EP2244954A1

EP2244954A1 - Non-drip cap comprising an elastic means built into a valve

Info

Publication number: EP2244954A1
Application number: EP08839756A
Authority: EP
Inventors: Daniel De Rosa; Paulo Do Rosario
Original assignee: Maitrise et Innovation SAS
Current assignee: Maitrise et Innovation SAS
Priority date: 2007-10-17
Filing date: 2008-10-16
Publication date: 2010-11-03
Also published as: WO2009050223A1; US20100230376A1; FR2922527B1; FR2922527A1

Abstract

The invention relates to a so-called 'non-drip' cap (10) for a soft bottle (12) comprising a base (16) and a top (26) defining a chamber (32) for the throughflow of a product, in which a stop valve (34) of an outlet (30) is mobile, said valve being elastically retracted back into the throughflow chamber (32) by means of an elastic means (36). The invention is characterised in that the elastic means (36) consists of a series of at least three flexible lugs (38) which are regularly angularly distributed and project from a cylindrical body (40) of the valve (34), said lugs being supported against a wall of the base (16).

Description

"Drip stopper comprising an elastic means integrated with a valve"

The invention relates to a plug called "anti-drop" for a deformable bottle. The invention more particularly relates to a said plug

"anti-gout" for a deformable bottle containing a cosmetic, pharmaceutical, industrial or food product in liquid or creamy form, comprising:

a substantially tubular base, which is intended to be fixed in a sealed manner on a complementary tubular neck of the bottle, and whose so-called "bottom" transverse face comprises at least one inlet orifice communicating with the neck of the bottle,

a substantially tubular cap, which is received on the base, and a so-called "upper" transverse face has at least one outlet of the product, the cap and the base sealingly determining a passage chamber of the product, interposed between the inlet of the base and the outlet of the product, a shut-off valve, coaxial with the outlet orifice, being slidably mounted in the passage chamber between a closed position in which it closes the outlet of the product and an open position in which it is arranged back from the outlet of the product to allow passage, and the shutter valve being resiliently biased into the passage chamber by means of elastic means against the outlet of the product, to allow the shutter valve to move from its closed position to its open position under the pressure of the product. when a pressure is exerted on the flexible bottle, and the return of the shut-off valve from its open position to its closed position when the pressure is released on the flexible bottle. Numerous examples of plugs of this type are known.

Conventionally, the resilient means which is intended to allow the return of the shut-off valve consists of a flexible membrane insert, perforated to allow the passage of the liquid or creamy product, or consists of a spring of helicoidal metallic return which is interposed between the base and the valve.

The flexible diaphragm or the metal return spring therefore constitute add-on elements that increase the complexity of mounting a conventional anti-drip plug.

In particular, these inserts being intended to cooperate with the valve, it is necessary to provide means for centering the attached diaphragm or spring relative to the valve, and centering means of the attached diaphragm or spring reported at least relative to the base.

On the other hand, the use of an attached membrane or a spring reported in such an anti-drop cap considerably increase the cost of such a plug.

The invention overcomes this disadvantage by proposing an anti-drop plug comprising an elastic return means integrated with the valve. For this purpose, the invention proposes an anti-drop plug of the type described above, characterized in that the elastic means consists of a series of at least three flexible tabs distributed angularly in a regular manner and coming from material from a cylindrical body of the valve, and that i i are intended to bear against a wall of the base, to ensure the elastic return of the valve.

According to other features of the invention: the base comprises a so-called "inlet" duct, coaxial with the neck of the bottle, with the cylindrical body of the valve and with the outlet orifice, which communicates with the inlet orifice, and whose wall receives the flexible tabs of the resilient means, - the valve is integral with the base, each flexible tab of the elastic means having an upper end connected to the valve and a lower end connected to an inner edge of the wall of the inlet duct,

the valve is independent of the base, each flexible tab having an upper end connected to the valve and a lower end connected to a support ring which is intended to bear against a transverse shoulder face projecting from an inner edge of the wall of the inlet duct, the valve comprises a lower frustoconical bearing surface, turned towards the inlet orifice, which is intended to facilitate the passage of the product,

