of the order of l / 10th or a few l / 10th mm. Thus, for an edible oil, the radial distance between the two elements is for example 0.1 mm, or even less than this value, and for a shampoo, the radial distance between the two elements is for example of the order of 0.5 to 0.8 mm. Generally speaking, the restriction of the air passage section is adapted to the viscosity of the liquid.

[0070] Similarly, the internal passage section of the conduit C2 is all the greater as the liquid is viscous. For example, for a food oil, the internal section may be of the order of 20 mm2 (i.e. an internal flow diameter of 5 mm for example), while for a shampoo which is more viscous, the section may be around 150 mm2 (i.e. an internal flow diameter of 14 / 15 mm for example).

[0071] In the position of [Fig.4] the liquid transfer device 40 is fixed to the bottle to be refilled (by screwing) by means of its second ring 60. Other fixing means can alternatively be envisaged, or no means at all, as will be seen later. In this position, no flow of the liquid contained in the inverted bottle 30 can take place because the liquid transfer device 40 is in a closed or blocked position.

[0072] The user then rotates one of the two bottles 10 and 30 relative to the other in order to rotate that of the two rings 42 and 60 which is fixed to the bottle which must rotate relative to the other ring. In this example, it is the bottle to be refilled 10 which rotates around the vertical axis Z (under the action of the user's fingers), thus rotating the second ring 60 relative to the first ring 42 which remains fixed as well as to the seal J2 which also remains static. In particular, during this movement, the axial engagement part 62 which is axially blocked relative to the outer ring structure 52 rotates inside the latter, as does the whole of the second ring 60 to which the part 62 is integral and in particular the body 64.

[0073] Thus, after rotation, the liquid transfer device 40 is in the position of [Fig. 5] where it can be seen that the body 64 of the second ring 60 comprises a liquid passage portion 65 which has the shape of an angled channel. This channel is now positioned so as to put the conduit C2 centered on the central axis of the opening 14 of the bottle 10 into fluid communication with an opening 65a offset laterally or radially relative to the conduit C2 and which is in fluid communication with the opening 01' of the seal J2 and the opening 01 in correspondence with the first ring 42. The channel 65 and the conduit C2 form together with the opening 01' of the seal J2, the opening 01 defined in the first portion 46 of the first ring a liquid passage which extends between the source bottle 30 and the bottle to be refilled 10.

[0074] Similarly, after rotation ([Fig.5]), it can be seen that the body 64 of the second ring 60 comprises an air passage portion 67, for example in the form of a channel, which is positioned so as to put the interior of the bottle to be refilled 10 (in its part or space E2 which is jointly delimited by the part 26 and the conduit C2) into fluid communication with an opening 67a offset laterally or radially and which is in fluid communication with the opening 02' of the seal J2 and the opening 02 in correspondence with the first ring 42, and therefore with the air conduit CL. The opening 67a is offset laterally with respect to the conduit C2 and the channel 67 arranged laterally with respect to the channel 65.The annular space E2 between the part 26 and the conduit C2, the air passage portion 67, the opening 02' of the seal J2, the opening 02 of the first ring 42 and the conduit C1 jointly form an air passage, distinct from the liquid passage, which extends from the bottle to be refilled 10 to the source bottle 30.

[0075] In accordance with the above, the first ring 42 thus comprises, on the one hand, a first portion of the liquid passage formed by the opening 01 defined in the first portion 46 of the first ring 42 and, on the other hand, a first portion of the air passage (duct C1, opening 02' of the seal J2, and opening 02 of the first ring 42) and, the second ring 60 comprises, on the one hand, a second portion C2 of the liquid passage (channel 65 and duct C2) and, on the other hand, a second portion 67 of the air passage. It will be noted that the annular space E2 delimited between the part 26 and the duct C2, including the air passage section restriction device described above (26b and C2.2) defines a portion of the air passage which is in permanent fluid communication with the second portion 67 of the air passage.

[0076] It will be noted, however, that the two rings may have other configurations in which the liquid passage portion (resp. the air passage portion) of each ring may have a different shape. For example, the liquid passage portion of the first ring may be enlarged (instead of being reduced to the opening 01 in the portion 46) and more closely resemble a channel.

