Bottle filling device with telescopic cannula

Abstract

The invention relates to a device for filling a bottle with a liquid product, comprising a container (1) holding said liquid product and a dispensing head (3) having a straight cannula (14) extending longitudinally, said cannula having a first liquid conduit portion (18) and a first air conduit portion (19) opening at a free end (20) of the cannula (14). The dispensing head comprises a first part, a second part, and a mechanism configured such that a rotation between the second part (8) and the first part (5) causes a translation of the cannula (14) between a folded position and an extended position. In the extended position, the first liquid conduit portion (18) is in fluidic communication with a second liquid conduit portion (30), and the first air conduit portion (19) is in fluidic communication with a second air conduit portion (31).The first portion of the liquid conduit and the second portion of the liquid conduit (30) open into the container (1). Figure for the abbreviation: Figure 3.

Description

Title of the invention: Device for filling a bottle with a telescopic cannula. TECHNICAL FIELD OF THE INVENTION

[0001] The present invention relates to the technical field of devices for filling a container with a liquid. It relates more particularly to devices for refilling, that is to say, for refilling (or "refilling", according to a common neologism), a bottle.

[0002] The present invention aims, as preferred but not exclusive applications, at refilling perfume bottles, as well as refilling bottles of liquid cosmetic products. STATE OF THE ART

[0003] Cosmetic and perfumery products, such as perfumes (including eau de parfum, eau de toilette, eau de Cologne), are generally presented in liquid form. Such a liquid product is marketed in a bottle, often a glass bottle, which is suitable for the presentation and distribution of the product.

[0004] Empty bottles are generally discarded. To avoid throwing away bottles that are often aesthetically pleasing, distinctive, and enhance the perceived value of the product they contain, and to reduce waste, the product is sometimes contained in a refill pack. This refill pack is a simple container designed to be returned in a more elaborately designed case. The case can thus facilitate product dispensing and also be aesthetically pleasing and enhance the product's perceived value through its shape, materials, etc.

[0005] This type of solution is generally well-suited to cream jars and certain oils. However, a system comprising a refill and a container can be complex to implement. Such an assembly can be heavy or fragile if a glass refill is intended for use in a glass jar (contact between two glass elements increases the risk of breakage).

[0006] Devices have therefore been developed to allow a perfume bottle to be refilled from another container which can be called a "source", which allows the bottle to be filled one or more times.

[0007] The general objective of these devices is to allow for simple and reliable filling of the bottle, without risk of splashing or overflow. Source containers with a flexible pouch have been considered (thus avoiding the need to draw air back into the container during perfume dispensing to fill a bottle), but these containers present compatibility problems with certain Perfumes, and especially those with flexible pouches, don't offer a smooth and complete flow by gravity. Furthermore, with very liquid formulas, the flexible pouch system isn't ergonomic because it's difficult to handle. Finally, for products like perfumes, which contain alcohol, there can be compatibility issues between the alcohol and the materials used to manufacture the flexible pouches.

[0008] Document EP2336079 discloses a device that aims to solve these problems. This device comprises a source container with a head having a poppet valve and two conduits, namely a liquid flow conduit and an air return conduit, arranged parallel to each other in a cannula extending from the neck of the source container to a nozzle located away from the reservoir of the container. The liquid inlet in the liquid flow conduit and the air outlet in the air return conduit are both located at the valve seat, in or near the neck of the source container. Near the nozzle, the liquid outlet is located lower (during filling) than the air inlet.

[0009] The device proposed in this document is nevertheless imperfect. The cannula extending from the neck of the source container and intended to be inserted into the bottle to be filled is unsightly. Furthermore, it requires the source container to be fitted with an elongated and complex cap. Protruding from the neck of the container, this cannula, which has a relatively small cross-section, is susceptible to breakage. In addition, due to the distance required for the proper functioning of the device between the air inlet and the liquid outlet, the portion of the cannula located between these two points becomes immersed in the liquid at the end of the filling process (until the liquid reaches the air inlet, which stops the filling). However, this portion of the cannula is potentially exposed to impurities between fillings, which can contaminate or soil the product in the bottle being filled.Finally, with this device, it is necessary to maintain vertical pressure on the device throughout the entire filling process to cause the product to be transferred.

[0010] Similarly, document EP2500277 describes another filling device for transferring liquid from a refill (source container) to a bottle. This device attaches to the neck of the source container and connects to the neck of the bottle. The device comprises a first part having a first liquid channel and a first air channel, and a second part having a second liquid channel and a second air channel. The first and second parts are fixed in translation but movable in rotation, which allows the channels to be aligned or misaligned, thus permitting or preventing the passage of liquid and air in compensation. In this device, the first part forms a cannula that is inserted into the neck of the bottle to be filled. This device thus presents the same drawbacks, related to the cannula, as that of EP2336079 described above. Furthermore, The sealing between two parts in planar contact which are also mobile in rotation is complex to achieve, so the liquid and air conduits are necessarily of small cross-section, which does not allow for rapid filling. Description of the invention

[0011] The present invention aims to remedy all or part of the drawbacks of the state of the technique mentioned above.

[0012] To this end, the invention relates to a device for filling a bottle with a liquid product, comprising a container having a neck forming an opening of the container and defining an axis of the neck, referred to as the longitudinal axis, and a reservoir containing said liquid product. The filling device further comprises a transfer head having a straight cannula extending longitudinally, said cannula having a first liquid conduit portion and a first air conduit portion extending within the cannula. The cannula has a free end into which the first liquid conduit portion and the first air conduit portion open. The cannula further comprises a first transverse opening opening into the first liquid conduit portion and a second transverse opening opening into the first air conduit portion.The transfer head further comprises a first part rigidly fixed to the neck of the container. The transfer head of the filling device comprises a second part fixed in translation and movable in rotation relative to the first part, around the longitudinal axis, and a mechanism configured such that a relative rotation of the second part with respect to the first part causes a longitudinal translation of the cannula, the cannula being mounted movable longitudinally in a sheath between a folded position, in which the first transverse opening and the second transverse opening are closed, and a deployed position, in which the first transverse opening is brought into fluidic communication with a first lumen formed in the wall of the sheath and the second transverse opening is brought into fluidic communication with a second lumen formed in the wall of the sheath.Thus, in the deployed position of the cannula, the first portion of the liquid conduit is in fluidic communication with a second portion of the liquid conduit, and the first portion of the air conduit is in fluidic communication with a second portion of the air conduit. The second portion of the liquid conduit opens into the container, and the second portion of the air conduit opens into the container.

