Fluid transfer device

Abstract

A liquid transfer device is disclosed comprising a first part and a second part, where the first part comprises a cylindrical main nozzle and the second part comprises another nozzle, said device comprising a rotating system for closing or opening a viscous liquid channel, the rotating system is configured by securing the second portion on the first portion.

Description

Technical Field

[0001] The present invention pertains to the transfer of general fluids, and more precisely, to the application field of the transfer of liquid products for filling empty containers. Specifically, the present invention provides a device with a rotating system for refilling empty containers with fluids or fluid substances such as liquid detergents, lotions, creams, shampoos, granules, powders, gels, and different types of oils. The rotating system rotates on the target container to open the target container and thus initiate the flow of the liquid from the source bottle to the target bottle. Background Art

[0002] As is well known in the general consumer market, there are several types of containers for storing general fluids. Specifically, there are containers that typically exhibit luxurious features due to their aesthetic appeal and usually have aesthetic themes that are relatively difficult to manufacture. In addition, the containers are also typically made of materials such as glass or the like, which can further increase the cost of the containers. Moreover, the luxurious features of the containers increase the value of the contents, which are also usually expensive, and enhance the image and reputation of the product, like perfume bottles. Therefore, using refill containers that are of less value than the liquid product allows for the refilling and reuse of containers with luxurious features, which are generally considered non-disposable items due to their quality.

[0003] In addition, there are also such packages that have the potential for reuse and also maintain the value of the package, thus avoiding the discard of the primary packaging. For example, in the case of liquid soap, the liquid soap has a valuable package, which can usually be reused after the filler is filled through another plastic package of lower value; this even changes the purchasing concept in the consumer market because it allows for the reuse of durable packages with different characteristics such as durability and usefulness. More specifically, the refill has the shape of a sachet and has an extraction nozzle at one of the tops of the sachet, or instead of the extraction nozzle, there is only a perforation that must be cut to open the sachet and extract its contents. This causes several inconveniences, such as always having to carry scissors with you, and may cause accidental cutting and spillage of the liquid. The sachet also has no flow control, so part of the product may remain in it, and it does not have any easy closing component.

[0004] There is also a current focus on reusing materials to avoid using natural raw materials in the manufacture of general products. Therefore, there is a need for a way to reuse containers, specifically a liquid container that can be easily reused to store another liquid after the container has been completely emptied of its original liquid. Therefore, the usefulness of decanting a liquid from a relatively basic container into a more expensive container cannot be denied, or the usefulness of solving environmental problems, specifically when the refill can be recycled, or even the usefulness of solving economic problems cannot be denied.

[0005] Viscous liquid containers (such as shampoos and liquid detergents) typically have a body for storing the liquid, which has a threaded neck to which a liquid dispensing cap is attached. Therefore, a simple way to refill an empty container is to simply remove the top and manually decant the contents of the refill, as in the aforementioned example of liquid soap with a sachet refill. Such packaging may alternatively use a pump instead of a top.

[0006] However, this form of manual refilling has several drawbacks, such as removing the top from the container, as these tops are usually locked in a way that makes them very difficult to remove manually. In addition, the neck of the container usually also has a small size, and some manual skill or dexterity is required to transfer the liquid from the refill bottle to the target container. The common consequence of such a transfer method, apart from highly skilled personnel, is the loss of the product (usually an expensive product) contained in the refill, as well as the risk of soiling the user's clothes or hands. Due to the nature of viscous liquids (specifically cosmetic liquids), if the liquid spills, the place where it spills is impregnated with a persistent odor and consistency, which causes great inconvenience.

[0007] In this sense, the prior art provides some solutions to facilitate the transfer of the liquid so that the user does not have to transfer the liquid manually, such as, more specifically, a device in the form of a funnel, which is a substantially conical utensil capped by a tube and mainly used for pouring not only liquids but also powders or pasty substances into a container with a smaller opening.

