Dispenser for dispensing a fluid

Abstract

A dispenser (1) made of plastic material for dispensing a fluid contained in a bottle is described, comprising: an annular nut (2) having a cylindrical duct for sucking the fluid; an accordion-like deformable element comprising a lateral wall (10) defining a metering chamber (10a); a ring (12) configured to identify, together with the annular nut (2), a locking system to define an operating configuration and a non-operating configuration of the dispenser (1); a dispensing head (16) pressable by a user and equipped with a collection chamber (16a) designed to collect the fluid that flows from the metering chamber (10a) through a central opening (12a) of the ring (12); first and second shut-off elements configured to define, respectively, a check valve at the inlet and a check valve at the outlet of the metering chamber (10a); a locking element that interferes with at least one between the first and second shut-off elements to lock it in a fixed position, blocking in a stable manner the suction duct and / or the central opening at least in the dispensing configuration.

Description

Technical Field

[0001] This invention relates to a dispenser for dispensing fluid. In other words, this invention relates to a dispensing device suitable for the neck of a bottle for dispensing fluid contained in the bottle. Background Technology

[0002] There are various types of existing technology distributors, ranging from complex to simple.

[0003] The downside is that these devices are often made of a different material than the bottles they are attached to, and less careful users may not separate the dispenser from the bottle when disposing of waste. This results in low recycling efficiency for both components, especially as they require a long sorting time at the waste sorting area.

[0004] Generally speaking, the use of dispensers is known, which are equipped with a simple structure and therefore have a reduced number of parts, thus enabling environmentally sustainable products equipped with homogeneous materials to simplify recycling.

[0005] Among these, the distributor is well-known, based on an accordion-shaped deformable element that acts as a spring and defines the dispensing chamber for the outflowing fluid. These elements can also integrate check valves, which regulate the feed and discharge of fluid from the metering chamber by appropriately opening a specific pressure differential, with the advantage of minimizing the number of components and corresponding materials used.

[0006] Disadvantageously, dispensers with this simplified structure lack a compensation system and therefore cannot top up the volume of fluid extracted from the bottle with air, as they are typically used in systems that do not require a compensation system.

[0007] Most importantly, another drawback of these dispensers is that some components, especially those integrating various functions, have poor versatility in use, and if they are designed to optimize performance based on the characteristics of the specific fluid to be dispensed, they often cannot guarantee adequate operation when using dispensers with fluids that have different characteristics.

[0008] Furthermore, existing distributors require certain construction specifications to allow for safe transport, a feature that is disadvantageously lacking in the simplified structure described above. Summary of the Invention

[0009] Therefore, the technical objective of this invention is to provide a distributor for distributing fluids that overcomes the shortcomings of the prior art.

[0010] Therefore, the objective of this invention is to provide a dispenser for distributing fluids, which has a simplified structure that can be used in systems where a compensation system is required to replenish the volume of the extracted fluid.

[0011] Another objective of the present invention is to provide a dispenser for distributing fluids that has a certain degree of robustness, enabling it to dispense fluids without specific protective devices.

[0012] Another objective of the present invention is to provide a dispenser for distributing fluids, having features such as allowing safe recovery.

[0013] Another objective of the present invention is to provide a dispenser for distributing fluids that allows for versatility in use with any type of fluid.

[0014] The technical objectives and specified goals described are essentially achieved through a distributor used to distribute fluid.

[0015] Specifically, the designated technical purpose and the designated objective are essentially achieved through a dispenser made of plastic material for distributing fluid.

[0016] The dispenser includes an annular nut that can be screwed onto the neck of a bottle and has a cylindrical element that defines a conduit for drawing fluid from the bottle, wherein the cylindrical element has a neck.

[0017] In addition, the ring nut has a series of holes for positioning around the conduit, and an inner cylindrical wall equipped with a partial groove.

[0018] The dispenser also includes an accordion-shaped deformable element that defines a return spring for the dispenser and includes a cylindrical lower protrusion equipped with a corresponding recess and a sidewall defining the metering chamber of the dispenser.

[0019] The distributor includes a ring positioned on a ring nut and designed to define a locking system together with the ring nut. The locking system defines a non-operating configuration and an operating configuration of the distributor. In the non-operating configuration, the distributor cannot be actuated, and in the operating configuration, the distributor can be actuated by means of the reciprocating rotation of the ring and the ring nut.