[0013] The filling device proposed within the framework of the present invention thus makes it possible to fill, in particular to refill, a bottle with a liquid product from a container constituting the source of the liquid product. The filling is achieved via a simple rotational movement. The device proposed within the scope of the present invention allows the use of liquid and air conduits with large cross-sections, notably larger than those with conduit sections joined longitudinally. This is made possible by the fact that the seal is achieved transversely when the device's cannula is in the folded position, i.e., perpendicular to the direction of extension of the first liquid conduit section and the first air conduit section (or more generally, laterally to these sections), within a sheath. This device offers a better seal than comparable devices known in the prior art.Since the cannula is translationally mobile, it can be moved between its folded position, in which it is protected from damage and soiling, and an extended position once inserted into the neck of a bottle to be filled.

[0014] The second portion of the liquid conduit can open into the container at a first point and the second portion of the air conduit opens into the container at a second point, the second point being further longitudinally from the mouth of the container than the first point.

[0015] The average cross-sectional area of ​​the liquid duct may advantageously be greater than the average cross-sectional area of ​​the air duct. In other embodiments, the average cross-sectional area of ​​the liquid duct may be less than the average cross-sectional area of ​​the air duct.

[0016] The first portion of the liquid conduit and the first portion of the air conduit can open from the free end at the same longitudinal level.

[0017] The first portion of the liquid conduit and the first portion of the air conduit may open longitudinally or laterally from the free end of the cannula.

[0018] The first portion of the liquid conduit and the first portion of the air conduit can alternatively open from the free end at different longitudinal levels.

[0019] The filling device may include, when the cannula is in the folded position, a passage allowing air to be drawn in at a high point of the first portion of the liquid conduit in order to evacuate any liquid present in said first portion of the liquid conduit.

[0020] The second part may have a thread adapted to be screwed onto a neck of the bottle.

[0021] The second part may include a friction device adapted to create resistance to unscrewing when the thread of the second part is fully screwed onto the neck of the bottle.

[0022] The first transverse opening and the second transverse opening are advantageously located at the same longitudinal level, at a distance from the free end of the cannula.

[0023] Alternatively, the first transverse opening and the second transverse opening may be located at a distance from the free end of the cannula, at different longitudinal levels. In this case, the openings formed in the sheath wall are configured to nevertheless allow, in the deployed position of the cannula, the first and second transverse openings to each be in fluidic communication with the corresponding opening. In particular, the openings have a sufficient longitudinal dimension for this purpose. Such a configuration allows for sequential (non-simultaneous) opening or closing of the fluid duct and the air duct.

[0024] The first part can be rigidly fixed to the neck of the container, for example by snapping or by screwing tightly onto a thread of the neck of the container.

[0025] The filling device mechanism may include a longitudinal groove formed in a wall of the first part and a ramp formed in a wall of the second part, the cannula having a pin passing through the longitudinal groove and bearing against the ramp. The ramp may be formed by a slot extending at least partially along a portion of a spiral.

[0026] The sheath is advantageously positioned at least partly in the neck of the container.

[0027] The second portion of the liquid conduit can be formed, in whole or in part, between an outer wall of the sheath and an inner wall of the neck of the container.

[0028] The second portion of the liquid air conduit can be formed, in whole or in part, between an outer wall of the sleeve and an inner wall of the neck of the container.

[0029] The second portion of the liquid conduit can be formed from the first lumen.

[0030] The second portion of the liquid air duct can be formed by the second light.

[0031] The second portion of the air duct can be formed in the sheath.

[0032] The second portion of the liquid conduit can be formed in the sheath.

[0033] The cannula may include a flexible element adapted to cooperate with a ridge formed on an internal surface of the first part, so as to create a resistance which keeps the cannula in a folded position.

[0034] The filling device can be configured so that, with the cannula in the folded position, the tip of the cannula is in the same plane as a longitudinal end surface of the second part. The tip of the cannula is defined as the surface of the cannula end furthest longitudinally from the reservoir.

[0035] The transfer head may include a sleeve that covers the first and second parts, the sleeve being rigidly attached to the second part. In the folded position of the cannula, the tip of the cannula may be in the same plane as a longitudinal end surface of the sleeve.

[0036] The invention also relates to an assembly comprising a filling device as described above in which the second part has a thread adapted to be screwed onto a neck of the bottle and a bottle having a neck which has a thread, the bottle and the filling device being configured so that the first portion of liquid conduit is put into fluidic communication with the second portion of liquid conduit, and the first portion of air conduit is put into communication with the second portion of liquid conduit when the second part is screwed completely onto the thread of the neck of the bottle.

[0037] In such an assembly, when the second piece is screwed completely onto the thread of the bottle neck, the free end of the cannula can be positioned longitudinally in the bottle at a desired filling level. BRIEF DESCRIPTION OF THE FIGURES

[0038] Other advantages, purposes and particular features of the present invention will become apparent from the following non-limiting description of at least one particular embodiment of the devices and methods of the present invention, with reference to the accompanying drawings, in which: • [Fig.1] is a schematic perspective view of a filling device according to one embodiment of the invention; • [Fig.2] is a schematic cross-sectional view of the device in [Fig.1] showing in particular the transfer head it includes; • [Fig.3] is a schematic cross-sectional view of an assembly comprising the device of figures 1 and 2 and a bottle, during the filling of said bottle; • [Fig.4] is a schematic three-dimensional exploded view of a transfer head that can be used in the context of the present invention; • [Fig.5] is a schematic view showing a device according to an embodiment of the invention before connection to a bottle for the purpose of filling it; • [Fig.6] is a schematic three-dimensional view of an assembly comprising a filling device according to an embodiment of the invention connected to a bottle; • [Fig.7] is a schematic cross-sectional view of a transfer head that can be used in the context of the present invention; • [Fig.8] is a schematic cross-sectional view of a transfer head that can be used in the context of the present invention; • Figures 9 to 17 schematically represent, in cross-section, the free end of various embodiments of cannulas that can be used within the framework of the present invention; • Figures 18 to 20 are cross-sectional views of the upper part of a cannula that can be used in certain embodiments of the invention. DETAILED DESCRIPTION OF THE INVENTION

[0039] The present description is given as a non-limiting example of an embodiment.

