FR3003479A1 - RECHARGEABLE FLUID PRODUCT DISPENSER. - Google Patents

Abstract

Rechargeable dispenser comprising a reservoir (R) and a pump without air intake (P) mounted on the reservoir (R) so that the pump (P) creates a vacuum in the reservoir (R), the pump (P) comprising a pump body (1), a pump chamber, a piston (3), an inlet valve (13, 131) and an outlet valve (23) connected to a dispensing orifice (21), the pump (P ) comprising a pusher (2) which is movable to thereby vary the volume of the pump chamber, the inlet valve (13) being connected to the reservoir (R) by a supply duct (14), the dispenser comprising in addition, a filling valve (5) through which fluid from a source flask (F) can be drawn into the reservoir (R) by the prevailing depression, characterized in that the dispenser further comprises an element shutter (39), distinct from the inlet valve (13, 131), which is movable between a closed position and an open position, this shutter member (39) sealingly engaging a closure seat (132) in a closed position to seal the supply conduit (14) to maintain the vacuum in the reservoir (R).

Description

The present invention relates to a refillable fluid dispenser comprising a reservoir and a pump without air intake mounted on the reservoir, so that the extraction of the fluid from the reservoir through the pump without air intake creates a depression in The reservoir. The pump comprises a pump body, a pump chamber, a piston, an inlet valve and an outlet valve connected to a dispensing orifice, the pump also comprising a pusher which is displaceable against a spring restoring an actuating axis to move the piston and thus vary the volume of the pump chamber. The inlet valve is connected to the reservoir by a supply duct, the dispenser further comprising a filling valve through which fluid from a source flask can be drawn into the reservoir by the prevailing depression. The preferred field of the present invention is that of perfumery, or else of cosmetics, where refillable or "nomadic" dispensers are more and more widespread. These refillable or nomadic dispensers have a reservoir of reduced capacity and can be filled from a dispenser or source bottle having a tank of greater capacity. In the prior art, document EP-1 473 233 describes a refillable dispenser comprising a rigid reservoir on which is mounted a pump without air intake (airless), so that the reservoir is in depression when it's empty. The filling of this tank is effected by suction from a distributor or source bottle through the outlet valve, the pump chamber and the inlet valve of the pump. More specifically, the outlet valve of the pump also serves as a filling valve which is biased in the open state by a pin forming part of the distributor or source bottle. Another document EP-2 441 344 describes a refillable dispenser comprising a rigid reservoir on which is mounted a pump without air intake (airless). The bottom of the tank is provided with a filling valve through which fluid from a source bottle can be drawn into the reservoir of the refillable dispenser.

In the refillable dispensers of these two documents of the prior art, the depression generated inside the tank tends to reduce over time due to micro-leaks through the airless pump and / or through the filling valve. . Indeed, it is extremely difficult, not to say impossible, to make a valve, whether inlet, outlet or filling, which is perfectly sealed, especially in the presence of a relatively large depression. Therefore, after a relatively short period of time, the initial vacuum in the tank has virtually disappeared. Suction filling is therefore no longer possible. An object of the present invention is to overcome the aforementioned drawback of the prior art by defining a refillable dispenser whose reservoir can remain in depression for an extended period of time, so that its filling by suction is still possible.

Another object of the present invention is to minimize the possible leakage paths at the reservoir. Yet another object of the present invention is to guarantee the maintenance of the vacuum without complicating the structure and / or operation of the refillable dispenser.