[0020] The ring is also connected to the upper part of the accordion-shaped deformable element, so that during reciprocating rotation, the accordion-shaped deformable element is pulled, thereby aligning or misaligning the grooves of the cylindrical wall of the ring nut and the grooves of the accordion-shaped deformable element, thereby opening or closing a channel, through which external air can enter the bottle through the channel and through a separate and different conduit from the conduit used for distributing fluid, to compensate for the reduction in the volume of liquid in the bottle as the bottle is gradually emptied.

[0021] The dispenser also includes a dispensing head that can be pressed by the user when the dispenser is in operating configuration. The dispensing head is operatively connected to the ring and equipped with a channel designed to collect fluid from the metering chamber of the accordion-shaped deformable element at the outlet through a central opening of the ring, so as to dispense it through the outlet channel.

[0022] The dispenser includes a first shut-off element configured to rest on the neck of a cylindrical element of an annular nut and rise under negative pressure in the metering chamber, thereby forming a fluid check valve together with the neck at the fluid inlet in the dispensing chamber. Furthermore, the dispenser includes a second shut-off element integral with the dispensing head, movably housed in a central opening of the annulus to rise under positive pressure in the metering chamber after the dispensing head is actuated, thereby defining a check valve that operates when fluid is delivered from the metering chamber to the collection chamber of the dispensing head.

[0023] Finally, the dispenser includes a sleeve element coaxial with the cylindrical element of the annular nut, which interferes with at least one of the first and second cut-off elements in the dispensing configuration at least before the first pressure of the dispensing head, to lock it in a fixed position that allows stable closure of the suction conduit and / or the central opening.

[0024] Other features and advantages of the invention will become more apparent in the following non-limiting description of a non-exclusive embodiment of a dispenser for distributing fluid. Attached Figure Description

[0025] The following description refers to the accompanying drawings, which are for illustrative purposes only and do not limit the scope of the invention. In the drawings:

[0026] - Figure 1 This is a schematic exterior view of the dispenser according to the present invention;

[0027] - Figure 2 This is a cross-sectional schematic diagram of an embodiment of the dispenser;

[0028] - Figures 3a to 8 yes Figure 2 A schematic diagram of the dispenser components;

[0029] - Figure 9 yes Figure 2A schematic cross-sectional view of the distribution structure of the distributor;

[0030] - Figure 10a and Figure 10b This is a schematic diagram of another embodiment of the dispenser according to the present invention;

[0031] - Figure 11a and Figure 11b This is a schematic diagram of another embodiment of the dispenser according to the present invention. Detailed Implementation

[0032] Referring to the accompanying drawings, reference numeral 1 generally indicates a distributor for distributing fluid, which will be referred to as distributor 1 below for the sake of simplicity.

[0033] Dispenser 1 is made of plastic material to simplify recycling. Preferably, dispenser 1 is made of polyethylene. Even more preferably, the plastic material is a bioplastic produced from a non-fossil source. In other words, the components used to make dispenser 1 are sized to be made of a single family of plastics (e.g., polyethylene), so that it can also be recycled along with the bottle, which is also made of polyethylene when opaque. Advantageously, the aforementioned bioplastic (made from a non-fossil source) is present in the polyethylene family, which is particularly recyclable and / or biodegradable.

[0034] Dispenser 1 includes an annular nut 2, which can be screwed onto the neck of the bottle (not shown).

[0035] Ring nut 2 (e.g.) Figure 3a and Figure 3b The attached figure shows a fastening system 2a equipped with a preferred threaded connection. The figure illustrates a fastening system 2a formed as a cylindrical body (defining the body of the annular nut 2) with internal threads designed to allow screwing onto the neck of the bottle. The threaded fastening system 2a can be replaced by other connection systems (not shown) for bottles.

[0036] The annular nut 2 has an internally shaped cylindrical element 3a that forms a conduit 3 for drawing fluid. The conduit 3 is positioned in the central portion of the annular nut 2 and is designed to allow connection of a suction device (not shown) to draw product from a bottle.

[0037] As shown in the attached figure, the cylindrical element 3a has a neck 3b.

[0038] The neck 3b partially obstructs the catheter 3, which preferably has a substantially annular shape.

[0039] The neck 3b is designed to interface with the first cutoff element 20. The first cutoff element 20 can preferably be made into a substantially spherical shape.