[0077] In the blocking or closing position of [Fig. 4], the two portions of the liquid passage and the two portions of the air passage of the two respective rings 42, 60 are not in fluid communication with each other.

[0078] In the transfer or opening position of [Fig. 5], the two portions of the liquid passage and the two portions of the air passage of the two respective rings 42, 60 are in fluid communication with each other so as to allow the transfer of liquid from the source bottle 30 to the bottle to be refilled 10 through the two portions of the liquid passage (01, 01', 65 and C2) which are in fluid communication with each other, and to transfer or expel the air contained in the bottle to be refilled 10 which rises in the source bottle 30 (in the area where the upper end of the conduit C1 opens, near the bottom 32) through the air passage section restriction device described above (26b and C2.2), the downstream annular space E2 between the part 26 and the conduit C2 and through the two portions of the air passage (67, 02', 02 and Cl) in fluid communication with each other.

[0079] More particularly, when the transfer device 40 of the liquid refill system is in the transfer position of [Fig. 5], the liquid contained in the source bottle above flows, here for example by simple gravity, through the liquid passage defined above (01, 01', 65 and C2) and exits through the opening end C2.1, in particular in the form of drops or a trickle (due to the viscosity of the product) to begin to fill the bottle.

[0080] [Fig.6] illustrates the filling state of the bottle 10 when the transferred liquid L reaches the level (axial position along Z) where the terminal end 26b of the part 26 forms with the radially reduced local section C2.2 (groove) a passage section restriction device which thus defines a restricted passage zone for the air. Under these conditions, due to the small dimensions of this restricted passage zone (for example of the order of 1 / 10 mm of difference between the terminal end 26b and the facing groove C2.2), the passage section offered to the liquid is too small for the liquid to be able to freely pass through this zone given its viscosity and continue to rise in the bottle. As a result, the air contained between the bottle 10 and the part 26 can no longer escape through this zone. Thus, the rise of the liquid in the bottle 10 is automatically stopped (and therefore the flow of the liquid from the source bottle), or at least slowed down at this zone (filling control) and this, without the user needing to intervene. Generally, this position can be reached after several seconds or tens of seconds.In addition, at least one of the two bottles may be transparent, which allows the user to realize that the refilling is complete, either when the liquid level no longer rises or almost no longer rises in the transparent refill bottle, or when the liquid level no longer falls in the transparent source bottle.

[0081] After reaching the position of [Fig. 6], the user closes the liquid transfer device by proceeding in reverse of the step described above from [Fig. 4] and thus rotates the second ring 60 in the opposite direction in order to move from the position of [Fig. 6] to the position of [Fig. 4]. When the liquid passage and air passage portions of the two respective rings are no longer in fluid communication with each other, the user can then decide to remove the second ring 60 from the bottle to be refilled 10 of the liquid transfer device 40 by lifting it vertically as shown in [Fig. 7].

[0082] During this step, the liquid conduit C2 slides axially against the terminal end 26b of the skirt 26, elastically deforming this end radially outwards, which thus scrapes the outer surface of the conduit up to its emerging end C2.1. This action thus makes it possible to clean the outer surface of the conduit C2 by ridding it of drops of liquid which are likely to have accumulated there, the scraped drops thus falling into the bottle. It will be noted that this action is made possible, on the one hand, by the fact that the part 26 is fixed to the bottle 10 and, on the other hand, by the fact that the diameter of the part 26 at its terminal end 26b is less (in the undeformed elastic state), than the outer diameter of the outer surface of the conduit C2.

[0083] Figures 8A-8D illustrate, in cross-sectional views relative to the axis Z passing through the opening of the bottle to be refilled, several possible embodiments of the air passage restriction zone arranged between the part 26 and the liquid conduit C2 and therefore of a device for restricting a passage section of the air passage which defines this zone.

[0084] [Fig.8A] represents the embodiment described above in relation to the previous figures and according to which an annular groove C2.2 is made in the outer surface of the duct C2 and thus forms, with the inner surface opposite the emerging end 26b, a peripheral radial space El (ring or crown) which defines the reduced passage section of the air passage.