To achieve these various objects, the present invention proposes that the dispenser further comprises a closure member, distinct from the inlet valve, which is movable between a closed position and an open position, this closure member coming into sealing contact. with a closure seat in the closed position to seal the supply conduit to maintain the vacuum in the reservoir. Of course, the shutter member must not hinder or impede the normal operation of the dispenser, and in particular the dispensing of fluid product. The closure member is operative, namely in its closed position, when the refillable dispenser is at rest, so as to isolate the reservoir of the pump. In this way, all possible leak paths of the pump are neutralized or eliminated. Since the sealed mounting of the pump on the tank is generally well controlled, a risk of leakage at this level is virtually excluded. Another possible source of leakage would be through the filling valve, but by placing it beyond the closure member, this risk of leakage is also neutralized or eliminated. It must be kept in mind that the closure member is separate or dissociated from the inlet valve of the pump. Its function is also different from that of the inlet flap. The shutter member is in the open position during the fluid dispensing phases and during the filling phases, while the inlet valve is then in the closed position. The supply line that connects the reservoir to the inlet valve can be formed by the pump or the reservoir. By arranging the shutter member at this level, the filling of the reservoir is practically accomplished. According to a first embodiment of the invention, the shutter member is movable along the axis of actuation. Advantageously, the closure member is integral with the piston or the pusher.

Advantageously, the shutter member is biased in the closed position by the return spring. According to a practical embodiment, the sealing seat is formed by an inlet tube of the pump body which internally defines the supply duct. In this case, the filling valve can be mounted on the pusher and communicates with the supply duct through a connecting duct formed by the piston or the pusher. This first embodiment has the advantage that the closure member does not require a gesture or a particular actuation, since it is moved simply by pressing the pusher.