[0040] Specifically, the first shut-off element 20 is configured to be positioned on the neck 3b and to rise from the neck 3b so that it, together with the neck, forms a fluid check valve, as will be described in more detail below. In other words, the first shut-off element 20 can be made into any shape useful for manufacturing the aforementioned check valve.

[0041] The annular nut 2 also includes a series of holes 4 positioned around the conduit 3 (i.e., around the cylindrical element 3a). The holes 4 are designed to allow compensating air to pass through, as described in detail below.

[0042] The annular nut 2 also includes a cylindrical inner wall 5 coaxial with the cylindrical element 3a (i.e., the conduit 3). In other words, the cylindrical wall 5 defines the portion of the annular nut 2 having the conduit 3 and the hole 4. Preferably, as shown in the figures, the conduit 3, the hole 4, and the cylindrical wall 5 are coaxial with each other. More specifically, the hole 4 is distributed on the periphery of the conduit 3, and the cylindrical wall 5 surrounds and includes the conduit 3 (i.e., the cylindrical element 3a) and the hole 4. The element just described is positioned inside the wall of the body of the annular nut 2 (which, as described above, has a generally cylindrical shape).

[0043] The cylindrical wall 5 is also equipped with a portion of the groove 5a, the function of which is described in detail below.

[0044] Finally, the annular nut 2 is equipped with a flat annular portion 6, which connects the cylindrical wall 5 to the outer wall of the body of the annular nut 2 equipped with the fastening system 2a. The flat annular portion 6 is designed to accommodate a sealing washer (not shown).

[0045] exist Figure 2 In the illustrated embodiment, reference Figures 3a to 8 The dispenser 1 also includes a collar 17 (such as...) Figure 8 As shown, the collar 17 is connected to the annular nut 2 to transmit rotational motion. The collar 17 and the annular nut 2 are interconnected by mutually mating portions 18a and 18b. Portions 18a and 18b have a main axial extension.

[0046] The collar 17 and the annular nut 2 are designed to limit the end of the travel of the distribution head 16. The collar 17 is also equipped with a relative undercut 17a (defined in the lower portion of the collar 17), which is designed to improve the connection between the collar 17 and the annular nut 2.

[0047] According to an embodiment not shown, dispenser 1 may not be equipped with collar 17.

[0048] Distributor 1 is also equipped with accordion-shaped deformable element 7 (in Figure 4a and Figure 4b (As shown in the figure), which defines the return spring of distributor 1.

[0049] The accordion-shaped deformable element 7 includes a lower cylindrical protrusion 7a equipped with corresponding partial grooves 7b. The partial grooves 7b of the accordion-shaped deformable element 7 correspond to the same number of partial grooves 5a of the annular nut 2. Thus, in the operating configuration of the dispenser 1 (i.e., a configuration designed to allow actuation of the dispenser and subsequent fluid dispensing), the partial grooves 5a and 7b are stacked and define a passage for the passage of compensating air. On the other hand, when the dispenser is in a non-operating configuration where actuation cannot be performed, the partial grooves 5a and 7b are offset to interrupt the passage and prevent some fluid from escaping from the inside of the bottle through the air inlet conduit.

[0050] The accordion-shaped deformable element 7 is also equipped with a sidewall 10, which defines the metering cavity 10a of the dispenser 1. The sidewall 10 constitutes a deformable element designed to define the return spring of the dispenser 1.

[0051] In use, the pressure within the metering chamber 10a allows control of the first cutoff element 20, particularly its movement.

[0052] More specifically, the first cutoff element 20 is configured to be positioned on the neck 3b and rise under negative pressure in the metering chamber 10a, thereby allowing fluid to be extracted from the bottle.

[0053] Furthermore, when the first shut-off element 20 is close to the neck 3b, it blocks the conduit 3, preventing liquid from returning from the metering chamber 10a to the bottle.

[0054] Thus, the shut-off element 20 and the neck 3b together form a check valve for the fluid at the feed inlet of the metering chamber 10a.

[0055] Therefore, the first shut-off element 20 can be made in any shape that allows the neck 3b to be blocked, thereby allowing the aforementioned check valve to open and close according to the pressure applied to the first shut-off element 20. For example, in Figure 2 In one embodiment, the shape is the substantially spherical shape described above.

[0056] Accordion-shaped deformable element 7 has a configuration for connection to ring 12 (in Figure 5a and Figure 5b The upper part 11 (shown in the image).