[0085] [Fig.8B] illustrates another possible embodiment in which two recesses or indentations C2.21' and C2.22', here diametrically opposed, are made in the outer surface of the duct C2' and thus each form, with the inner surface opposite the emerging end 26b, a local radial space which locally defines a reduced passage section of the air passage.

[0086] [Fig.8C] illustrates another possible embodiment in which three recesses or indentations C2.21”, C2.22” and C2.23”, here distributed at an angular distance of 120° from each other, are made in the outer surface of the duct C2' ' and thus each form, with the inner surface opposite the emerging end 26b, a local radial space which locally defines a reduced passage section of the air passage.

[0087] It will be noted that a different number of radial spaces can thus be arranged on the outer surface of the liquid conduit, with a different arrangement and shape.

[0088] Alternatively, as illustrated in [Fig.8D], the outer surface of the duct C2 is not modified locally but the part 26.1 may adopt a configuration, for example locally thinned radially at its terminal end in order to define a reduced passage section for the air. Here, three recesses or indentations 26.11, 26.12 and 26.13, for example distributed at an angular distance of 120° from each other, are made in the inner surface of the terminal end 26.1b of the part 26.1 and thus each form, with the facing outer surface of the duct C2, a local radial space which locally defines a reduced passage section of the air passage. A different number of recesses, with a different arrangement, may also be envisaged, or even one or more other local conformations of the part surrounding the duct C2.

[0089] [Fig.9] illustrates an alternative embodiment in which the part 26' (this part, for example in the form of a skirt, coaxially surrounds the liquid conduit C2 and provides with the liquid conduit C2 one or more radial spaces defining the reduced passage section of the air passage) is no longer carried by the bottle to be refilled 10', but by the source bottle 30. This alternative is used when it is not necessary to clean the external surface and in particular the opening end C2.1 of the conduit after transfer of liquid and filling of the bottle to be refilled. This can be useful when the liquid does not stick to the surfaces. The bottle to be refilled thus has one less part and forms a bottle of the conventional type.

[0090] In the example of [Fig.9] the part is mounted around the collar 66a, between the latter and the axial skirt 66b. In this way, when mounting the liquid transfer device on the neck 24 of the bottle to be refilled 10', and in particular when screwing the second ring 60' onto this neck, the part 26' is always inserted between the inner surface of the neck 24 and the collar 66a;

[0091] However, when removing the liquid transfer device, as shown in [Fig.9], the part 26' is also removed since it is connected to the second ring 60'. The other elements described with reference to the previous figures are also part of this variant and are not repeated.

[0092] [Fig. 10] illustrates another alternative embodiment which differs from the previous embodiment and variants in that the second ring 60'' of the liquid transfer device is no longer mounted on the neck 24 of the bottle to be refilled but is simply inserted inside the neck by the collar 66a which still bears against the part 26. The skirt 66b of the previous figures is removed and an external skirt 66b” extends coaxially to the collar and to the neck 24, substantially in alignment with the external ring structure 52 of the first ring 42. To do this, the second ring 60'' is slightly modified by radially widening the body 64'' thereof, so that the skirt 66b” extends axially from the external periphery thereof.As shown in the figure, the user's fingers are applied to the outer skirt 66b” to manipulate the second ring 60” in rotation relative to the first ring 42 and, thus, open or close the liquid transfer device, as required. The other hand of the user can grasp the first ring screwed onto the bottle 30 during this rotational movement of the second ring in order to immobilize the bottle in rotation. The other elements described with reference to the previous figures are also part of this variant and are not repeated.

[0093] This variant is advantageous insofar as it is not screwed onto the neck of the bottle to be refilled and therefore does not require a second ring with a thread adapted to that of the neck of the bottle to be refilled. The transfer device according to this variant is thus more universal since it can interface with a wide variety of bottles to be refilled (with or without thread) without needing a specific mounting system.