The user of the refillable dispenser is not even aware that it incorporates a shutter member to isolate the reservoir of the pump. On the other hand, it can be seen that all the dynamic members of the distributor move along the axis of actuation. The inlet tube, which defines the supply duct, internally forms a shutter seat for the movable shutter member and may externally form a seat for the inlet valve. It should also be noted that the arrangement of the filling valve on the pusher of the pump is a particular characteristic for a refillable dispenser which can be protected independently of the presence of a closure member. According to a second embodiment of the invention, the closure member is movable along a closure axis which is perpendicular to the axis of actuation of the pusher. The closure member may be translatable or rotated. Advantageously, the closure member is mounted on the pump body which forms the sealing seat. Advantageously, the filling valve is mounted on the pump body and communicates with the reservoir through the supply conduit when the closure member is in the open position. Alternatively, the filling valve is mounted on the closure member and communicates with the supply conduit. The filling valve can thus be dissociated from the closure member, or on the contrary integrated with the closure member. According to another aspect of the invention, the closure member is biased resiliently in the open position. Preferably, the closure member comprises a cam surface intended to be pushed by a protective cover which caps the pusher to move the closure member in the closed position. Thus, the shutter member is necessarily in the closed position when the protective cover is in place on the distributor, and is necessarily in the open position when the protective cover is removed. In this way, the user does not need to perform a particular operation or actuation to open and close the shutter member. Alternatively, the filling valve may comprise a shutter which closes the supply conduit to the pump when the filling valve is open and communicates with the reservoir. In this way, the pump is isolated during the filling operation of the tank. According to another variant, the closure member is biased resiliently in the closed position and pushed into the open position either manually or by the pusher. This requires simultaneously actuating the shutter member and the filling valve. In this second embodiment, the closure member is completely dissociated from the dynamic components of the pump, which are the piston and the pusher. The closure member is here completely mounted on the pump body at the level where it forms the supply duct connecting the inlet valve of the pump to the tank. The filling valve is disposed upstream of the closure member so that it can not cause a risk of leakage. This filling valve can be mounted on the pump body, independently of the closure member, or be integrated with the closure member. Although the positioning of the filling valve downstream of the closure member is preferred, the present invention does not exclude a positioning of the filling valve directly on the tank upstream of the closure member. However, in this case it must be ensured that the filling valve does not cause a leakage path. The invention will now be further described with reference to the accompanying drawings, giving by way of non-limiting examples, two embodiments of the invention, as well as variants. In the figures: FIG. 1 is a vertical cross-sectional view through a refillable dispenser according to a first embodiment in a rest or non-use phase. FIG. 2 is a view similar to that of FIG. 1 for the distributor. in the first embodiment during a filling phase, FIG. 3 is a view similar to FIGS. 1 and 2 for the refillable dispenser according to the first embodiment during a fluid dispensing phase, FIG. 4 is a view similar to that of FIG. 1 for a variant of the first embodiment of the invention. FIGS. 5a, 5b and 5c are diagrammatic cross-sectional views through a refillable dispenser according to a second embodiment of FIG. embodiment of the invention, respectively in the storage position, in the use position and in the filling position, FIGS. 6a, 6b and 6c are views similar to FIGS. 5c for a first alternative embodiment, Figures 7a, 7b and 7c are views similar to Figures 5a, 5b and 5c for a second alternative embodiment, and Figure 8 is an enlarged partial view similar to that of Figure 5b for a third variant embodiment. Referring firstly to Figures 1 to 3 to describe in detail the structure and operation of a fluid dispenser according to a first non-limiting embodiment of the invention. The fluid dispenser comprises two main components, namely a fluid reservoir R with a collar R1 and a pump P which is fixedly mounted and sealed on the neck R1 of the reservoir. The reservoir R is preferably rigid or semi-rigid, so as to withstand an internal depression. The tank R can be made in one piece from suitable materials, such as glass, plastics, metal, etc. The bottom (not shown) of the tank is closed, and the neck R1 can define a constriction forming a narrowed opening which communicates the interior of the tank with the outside. The neck R1 may be formed with an outer annular reinforcement R2 which will serve in a conventional manner for the attachment of the pump P. An annular collar seal R3 may be arranged on the upper edge of the neck R1 to ensure the seal between the tank and pump. The pump P is a pump without air intake or "airless", which does not allow outside air entering the tank as the fluid product is extracted. In other words, the airless pump P only allows the extraction of the fluid from the tank, without outside air intake. As a result, an increasing depression is generated inside the tank R as fluid is withdrawn from the pump. When the tank R was completely emptied of its contents, the depression reached its maximum level. We will see below how the airless pump P allows the passage of fluid from a source bottle F, the fluid being sucked through the pump P by the vacuum inside the tank R The pump P comprises the following constituent elements, namely a pump body 1, a pusher 2, a piston 3, a return spring 4, a filling valve 5 and a protective cover 6 which is optional. All these components can be reported on each other axially along an axis of actuation X. All these elements can be made by injection molding plastic material, the protective cover 6 can also be made with other materials, such as metal. The pump body 1 is fixedly mounted on the neck R1 of the tank R by means of an annular fixing flange 10 which engages around the projecting annular reinforcement R2 of the neck of the tank. The fixing flange 10 may for example be snapped under the annular reinforcement R2. This also makes it possible to crush the neck seal R3 on the annular upper edge of the neck R1. The fastening flange 10 is concentrically surrounded by a bushing 17 which is advantageously externally threaded to engage a threaded skirt formed by the protective cover 6. A seal 62 may be provided to be compressed between the pump body 1 and in shoulder of the capo 6 to increase the sealing of the distributor. Inside the fixing flange 10 concentrically extends a hooking tube 11 into which is inserted a dip tube 12 which extends to near the bottom (not shown) of the tank. Substantially in the extension of this attachment tube 11 extends upwardly an inlet tube 13 which internally defines a supply conduit 14. The inner wall of this inlet tube 13 may advantageously be provided with a or several vertical grooves 133. The upper end of this inlet tube 13 also internally forms a shutter seat 132, whose function will be given below. The outer wall of this inlet tube 13 forms an inlet valve seat 131, as will be seen hereinafter. The pump body 1 also forms a main shaft 15 which extends concentrically around the inlet tube 13. A guide flange 16 concentrically extends around the main shaft 15. The pump body 1 can further Other elements, such as an axial guide sleeve for the piston 3. Advantageously, the pump body 1 is made integrally. Once mounted on the tank R, it is intended to no longer be removed. Thus, the only possible communication between the interior of the tank R and the outside is through the plunger tube 12 and the supply duct 14. The pusher 2 forms a dispensing orifice 21, which is advantageously arranged laterally , and which can be formed by a nozzle reported in a suitable housing. This is a very classic measure in the field of perfumery, cosmetics or even pharmacy. Internally, the pusher forms a secondary shaft 22 for sliding the piston 3, as will be seen below. The pusher 2 also forms an annular outlet valve seat 23 which cooperates with the piston 3, as will be seen hereinafter. The pusher 2 also forms a pivoting cover 24 which makes it possible to mask / disengage the filling valve 5 which is here mounted on the pusher 2. For this purpose, the pusher 2 forms an axial tube 25 which projects downwards. The filling valve 5 is mounted in this tubing 25 so as to be accessible and operable when the lid 24 is open, as can be seen in FIG. 2. The filling valve 5 may quite simply comprise a movable valve member. 51 which is biased on a valve seat formed by the pipe 25 by a spring 52 which is supported on a support member 53 secured to the pipe 25. At rest, the spring 52 urges the movable member 55 against a seat 255 formed However, when a bearing force is applied downwards on the upper end of the movable member 51, it moves against the force exerted by the spring 52. in order to break the sealed contact with its seat 255. The operation of this filling valve is completely conventional and conventional. The piston 3 slides both sealingly in the main shaft 15 of the pump body 1 and in the secondary shaft 22 of the pusher 2 under the effect of the pressure variation that prevails inside a pump chamber formed between these three elements. This piston 3 can therefore be described as a differential piston which moves both with respect to the pump body 1 and the pusher 2. This differential piston 3 comprises a main lip 31 which slides in a sealed manner inside the barrel The differential piston 3 also comprises a secondary lip 32 which slides in a sealing manner inside the secondary shaft 22 of the pusher 2. The piston 3 also comprises a sleeve 36 which slides in a sealed manner around the tubing 25 of the pusher 2. At its lower end, the sleeve 36 forms a movable inlet valve member 37 intended to come into sealing sliding contact with the inlet valve seat 131 formed by the outer wall of the tube. 13. The differential piston 3 also forms a movable outlet valve member 33 intended to come into selective sealing contact with the outlet valve seat 23 formed by the pusher 2. Beyond at the outlet valve, an annular outlet chamber 34 is defined between the pusher 2 and the piston 3 which communicates directly with the dispensing orifice 21. The piston 3 also forms a communication passage 35 which connects a low chamber Cb formed between the pump body 1 and the differential piston 3 to a high chamber Ch formed between the pusher 2 and the differential piston 3. These two low chambers Cb and high Ch together form the pump chamber C of the airless pump P. Because that the differential piston 3 slides inside the pusher 2, this airless pump is often referred to as a "push pump", in particular because the pusher 2 plays an active role in the operation of the pump forming the part high Ch of the pump chamber. In the rest position shown in Figure 1, the inlet valve formed by the movable member 37 and the seat 131 is open, while the outlet valve, formed by the movable member 33 and the seat 23, is closed under the action of the return spring 4 which bears between the pump body 1 and the differential piston 3.