[0057] Ring 12 is located on ring nut 2 and is configured to define a locking system using ring nut 2, which is designed to define the operational and non-operational configurations of distributor 1.

[0058] The term "operating configuration" refers to a configuration in which dispenser 1 can be actuated and is capable of dispensing fluid drawn from the bottle.

[0059] The term "non-operational configuration" refers to a configuration in which distributor 1 cannot be actuated and therefore cannot dispense fluid.

[0060] In particular, the ring 12 can define the two structures described above by means of the reciprocating rotation between the ring 12 and the annular nut 2.

[0061] Regarding the locking system, it includes an inner axial rib 13 positioned in the upper portion of the annular nut 2 and an outer radial extension 14 of the ring 12. The outer radial extension 14 is located in the lower portion of the ring 12 near the annular nut 2. Thus, in the non-operating configuration of the distributor 1, the outer radial extension 14 rests on the inner axial rib 13 to prevent the distributor 1 from operating.

[0062] The inner axial ribs 13 are distributed to define channels 13a that alternate with the inner axial ribs 13. The channels 13a are sized to allow the outer radial extension 14 of the ring 12 to slide.

[0063] In the accompanying drawings, the annular nut 2 is equipped with four inner axial ribs 13 and four channels 13a, and the ring 12 is equipped with four outer radial extensions 14. In other words, a predetermined number of inner axial ribs 13 correspond to an equal number of outer radial extensions 14 and channels 13a to ensure proper operation of the locking system, thereby actuating (or not actuating) the distributor 1.

[0064] Ring 12 hooks onto the upper portion 11 of accordion-shaped deformable element 7. The upper portion 11 of accordion-shaped deformable element 7 is equipped with lateral grooves 11b. The grooves 11b are located on the outer portion of accordion-shaped deformable element 7 (where "outer" means they do not face the metering chamber 10a) and are designed to allow the upper portion to connect with ring 12. In this way, rotating ring 12 allows rotational motion to be transmitted to accordion-shaped deformable element 7. Specifically, ring 12 is equipped with suitable ribs 12d designed to insert into the lateral grooves 11b in accordion-shaped deformable element 7 to allow the accordion-shaped deformable element 7 to be pulled during rotation.

[0065] In this way, the accordion-shaped deformable element 7 can be pulled during reciprocating rotation, so that a portion of the groove 5a of the cylindrical wall 5 of the annular nut 2 and a portion of the groove 7b of the accordion-shaped deformable element 7 are aligned or misaligned.

[0066] Thus, when the distributor 1 is in the operating configuration, the recesses 5a and 7b define a channel for compensating for air passage, which, together with the hole 4 of the annular nut 2, defines the flow of air to achieve compensation.

[0067] On the other hand, when the dispenser 1 is in a non-operating configuration, the recesses 5a and 7b are not side by side and do not define a channel for compensating for air passage.

[0068] Ring 12 is operably connected to dispensing head 16 (e.g. Figure 7 As shown, when the dispenser 1 is in the operating configuration, the user can press the dispenser head 16.

[0069] When the dispenser 1 is in the operating configuration, the actuation of the dispensing head 16 is allowed due to the fact that the outer radial extension 14 of the ring 12 can slide within the channel 13a of the annular nut 2.

[0070] On the other hand, in the non-operational configuration, the outer radial extension 14 rests on the inner axial rib 13 to prevent actuation of the dispensing head 16.

[0071] Therefore, the distributor 1 can be controlled by the user to allow the distribution head 16 to use an operational configuration and a non-operational configuration.

[0072] The term "operating configuration" refers to the configuration of the dispensing head 16 when the dispenser 1 is in the operating configuration, wherein it is pressed and subsequently moved from an elevated position to a lowered position relative to the bottle, thereby dispensing fluid by the dispenser 1.

[0073] Furthermore, the term "non-operating configuration" refers to the configuration of the dispensing head 16 when the dispenser 1 is simultaneously in operating and non-operating configurations, wherein the dispensing head remains in an elevated position relative to the bottle (in other words, the dispensing head 16 is not pressed and the fluid is not dispensed).

[0074] Specifically, the dispensing head 16 is equipped with a collection chamber 16a, which is designed to collect fluid flowing out of the metering chamber 10a through the central opening 12a of the accordion-shaped deformable element 7. The central opening 12a is positioned to connect the metering chamber 10a and the collection chamber 16a.