[0094] Figures 11A-B illustrate another alternative embodiment which differs from the previous embodiment and variants in that the refill system comprises a liquid passage and a separate air passage which are both permanently in fluid communication with the bottle to be refilled as soon as the liquid transfer device D is partially introduced into the opening of the neck of the bottle to be refilled ([Fig.l 1 A]) and comes to rest against the latter ([Fig.l 1B]). The liquid transfer device D always occupies a single position allowing the transfer of liquid from the source bottle 30 to the bottle to be refilled and simultaneously an air passage reverse of the bottle to be refilled to the source bottle. The bottle to be refilled 10 is identical to that of figures 1 to 7. This variant is simpler to produce and easier to implement than the previous mode and variants.

[0095] In this variant, the liquid transfer device D takes for example the form of a ring B1 of which a first part forming a skirt B 1.1 is mounted by screwing onto the neck 36 of the source bottle, as with the skirt 50 of [Fig. 2], and of which a second part B1.2 axially extends the first part and extends transversely / radially to partially close the opening of the source bottle 30. The second part B 1.2 integrates in its transverse extension portion, on one side which is oriented towards the inside of the source bottle 30, the air duct C1, for example fitted into a chimney B 1.21, and on the opposite side which is oriented towards the outside of the source bottle, a liquid duct C2' similar to the duct C2. The second part B 1.2 thus integrates into the thickness of its transverse extension portion, an air passage portion PI communicating with the duct Cl and which opens into an annular space delimited by an external collar which extends axially away from the second part B 1.2 and coaxially surrounds the duct C2'. The same arrangement was provided in the mode of [Fig.5] with the collar 66a at the outlet of the air passage portion 67. The duct C2' has the same characteristics as the duct C2 with its localized external section reduction C2.2' and its emerging end C2.1'.

[0096] As shown in [Fig. 1 IB], the duct C2' is inserted into the opening 14 of the neck 24 so as to bear against the upper edge of the latter, with the collar B 1.22 bearing radially against the part 26 and the reduced air passage section thus formed between the end 26b of the part 26 and the external section restriction C2.2' of the duct. Thus, the same arrangement as that described above is achieved in this variant with the same advantages.

[0097] As in the embodiment and the variants described above, the stopping or braking of the rise of the liquid in the bottle to be refilled (and therefore the stopping or braking of the transfer of liquid) is obtained in an identical manner with the same advantages.

[0098] Figures 12A-B illustrate another variant embodiment which reproduces the mode of Figures 1 to 7 but which differs in two aspects: -on the one hand, the liquid conduit C2” has a free emerging end C2.1” which is shaped in the form of an external rim or shoulder, -and, on the other hand, the part 26 mounted on the inner rim 24a of the neck 24 of the bottle to be refilled 10 can be dismantled / removed axially from the latter when removing the second ring 60” from the liquid transfer device 40” (figs. 12A and 12B) following the engagement of the shaped free emerging end C2.1” against the emerging end 26b of the part 26, which has the effect of driving the part 26 upwards, disengaging it from the inner rim 24a of the neck 24.

[0099] As shown in [Fig. 12B], the part 26 is thus carried by the second ring 60”, and therefore removed from the bottle to be refilled, while being held in contact with the end of the conduit C2” of the latter. Thus, the bottle to be refilled which has just been refilled can be quickly reused by replacing inside it either the assembly fitted with the pump 16 of [Fig.l] or the cap 28 of this figure. The part 26 can for example be manually removed from the second ring 60”.

[0100] When removing the conduit C2' ' from the bottle to be refilled ([Fig. 12A]), it will be noted that the opening end 26b always provides a cleaning function by scraping the drops of liquid remaining on the external surface of the conduit, up to the end C2.1”.

[0101] Other means of mechanical cooperation between the second ring 60 and the part 26 may alternatively be envisaged to allow the part 26 to be removed with the second ring 60.

[0102] Everything that has been described previously in the context of the description of the embodiment of figures 1 to 7 applies to the different variants described after this embodiment, except in the event of technical incompatibility between the embodiments.