[0008] Document JP2004306982 discloses an example of using a funnel to transfer a liquid, which describes a holding cylindrical portion of a refill funnel formed in a rectangular or cylindrical shape, the inner peripheral length of which is substantially equal to the inner peripheral length of the refill bag and the length of which is about 1 / 3 to 1 / 4 thereof, and a horizontal annular exhaust portion is provided in the mouth contact portion of the bottom portion of the funnel.

[0009] However, the use of a funnel still does not change the fact that the entire liquid transfer process is still carried out manually; therefore, the user may still spill the liquid during the transfer.

[0010] The prior art also provides for the use of more complex devices, as illustrated by document FR2867761, which discloses a device for refilling a container provided with a threaded neck, the device comprising: a) a first container intended to contain the product to be transferred into a second container; b) a mating member intended to form the connection between the first and second containers; c) a member for closing the second container; and d) a member for transferring the product contained in the first container into the second container. The device makes it possible to transfer from a full bottle (the refill) to an empty bottle to be filled, the empty bottle having the same volume as the refill.

[0011] Document EP2500277B1 discloses another example, which relates to a device for refilling a bottle with a liquid, the device comprising a refill containing the liquid and a decanting system selectively adapted to transfer the liquid from the refill to the bottle, the decanting system comprising: a first part fixed to the refill, which has a first liquid passage and a first air passage in communication with the refill; a second part, which is connected to the first part and is designed to be fixed to the bottle, the second part including a second liquid passage and a second air passage, the second air passage being designed to be in communication with the bottle, the first part and the second part being configured to move translationally together and to rotate freely between an open configuration and a closed configuration, in which open configuration the first liquid passage and the second liquid passage and the first air passage and the second air passage are aligned so as to provide a liquid passage and an air passage between the refill and the bottle, and in which closed configuration the first liquid passage and the second liquid passage and the first air passage and the second air passage are not aligned so as to prevent both liquid and air from passing through.

[0012] However, the devices mentioned in the two documents found in the prior art only allow the transfer of low-viscosity liquids; thus, they are only designed for cosmetic liquids such as perfumes and do not allow them to be used for more viscous or denser cosmetics such as shampoos and liquid soaps. Specifically, the system disclosed in document EP2500277B1 is designed for liquids such as perfumes, as stated in its specification.

[0013] In view of the above, the prior art would clearly benefit from the introduction of a device having a rotary system that allows an empty container to be refilled with said fluid (specifically such as liquid products like liquid detergents, lotions, creams, shampoos, gels, different types of oils, etc.) by transferring the fluid into the target container, and also having a rotary system for closing the system that also removes the device. Thus, the user does not need to perform any additional movement to open or close the device. Summary of the Invention

[0015] To solve the problems of the prior art, an object of the present invention is to provide a device with a rotation system, wherein the device is fixed in a refill container and must be screwed onto a target container during use.

[0016] Another object of the present invention is to provide the construction of the device such that it can transfer general fluids or fluid substances, such as granules or powders.

[0017] Another object of the present invention is to promote reuse and sustainability through a system with simple operation and usability.

[0018] Another object of the present invention is to provide an effective, clean, and easy-to-handle refilling experience for the user.

[0019] Finally, the object of the present invention is to provide a device with simple application and use, such that it encourages users to reuse the container and refill it with new types of fluids. Summary of the Invention

[0020] To achieve the above object, the present invention includes a new fluid transfer device, which provides an advantageous and effective way to refill a target container with general fluids, specifically liquid products (such as liquid detergents, lotions, creams, shampoos, gels, different types of oils), and wherein the device avoids all the problems and inconveniences of the prior art.

[0021] For this purpose, the device comprises:

[0022] - A first part, which comprises a fluid passage form;

[0023] - A second part, which comprises a means for opening and closing the fluid passage of the first part.

[0024] More specifically, the first part comprises a body having a cylindrical shape and a layered wall, and a base having an internal thread section. The base extends upward to a narrowing section that forms a cylindrical main nozzle, which in turn comprises an opening and an internal reservoir. In addition, the main nozzle is surrounded by a layered side wall, which is supported and formed by the base of the first part, more specifically at the beginning of the narrowing of the base.