[0075] The central opening 12a is configured together with the second shut-off element 21 to define another check valve that operates when fluid is delivered from the metering chamber 10a to the collecting chamber 16a.

[0076] In other words, when the dispenser 1 is in the operating configuration, the delivery valve is configured to open when the pressure in the metering chamber 10a is greater than a predetermined threshold, which is due to the thrust applied by the user to the dispensing head 16 (therefore in the operating condition), while on the other hand, it remains closed in other conditions.

[0077] More specifically, the second cutoff element 21 (e.g. Figure 6 , 10b (As shown in 11b) It is integral with the dispensing head 16 and is movably accommodated in the central opening 12a of the ring 12.

[0078] As shown in the attached figure, the second cutoff element 21 has essentially three parts.

[0079] Specifically, it has a preferred annular anchoring portion 21a, which is designed to be stably received in the receiving portion of the dispensing head 16 so that the second cut-off element 21 is integral with the dispensing head 16.

[0080] In addition, the second shut-off element 21 has a sealing portion 21b, which has a substantially elongated shape and is designed to block the central opening 12a, forming a closed configuration of the delivery valve.

[0081] The second shut-off element 21 also has a connecting portion 21c that connects the sealing portion 21b to the anchoring portion 21a and is configured to allow the sealing portion 21b to move relative to the anchoring portion 21a by elastic deformation, thereby opening the delivery valve when the pressure in the metering chamber 10a is greater than a predetermined threshold.

[0082] In other words, if the dispensing head 16 is operated, the second shut-off element 21 will move together with the dispensing head 16, thereby causing the pressure in the metering chamber 10a to allow the sealing portion 21b of the shut-off element 21 to rise in opposition to the downward movement of the shut-off element 21, thus allowing the delivery valve to fully open. This movement is permitted by the elastic properties of the connecting portion 21c, which, after the aforementioned pressure, allows the sealing portion 21b adapted to allow fluid passage.

[0083] Conversely, under other conditions, namely when the dispensing head 16 is released after operation or when it is in a raised, stationary state, the second shut-off element 21, in particular the sealing portion 21b, rests against the central opening 12a, adheres to it, and blocks it, thereby preventing backflow of liquid during the release of the dispensing head and also preventing accidental leakage of liquid when the dispenser is not in use.

[0084] More specifically, in the illustrated configuration, the sealing portion 21b preferably has a substantially conical lower portion 21x, the dimensions of which are adapted to block the also conical upper portion 12x of the central opening 12a when the sealing portion 21b is in the lowered position. On the other hand, when the sealing portion 21b is in the raised position, due to the pressure of the liquid, the conical lower portion 21x disengages from the upper portion 12x of the central opening 12a, allowing liquid to pass through.

[0085] Structurally, the connecting portion 21c includes a plurality of threaded elements or tabs that connect the anchoring portion 21a to the sealing portion 21b.

[0086] Threaded elements or tabs are spaced apart to allow fluid to pass through.

[0087] By collecting fluid through the collection chamber 16b, the distributor 1 (i.e., the dispensing head 16) is able to dispense fluid through the fluid outlet channel 16c. The outlet channel 16c is formed in the form of a nozzle 16d. Preferably, the nozzle 16d is a flexible nozzle designed to withstand breakage or removal of the dispensing head 16 due to impact or other types of stress.

[0088] The dispensing head 16 is also equipped with an inner cylindrical protrusion 16a, to which the ring 12 is connected by means of the second undercut portion 15b of the ring 12.

[0089] Preferably, the anchoring portion 21a of the second stop element 21 is connected to the inner wall of the cylindrical protrusion 16b of the dispensing head 16. In other words, the second stop element 21 is preferably integral with the inner cylindrical protrusion 16b of the dispensing head 16.

[0090] Preferably, the dispensing head 16 can rotate relative to the ring 12 without pulling the ring 12 during rotation. Other configurations are also possible, in which the dispensing head 16 is fixed relative to the ring 12.

[0091] The dispensing head 16 is also equipped with a sealing wall 16e, which is designed to seal the dispensing head 16, keeping the two parts stably connected, further reducing the risk of accidental removal and making the dispenser 1 more structurally robust.

[0092] In use, actuation of the dispensing head 16 causes deformation of the accordion-shaped deformable element 7, resulting in an increase in pressure inside the metering chamber 10a (due to volume reduction), which determines the fluid dispensing. In this context, partial recesses 5a and 7b, as well as the remaining channels described above, allow selective passage of air from the outside towards the inside of the bottle.