[0040] Figure 1 is a schematic view of an example of a filling device for filling a bottle with a liquid product. The filling device comprises a container 1 that forms a reservoir 2 for holding a liquid product, for example, a perfume. The liquid contained in container 1 is intended to refill a bottle, for example, a perfume bottle, once the latter has been totally or partially emptied during its use.

[0041] The filling device includes a neck, which defines a longitudinal axis L, and on which a transfer head 3 is fixed.

[0042] The reservoir 2 can be made of various materials, for example glass, plastic material, metal, etc. Advantageously, but not necessarily, the wall of the container is opaque.

[0043] The filling device is intended to be placed above the bottle to be filled, with the transfer head oriented downwards, and to allow the bottle to be filled by gravity.

[0044] For this purpose, the transfer head 3 must selectively allow or prohibit the passage of the product from the container to the bottle.

[0045] Fig. 2 shows in cross-section the transfer head 3 of the filling device according to one embodiment of the invention.

[0046] The transfer head 3 is fixed to the neck 4 of the container 1. In particular, the transfer head 3 includes a first part 5 which is fixed to the neck 4. The first part 5 is rigidly fixed to the neck 4, that is to say that it is immobile and cannot be moved relative to the neck unless possibly a significant force is applied to it (this is generally referred to as an "anti-rotation" system).

[0047] For example, the collar 4 may have a thread 6 onto which a corresponding thread 7 of the first part 5 can be screwed and tightened. Once the first part is tightly tightened onto the collar 4, it is immobilized, and its removal would require significant unscrewing effort.

[0048] Alternatively, the transfer head 3 can be snapped onto the neck 4.

[0049] Alternatively or in addition, a bonding may be provided between the transfer head 3 and the neck 4.

[0050] The transfer head 3 also includes a second part 8. The second part 8 is mounted fixed in translation (in particular fixed in longitudinal translation) but free in rotation on the first part 5.

[0051] To this end, in the illustrated embodiment, the first part 5 comprises a first circular cylindrical wall 9 having a ring 10 on its external surface, while the second part 8 comprises a second circular cylindrical wall 11, the ring 10 being engaged in a groove formed on an internal surface of said second circular cylindrical wall 11

[0052] In the example shown here, a sleeve 12 is further attached and rigidly fixed to the first part 5. For example, the sleeve 12 has recesses into which radial elements carried by one end of the part 5 engage. This fixes the sleeve 12 to the first part 5, preventing it from rotating and translating. The sleeve 12 is thus integral with the part 5. The sleeve 12 externally covers the second part 8 as well as the first part 5. The sleeve 12 has, firstly, an aesthetic function, in that it conceals the first and second parts, so that only one part (the sleeve) is visible. Furthermore, by covering the second part 8, the sleeve 12 prevents the user's fingers from coming into contact with it during the rotation of the container 1 to connect it to a bottle and trigger the transfer of the product as explained below.Here, the sleeve extends from the bottom of the neck 4 of the container 1 to a longitudinal end surface 13 of the sleeve 12. The longitudinal end surface 13 of the sleeve 12 is also the longitudinal end surface of the transfer head outside of filling operations, as explained below.

[0053] The filling device also includes a cannula 14. The cannula 14 is an elongated part, which extends longitudinally.

[0054] The filling device includes a mechanism configured such that the rotation (relative to the first part 5 and the container 1) of the second part 8 causes a longitudinal translation of the cannula 14. The mechanism advantageously allows a simple translation of the cannula 14, or, alternatively, a translation combined with a rotation around the longitudinal axis L. A simple translation is nevertheless advantageous for the sealing of the device.

[0055] The mechanism may thus include a ramp system cooperating with a pin 15 carried by the cannula. More particularly, and as can be seen in [Fig. 4], the mechanism may include a longitudinal groove 16 formed in the wall of the first part 5, which serves to guide the pin 15 vertically and prevents the rotation of the cannula 14. The wall of the second part 8, for its part, includes a slot 17 which forms a portion of a spiral (for example a quarter of a spiral) and which forms the ramp. Thus, the relative rotation of the second part 8, while the container 1 is rotated relative to the bottle to which it is attached, advances the pin 15 in the slot 17, causing a movement of the pin 15 in the longitudinal groove 16, which causes the entire cannula 14 to move in longitudinal translation.

[0056] The cannula can thus be translated between two extreme positions, namely a so-called folded position and a so-called deployed position, which are explained below.

[0057] For better distribution of forces and to limit any risk of blocking, the mechanism may advantageously include two ramps, in the form of two slots 17, and / or two longitudinal grooves 16.

[0058] The shape or “profile” of the ramp or ramps allows control of the locking and unlocking of the system, as explained below.

[0059] The cannula 14 comprises a first liquid conduit portion 18 and a first air conduit portion 19. The first liquid conduit portion and the first air conduit portion are formed within the cannula. The first liquid conduit portion 18 and the first air conduit portion 19 extend parallel to each other, advantageously along the longitudinal direction.

[0060] The first portion of liquid conduit 18 and the first portion of air conduit 19 may have respective cross-sections of the same area, or, advantageously, the cross-section of the first portion of liquid conduit 18 may be greater than that of the first portion of air conduit 19.

[0061] The cannula 14 has an end, called the free end 20, which is the distal end opposite the reservoir 2.

[0062] The first portion of the liquid conduit 18 and the first portion of the air conduit 19 both open at the free end 20 of the cannula 14. The free end corresponds to a portion of the cannula 14, distal to the reservoir 2. The free end 20 measures a few millimeters, for example 5mm, longitudinally.

[0063] The opening of the first liquid conduit portion 18 and that of the first air conduit portion 19 may, in certain embodiments, be located longitudinally in the same plane. In this case, the user does not perceive, when viewing the cannula from the side, the presence of two conduit portions within it.

[0064] Other configurations of the free end 20 of the cannula 14 can be used within the scope of the present invention. Different configurations, as well as their advantages and limitations, are described below with reference to Figures 9 to 17.

[0065] The first portion of the liquid conduit 18 and the first portion of the air conduit 19 do not open at the opposite end 21 of the cannula. The first portion of the liquid conduit 18 and the first portion of the air conduit 19 extend into the cannula up to a certain level, which is distant from the other longitudinal (opposite) end of cannula 14.

[0066] A first transverse opening 22, which may be perpendicular to the longitudinal direction, passes through the lateral wall of the cannula 14 and opens into the first portion of the liquid conduit 18.

[0067] A second transverse opening 23, which is perpendicular to the longitudinal direction, passes through the lateral wall of the cannula 14 and opens into the first portion of the air duct 19.