[0025] The main nozzle further comprises a layered internal structure located at its mouth, which supports a closing element, which in turn comprises a larger-sized inlet in its lower part.

[0026] The second part includes a cylindrical nozzle having a circular opening in its upper part, said opening corresponding to the closing element of the first part. The nozzle is contoured (i.e., surrounded) by a cylindrical base which in turn includes threaded sections in its inner and outer parts.

[0027] In this way, the first and second parts of the device of the invention configure a rotating system by assembling the two parts, where the assembly is carried out through the second part to cover the upper part of the first part. Specifically, the nozzle of the second part completely covers the nozzle of the first part; and the threaded sections of the base of the second part are fixed to the side wall supported on the base of the first part.

[0028] Furthermore, in order to effect the correct transfer of the viscous liquid from the refill container to the target container, the first part is assembled to the refill container mouth through the threaded section of the base of the first part, and the second part is fixed to the target container mouth through the assembly of the inner threaded section of the base of the second part.

[0029] This establishes a rotating system that rotates on the target container, where the first and second parts perform an up and down movement and then open and start the flow of fluid towards the target bottle.

[0030] The dispensing of the fluid substance from the refill container into the target container can be achieved only by gravity, by pressurizing the refill container, or by a combination of gravity and pressurizing the refill container. It should be understood that the pressurization of the refill container can be carried out manually by the user of the invention or automatically by a machine that compresses the wall of the refill container or otherwise reduces the internal volume of the refill container. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Based on the following detailed description which will be made with reference to the accompanying drawings, the subject matter of the invention will be fully clear in its technical aspects, which drawings relate to:

[0032] - Figure 1 Showing an exploded perspective view of the fluid transfer device in order to illustrate the two parts included in the device of the invention;

[0033] - Figure 2 Showing a top view of the first part of the fluid transfer device;

[0034] - Figure 3 Showing a bottom perspective view of the first part of the fluid transfer device;

[0035] - Figure 4 Showing a top view of the second part of the fluid transfer device;

[0036] - Figure 5 Showing a bottom perspective view of the second part of the fluid transfer device;

[0037] - Figure 6 Shows a front cross-sectional view of a fluid transfer device in a closed configuration, where a first part is assembled to a second part;

[0038] - Figure 7 Shows a front cross-sectional view of a fluid transfer device in an open configuration, where a first part is assembled to a second part;

[0039] - Figure 8 Shows a front cross-sectional view of a transfer device in a closed configuration taken through an air passage and an exchange tube;

[0040] - Figure 9 Shows a front cross-sectional view of a transfer device in an open configuration taken through an air passage and an exchange tube;

[0041] - Figure 10 Shows a front cross-sectional view of a fluid transfer device in an open configuration and mounted on a partial portion of a refill container and a partial portion of a target container;

[0042] - Figure 11 Shows a front cross-sectional view of a fluid transfer device in a closed configuration, and Figure 11 Shows the engagement of a protrusion of the first part with an external threaded section of the second part;

[0043] - Figure 12 Shows a front cross-sectional view of a fluid transfer device in an open configuration, and Figure 11 Shows the engagement of a protrusion of the first part with an external threaded section of the second part; and

[0044] - Figure 13 Shows a top perspective view of a second part of a fluid transfer device. DETAILED DESCRIPTION

[0045] In accordance with the purposes mentioned and the figures presented, the present invention relates to a fluid transfer device, as exemplified by Figures 1 to 13 and the fluid transfer device includes a fluid transfer device (1) made of a thermoplastic material, and the fluid transfer device provides an advantageous and effective way to refill a target container with a general fluid (specifically such as liquid products like liquid detergents, lotions, creams, detergents, gels, different types of oils, etc.). Although the parts of the exemplified containers have the form of the neck of a rigid or semi-rigid bottle, it should be understood that the device (1) can be mounted on or used with other types of containers, such as flexible bags, containers, and other rigid or flexible structures. In the context of the present invention, when referring to a refill container or a target container, the term "container" may include flexible bags, containers, and other rigid or flexible structures, such as bottles.