According to a characteristic of the invention, the sleeve 36 internally forms a connecting channel 38 which connects the filling valve 5 to the supply conduit 14. In the rest position of FIG. 1, this connecting channel 38 also communicates with inside the pump chamber, since the inlet valve is open. On the other hand, the differential piston 3 forms a closure member 39 which extends inside the connecting duct 38 and which is engaged in the inlet duct 13 inside the supply duct 14 This shutter member 39 is axially movable along the axis of actuation X between a closed position shown in FIG. 1 in which the closure member 39 is in sealing contact with the sealing seat 132 formed in FIG. the interior of the inlet tube 13, and an open position in which the closure member 39 is pushed into the interior of the supply duct 14 so as to break the sealing contact with its seat 132, as shown in FIG. In other words, the closure member 39 is in the sealed closed position when the pump is at rest and in the open position when the differential piston 3 is moved downwards. This occurs by pressing the pusher 2, either during a fluid dispensing phase as shown in Figure 3, or during a filling phase, as shown in Figure 2. Indeed, when the lid 24 is open, a nozzle F1 of a source bottle F can be pressed against the movable member 51 of the filling valve 5 so as to open. However, pressing against the filling valve 5, the pusher 2 is depressed, also moving the differential piston 3 so as to bring the closure member 39 in the open position. Direct communication is then established between the tank R which is under vacuum and the source bottle F which is at atmospheric pressure. This communication is done through the plunger tube 12, the supply duct 14, the connecting duct 38 and the filling valve 5 forced into the open state by the nozzle F1 of the source flask F. It may be noted that the flap the inlet member is closed, since the annular movable member 37 is sealingly engaged around its seat 131 formed by the inlet tube 13. Fluid product from the source bottle F is thus sucked into the tank R until the filling valve 5 is forced to the open state until the pressures in the respective tanks are balanced. Since the refillable dispenser of the invention is effected by suction generated by the underpressure of the reservoir, it is advisable or important to maintain the vacuum level inside the reservoir. This is made possible thanks to the invention by the presence of the closure member 39 sealingly closing the only communication passage that exists between the reservoir R and the pump P. The closure member 39 is it is biased in its sealed closed rest position by the return spring 4. As a result, it is no longer necessary to ensure that the other sealed contacts of the pump are optimal. The general architecture of this airless plug pump, which is also known in principle from the prior art, allows easy mounting of the filling valve 5 on the pusher 2 and the formation of a connecting channel 38 to connect the filling valve 5 to the tank, without passing through the outlet valve or the inlet valve. This is possible because the inlet and outlet valves have a concentric coaxial annular configuration so as to disengage the central axial space allowing the arrangement of the filling valve 5, the connecting duct 8 and the control member. In a very schematic way, it can be said that the filling function occupies a central axial position, while the distribution function occupies a peripheral annular position. In a variant shown in FIG. 4, it can be seen a pump Pa integrating a closure member 55, which may be substantially similar or identical to the closure member 39, is connected directly by tabs 54 to the element of FIG. support 53 of an alternative filling valve 5 '. In this case, it can be said that the closure member 55 is integral in displacement of the pusher 2, since the support member 55 is fixedly engaged inside the tubing 25 of the pusher 2. Thus, the shutter member may be secured to either the differential piston 3 or the pusher 2.