Claims

Claims

1. System for refilling a bottle to be refilled (10) with liquid from a source bottle (30) containing a viscous liquid, the bottle to be refilled having an opening (14) arranged above the bottom (12) and the source bottle (30) having an opening and a bottom (32) opposite the opening, the source bottle (30) containing viscous liquid being turned over so that its opening is arranged above the opening (14) of the bottle to be refilled (10), the system comprising: - a liquid passage (01, 01', 65, C2) which extends between the source bottle (30) and the bottle to be refilled (10) and opens out via an opening end (C2.1) inside the bottle to be refilled (10) and which is capable of putting the source bottle and the inside of the bottle to be refilled into communication so as to allow the transfer of liquid from the source bottle to the bottle to be refilled through the liquid passage, -an air passage (14, 67, 02', 02, Cl), separate from the liquid passage, which extends from the bottle to be refilled to the source bottle and which is capable of putting the inside of the bottle to be refilled and the bottom (32) of the source bottle into communication so as to allow the rise of air from the bottle to be refilled towards the bottom of the source bottle, while liquid is transferred from the source bottle to the bottle to be refilled, -a restriction device (26b, C2.2) of a passage section of the air passage which is arranged inside the bottle to be refilled (10) above the opening end (C2.1) of the liquid passage so as to stop, or at least to slow down, the rise of liquid in the bottle to be refilled (10), and therefore the flow of liquid in said bottle to be refilled, when the level of liquid in the bottle to be refilled reaches the restriction device (26b, C2.2), the restriction device being adapted to the viscosity of the liquid.

2. Liquid refill system for a bottle to be refilled according to claim 1, characterized in that the liquid passage comprises a liquid conduit (C2) provided with the opening end (C2.1) of the liquid passage and which extends axially at least partly inside the bottle to be refilled (10), in a manner axially centered relative to the latter.

3. Liquid refill system for a bottle to be refilled according to claim 2, characterized in that it comprises a part (26) surrounding the liquid conduit (C2) coaxially and providing with the liquid conduit one or more radial spaces (El; C2.21', C2.22'; C2.21”, C2.22”, C2.23”) defining the reduced passage section of the air passage.

4. Liquid refill system for a refillable bottle according to claim 3, characterized in that the part (26) surrounding an outer surface of the liquid conduit comprises a terminal end (26b) which is configured to engage radially in a radially hollowed annular portion (C2.2) of the outer surface of the liquid conduit (C2).

5. Liquid refill system for a refillable bottle according to claim 3 or 4, characterized in that the part (26) surrounding the liquid conduit is mounted on the refillable bottle (10).

6. Liquid refill system for a bottle to be refilled according to one of claims 2 to 5, characterized in that it comprises a liquid transfer device (40) mounted on the source bottle (30) and which comprises the liquid conduit (C2).

7. Liquid refill system for a refillable bottle according to claims 3 and 6, characterized in that the part (26') surrounding the liquid conduit (C2) is mounted on the liquid transfer device (40).

8. Liquid refill system for a refillable bottle according to claim 6 or 7, characterized in that the liquid transfer device (40) also comprises an air duct (Cl) which is part of the air passage and which extends inside the source bottle (30) towards the bottom (32) of the latter.

9. Liquid refill system for a bottle to be refilled according to one of claims 6 to 8, characterized in that the liquid transfer device (40) comprises two rings (42, 60) mounted to rotate relative to each other, namely a ring (60) comprising, on the one hand, the liquid conduit (C2) which forms a first portion of the liquid passage and, on the other hand, a first portion of the air passage and, another ring (42) comprising, on the one hand, a second portion of the liquid passage and, on the other hand, a second portion of the passage fl * Q1T*

10. CI 0.11 . Liquid refill system for a bottle to be refilled according to the preceding claim, characterized in that the two rings (42, 60) are capable of occupying, on the one hand, a blocking position in which the two portions of the liquid passage and the two portions of the air passage of the two respective rings are not in fluid communication with each other and, on the other hand, a transfer position in which the two portions of the liquid passage and the two portions of the air passage of the two respective rings are in fluid communication with each other so as to allow the transfer of liquid from the source bottle (30) to the bottle to be refilled (10) through the two portions of the liquid passage which are in fluid communication with each other, and to transfer the air contained in the bottle to be refilled (10) to the source bottle (30) through the air passage section restriction device (26b, C2.2) and the two portions of the air passage in fluid communication with each other.