[0046] In one aspect of the present invention, the device (1) of the present invention comprises:

[0047] - A first part (2), which includes a fluid passageway means;

[0048] - A second part (3), which includes means for opening and closing the fluid passage of the first part (2).

[0049] As illustrated by the present invention Figures 1 to 4 The first part (2) includes:

[0050] - A body (21), which has a cylindrical shape and a layered wall;

[0051] - A base (22), which includes a product structure (i.e., a support structure), a lower profile flap or a plug seal (21a) on its outer part, and an internal thread section (22a) or a snap-fit section (not illustrated);

[0052] - A main nozzle (4),

[0053] wherein the body (21) includes a side wall (23) supported on the base (22). The base (22) extends upward to a horizontal narrowing that supports the side wall (23) and configures a cylindrical main nozzle (4), which is profiled or surrounded by the layered side wall (23). In addition, the inner part of the base (22) also includes a geometry that narrows the opening of the inner region and is configured for the passage of liquid from the main nozzle (4).

[0054] In another alternative aspect of the present invention, the side wall (23) includes at least two hollow sections (23a) and at least two trapezoidal layered elements (24), one of the corners of which is rounded, wherein each layered element (24) is positioned close to each of the said hollow sections (23a), and the hollow section is configured with a rectangular protrusion (25) having a rounded corner, as Figure 1 and Figure 3 illustrated. When the device (1) is closed, the layered element (24) serves as a mechanical barrier to stop the movement between the first part (2) and the second part (3). The inventors have found that the layered element (24) prevents or minimizes the risk of failure of the device (1) due to excessive torque applied by the user of the device (1). See Figure 2 , it can be seen that the layered element (24) and the protrusion (25) are located at different angular positions relative to the central axis of the device (1). The base (22) also includes an annular sealing wall (26), which has a tapered upper end and is positioned around the main nozzle (4) and around the opening of the air passage and the exchange tube (5) (which can also be referred to as an exhaust pipe).

[0055] In another aspect of the present invention, the main nozzle (4) includes an orifice (41) and an internal region for fluid passage, which is configured by the side wall of the cylindrical body of the main nozzle (4). Additionally, as Figure 2 and Figure 3 illustrated, the main nozzle (4) includes an internal layered structure in its orifice that supports a closing element (42), wherein the internal structure does not block the orifice (41).

[0056] In another aspect of the present invention, the closing element (42) includes a larger diameter inlet in its lower part. Specifically, the closing element (42) does not completely block the orifice (41).

[0057] In another aspect of the present invention, in addition to the threaded section (22a), the internal part of the base (22) further includes a circular fitting for fixing any orifice of the container to the threaded section (22a), wherein the circular fitting narrows and configures the opening of the internal reservoir of the main nozzle (4), which is the internal region of the first part (2), more specifically the part above the threaded section, the air passage, and the exchange tube (5). As Figures 2 to 3 visible, the tube (5) has an elongated runway cross-sectional shape and is laterally spaced from the central axis of the device (1) towards the periphery of the first part (2). The terms such as axial or lateral used throughout the specification are with respect to the central axis of the device (1), which extends through the opening (32) and the geometric center of the main nozzle (4).

[0058] In another aspect of the present invention, the second part (3) includes:

[0059] - a body (30);

[0060] - a nozzle (31) having an opening (32) in its upper part;

[0061] - a base (33).

[0062] In addition, the opening (32) corresponds to the closing element (42) of the first part (2). Further, the nozzle (31) includes a cylindrical body having an upper part, the cylindrical body including a slightly protruding opening (32), and the nozzle (31) is surrounded by a cylindrical base (33) having a smaller height and a larger diameter. The base (33) includes an internal thread section (33a) and an external thread section (33b). More specifically, the external thread section (33b) extends upward to an upper profile narrowing section (34), which is also present in the internal thread section (33a) and configures an upper profile edge (35). In addition, the external thread section (33b) further includes at least two recesses (34a), which are configured to receive the protruding part (25) and correspond to the protruding part.