[0068] The filling device also includes a sleeve 24. The sleeve 24 is a part comprising a cylinder whose cross-section corresponds, within a functional clearance, to that of a part of the cannula 14. The cannula 14 is mounted in the sleeve 24, which guides it in longitudinal translation.

[0069] In addition, the sheath 24 has two openings formed in the wall 27 of the sheath, that is to say the wall of the cylinder formed by the sheath, namely a first opening 25 and a second opening 26.

[0070] As indicated above, the cannula 14 can adopt a folded position and an extended position. The folded position of the cannula corresponds to the longitudinal position of the cannula in which the free end 20 of the cannula is closest to the neck 4 of the container 1. The extended position of the cannula 14 corresponds to the longitudinal position of the cannula 14 in which the free end 20 of the cannula is furthest from the neck 4 of the container 1.

[0071] In the folded position (and in the illustrated embodiment, in any position other than the deployed position), the first transverse opening and the second transverse opening do not communicate with the first light 25 and second light 26. Thus, the liquid in the container 1 cannot pass into the first portion of the liquid conduit 18, and air cannot enter the container 1 via the first portion of the air conduit 19. This isolation prevents the liquid in the container 1 from flowing out.

[0072] In particular, in order to guarantee a perfect seal of the product, one or more seals 28 may be interposed between the inner surface of the wall 27 of the sleeve 24 and the cannula 14. In the example shown, the seals 28 are carried by the wall 27. Alternatively, they could be carried by the cannula 14.

[0073] Fig. 7 and Fig. 8 illustrate other possible configurations for the seals 28, making it possible to ensure the desired sealing.

[0074] Furthermore, in the embodiment shown in Figures 7 and 8, the first part 5 and the sleeve 24 are formed as a single unit. This feature is independent of the embodiment chosen for sealing and is applicable to any embodiment.

[0075] The embodiment of [Fig.7] includes three seals 28. A first seal 281 is carried by the wall of the sleeve 24 (here formed by the first part 5) and prevents the passage of liquid product between the cannula 14 and the sleeve 28 at its lower end, i.e. opposite the reservoir of the container (the notions of "top" and "bottom" being understood as they have been defined above). A second seal 282 is carried by the cannula 14, near and below the first transverse opening 22 and the second transverse opening 23. A third seal 283 is carried by the cannula 14, near and above the first transverse opening 22 and the second transverse opening 23. When the cannula 14 is in the deployed position, the second seal 282 is located below the first lumen 25 and the second lumen 26, while the third seal 283 is located above the first lumen 25 and the second lumen 26.The fluid seal of the air duct and the liquid duct is thus achieved.

[0076] The embodiment of [Fig. 8] includes two seals 28. As in the embodiment described with reference to [Fig. 7], a first seal 281 is carried by the wall of the sleeve 24 (here formed by the first part 5) and prevents the passage of liquid between the cannula 4 and the sleeve 28 at its lower end. A second seal 282 is carried by the cannula 14, near and below the first transverse opening 22 and the second transverse opening 23. When the cannula 14 is in the deployed position, the second seal 282 is positioned below the first opening 25 and the second opening 26. The sleeve 24 is closed by a wall in its upper part, so that the air and liquid passages are sealed.

[0077] Other seal configurations can be envisaged within the framework of the present invention. For example, a single seal in the form of an elastomer sleeve and formed on the cannula or in the sheath can combine the function of the first seal 281 and that of the second seal 282, or even of the third seal 283 (compared to embodiments in which there is a third seal 283).

[0078] Alternatively, the seal can be formed without a gasket, by a precise fit between the surfaces of the cannula 14 and the sleeve 24.

[0079] Alternatively, one or more of the seals of the embodiments described above may take the form of a lip or other flexible element, which may be attached to the wall 27 or the cannula 14, or be monobloc with the wall 27 or the cannula 14. Such a lip or other flexible element makes it possible to locally fill the gaps, while ensuring sealing and low friction between the parts.

[0080] In the deployed position, the first transverse opening 22 is brought into fluidic communication with the first light 25. For this purpose, the first transverse opening 22 faces the first light 25, or the first transverse opening 22 opens into the same volume (for example formed between two joints) as the first light 25.

[0081] Similarly, in the deployed position, the second transverse opening 23 is put into fluidic communication with the second light 26. For this, the second transverse opening 23 faces the second light 26, or the second transverse opening 23 opens into the same volume (for example formed between two joints) as the second light 26.

[0082] The first light 25 opens opposite an inner wall 29 of the neck 4.

[0083] A second portion of liquid conduit 30 is thus formed between the sheath 24 and the inner wall 29 of the neck 4, up to the base of the neck 4 corresponding to the beginning of the reservoir 2. Alternatively, the second portion of liquid conduit 30 could be formed in the sheath 24, the first lumen 25 then opening into this second portion of liquid conduit 30.

[0084] A second portion of air duct 31 is formed in the sleeve 24, and the second light 26 opens into the second portion of air duct 31.

[0085] The second portion of liquid conduit 30 and the second portion of air conduit 31 are not necessarily understood as an elongated conduit of small cross-section, but may have various configurations.

[0086] In particular, in certain embodiments in which the second portion of liquid conduit and the second portion of air conduit may be limited respectively to said first light 25 and second light 26, and extend into the thickness of the sleeve 24 at the level of these lights.

[0087] Thus, in the deployed position of the cannula, the first portion of the liquid conduit is in fluidic communication, via the first lumen 25, with the second portion of the liquid conduit. The first portion of the air conduit is in fluidic communication, via the second lumen 26, with the second portion of the air conduit 31.

[0088] Thus, the second portion of the liquid conduit (and therefore more generally the liquid conduit) opens into the container at a first point. This first point is the point of entry of the liquid into the liquid conduit.

[0089] The second section of the air duct (and therefore more generally the air duct) opens into the container at a second point. This second point is the air outlet point of the air duct, the air compensating for the volume of liquid product extracted from the container.

[0090] Said second point (air outlet) is, in the embodiment shown here, further longitudinally from the mouth of the container, i.e. from the end of the neck 4, than the first point (liquid inlet). In other words, when the container is positioned with the transfer head downwards, for To perform gravity filling of a bottle, the air outlet in the container is higher than the liquid inlet in the liquid conduit.

[0091] As can be seen in [Fig.2], in the folded position, the end of the cannula 14 (i.e. the surface of the cannula furthest from the reservoir) is located in the same plane, perpendicular to the longitudinal direction, as the longitudinal end surface 13 of the sleeve 12.