the flexible tabs are helically wound around the axis of the valve; the base comprises an inlet duct coaxial with the neck of the bottle, the cylindrical body of the valve and the orifice; outlet, which communicates with the inlet port, and which coaxially receives a tubular housing in which isse the valve and against a bottom bottom of which the flexible tabs of the valve are supported,

the valve comprises an upper frustoconical bearing which is intended to cooperate with a frustoconical seat arranged around a bore of the cap forming the outlet orifice, said frustoconical bearing being surmounted by a pin intended to penetrate into said bore, to ensure a sealing of the outlet orifice of the cap by the valve,

- The cap is mounted mobile coaxially to the base and is likely to be locked: In a low position in which the distance between the cap and the base is reduced so that the resilient tabs of the valve are strongly biased so that the valve permanently closes the outlet orifice, or

• in a high position in which the distance between the cap and the base is high so that the resilient tabs of the valve are weakly solicited permanently, so that the valve obturates the outlet orifice that in the absence of a liquid or creamy product pressure that can urge the valve towards its open position against the restoring force of the elastic tabs, the tubular cap is of a corresponding inner diameter at the outer diameter of the base and the cap has at least one radial finger, extending from an inner edge of its tubular wall, which is received in a helicoidal light formed on an outer edge of the tubular wall of the base, said light having close to its extrem ity corresponding to the lower position of the cap a lug which extends towards the inside of the light and which is intended to allow the locking of the igt at the end of the light, to allow movement of the cap between its high and low position by rotation and its locking in its low position,

the cap comprises an inner tubular bearing surface of an external diameter corresponding to the internal diameter of the inlet duct, in order to guage the cap relative to the base and to dislodge the product passage chamber; it, the cap comprises means for venting the bottle,

the means for venting the bottle comprise a predetermined setting of the flexible tabs of the elastic means which is intended to to allow the shut-off valve to be held in its open position as soon as a predetermined air pressure prevails in the bottle, and to allow the shut-off valve to return to its closed position when that said depression vanishes,

the air outlet means of the flask comprise at least one countersink which is formed on the periphery of the hole in the orifice of the cap and which opens into the frustoconical seat of the cap; air of the bottle comprise at least one means for angular indexing in rotation of the valve in its tubular housing, and at least a first vertically oriented boss, carried by the so-called "upper" transverse face of the cap that i is susceptible, when the cap is in its up position, to cooperate with the second vertically oriented boss carried by an upper face of the valve to cause a determined displacement of the valve towards its open position so as to take off the frustoconical bearing. upper section of the seat to allow the venting of the bottle,

the passage of the cap from its low position to its high position corresponds to a rotation of 90 degrees from this cap and the cap comprises two first bosses angularly positioned at 180 degrees to one another; the means of Rotational angular indexing of the valve in its tubular housing has a square profile, which extends from the lower bottom wall of the housing, and is received in a complementary cavity formed in the body of the valve. Other characteristics and advantages of the invention will become apparent from reading the detailed description which it is known for the understanding of which reference will be made to the appended drawings in which: FIG. 1 is a perspective view of an anti-drip plug according to a first embodiment of the invention;

- Figure 2 is an axial sectional view of the anti-drip plug of Figure 1 shown in the lower position of its cap;

- Figure 3 is an axial sectional view of the anti-drip plug of Figure 1 shown in the upper position of its cap and in a closed position of the valve;

FIG. 4 is a view in axial section of the anti-drip plug of FIG. 1 shown in the high position of its cap and in an open position of the valve;

FIG. 5 is a perspective view of an anti-drip plug according to a second embodiment of the invention;

FIG. 6 is a view in axial section of the anti-drop plug of FIG. 5 represented in the lower position of its cap;

- Figure 7 is an axial sectional view of the anti-drip plug of Figure 5 shown in the upper position of its cap and in a closed position of the valve; FIG. 8 is a view in axial section of the anti-drip plug of FIG. 5 represented in the high position of its cap and in an open position of the valve,

FIG. 9 is a view in axial section of an anti-drip plug according to a third embodiment of the invention shown in the lower position of its cap;