Referring now to Figures 5a, 5b and 5c to describe in detail the structure and operation of a refillable dispenser according to a second non-limiting embodiment of the invention. This refillable dispenser comprises a fluid reservoir R which may be the same or similar to the reservoir of the first embodiment. The airless pump P 'is also of the "pusher pump" type, since it comprises a differential piston 3 which slides in a sealed manner both inside a pusher 2 and on a pump body 1. Pusher 2 is simpler than that of the first embodiment, since it does not include a filling valve. On the other hand, it still defines a lateral distribution orifice 21 and an annular outlet valve seat 23. The differential piston 3 has a structure generally similar to that of the first embodiment, except that it does not incorporate shutter member. This differential piston 3 comprises a main lip slidably and sealingly engaged in the main drum of the pump body, as well as a secondary lip in leaktight sliding contact inside the secondary drum. The differential piston 3 also comprises an annular movable outlet valve member 33 which comes into selective sealing contact with the seat 23 of the pusher 2 '. The differential piston 3 also forms a movable inlet valve member 361 which is engaged inside the inlet tube 13 of the pump body 1. The differential piston 3 also forms a communication passage between a lower chamber and a upper chamber, just as in the first embodiment. The inlet tube 13 internally forms a feed conduit 14 which extends to the level of the dip tube 12 which is engaged inside a connecting tube. In this second embodiment, the pump body 1 serves to support a filling valve 5a comprising a movable member 51 movable against a spring 75. The movable member 51 is accessible laterally at a housing suitable for receiving an F1 nozzle from a source bottle. The pump body 1 also serves as a support for a closure member 7a which comprises a slider 71 biased in the rest position by the spring 75. This slider 71 forms a closure sleeve 72 which is movable along a shutter axis Y which is perpendicular to the axis of actuation X between a closed position and an open position. This closure sleeve 72 extends at the level of the supply duct 14 so as to seal it in a sealed manner in the rest position, as shown in FIG. 5a. The closure sleeve 72 then comes into sealed contact with a cylindrical sealing seat 142 formed by the pump body. In the open position shown in FIGS. 5b and 5c, the closure sleeve 72 is disengaged from its seat 142 so as to disengage the supply conduit 14. More specifically, the pump body 1 forms an intermediate transverse chamber 141 on the supply duct 14, this chamber 141 communicating with both the reservoir and the inlet valve in the open position and being insulated from both the reservoir and the inlet valve in the closed position. It may be noted that the spring 75 urges the filling valve 5a in the closed position and the closure member 7a in the open position. In the open position of FIG. 6b, the filling valve 5a communicates with the reservoir R through the transverse intermediate chamber 141 and the lower portion of the supply channel 14. In the closed position of FIG. 5, the filling valve 5a certainly communicates with the transverse intermediate chamber 141, but it is isolated from both the reservoir and the inlet valve. Advantageously, the slider 71 forms an inclined cam surface 73 which can be urged or pushed by a skirt 61 of a protective cover 6 in the storage position, as shown in FIG. 5a. In this way, the closure member 7a is always in the closed position when the protective cover 6 is in place on the pusher 2, and always in the open position, when the protective cover 6 is removed. The user does not have to worry about the state of the shutter member 7.