[0092] More generally, the filling device is preferably configured so that the end of the cannula 14 is at the same level, longitudinally, as the end 32 of any part of the transfer head furthest longitudinally from the reservoir 2.

[0093] For example, in an embodiment not comprising a sleeve 12, in which the second part 8 would be directly operated by the user, in the folded position the end of the cannula 14 is at the same level as a longitudinal end surface of the second part 8.

[0094] In the folded position, the cannula 14 is thus covered and protected by the rest of the transfer head. In particular, the cannula 14 is protected from any soiling, without the need for an additional cap. A cap may nevertheless be provided to cover the transfer head. The cannula 14 is also protected against mechanical actions that could break it, the cannula having a small cross-section, in particular small enough to be inserted into the neck of a bottle to be filled.

[0095] In the embodiment shown here, the cannula 14 comprises a flexible element 33. The flexible element 33, which may be a tab, a deformable disc, etc., is adapted to cooperate with a ridge 34 formed on an internal surface of the first part. Thus, as the cannula is brought into a folded position, the interaction between the flexible element 33 and the ridge 34 passes over the ridge 34, creating a resistance that holds the cannula in the folded position. Only by overcoming this resistance (so that the flexible element 33 passes under the ridge 34) can the cannula 14 be brought into its extended position.

[0096] Alternatively, the mechanism enabling the movement of the cannula is configured to provide this resistance. For example, the slot 17 may have a horizontal end portion (in a plane perpendicular to the longitudinal direction), or even a slightly upward portion in the opposite direction to that of the helical portion, in which the pin is housed when the cannula 14 is in the folded position. Engaging the pin in the helical portion of the slot 16 to bring the cannula 14 to the deployed position then requires overcoming a slight resistance. A stop may also be provided in the slot 16, creating resistance to movement.

[0097] Thus, the profile of the slot at the top (reservoir side of container 1) and bottom (bottle side, during a transfer) of the slot is not the same. The profile at the lower end of The slot can be adapted to create rotational resistance to ensure that the bottle is screwed securely onto the transfer head before the product transfer begins.

[0098] At the upper end of the slot, a resistance can also be created, but one that is minimal enough to allow the pin to move within the slot without risking the resistance causing the cannula to unscrew itself from the dispensing head (the cannula would then not return to its folded position and the product could leak). In the deployed position, as shown in [Fig. 3], the free end 20 of the cannula 14 has been moved longitudinally by means of the mechanism described above, away from the longitudinal end surface 13.

[0099] In the preferred embodiment shown here, the transfer head, and more particularly the second part 8, has a thread 35 adapted to be screwed onto a neck 36 of the bottle 37. Thus, when a user wishes to fill the bottle 37, he positions the container 1 above the bottle 37, the container being positioned with the transfer head at the bottom and above the neck 36 of the bottle 37. This position is shown in [Fig. 5].

[0100] The user turns the container so that the thread 35 of the second part 8 screws onto the neck 36 of the bottle 37.

[0101] Once the container is screwed (or more generally positioned) onto the neck 36 of the bottle 37 (the container 1 is then connected to the bottle 37, as illustrated in [Fig. 6]), continuing to rotate the container 1 causes the second part 8 to rotate relative to the first part 5, so that the cannula 14 gradually descends into the bottle 37. The rotation continues until the cannula 14 is in the deployed position. A stop 38 and / or the slot 17 can stop the movement of the cannula when it reaches the deployed position. In the example shown in [Fig.4], the first part 5 has a lug 40 (in practice in this example, two lugs 40) which is inserted into a circular arc groove 41 of the second part 8. By butting against the ends of the circular arc groove 41, the lug limits the relative rotation between the second part 8 and the first part 5.

[0102] In order to prevent unintentional unscrewing of the second part (8) vis-à-vis the neck 36 of the bottle 37, the neck of the bottle may have undercut elements which create friction on the second part 8. This makes it possible to create at the time of locking (end of screwing of the second part 8), a friction force greater than that generated by the single pin in the ramp, and prevents, to some extent, unintentional unscrewing of the transfer head (which would unintentionally stop the transfer).

[0103] Alternatively, the second part 8 may include a friction device, which creates resistance to unscrewing, by friction, when the thread 35 of the second Part 8 is fully screwed onto the neck 36 of the bottle 37. The friction device may include, for example, flexible claws that radially clamp the end of the neck 36 of the bottle 37 when part 8 is fully screwed on. As another example, the friction device may include a flexible seal that bears against the end of the neck 36 of the bottle 37 when part 8 is fully screwed on.

[0104] In particular, when the user wishes to detach the container 1 from the bottle 37, the elements creating a resistance ensure that the cannula returns to its folded position, in which the product can no longer flow from the cannula, before the thread of the container begins to unscrew from the neck of the bottle.

[0105] Once the cannula is in the deployed position, it extends longitudinally in the neck 36 and in the internal volume 39 of the bottle 37 up to the maximum level at which the bottle 37 is to be filled.

[0106] The first portion of the liquid conduit being fluidly connected to the second portion of the liquid conduit, the liquid present in the reservoir 2 of the container 1 can flow into the bottle 37, insofar as a corresponding volume of air can pass from the bottle to the container, the first portion of the air conduit being in fluidic communication with the second portion of the air conduit.

[0107] The difference in level in the container between the air outlet and the liquid inlet (the air outlet being higher) ensures the slight pressure difference in the liquid which allows the liquid to flow and the air to return in compensation.

[0108] Furthermore, when the air outlet in container 1 is close to the bottom of container 1, during filling the air compensating for the transferred liquid is not released into the liquid contained in container 1 but directly into the air present in the container. This limits the noise that can occur when air is released into the liquid in the container.

[0109] Alternatively, or in addition to this difference in level, a difference in cross-sectional area between the liquid conduit (comprising the first and second portions of the liquid conduit) and the air conduit (comprising the first and second portions of the air conduit) can facilitate or even cause the flow of liquid and the return of air to compensate for the volume of liquid transferred. In this case, the cross-sectional area of ​​the liquid conduit can be greater than that of the air conduit. The average cross-sectional area of ​​the liquid conduit compared to the average cross-sectional area of ​​the air conduit can be a relevant reference.

[0110] Filling stops when the surface of the liquid transferred into the bottle reaches the free end of the cannula 14. At this point, the liquid prevents air from entering. in the air duct. Since the compensation of the volume of liquid transferred by air can no longer take place, the flow of liquid stops.