- Figure 1 0 is an axial sectional view of the anti-drip cap of Figure 9 shown in the upper position of its cap and in a closed position of the valve;

- Figure 1 1 is an axial sectional view of the anti-drip plug of Figure 9 shown in the upper position of its cap and in an open position of the valve; FIG. 12 is an exploded perspective view of a valve associated with a fourth embodiment of the invention;

FIG. 13 is a perspective view of a cap associated with the fourth embodiment of the invention;

FIG. 14 is a view in axial section of an anti-drop plug according to the fourth third embodiment of the invention shown in the lower position of its cap;

- Figure 1 5 is an axial sectional view of the anti-drip cap of Figure 14 shown in the upper position of its cap and in a closed position of the valve;

- Figure 1 6 is an axial sectional view of the anti-drip cap of Figure 14 shown in the upper position of its cap and in an open position of the valve. In the description that will suffice, like reference numerals designate like or similar parts.

The figures of the first, second, third and fourth embodiments of a "drip-free" stopper 10 are shown in the figures.

In a known manner, the cap 10 is intended to equ iper a deformable bottle 12 of a cosmetic, pharmaceutical, industrial or food, in liquid or creamy form. It will therefore be understood that the field of application of the plug 10 is applicable to a wide variety of fields.

The deformable flask 1 2 can in particular be a rigid bottle with a movable wall. This type of bottle is widely known from the state of the art and is for example used to contain toothpastes.

In such a bottle, the volume of the bottle varies as it is used, because the displacement of the mobile wall accompanying the evacuation of the product. The volume of the bottle is in this case always completely filled with product.

The bottle 12 may also be a flexible bottle which is intended to be pressed to cause the evacuation of the product. In such a bottle, the volume of the bottle is generally invariant, the product which is discharged from the bottle is replaced by air when the pressure exerted on the bottle is released.

In the remainder of the present description, the invention will be explained with reference to a flexible bottle, but it will be understood that this provision can not be limiting of the invention.

The bottle 12 has a neck 14. In known manner, the cap 10 comprises a substantially tubular base 16, which is intended to be sealed, on the tubular neck 14 complementary to the bottle 12. For example, and in a nonlimiting manner of the invention, the neck 14 of the bottle 12 comprises threads 18 which are intended to receive a complementary internal thread 20 of the base 16.

Of course, alternatively, the base 16 could be nested or snapped onto the neck of a vial 16 without threads.

A so-called "bottom" transverse face 22 of the base 16 comprises at least one inlet orifice 24 communicating with the neck 14 of the bottle 12.

In known manner, the cap 10 also comprises a substantially tubular cap 26, which is received on the base 16, and a so-called "upper" transverse face 28 has at least one outlet 30 of the product.

Furthermore, the cap 26 and the base 16 seal a chamber 32 for passing the product, interposed between the inlet port 24 of the base 16 and the outlet port 30 of the product.

In known manner, a shut-off valve 34, coaxial with the outlet orifice 30, is slidably mounted in the chamber passage 32 between a closed position, shown in Figures 3, 7, 10 and 15 in which it closes the outlet port 30 of the product of the cap 26 and an open position, shown in Figures 4, 8, 1 1 and 16 wherein it is arranged recessed from the outlet port 30 of the product to allow passage therethrough.

This valve 34 is resiliently urged into the passage chamber 32 via an elastic means 36 against the outlet orifice 30 of the product, to enable the valve 34 to be displaced from its closed position. at its open position under the pressure of the product when pressure is exerted on the flexible bottle 12, and the return of the valve 34 shutter from its open position to its closed position when the pressure is released on the flexible bottle 12.

According to the invention, the resilient means 36 consists of a series of at least three flexible tabs 38 angularly distributed regularly and integrally from a cylindrical body 40 of the valve 34, and which are intended to bear against a wall 42 of the base 16, to ensure the elastic return of the valve 34.

In the three preferred embodiments of the invention, as illustrated in particular in Figures 1 and 5, the flexible tabs 38 are helically wound around the axis of the valve. This configuration makes it possible to provide maximum flexibility of the tabs 38 while reducing the bulk.