11. Liquid refill system for a bottle to be refilled according to claim 9 or 10, characterized in that it comprises a seal (J2) forming a fluid communication interface between the two rings (42, 60).

12. Method for refilling a refillable bottle with liquid from a source bottle containing a viscous liquid in a system comprising, on the one hand, a refillable bottle (10) having an opening (14) arranged above the bottom (12) and, on the other hand, a source bottle (30) containing viscous liquid and having an opening and a bottom (32) opposite the opening, the source bottle (30) being turned over so that its opening is arranged above the opening (14) of the refillable bottle (10), the method comprising the following steps: -flowing liquid from the source bottle (30) to the refillable bottle (10) via a liquid passage (01, 01', 65, C2) which opens out via a through end (C2.1) inside the bottle to be refilled (10) in which the liquid rises, -air rise from inside the bottle to be refilled (10) towards the bottom (32) of the source bottle (30) via an air passage (14, 67, 02', 02, Cl), separate from the liquid passage, while the liquid level rises in the bottle to be refilled, -stopping or braking the rise of liquid in the bottle to be refilled (10), and therefore the flow of liquid in the bottle to be refilled, when the liquid level in the bottle to be refilled reaches a reduced passage section (C2.2, 26b) of the air passage which is arranged inside the bottle to be refilled above the opening end (C2.1) of the liquid passage, the reduced passage section of the air passage being adapted to the viscosity of the liquid.

13. Method for refilling a bottle to be refilled with liquid according to the preceding claim, characterized in that the liquid passage comprises a liquid conduit (C2) which is provided with the opening end (C2.1) of the liquid passage and which extends axially at least partly inside the bottle to be refilled (10).

14. Method for refilling a bottle to be refilled with liquid according to the preceding claim, characterized in that, prior to the steps of liquid flow, air rise and stopping or braking the rise of liquid, the method comprises a preliminary step during which the opening end (C2.1) of the liquid conduit (C2) which is fixed to the source bottle (30) is introduced inside the bottle to be refilled (10).

15. Method for refilling a bottle to be refilled with liquid according to claim 13 or 14, characterized in that the system comprises two rings (42, 60) mounted to rotate relative to each other, namely a ring (60) comprising, on the one hand, the liquid conduit (C2) which forms a first portion of the liquid passage and, on the other hand, a first portion of the air passage and, another ring (42) comprising, on the one hand, a second portion of the liquid passage and, on the other hand, a second portion of the air passage.

16. Method for refilling a bottle to be refilled with liquid according to the preceding claim, characterized in that one ring (42) is fixed to the source bottle (30) and the other ring (60) is fixed to the bottle to be refilled (10) with the opening end (C2.1) of the liquid conduit (C2) introduced inside the bottle to be refilled

17. Method for refilling a bottle to be refilled with liquid according to the preceding claim, characterized in that, when the other ring (60) is screwed onto the bottle to be refilled (10), the method comprises a step during which a relative rotational movement between the two bottles (30, 10), and therefore between the two rings, is carried out in order to put the two portions of the liquid passage and the two portions of the air passage of the two respective rings in fluid communication with each other and, thus, to allow the flow of liquid from the source bottle (30) to the bottle to be refilled (10) through the two portions of the liquid passage in fluid communication and the rise of the air contained in the bottle to be refilled (10) through the reduced passage section (C2.2, 26b) of the air passage and the two portions of the air passage in fluid communication.

18. Method for refilling a bottle to be refilled with liquid according to one of claims 12 to 17, characterized in that the system comprises a part (26) surrounding the liquid conduit (C2) coaxially and providing with the liquid conduit one or more radial spaces (El; C2.21', C2.22'; C2.21”, C2.22”, C2.23”) defining the reduced passage section (C2.2, 26b) of the air passage.

19. Method for refilling a bottle to be refilled with liquid according to the preceding claim, characterized in that, when removing the liquid conduit (C2; C2'; C2”) from the bottle to be refilled (10), the part (26) surrounding the liquid conduit scrapes the outer surface of the liquid conduit up to its opening end (C2.1; C2.1'; C2.1”).

Images