It can also be noted that the filling valve 5a comprises a shutter 56 which is movable with the movable member 51 so as to cut the supply conduit 14 towards the pump P ', when the filling valve is open, that is to say when the movable member 51 is depressed, for example by the nozzle F1 of a source bottle, as can be seen in Figure 5c. The nozzle F1 then communicates with the reservoir R through the open filling valve, the chamber 141, the lower part of the supply conduit 14 and the plunger tube 12, while the pump P ', at least its pump chamber, is isolated. This ensures that there is no leakage when filling the pump. Referring to FIGS. 6a, 6b and 6c, there is shown a first embodiment in which a pump P "incorporates a closure member 7b, which also forms a closure sleeve 72, but which is biased in the closed position by the spring 75. The cover 6 does not interact with the closure member 7b, as can be seen in FIG 6a.To improve the seal, the closure member 7b comprises an annular lip 76 which slides The obturator 7b comprises an actuating pin 73b on which the user can press to bring the valve into the open position, when it is desired to dispense the fluid product. both press the actuating nipple 73b of the shutter member and the pusher 2, as shown in Figure 6b.The filling valve 5b then remains inoperative.When the user wants to fill the tank R, he presses the F1 nozzle of a source bottle against the e filler valve 5b so as to open. Simultaneously, it presses the actuating pin 73b of the closure member to establish a communication between the chamber 141 and the conduit 14, as shown in Figure 6c. Referring to FIGS. 7a, 7b and 7c, there is shown a second embodiment in which a pump P "'integrates a closure member 7c, which is also biased by the spring 75 in the closed position, as can be seen in FIGS. The closing member 7c comprises an actuating pin 73c which is positioned on the path of movement of the pusher 2. More specifically, the pusher 2 may comprise an extension 27 which defines a bearing edge suitable for push on the pin 73c to push the shutter member into the open position, as shown in Figure 7c Thus, the shutter member is always in the open position when the pusher is depressed, even slightly. the case during the fluid dispensing phases During the filling of the tank R, the user must both press the nozzle F1 against the filling valve 5c to open it and press, even very slightly, on the pusher toThe nozzle may then communicate with the reservoir R through the open filling valve, the chamber 141, the lower part of the supply conduit 14 and the plunger tube 12. Referring to FIG. sees a third embodiment in which a pump P "" comprises a shutter member 7d which incorporates a filling valve 5d. The filling valve 5d can communicate with an intermediate transverse chamber 141 through a connecting channel 74. When the shutter member 7d is in the open position, it is sufficient for the user to apply the outlet nozzle of a source vial against the filling valve 5d to fill the reservoir R by suction of fluid product. Without departing from the scope of the present invention, it is possible to provide the filling valve at the pusher 2 or even at the level of the reservoir R. Thanks to the present invention, there is a rechargeable refillable dispenser whose reservoir can be effectively closed to maintain depression. The arrangement of the fill valve on the pump is advantageous.