[0093] In other words, the specific structural shape of the accordion-shaped deformable element 7 and the annular nut 2 ensures that once the dispenser 1 has been moved to the operating configuration, a conduit is formed for compensating for air, which can pass through the inside of the bottle to replenish the amount of fluid exiting the bottle after the dispenser 1 has been operated. Specifically, the conduit is located outside the metering chamber 10a and is defined between the wall 10 of the accordion-shaped deformable element 7 and the annular nut 2 and ring 12.

[0094] Therefore, the path of the airflow is defined between the collar 17 and the gap between the ring 12 and the ring 12, and between the collar 17 and the ring 12, and between the collar 17 and the ring 12, passing through the outside of the accordion-shaped deformable element 7, and through the channel defined by the partial grooves 5a and 7b for compensating for the passage of air.

[0095] To improve the airtight seal of distributor 1, that is, to ensure that fluid does not pass through conduit 3 and / or central opening 12a when not needed, thereby preventing it from being dispensed by outlet channel 16c when not needed, distributor 1 is equipped with sleeve element 22.

[0096] The sleeve element 22 is coaxial with the cylindrical element 3a.

[0097] Specifically, the sleeve element 22 can be made into a single element ( Figure 10a It can also be made as a single piece, or connected or connectable to accordion-shaped deformable elements 7 ( Figure 2 , 9 And 11a) or ring nut 2.

[0098] At least in the dispensing configuration prior to the first press of the dispensing head 16, at least one interference between the sleeve element 22 and the first cut-off element 20 and the second cut-off element 21, thereby blocking the conduit 3 and / or the central opening 12a.

[0099] The term "allocation construction" refers to the situation before allocator 1 is used.

[0100] In other words, this is the configuration of dispenser 1 when it is manufactured, installed, or purchased by a consumer. In other words, the dispensing configuration is the configuration in which dispenser 1 is never actuated.

[0101] Furthermore, preferably, in this distribution configuration, the distributor 1 is in a non-operational configuration, that is, in a configuration in which the distributor 1, in particular the distribution head 16, cannot be actuated.

[0102] The first embodiment of sleeve element 22 Figure 2 As shown in the image.

[0103] In this non-limiting example embodiment, the sleeve element 22 is located at least partially inside the cylindrical element 3a.

[0104] In the allocation construction, such as Figure 9 As shown, the distributor 1 holds the first cut-off element 20 by the interference of the sleeve element 22.

[0105] In other words, in the supply configuration, the first cut-off element 20 is housed in a portion 22a shaped to match the first cut-off element 20 of the sleeve element 22.

[0106] The part 22a that is shaped to match is shaped such that it partially surrounds and adheres to the first stop element 20 in a stable manner.

[0107] In this way, the first cut-off element 20 stably blocks the conduit 3, preventing liquid from passing through in both directions, thereby preventing liquid from rising from the bottle into the metering chamber 10a.

[0108] For example, in the accompanying drawings, the first stop element 20 has a substantially spherical shape, while the sleeve element is substantially cylindrical in shape, and is sized such that the misfit portion 22a can be held in place by interference.

[0109] Upon the first actuation of the dispenser 1, the second cut-off element 21 pushes the first cut-off element 20. In this way, the first cut-off element 20 moves away from the sleeve element 22 and is pushed toward the neck 3b.

[0110] In other words, during the first pressure period of the dispensing head 16, the second cut-off element 21 is configured to irreversibly push the first cut-off element 20 from the sleeve element 22 to the neck 3b.

[0111] In this case, the sealing portion 21b of the second shut-off element 21, which preferably has a bottom head 21d, slides at least partially in the conduit 3 during actuation, contacts the first shut-off element 20, forces it to release from the portion 22a shaped to match the sleeve element 22, and positions it to rest on the neck 3b of the cylindrical element 3a.

[0112] The portion 22a, which is formed into a matching part, is preferably configured to be (plastic or elastic) deformable so as to release the first stop element 20 when the first stop element 20 is pushed by the second stop element 21.

[0113] Therefore, advantageously, in the supply configuration, the sleeve element 22 works together with the first shut-off element 20 to make the dispenser 1 airtight, preventing the fluid contained in the bottle from reaching the metering chamber 10a.