[0063] Specifically, the external thread section (33b) includes a construction form to allow the protruding part (25) to slide on the external thread section (33b), so as to allow the second part (3) to perform an upward (i.e., axial) movement. This upward movement of the second part (3) will open the main nozzle (4), and thus open the fluid passage from the device (1). The base (33) includes an annular sealing wall (36) having a tapered lower end surface, and the annular sealing wall is configured to seal against the annular sealing wall (26) of the first part (2) when the device (1) is in a closed, non-dispensing configuration. The contact of the annular sealing walls (26, 36) of both the first part (2) and the second part (3) also seals the opening of the air exchange tube (5) of the first part (2), where the device (1) is in a closed, non-dispensing configuration.

[0064] In a main aspect of the present invention, the device (1) configures a rotation system for safely and leaklessly transferring a fluid (specifically a liquid product) from a refill container (60) to a target container (50) through the assembly of the first part (2) and the second part (3), which is only visible in Figure 10 wherein the assembly is performed by covering the upper part of the first part (2) with the second part (3), specifically, such that the nozzle (31) completely covers the main nozzle (4), and the assembly is fixed by fixing the external thread section (33b) in the internal area defined by the side wall (23), such that the edge (35) is flush with the upper part of the side wall (23). Although the term "refill container" is used throughout the specification, it should be understood that this term includes any type of container for a fluid substance and does not necessarily have to be limited to the container itself for refill purposes, and this term includes any type of container for supplying or transferring a fluid substance to a target container.

[0065] More specifically, when the edge (35) is flush with the upper part of the side wall (23), this means that the rotation system of the device (1) is in a closed configuration, as Figure 2 illustrated.

[0066] After the first part (2) is assembled with the second part (3), the device (1) can be assembled to the mouth of the refill container (60) and the mouth of the target container (50). The refill container holds the liquid for transfer, and the target container will be filled with the liquid contained in the refill container (60). To this end, the neck (52) defining the mouth of the target container (50) is positioned upward, and then screwed onto the internal thread section (33a) of the second part (3) via the external thread (54), so that the opening of the nozzle (31) and the main nozzle (4) are positioned downward. After being attached to the mouth of the target container (50) in this way, the neck (62) defining the mouth of the refill container (60) is screwed onto the thread section (22a) via the external thread (64), or if provided with an alternative connecting member, a snap fit is made, so that the opening of the mouth of the refill container (60) points downward and is fixed in the circular fitting in a manner to avoid possible leakage.

[0067] Thus, the refill container (60) is arranged above the target container (50), and the mouths of the two containers (50, 60) are interconnected by the device (1) which remains closed. In the closed configuration of the device (1), the edge (35) is flush with the upper part of the side wall (23), and the opening (32) is completely closed by the closing element (42).

[0068] To open the device (1), the second part (3) must be partially unscrewed from the first part (2) via a rotation system or component, so that the opening (32) is above the closing element (42), and the edge (35) is also above the upper part of the side wall (23) (i.e., axially extended). In this way, due to the arrangement of the above containers, in the internal reservoir of the main nozzle (4), the opening (32) freely allows the stored liquid to pass through. In addition, due to the sliding of the above-mentioned protrusion (25) in the cam mechanism in the external thread section (33b), this movement is beneficial.

[0069] In this way, to perform the transfer of fluid from the refill container to the target container, the first part (2) is assembled on the mouth of the refill container, and the second part (3) is fixed on the mouth of the target container, where the user rotates the device (1), specifically rotates the second part (3) on the target container (50), and then opens and starts the flow of fluid into the target container (50).

[0070] In this way, the rotation system is configured by fixing the first part (2) to the second part (3), wherein the system is opened or closed by a relative rotational movement between the second part (3) and the first part (2), and once the assembly has been fully screwed onto the target container (50), said relative movement between the second part (3) and the first part (2) begins. This relative movement will be an axial upward movement for opening the device (1) and an axial downward movement for closing the device (1).