In the first and second embodiments of the invention, the base 16 comprises a conduit 44 called "inlet", coaxial with the neck 14 of the associated bottle 12, the cylindrical body 40 of the valve 34 and the orifice 30, which communicates with the inlet orifice 24, and whose wall 42 receives the flexible tabs 38 of the elastic means 36. In a first embodiment which has been shown in FIGS. 1 to 4 and more particularly in FIG. 1, the valve 34 is integral with the base 16, each flexible tab 38 of the elastic means 36 having an upper end 46 connected to it. at the valve 34 and a lower end 48 connected to an inner edge of the wall 42 of the inlet duct 44.

Alternatively, in a second embodiment of the invention which has been shown in Figures 5 to 8 and more particularly in Figure 5, the valve 34 is independent of the base 16, each flexible tab 38 having an upper end 46 connected to the valve 34 and a lower end 48 connected to a support ring 50 which is intended to bear against a shoulder transverse face 52 projecting from an inner edge of the wall 42 of the inlet duct 44. In each of these two embodiments of the invention, it will be noted that the valve 34 comprises a lower frustoconical bearing surface 54, facing the inlet orifice 24, which is intended to facilitate the passage of the product.

It will be noted that, in particular in these two embodiments, the valve 34 has in its upper part corresponding to the frustoconical bearing surface 54 a projecting surface greater than that of its lower part situated under the tabs 38, so that any pressure on the bottle submits the valve 34 at a higher pressure on its upper part than on its lower part, causing its movement from bottom to top. This constructive arrangement being part of the sizing of the valve and being widely known in the state of the art, it will not be the subject of further description. In the first embodiment, the inlet orifice 24 is simply delimited by the pipe 44.

In the second embodiment, as illustrated in FIG. 5, the inlet orifice 24 consists of at least one light formed in the shoulder transverse face 52. In particular, the transverse face 52 may comprise two inlet orifices 24 having the shape of lunules.

In the third and fourth embodiments of the invention, which have been shown in FIGS. 9 to 11 and 14 to 16, the base 1 6 comprises, in a similar way, an inlet channel 44. Coaxial with the neck 14 of the bottle 1 2, with the cylindrical body 40 of the valve 34 and with the outlet orifice 30, which communicates with the inlet orifice 24. The valve 34 comprises in a similar way to the modes Previous embodiment of the flexible tabs 38 whose upper ends 46 are integral with the cylindrical body 40 of the valve 34.

The inlet duct 44 coaxially receives a tubular casing 47 for guiding the cylindrical valve 34 against a lower bottom wall 42 from which the lower ends 48 of the flexible tabs 38 of the valve 34 take advantage.

The body of the valve could be substantially tubular and cast out of the tubular casing 47. However, for reasons of compactness, the valve 34 is preferably cast inside the casing 47.

It will therefore be understood that, in the preferred embodiment of the invention, the housing 47 is closed off by the bottom bottom wall 42 and the valve is able to protrude outside the housing 47 only through an upper opening. 51 of the casing 47. This configuration ensures that the liquiqu ic or creamy product solicits only the upper part of the valve 34 when a pressure is exerted on the bottle 1 2, to cause opening.

It will also be understood that, preferably, the housing 47 is integral with the base 1 6. Furthermore, the valve 34 has an upper frustoconical surface 56 which is intended to cooperate with a frustoconical seat 58 arranged around a bore of the cap 26 forming the outlet orifice 30, said frustoconical surface 56 being surmounted by a pin 60 for penetrating into said bore 30, to seal the outlet orifice 30 of the cap by the valve 34.