[0111] Once the filling is complete, the user rotates the container relative to the bottle in the unscrewing direction. The cannula 14 then begins to return to its folded position. The first transverse opening 22 is no longer in fluidic communication with the first lumen 25, and the second transverse opening 23 is no longer in fluidic communication with the second lumen 26. This seals the liquid and air channels, allowing the cannula to be removed from the bottle without any liquid product flowing from the cannula. To achieve this, the rotation is continued after the cannula has reached its folded position. This unscrews the container 1 from the bottle 37 and finally disconnects it.

[0112] Alternatively, the user can stop the transfer at any time by rotating the container relative to the bottle in the unscrewing direction. As described above, this initially returns the cannula 14 to its folded position, thus stopping the transfer of the liquid product. If the rotation is continued, after the cannula has reached its folded position, this unscrews the container 1 from the bottle 37 and finally disconnects it.

[0113] Once the cannula 14 has been brought back into the folded position, it is protected, as explained above, until a new filling of a bottle by the container.

[0114] Alternatively, the second part 8 may be unthreaded. In this case, the second part 8 is fixed to the sleeve 12 (if present). The second part 8 can be rotated relative to the first part 5, either directly or by actuating the sleeve 12, by the user. In this case, it is not necessary to screw the transfer head onto a bottle, and, on the contrary, the device can be used regardless of the neck configuration of the bottle to be filled. Indeed, the user can directly control the movement of the cannula from its folded to its extended position.

[0115] As indicated above, different free end configurations 20 of the cannula 14 can be used, alternatively to each other, in a filling device according to the present invention.

[0116] Figures 9 to 17 represent various possible configurations for the free end of the cannula 20.

[0117] Figure 9 shows a cross-section of the configuration described above and illustrated in particular in Figures 1 to 3. The first portion of the liquid conduit 18 and the first portion of the air conduit 19 open longitudinally at the free end 20, and at the same longitudinal level. This configuration offers numerous advantages, particularly aesthetic ones, and prevents a significant portion of the cannula 14 from being immersed in the dispensed liquid at the end of the filling process. However, it has It has been observed that with certain liquids, a droplet of the liquid product can form during filling, this droplet tending to settle at the inlet of the first section of the air duct. This can disrupt the filling process, in particular it can lead to an irregular flow of the liquid, or even, in some cases, a blockage.

[0118] The embodiments shown in Figures 10 to 17 avoid this problem.

[0119] In the embodiment of [Fig. 10], the free end is beveled, Symmetrically, on either side of the longitudinal wall 42 extending between the first liquid conduit section 18 and the first air conduit section 19. The first liquid conduit section 18 and the first air conduit section 19 open at the same longitudinal level, but this configuration prevents a drop of liquid product from passing from the liquid conduit outlet to the air conduit inlet. This configuration remains aesthetically pleasing. The filling device can be configured so that the end of the beveled portion is at the same longitudinal level as the longitudinal end surface of the second part 8 or the sleeve 12 (when the device includes a sleeve 12), thus rendering the cannula invisible when folded.Alternatively, by configuring the filling device so that the beveled portion of the cannula protrudes from the longitudinal end surface of the second part 8 or sleeve 12 (when the device has a sleeve 12), the beveled portion can help to position the filling device on the neck of the bottle to be filled.

[0120] In the embodiment of [Fig. 11], the free end 20 of the cannula 14 is beveled only on one side of the longitudinal wall 42. Preferably, the bevel is formed on the side of the first portion of the air duct. Since the liquid product exits the cannula lower than the air inlet, the risk of disrupting the air inlet in the first portion of the air duct 19 is avoided.

[0121] In the embodiment of [Fig. 10] and in that of [Fig. 11], the filling stops automatically when air can no longer enter the air duct, i.e. when the bevel formed on the side of the first portion of the air duct is immersed.

[0122] In the embodiment of [Fig. 12], the first liquid conduit section 18 and the first air conduit section 19 open longitudinally at the free end 20, and at the same longitudinal level, but the longitudinal wall 42 is slightly extended downwards. The longitudinal wall 42 thus forms a barrier preventing any communication, at the free end 20, between the liquid conduit and the air conduit. The protrusion of the longitudinal wall 42 beyond the opening of the first liquid conduit section 18 and the first air conduit section 19 can be very small, so that the aesthetics of the device are not affected.

[0123] In the embodiment of [Fig. 13], the first liquid conduit portion 18 and the first air conduit portion 19 open longitudinally at the free end 20, at the same longitudinal level. However, compared to the embodiment of [Fig. 9], a notch 43 is formed at the end of one of the conduits, preferably at the end of the first air conduit portion 19. The notch 43 can be discreet, so as not to detract from the appearance of the cannula 14. In the example shown here, the notch 43 ensures that the air intake into the air conduit is not disrupted, even if a drop of liquid product were to land at the longitudinal end of the first air conduit portion 19. In this embodiment, the filling stops automatically when the notch 43 is submerged in the liquid product. A small part of the free end 20 therefore comes into contact with the liquid product.

[0124] Figure 14 represents a variant of the embodiment of Figure 13, in which the notch 43 is replaced by a hole 44. The hole 44, located slightly above the free end 20, allows a regular air intake into the first portion of the air duct 19, even if a drop of liquid product were to completely or partially obstruct the opening of the air inlet duct. In this embodiment, filling stops automatically when the hole 44 is submerged in the liquid product.

[0125] Figure 15 illustrates an embodiment in which the first portion of the liquid conduit 18 and the first portion of the air conduit 19 open, at the free end 20, not longitudinally but transversely, respectively through a transverse liquid orifice 45 and a transverse air orifice 46. Since the openings of the air conduit and the liquid conduit are transversely opposed (for example, diametrically opposed if the cannula is cylindrical with a circular cross-section), the air inlet is not disturbed by the liquid outlet. This configuration offers the advantage of completely protecting the air and liquid conduits when the cannula is in the folded position. However, a potential drawback is that, with the liquid exiting transversely, this is less aesthetically pleasing.

[0126] Figure 16 represents a variant of the embodiment of Figure 15. In this embodiment, instead of forming a right angle to open laterally and transversely from the cannula as in Figure 15, the first portion of the liquid conduit 18 and the first portion of the air conduit 19 form a bend, so that they open laterally from the free end of the cannula 14 at a downward angle. The same advantage as with the embodiment of Figure 15 is obtained, but this configuration facilitates the flow of fluids in the cannula and improves the aesthetics of the flow of the liquid product exiting the cannula 14.