[0071] In a main aspect of the invention, the relative movement between the second part (3) and the first part (2) only slightly closes the device (1), wherein the first part (2) and the second part (3) are configured such that said relative movement only begins when the device (1) has been fully screwed onto the target container (50).

[0072] Furthermore, the device (1) is configured such that the friction between the first part (2) and the second part (3) is selected such that when the device (1) is coupled to the target container (50), the opening for transfer only occurs after it has been fully screwed into said target container (50). More specifically, when the device is screwed onto the target container (50), the friction between the first part (2) and the second part (3) must be greater than the friction between the second part (3) and the target container; and when it is unscrewed, the friction between the second part (3) and the target container (50) must be less than the friction between the first part (2) and the second part (3).

[0073] In addition, during separation, the unscrewing in the target container (50) only occurs after closing the device (1) for transfer. The static friction between the device (1) and the neck of the target container (50) is greater than the static and dynamic friction between the first part (2) and the second part (3), which makes it easier for the user to overcome the static friction between the device (1) and the neck of the target container (50) once the device (1) is fully closed. This promotes intuitive usability and does not require the user to follow non-intuitive steps for refilling.

[0074] In another aspect of the present invention, the device (1) includes a hydraulic braking mechanism or function that automatically stops the passage of fluid when the target container (50) is full. More specifically, after the target container (50) is completely filled such that the liquid level in the target container (50) reaches the nozzle (4), the air flow between the target container (50) and the refill container (60) is interrupted, and thus the air passage through the tube (5) is interrupted, which causes the device (1) to automatically interrupt the liquid flow between the containers (50, 60), even if the target container (50) still contains liquid, and the user does not need to close the device (1). In other words, the interruption causes no fluid product to be dispensed from the refill container (60) and no air to be sucked or drawn into the refill container (60) through the tube (5). The inventors have found that when the liquid column inside the device (1) contacts the dispensed liquid in the target container (50), the small gap or space between the outer surface of the nozzle (4) and the inner diameter of the neck (52) of the target container (50) acts as a sealed container in an equilibrium state.

[0075] The device (1) allows for perfect transfer of liquids of different viscosities, such as:

[0076] - Only under the action of gravity, the liquid descends through the main nozzle (4), and air rises through the tube

[0077] (5). This embodiment is carried out with a low-viscosity liquid.

[0078] - As the user squeezes (elastically deforms) the refill container (50), the liquid drips through the main nozzle (4) more quickly. After that, as the refill container (60) returns to its original shape, the passage of the liquid through the main nozzle (4) is interrupted, and at the same time, air is drawn through the tube (5). This embodiment is carried out with a low-viscosity liquid.

[0079] - As the user squeezes (elastically deforms) the refill container (60), the liquid drips through the main nozzle (4). After that, as the refill container (60) returns to its original shape, the liquid passage is interrupted, and at the same time, air is drawn by the main nozzle (4) itself. This embodiment is carried out with medium / high-viscosity liquids.

[0080] In addition, the nozzle (31) includes at least two lateral longitudinal grooves (6) in its configuration, which are used for the air passage if the diameters of the refill container (60) and the target container (50) are close to each other.

[0081] For the case where the device (1) provides a tube (5) for the air passage, the passage can continue to the bottom of the refill container (60) by extending the tube (5) or by coupling a pump tube (i.e., dipping tube) to the tube (5). This configuration facilitates the entry of air into the refill container (60) because the air does not need to break the surface tension of the liquid present in the refill to form bubbles that will rise, where the pump tube extends and brings air to the end of the target container (50) in order to avoid problems with the surface tension of the liquid.

[0082] In addition, the tube (5) performs gas compensation in a low-viscosity liquid, where the liquid enters through the main inlet and air is exchanged through the tube (5). In addition, the hydraulic brake is caused by the liquid reaching the desired level and no longer being able to descend.