Furthermore, the cap 10 advantageously comprises means for selectively allowing the passage of the product. For this purpose, as illustrated in FIGS. 2 to 4 and 6 to 11, whatever the embodiment of the invention, the cap 26 is mounted to move coaxially with the base 16 and is capable of to be locked:

in a low position, represented in FIGS. 2, 6, 9 and 14, according to which the distance between the cap 26 and the base 6 is reduced so that the elastic tabs of the valve 34 are strongly stressed so as to that the valve 34 permanently closes the outlet orifice 30, or

in a raised position, represented in FIGS. 3, 4, 7, 8, 10, 1 1, 1 5, 1 6 according to which the distance between the cap 26 and the base 16 is raised so that the elastic tabs 38 of the valve are poorly solicited permanently, so that the valve 34 obturates the outlet orifice in the absence of a liquid or creamy production pressure may solicit the valve 34 to its position opening against the restoring force of the elastic tabs 38.

To allow the movement of the cap 26 relative to the base 16 and its locking in each of two aforementioned positions, as illustrated in FIGS. 3, 4, 7, 8, 10, 11, 15 and 16, the tubular cap 26 is of an inner diameter corresponding to the outer diameter of the base 1 6 and the cap 26 has at least one radial finger 62, extending to from an inner edge 64 of its tubular wall, which is received in a helical slot 66 formed on an outer edge 68 of the tubular wall of the base.

As is illustrated more particularly in FIGS. 1 and 5, the light 66 comprising, close to its end 71 corresponding to the lower position of the cap, a lug 70 which extends towards the inside of the light 66 and which is intended to allow locking the finger 62 at said end 71 of the light 66, to allow the movement of the cap 26 and its locking in its low position.

Finally, it will be noted that the cap 26 has an inner tubular bearing surface 72 of an external diameter corresponding to the inside diameter of the inlet duct 44, in order to guide the cap 26 with respect to the base 16 and to delimit the chamber 32 of passage of the product.

In the first and second embodiments of the invention, the inner tubular bearing surface 72 receives the valve 34.

Another particularly advantageous feature of the invention, which more particularly relates to the case of a flexible bottle 12, is that the cap comprises means for venting said flexible bottle 12.

According to one embodiment (not shown), the plug 10 may consist of a plug 10 of the type described with reference to the first, second and third embodiments of the invention, with the difference that the setting means in the air of the bottle comprise a determined setting flexible tabs 38 of the resilient means 36. This setting is intended to allow the maintenance of the valve 34 shutter in its open position whenever an air depression determined reign in the bottle 12, and to allow the return of the valve 34 shutter in its closed position as soon as said depression is canceled. The venting means of the flexible bottle may be in particular mechanical positions that have been shown with reference to FIGS. 1 2 to 1 6, which figures represent a stopper operating according to the same principle as the stopper 10. described with reference to Figures 9 to 1 1.

In a general manner, the means for venting the bottle 12 comprise at least one countersink 53 which is formed around the periphery of the hole 30 of the cap 26 and which opens into the frustoconical seat 58. This countersink 53, which i communicates with the passage chamber 32, forms a vent allowing the air to be vented from the bottle 12.

This configuration, which has been shown in FIGS. 13 to 16, may also apply to any plug 10 of the type described above with reference to the first, second and third embodiments of the invention.

The particular architecture of the plug 1 0 according to the third embodiment of the invention nevertheless makes it possible to propose a fourth mode of real isation to improve the ventilation of the bottle 12 and allow an increased air passage through the countersink 53.

In this configuration, which, for the sake of memory, incorporates most of the constructional arrangements of the plug according to the third embodiment of the invention, the means for airtightness of the bottle 1 2 comprise at least: 55 angular indexing in rotation of the valve 34 in its tubular housing,

at least one first boss 57 of vertical orientation, carried by a transverse wall 49 of "upper" of the cap 26 that is likely, when the cap 12 is in its upper position, to cooperate with a second boss 59 d vertical orientation carried by an upper face 61 of the valve 34 to cause a determined displacement of the valve 34 to its open position so as to take off the frustoconical upper surface 56 of the frustoconical seat 58 to allow the venting of the bottle 12, as shown in Figure 15.

In the preferred embodiment of the invention, the passage of the cap 26 from its low position to its high position corresponds to a 90-degree rotation of said cap 26 and the cap 26 has two first bosses 57 angularly disposed at 180 degrees. one of the other. This configuration makes it possible to mount the cap 26 on the base 16 without worrying about the orientation of said cap 26, and to guarantee that the second boss 59 will be urged by one of the first bosses

57.