Claims (14)

CLAIMS1.- Refillable fluid product dispenser comprising a reservoir (R; R ') and a pump without air intake (P; Pa; P'; P "; P" '; P "") mounted on the reservoir (R ) so that extraction of the fluid product from the reservoir (R) through the pump without air intake (P; Pa; P '; P "; P"'; P "") creates a vacuum in the reservoir ( R), the pump (P; Pa; P '; P "; P"'; P "") comprising a pump body (1), a pump chamber, a piston (3), an inlet valve ( 13, 131; 13, 361) and an outlet valve (23, 33) connected to a dispensing orifice (21), the pump (P; Pa; P '; P "; P"'; P "") comprising a pusher (2) which is movable against a return spring (4) along an actuating axis X to move the piston (3) and thus to vary the volume of the pump chamber, the valve the inlet (13, 131; 13, 361) being connected to the tank (R) by a supply duct (14), the dispenser further comprising a filling valve issage (5; 5 '; 5a; 5b; 5c; 5d) by which the fluid product from a source bottle (F) can be sucked into the tank (R) by the prevailing depression, characterized in that the dispenser further comprises a closure member (39; 7a; 7b; 7c; 7d), distinct from the inlet valve (13,131; 13,361), which is movable between a closed position and an open position, this closure member (39; 55; 7a; 7b; 7c; 7d) sealingly engaging a closure seat (132; 142) in a closed position to seal the supply conduit (14) to maintain the vacuum in the reservoir (R). 2. The dispenser of claim 1, wherein the shutter member (39; 55) is movable along the axis of actuation X. 3. The dispenser of claim 2, wherein the closure member (39; 55) is integral with the piston or the pusher. 4. A dispenser according to claim 2 or 3, wherein the shutter member (39; 55) is urged in the closed position by the return spring (4). 5. A dispenser according to any one of claims 2 to 4, wherein the closure seat (132) is formed by an inlet tube (13) of the pump body (1) which defines the interior of the duct. power supply (14). 6. Dispenser according to any one of claims 2 to 5, wherein the filling valve (5; 5 ') is mounted on the pusher (2) and communicates with the supply conduit (14) through a conduit link (38) formed by the piston (3) or the pusher (2). 7. A dispenser according to claim 1, wherein the shutter member (7a; 7b; 7c; 7d) is movable along a shutter axis Y which is perpendicular to the axis of actuation X of the pusher (2 ). 8. A dispenser according to claim 7, wherein the closure member (7a; 7b; 7c; 7d) is mounted on the pump body (1) which forms the closure seat (142). 9. A dispenser according to claim 7 or 8, wherein a filling valve (5a, 5b, 5c, 5d) is mounted on the pump body (1) and communicates with the reservoir (R) through the conduit. supply (14) when the closure member (7a; 7b; 7c; 7d) is in the open position. 10. A dispenser according to claim 9, wherein the filling valve (5d) is mounted on the closure member (7d) and communicates with the supply duct (14). 11. A dispenser according to any one of claims 7 to 10, wherein the closure member (7a; 7d) is biased resiliently in the open position. 12. A dispenser according to claim 11, wherein the closure member (7a; 7d) comprises a cam surface (73a; 73d) intended to be pushed by a protective cover (6) which caps the pusher (2). ) to move the shutter member (7a; 7d) to the closed position. 13. A dispenser according to claim 9, wherein the filling valve (5a) comprises a shutter (56) which intersects the supply duct (14) to the pump (P ') when the filling valve ( 5a) is open and communicates with the reservoir (R). 14. A dispenser according to any one of claims 7 to 9, wherein the closure member (7b, 7c) is elastically biased in the closed position and pushed in the open position either manually or by the pusher (2). 20