[0083] In an alternative aspect of the invention, the tube (5) can be missing or not used in the device (1). In this case, the liquid travels downward and air rises through the main nozzle (4), in the air passage area and the opening (32). The squeezing movement causes the liquid to travel downward and the air to travel upward.

[0084] As pointed out in the device (1) disclosed herein, it advantageously provides a way to fill the target container (50) with liquid from the refill container (60) for fluids with different viscosities, having an intuitive usability for the user but not being prone to spillage, which improves the user experience when using refills, thus promoting such practices.

[0085] It should be understood that this specification does not limit the present application to the details described herein, and the invention is applicable to other embodiments and can be practiced or carried out in various ways within the scope of the claims. Although specific terms have been used, such terms should be interpreted in a general and descriptive sense and not for the purpose of limitation.

Claims

1. A fluid transfer device, the fluid transfer device presenting a fluid transfer device (1), the fluid transfer device comprising a first part (2) for connection to an opening of a refill container (60) and a second part (3) for connection to an opening of a target container (50), characterized in that, The first part (2) includes a main nozzle (4) and an air passage and an exchange tube (5), wherein the second part (3) includes a nozzle (31), and the device (1) includes a rotating system for closing or opening a fluid passage, the rotating system being configured by fixing the second part (3) to the first part (2), wherein the system performs a relative up-and-down rotational movement between the second part (3) and the first part (2), and the relative movement between the second part (3) and the first part (2) only starts when the device (1) is fully screwed onto the target container (50).

2. A fluid transfer device, which proposes a fluid transfer device (1) comprising a first part (2) for connection to an opening of a refill container (60) and a second part (3) for connection to an opening of a target container (50), characterized in that, The first part (2) includes a main nozzle (4) having a mouth (41), the mouth having a first diameter that supports a closing element (42), the closing element having a second diameter smaller than the first diameter and radially extending outwardly beyond the mouth (41), wherein the second part (3) includes a nozzle (31), and the device (1) includes a rotating system for closing or opening a fluid passage, the rotating system being configured by fixing the second part (3) to the first part (2), wherein the system performs a relative up-and-down rotational movement between the second part (3) and the first part (2), and the relative movement between the second part (3) and the first part (2) only starts when the device (1) is fully screwed onto the target container (50).

3. A fluid transfer device, which provides a fluid transfer device (1) including a first part (2) for connecting to an opening of a refill container (60) and a second part (3) for connecting to an opening of a target container (50), characterized in that, The first part (2) includes a main nozzle (4) connected to a base (22), the base having at least one layered element (24) extending axially outwardly from the base, and the first part (2) having a side wall (23) extending from the base (22) and having at least one projection (25) extending laterally inwardly from the side wall, wherein the second part (3) includes a nozzle (31) and a base (33) surrounding the nozzle (31), the second part (3) including at least one recess (34a) in the base (33) for receiving the at least one projection (25), and the at least one layered element (24) being located laterally inward of the base (33), and the device (1) includes a rotating system for closing or opening a fluid passage, the rotating system being configured by fixing the second part (3) to the first part (2), wherein the system performs a relative up-and-down rotational movement between the second part (3) and the first part (2), and the relative movement between the second part (3) and the first part (2) only starts when the device (1) is fully screwed onto the target container (50).

4. The device (1) according to any one of the preceding claims, characterized in that, The first part (2) includes: - a body (21) having a cylindrical shape and a layered wall; - a base (22) including a product structure, a lower profile flap (21a), and an internal thread section (22a) or a snap-fit section on an outer portion of the base; The body (21) includes side walls (23) supported on the base (22), the base (22) extending upward to a horizontal narrowing that supports the side walls (23) and also configures a cylindrical main nozzle (4), the cylindrical main nozzle being contoured by the layered side walls (23), the layered side walls including at least two hollow sections (23a) and at least two layered elements (24) and having a rectangular shape, one of the corners of the at least two layered elements being rounded, each layered element (24) closely fitting each of the hollow sections (23a), the hollow sections configuring rectangular and rounded corner projections (25).