In the preferred embodiment of the invention the angular indexing means in rotation of the valve 34 in its tubular housing comprises a square profile 55, which extends from the bottom wall 42 of the bottom of the housing 47, and which is received in a complementary cavity 65 formed in the body of the valve 34. This arrangement ensures the proper orientation of the second boss 59 so that it is biased by a first boss 57 as shown in Figure 15.

Thus, in the low position of the cap 26 shown in Figure 14, no first boss 57 solicits second boss 59. The valve 34 is closed.

As soon as the cap 26 is pivoted, one of the first bosses 57 urges the second boss 59, and the valve 34 sees its frustoconical upper surface 56 detached from the frustoconical seat 58 to allow the venting of the bottle 12, as shown Figures 15 and 16.

The output of the product, shown in FIG. 16, is carried out in a manner similar to the preceding embodiments.

The invention thus proposes an anti-drop plug formed of a limited number of parts, and can therefore be produced at a reduced cost in large series.

Claims

1. Stopper (10) called "anti-drop" for a deformable bottle (12) containing a cosmetic, pharmaceutical, industrial or food product in liquid or creamy form, comprising:

- a substantially tubular base (16), which is intended to be sealingly attached to a tubular neck (14) complementary to the bottle (12), and a so-called "lower" transverse face (22) has at least one orifice d inlet (24) communicating with the neck (14) of the bottle (12),

- a substantially tubular cap (26), which is received on the base (16), and a so-called "upper" transverse face (28) has at least one outlet (30) of the product outlet, the cap (26) and the base (16) sealingly defining a product passage chamber (32) interposed between the inlet (24) of the base (16) and the outlet (30) of the product outlet , a shut-off valve (34), coaxial with the outlet orifice (30), being slidably mounted in the passage chamber (32) between a closed position in which it closes the outlet orifice (30). product and an open position in which it is arranged recessed from the outlet (30) of the product to allow passage, and the shutter valve (34) being elastically biased into the passage chamber (32). ) via an elastic means (36) against the outlet (30) of the product outlet, to allow the displacement of the valve (3 4) closing its closed position to its open position under the pressure of the product when pressure is exerted on the deformable bottle (12), and the return of the valve (34) shutter of its position opening to its closed position when the pressure is released on the deformable bottle (12), characterized in that the elastic means (36) consists of a series of at least three flexible tabs (38) angularly distributed uniformly and integrally formed from a cylindrical body (40) of the valve (34). ), and which are intended to bear against a wall (42) of the base (16), to ensure the elastic return of the valve (34).

2. Stopper (10) according to the preceding claim, characterized in that the base (16) comprises a conduit (44) said "input", coaxial with the neck (14) of the bottle (12), the cylindrical body ( 40) of the valve (34) and to the outlet orifice (30), which communicates with the inlet orifice (24), and whose wall (42) receives the flexible tabs (38) of the elastic means ( 36).

3. Stopper (10) according to the preceding claim, characterized the valve (34) is integral with the base (16), each flexible tab (38) of the resilient means (36) having an upper end (46) connected to the valve (34) and a lower end (48) connected to an inner edge of the wall (42) of the inlet duct (44).

4. Stopper (10) according to claim 2, characterized in that the valve (34) is independent of the base (16), each flexible tab (38) having an upper end (46) connected to the valve and an end lower section (48) connected to a support ring (50) which is intended to bear against a shoulder transverse face (52) projecting from an inner edge of the wall (42) of the inlet duct .

5. Stopper (10) according to any one of claims 2 to 4, characterized in that the valve (34) has a lower frustoconical bearing surface (56) facing the inlet orifice (24), which is intended to facilitate the passage of the product.

6. Stopper (10) according to claim 1, characterized in that the base (16) comprises a conduit (44) said "input" coaxial with the neck (14) of the bottle (12), the cylindrical body (40). ) of the valve (34) and to the outlet orifice (30), which communicates with the inlet orifice (24), and which coaxially receives a tubular casing (47) for slidingly guiding the valve (34) and against a wall (42) bottom bottom of which the flexible tabs (38) of the valve (34) bear.