[0127] Figure 17 shows an embodiment in which the first portion of the liquid conduit 18 and the first portion of the air conduit 19 open at the free end 20 at different longitudinal levels. The effect is similar to that obtained with the embodiment of Figure 11.

[0128] Obviously, other embodiments are conceivable, in particular by adapting or combining the various configurations presented above.

[0129] On another aspect of the invention, the Applicant nevertheless noted that, in certain embodiments, liquid product could remain in the first portion of the liquid conduit, or even sometimes be found in the first portion of the air conduit, after use of the device, i.e. after a transfer of said liquid product.

[0130] This phenomenon is linked to the fact that the first portion of the liquid conduit 18 is hermetically sealed at its upper part; the liquid is retained by the combination of capillary forces and the impossibility, due to the seal, of compensating with air for the volume of liquid that would flow out. For the same reason, if liquid is drawn into the first portion of the air conduit, it can become trapped there.

[0131] It is preferable to avoid having a small quantity of liquid product remain in the device once the transfer has ceased. This small quantity of liquid is no longer protected from external contaminants. Moreover, this small quantity of liquid could leak from the device between uses.

[0132] To allow the evacuation of all the liquid product present in the first portion of the liquid conduit (or even in the first portion of the air conduit) when a transfer is stopped, several solutions have been developed allowing an air supply at the top of the first portion of the liquid conduit 18 when the cannula 14 is in the folded position.

[0133] According to a first example, with reference to [Fig. 8], when the cannula 14 is in the folded position or close to its folded position, air can pass from the second transverse opening 23 to the first transverse opening 22 via the chamber 47 located above the opposite longitudinal end 21 of the cannula and, in this embodiment, around the cannula above the second seal 282. Thus, when the user turns the container relative to the bottle at the end of the transfer of the liquid product, and the cannula 14 returns to its folded position, the product present in the first portion of the liquid conduit flows out. Indeed, air is drawn back into said first portion of the liquid conduit 18, which makes it possible to compensate for the volume of product that flows out. This air is drawn back in via the first portion of the air conduit 19 and via the chamber 47.In this embodiment, any liquid that might be incidentally present in the first portion of the air duct is expelled. during the passage of the cannula in the folded position, due to the expulsion, via the first portion of the air duct and via the first portion of the liquid duct, of the excess air present in chamber 47 (whose volume decreases during the passage of the cannula in the folded position).

[0134] A first alternative solution is shown in [Fig. 18]. The solution shown in [Fig. 18] is also compatible with an embodiment of the invention in which the cannula has a seal 28 above the first transverse opening 22 and the second transverse opening 23 (while also being usable in the absence of such a seal). In the embodiment of [Fig. 18], an annular groove 48 is formed around the cannula 14. The annular groove 48 is preferably located above the first transverse opening 22 and the second transverse opening 23 and communicates fluidly with these transverse openings. This annular groove 48 allows passage from the second transverse opening 23 to the first transverse opening 22 when the cannula is in a folded position or close to its folded position.The residual liquid product present in the first section of the liquid conduit is then evacuated, as explained above, the volume of liquid evacuated being compensated by an air intake carried out via the first section of the air conduit 19, the second transverse opening 23, the groove 48 and the first transverse opening 22. The position of the groove above the first transverse opening 22 and the second transverse opening 23 nevertheless ensures that the operation of the device is not disrupted during a transfer.

[0135] Figure 19 shows another embodiment in which an air passage 49 fluidly connects the first transverse opening 22 and the second transverse opening 23. The air passage 49 is located above said first transverse opening 22 and second transverse opening 23, and passes through the longitudinal wall 42. The result is identical to that obtained with the embodiment of Figure 18, and is usable in embodiments with or without a seal 28 above the first transverse opening 22 and the second transverse opening 23.

[0136] Finally, [Fig. 20] shows an embodiment in which a channel 50 connects the free end 20 of the cannula 14 to its opposite end 21. When the cannula is returned to its folded position, and the free end 20 is no longer immersed in the liquid product, air can thus pass through the channel 50 to reach a chamber 47 (see [Fig. 8]) and the first transverse opening 22. This air intake allows the residual liquid present in the first portion of the liquid duct to be evacuated when the cannula is returned to its folded position. This solution also ensures the drainage of any liquid incidentally present in the first portion of the air duct, by air intake via the channel 50.

[0137] Obviously, other ways of achieving an upward air intake of the first portion of the liquid conduit are conceivable, in particular on the basis of the embodiments described above.

[0138] For example, starting from the embodiment of [Fig.8], in particular, it is possible to add a communication orifice between a high end of the first portion of the liquid conduit and the chamber 47, which facilitates the re-entry of air and also ensures the emptying of any liquid incidentally present in the first portion of the air conduit.

[0139] According to another example, a channel can be formed out of the cannula, when the cannula is in a folded position, between the ambient air or preferably the air present in the bottle 37 and a high point of the first portion of liquid conduit, for example the first transverse opening 22.

[0140] The filling device proposed in the context of the present invention thus allows for the easy filling of a bottle from a container holding a liquid product. The filling process is simple and intuitive, consisting simply of screwing the container onto the bottle until the filling occurs by gravity. Furthermore, the device's configuration allows for automatic stopping of the filling process when a certain level of product is reached in the bottle (or alternatively, a simple and intuitive manual stop). The filling device proposed in the context of the present invention is particularly well-suited for filling a perfume bottle.