[0114] Furthermore, advantageously, the non-operational configuration prevents pressing of the dispenser head 16 to prevent first undesirable activity of the dispenser 1, thereby allowing safe dispensing by the dispenser 1 without the use of special and expensive protective measures.

[0115] according to Figure 11a and Figure 11b In another non-limiting example embodiment shown, the second shut-off element 21 has a bottom head 21d that radially interferes with a portion of the sleeve element 22 for selectively sealing the conduit 3 in a non-operating configuration of the dispensing head 16. In other words, this portion of the sleeve element 22 is shaped to mate with the bottom head 21d to seal the conduit 3, while ensuring that in a non-operating configuration, the sealing portion 21b locks in a closed configuration that blocks the central opening 12a, which effectively defines two hermetically sealed elements along the path the fluid travels during actuation of the dispenser 1.

[0116] In other words, the sleeve element 22 works together with the second shut-off element 21 to allow the conduit 3 and the central opening 12a to be stably blocked in all configurations of the distributor 1 except for the operating configuration, in which, as described above, the first shut-off element 20 and the second shut-off element 21 allow fluid to pass unidirectionally from the neck 3b and the central opening 12a, respectively.

[0117] exist Figure 10a and Figure 10b In another non-limiting example embodiment shown, the sleeve element 22 is made in the form of a perforated cap and is stably anchored to the upper portion of the cylindrical element 3a.

[0118] Preferably, the perforated cap can be connected to or may be connected to the cylindrical element 3a, and thus has an anchoring device similar to that which allows the dispenser 1 to be anchored to the bottle.

[0119] In addition, the sleeve element 22 has a shoulder 22b that partially blocks the conduit 3.

[0120] The sealing portion 21b of the second stop element 21 is equipped with a bottom head 21d, which is configured to hold the adjacent shoulder 22b in a non-operating configuration.

[0121] In other words, the bottom head 21d is shaped to hook the shoulder 22b of the sleeve element 22, which serves as the end of the stroke of the bottom head 21d, keeping the sealing portion 21b adhered to the central opening 12a, thereby stably blocking the central opening 12a.

[0122] Advantageously, the sleeve element 22 works together with the second stop element 21 to block the central opening 12a in any configuration other than the operating configuration.

[0123] In other embodiments not shown, the sleeve element 22 is shaped such that it stably accommodates the first stop element 20 using a mating portion 22a, thereby stably blocking the conduit 3 in the dispensing configuration, and, for example, interfacing with the bottom head 21d of the second stop element 21 to block the conduit 3 or the central opening 21a.

[0124] Advantageously, the above-described distributor 1 can overcome the disadvantages of the prior art.

[0125] Advantageously, the material used to make dispenser 1 allows for the promotion of recycling.

[0126] Advantageously, when the distributor 1 is in the operating configuration, the recesses 5a and 7b that define the passage for compensating for air passage allow air to pass through.

[0127] In other words, even when using the accordion-shaped deformable element 7, the dispenser 1 according to the invention can replenish the volume of the extracted fluid.

[0128] Advantageously, the dispenser 1 according to the invention has strength characteristics so as to allow safe dispensing without the use of special protective devices.

[0129] Advantageously, the sleeve element 22 and the shut-off elements 20 and 21 airtightly seal the conduit 3 and / or the central opening 12, thereby securing the distributor 1 and preventing unwanted liquid leakage.

[0130] Furthermore, the sleeve element 22 and the stop elements 20 and 21 are sized and manufactured to optimize operation, regardless of the fluid to be dispensed, making the dispenser 1 versatile and usable for any type of fluid.