5. The device (1) according to any one of the preceding claims, characterized in that, The main nozzle (4) includes an orifice (41) and an internal area for the passage of liquid, the internal area being configured by the side walls of its cylindrical body, wherein the main nozzle (4) includes a layered internal structure in the orifice of the main nozzle that supports a closing element (42), wherein the internal structure does not block the orifice (41), and the closing element (42) includes a larger diameter inlet in the lower part of the closing element.

6. The device (1) according to any one of the preceding claims, characterized in that The internal part of the base (22) also includes a geometry that narrows the opening of the internal area and is configured to allow the passage of liquid from the main nozzle (4).

7. The device (1) according to any one of the preceding claims, characterized in that, The second part (3) includes: - a body (30); - a cylindrical nozzle (31) having an opening (32); - a base (33); wherein the opening (32) corresponds to the closing element (42) of the first part (2), wherein the nozzle (31) is contoured by the cylindrical base (33), the base (33) including an internal threaded section (33a) and an external threaded section (33b), the internal threaded section allowing the device (1) to be coupled in the target container (50), the external threaded section extending upward to an upper contour narrowing (34) that configures an upper contour edge (35), and the external threaded section (33b) also including at least two recesses (34a) that correspond to the projections (25).

8. The device (1) according to any one of the preceding claims, characterized in that, When the device (1) is screwed onto the target container (50), the friction between the first part (2) and the second part (3) must be greater than the friction between the second part (3) and the target container (50); and when the device (1) is unscrewed, the friction between the second part (3) and the target container (50) must be greater than the friction between the first part (2) and the second part (3).

9. The device (1) according to any one of the preceding claims, characterized in that, The nozzle (31) includes at least two lateral longitudinal grooves (6) for an air passage.

10. The device (1) according to any one of the preceding claims, characterized in that, The device (1) includes a hydraulic braking configuration that automatically stops the passage of fluid when the target container (50) is full.

11. The device (1) according to claim 1, characterized in that, The tube (5) for the air passage can be continued to the bottom of the refill container (60) by extending the tube (5) or by coupling a pump tube to the tube (5).

12. The device (1) according to claim 1, characterized in that, The tube (5) for the air passage is laterally spaced from the central axis of the device (1) and has an elongated cross-sectional shape in a plane orthogonal to the central axis.

13. The device (1) according to any one of the preceding claims, characterized in that, The device (1) is combined with a container (50, 60) of a fluid substance.

14. The device (1) according to any one of the preceding claims, characterized in that, The first part (2) includes an annular sealing wall (26), and the second part (3) includes an annular sealing wall (36), wherein in the closed configuration of the device (1), the annular sealing walls (26, 36) are engaged to seal the air passage and the exchange tube (5) of the first part (2).

15. The device (1) according to any one of the preceding claims, characterized in that The first part (2) includes a pair of opposing layered elements (24) extending axially outward from the first part, and the first part (2) includes a pair of opposing protrusions (25) extending laterally inward from the first part, wherein the layered elements (24) and the protrusions (25) are located at different angular positions relative to the central axis of the device (1).

16. A method of using a fluid transfer device (1) according to any one of the preceding claims, characterized in that, The method includes the following steps: Connecting the first part (2) to the opening of the refill container (60); Connecting the second part (3) to the opening of the target container (50), wherein the main nozzle (4) of the first part (2) and the nozzle (31) of the second part (3) are located within the opening of the target container (50); and Rotating the second part (3) relative to the first part (2) to achieve axial movement therebetween, thereby opening the fluid passage of the device (1) to allow the fluid substance to be dispensed from the refill container (60) into the target container (50).

17. The method of using the fluid transfer device (1) according to claim 16, characterized in that, The method includes an additional step: Dispensing the fluid substance from the refill container (60) into the target container (50) only by gravity, by pressurizing the refill container (60), or by a combination of gravity and pressurizing the refill container (60).

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