[0141] Nomenclature of reference signs: • 1: container • 2: reservoir • 3: Transfer head • 4: col • 5: first room • 6: threading (from neck 4) • 7: corresponding thread (of the first part 5) • 8: second room • 9: first circular cylindrical wall • 10: ring • 11: second circular cylindrical wall • 12: sleeve • 13: longitudinal end surface (of sleeve 12) • 14: cannula • 15: pawn • 16: longitudinal groove • 17: slot • 18: first section of liquid conduit • 19: first section of air duct • 20: free end • 21: opposite longitudinal end • 22: first transverse opening • 23: second transverse opening • 24: sheath • 25: First light • 26: second light • 27: sheath wall • 28: joints • 281: first joint • 282: second joint • 283: third joint • 29: inner wall of the neck • 30: second section of liquid conduit • 31: second section of air duct • 32: end (of the transfer head) • 33: flexible element • 34: bulge • 35: threading (of the second part 8) • 36: neck of the bottle • 37: bottle • 38: stop • 39: internal volume (of bottle 37) • 40: ergot • 41: circular arc groove • 42: longitudinal wall • 43: notch • 44: hole • 45: transverse liquid orifice • 46: transverse air orifice • 47: room • 48 annular groove • 49: air passage • 50: channel

Claims

1. Demands A device for filling a bottle with a liquid product, comprising a container (1) having a neck (4) forming an opening of the container (1) and defining an axis of the neck, referred to as the longitudinal axis, and a reservoir (2) containing said liquid product, the filling device further comprising a transfer head (3), the transfer head (3) comprising a straight cannula (14), which extends longitudinally, said cannula comprising a first portion of liquid conduit (18) and a first portion of air conduit (19) which extend into the cannula (14), the cannula (14) comprising a free end (20) into which the first portion of liquid conduit (18) and the first portion of air conduit (19) open, the cannula (14) further comprising a first transverse opening (22) opening into the first portion of liquid conduit (18) and a second transverse opening (23) opening into the first portion of air conduit (19),the transfer head (3) further comprising a first part (5) rigidly fixed to the neck (4) of the container (1), the filling device being characterized in that the transfer head (3) comprises a second part (8) fixed in translation and movable in rotation relative to the first part (5), around the longitudinal axis, and a mechanism configured such that a relative rotation of the second part (8) relative to the first part (5) causes a longitudinal translation of the cannula (14), the cannula (14) being mounted movable longitudinally in a sleeve (24) between a folded position, in which the first transverse opening (22) and the second transverse opening (23) are closed, and a deployed position,in which the first transverse opening (22) is brought into fluidic communication with a first lumen (25) formed in the wall of the sheath (27) and the second transverse opening (23) is brought into fluidic communication with a second lumen (26) formed in the wall of the sheath (27), so that in the deployed position of the cannula (14) the first portion of the fluid conduit (18) is in, fluidic communication with a second portion of liquid conduit (30), and the first portion of air conduit (19) is in fluidic communication with a second portion of air conduit (31), the second portion of liquid conduit (30) opening into the container and the second portion of air conduit opening into the container.

2. Filling device according to claim 1, wherein (1) the second portion of liquid conduit (30) opening into the container at a first point, the second portion of air conduit (31) opening into the container (1) at a second point, the second point being further longitudinally away from the mouth of the container (1) than the first point.

3. Filling device according to claim 1 or claim 2, wherein the first portion of liquid conduit (18) and the first portion of air conduit (19) open from the free end (20) at the same longitudinal level.

4. Filling device according to claim 3, wherein the first portion of liquid conduit (18) and the first portion of air conduit (19) open longitudinally or laterally from the free end (20) of the cannula (14).

5. Filling device according to claim 1 or claim 2, wherein the first portion of liquid conduit (18) and the first portion of air conduit (19) open from the free end (20) at different longitudinal levels.

6. A filling device according to any one of the preceding claims comprising, when the cannula (14) is in the folded position, a passage allowing air to be drawn in at a high point of the first portion of the liquid conduit in order to evacuate any liquid present in said first portion of the liquid conduit.

7. Filling device according to any one of the preceding claims, wherein the second part (8) has a thread (35) adapted to be screwed onto a neck (36) of the bottle (37).

8. Filling device according to claim 7, wherein the second part includes a friction device adapted to create resistance to unscrewing when the thread (35) of the second part (8) is fully screwed onto the neck (36) of the bottle (37).

9. Filling device according to claim any one of the preceding claims, wherein the first transverse opening (22) and the second transverse opening (23) are located at the same level longitudinally, at a distance from the free end (20) of the cannula (14).

10. Filling device according to any one of claims 1 to 8, wherein the first transverse opening (22) and the second transverse opening (23) are located at a distance from the free end (20) of the cannula (14), at different levels longitudinally.

11. Filling device according to any one of the preceding claims, wherein the first part (5) is rigidly fixed to the neck (4) of the container (1) by snapping or by screwing tightly onto a thread (6) of the neck (4) of the container (1).

12. Filling device according to any one of the preceding claims in which said mechanism comprises a longitudinal groove (16) formed in a wall of the first part (5) and a ramp formed in a wall of the second part (8), the cannula (14) comprising a pin (15) passing through the longitudinal groove (16) and bearing against the ramp.

13. Filling device according to any one of the preceding claims, wherein the sleeve (24) is positioned at least partly in the neck (4) of the container (1).

14. Filling device according to any one of the preceding claims, wherein the second portion of liquid conduit (30) is formed by the first light (25) and / or the second portion of air conduit is formed by the second light (26).

15. Filling device according to any one of the preceding claims, wherein the second portion of liquid conduit (30) is formed in the sleeve (24) and / or the second portion of air conduit (31) is formed in the sleeve (24).

16. A filling device according to any one of the preceding claims, wherein the cannula (14) has a flexible element (33) adapted to cooperate with a ridge (34) formed on an internal surface of the first piece (5), so as to create a resistance which keeps the cannula (14) in a folded position.

17. A filling device according to any one of the preceding claims, wherein one end of the cannula (14) is defined as the surface of the cannula end furthest longitudinally from the reservoir, in the folded position of the cannula said cannula end is in the same plane as a longitudinal end surface (13) of the second part (8),

18. Device according to any one of claims 1 to 16, wherein the transfer head (3) comprises a sleeve (12) which covers the first part (5) and the second part (8), the sleeve (12) being rigidly connected to the second part (8).

19. Filling device according to claim 18, wherein, an end of the cannula (14) being defined as the surface of the end of the cannula furthest longitudinally from the reservoir, in the folded position of the cannula (14), said end of the cannula (14) is in the same plane as a longitudinal end surface (13) of the sleeve (12).

20. Assembly comprising a filling device according to claim 7 or claim 8 and a bottle (37) having a neck (36) which has a thread, the bottle (37) and the filling device being configured so that the first portion of liquid conduit (18) is made to communicate fluidically with the second portion of liquid conduit (30), and the first portion of air conduit (19) is made to communicate with the second portion of liquid conduit (30) when the second part (8) is screwed completely onto the thread of the neck (36) of the bottle (37).

21. Assembly according to claim 20, wherein, when the second part (8) is screwed completely onto the thread of the neck (36) of the bottle (37), the free end (20) of the cannula (14) is positioned in the bottle longitudinally at a desired filling level.

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