7. Stopper (10) according to any one of the preceding claims, characterized in that the flexible tabs (38) are helically wound around the axis of the valve (34).

8. Stopper (10) according to any one of claims 2 to 7, characterized in that the valve (34) comprises an upper frustoconical bearing surface (56) which is intended to cooperate with a frustoconical seat (58) arranged around the a piercing of the cap (26) forming the outlet orifice (30), said frustoconical bearing surface (56) being surmounted by a pin (60) intended to penetrate into said bore (30), in order to seal the seal outlet port (30) of the cap (26) through the valve (34).

9. Stopper (10) according to one of the preceding claims, characterized in that the cap (26) is mounted movably coaxially with the base (16) and is lockable:

in a low position in which the distance between the cap (26) and the base (16) is reduced so that the resilient tabs (38) of the valve (34) are strongly biased so that the valve (34) permanently closes the outlet orifice (30) or

- in a high position in which the distance between the cap (26) and the base (16) is high so that the elastic tabs (38) of the valve (34) are weakly permanently solicited, so that the valve (34) obturates the outlet port (30) only in the absence of a liquid or creamy product pressure which can urge the valve (34) towards its open position against the restoring force of the elastic tabs (38).

10. Stopper (10) according to the preceding claim, characterized in that the tubular cap (26) has an inner diameter corresponding to the outer diameter of the base (16) and in that the cap (26) comprises at least a radial finger (62), extending from an inner edge (64) of its tubular wall, which is received in a helical lumen (66) formed on an outer edge (68) of the tubular wall of the base (16), said light (66) having near its end (71) corresponding to the lower position of the cap (26) a lug (70) which extends towards the inside of the light (66) and which is adapted to allow the finger (62) to be locked at said end (71) of the lumen (66), to allow movement of the cap (26) between its up and down position by rotation and its locking in its low position.

1 1. Stopper (10) according to one of claims 2 to 10, characterized in that the cap has an inner tubular surface (72) of an outer diameter corresponding to the inner diameter of the inlet duct (44), to ensure guiding the cap (26) relative to the base (16) and to define the chamber (32) for the passage of the product.

12. Stopper (10) according to any one of the preceding claims, characterized in that it comprises venting means associated with a flexible bottle (12).

13. Stopper (10) according to the preceding claim, characterized in that the venting means of the bottle comprise a determined setting flexible tabs (38) of the resilient means (36) which is intended to allow the maintenance of the valve (34) shutter in its open position as soon as a specific air pressure prevails in the bottle (12), and to allow the return of the valve (34) shutter in its closed position when said depression vanishes.

14. Stopper (10) according to claim 12 taken in combination with any one of claims 8 to 1 1, characterized in that the venting means of the bottle (12) comprise at least one countersink (63). which is formed around the bore of the orifice (30) of the cap (26) and which opens into the frustoconical seat (58) of the cap (26).

15. Stopper (10) according to any one of claims 12 to 14 taken in combination with claims 6 and 1 1, characterized in that the means for venting the flask (12) comprise at least:

- An indexing means (55) angularly rotatable valve (34) in its tubular housing,

at least one first vertically oriented boss carried by a so-called "upper" transverse wall of the cap (26) which is capable, when the cap is in its upper position, of cooperating with a second boss (59) vertical orientation carried by an upper face (61) of the valve (34) to cause a determined displacement of the valve (34) towards its open position so as to detach the upper frustoconical bearing surface (56) from the frustoconical seat ( 58) to allow the vial (12) to be vented.

16. Stopper according to the preceding claim, characterized in that the passage of the cap (26) from its low position to its high position corresponds to a 90-degree rotation of said cap and in that the cap (26) has two first bosses arranged angularly 180 degrees from each other.

17. Stopper according to one of claims 15 or 16, characterized in that the angular indexing means in rotation of the valve (34) in its tubular housing comprises a square profile (55), which extends from the lower bottom wall (42) of the housing (47), which is received in a complementary cavity (65) formed in the body of the valve (34).