Claims

1. A dispenser (1) made of a plastic material for dispensing fluid contained in a bottle, the dispenser comprising: - Annular nut (2), which can be screwed onto the neck of a bottle and has: a cylindrical element (3a) internally formed and defining a conduit (3) for drawing fluid from the bottle; a series of holes (4) positioned around the conduit (3); And an inner cylindrical wall (5) provided with a partial groove (5a); the cylindrical element (3a) includes a neck (3b); - An accordion-shaped deformable element (7), which defines the return spring of the dispenser (1) and includes a cylindrical lower protrusion (7a) equipped with a corresponding partial groove (7b), and a sidewall (10) defining the metering cavity (10a) of the dispenser (1). - Ring (12), the ring being positioned on the annular nut (2) and designed to define a locking system together with the annular nut (2) by means of the reciprocating rotation of the ring (12) and the annular nut (2), the locking system being designed to define the operating and non-operating configurations of the distributor (1); the ring (12) also hooks onto the upper portion (11) of the accordion-shaped deformable element (7) to pull the accordion-shaped deformable element (7) during the reciprocating rotation, thereby aligning the partial groove (5a) of the annular nut (2) with the partial groove (7b) of the accordion-shaped deformable element (7) in the operating configuration, such that the partial grooves (5a, 7b) together with the series of holes (4) form a channel for compensating for air passage; - Dispensing head (16), when the dispenser (1) is in the operating configuration, the dispensing head can be pressed by the user, the dispensing head is operatively connected to the ring (12) and equipped with a collection chamber (16a), the collection chamber (16a) being designed to collect fluid flowing out from the metering chamber (10a) of the accordion-shaped deformable element (7) through the central opening of the ring, thereby dispensing the fluid through the outlet channel (16c); the collection chamber (16a) and the metering chamber (10a) are connected through the central opening (12a) of the ring (12); - First cut-off element (20), the first cut-off element is configured to be positioned on the neck (3b) and rise under negative pressure in the metering chamber (10a), thereby forming a check valve together with the neck (3b) for entering the metering chamber (10a); - A second shut-off element (21), which is integral with the dispensing head (16) and movably accommodated in the central opening (12a) of the ring (12) to define a delivery valve between the metering chamber (10a) and the collecting chamber (16a). The dispenser is characterized in that it includes a sleeve element (22) coaxial with the cylindrical element (3a), the sleeve element (22) interfering with at least one of the first stop element (20) and the second stop element (21) in the supply configuration at least before the first press of the dispensing head (16) to block at least one of the first stop element (20) and the second stop element (21) in a fixed position, which allows for stable blocking of the conduit (3) and / or the central opening (12a).

2. The distributor (1) as claimed in claim 1, characterized in that, The first cutoff element (20) has a substantially spherical shape, and the neck (3b) has a substantially annular shape.

3. The distributor (1) as claimed in claim 1, characterized in that, The second cutoff element (21) includes: - Anchoring portion (21a), the anchoring portion being designed to be received in the receiving portion of the dispensing head (16) so that the second stop element (21) and the dispensing head (16) are integral with each other; - A sealing portion (21b) having a generally elongated shape and designed to block the central opening (12a) to form a closed configuration of the delivery valve; - A connecting portion (21c) that connects the sealing portion (21b) to the anchoring portion (21a) and is configured to allow the sealing portion (21b) to move relative to the anchoring portion (21a) by elastic deformation, thereby opening the delivery valve when the pressure in the metering chamber (10a) is greater than a predetermined threshold.

4. The distributor (1) as claimed in claim 3, characterized in that, The anchoring portion is annular.

5. The distributor (1) as claimed in claim 3, characterized in that, The sealing portion (21b) is equipped with a bottom head (21d) configured to remain in contact with the shoulder (22b) of the sleeve element (22) in the non-operating configuration of the dispensing head (16).

6. The distributor (1) as claimed in claim 1, characterized in that, The sleeve element (22) is at least partially positioned inside the cylindrical element (3a).

7. The dispenser (1) as claimed in claim 6, characterized in that, The second shut-off element (21) is equipped with a bottom head (21d) that partially interferes with the sleeve element (22) for selectively sealing the conduit (3) in the non-operating configuration of the dispensing head (16).

8. The distributor (1) as claimed in claim 6, characterized in that, In the supply configuration, the first cut-off element (20) is held in the sleeve element (22) by interference.

9. The distributor (1) as claimed in claim 8, characterized in that, During the first press of the dispensing head (16), the second cut-off element (21) is configured to irreversibly push the first cut-off element (20) from the sleeve element (22) to the neck (3b).

10. The dispenser (1) as claimed in claim 1, characterized in that, The sleeve element (22) is made in the form of a perforated cap, which is anchored to the upper portion of the cylindrical element (3a).

11. The distributor (1) as claimed in claim 1, characterized in that, The sleeve element (22) is made as a single piece with the accordion-shaped deformable element (7) or with the annular nut (2).

12. The distributor (1) as claimed in claim 1, characterized in that, The plastic material is polyethylene.

13. The distributor (1) as claimed in claim 1, characterized in that, The plastic material is a bioplastic produced from non-fossil sources and belonging to the polyethylene family.

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