The present invention relates to a protective cap for a dispenser head of a fluid dispenser, in particular of the nasal-spray type, and such a dispenser head and a fluid dispenser including such a protective cap.
In the prior art, it is known to use a removable cap for closing the dispenser orifice of such a dispenser. Such caps are described in particular in documents WO 00/61454 and WO 98/00354.
While it is in its closed position, that type of removable cap closes the dispenser orifice in leaktight manner by means of a closure element that is fastened to the inside of the top wall of the cap. The closure element could be a deformable pad or an elastomer stopper of material that differs from the cap, and that is fastened to the inside of the top wall of the cap. Closure by means of the pad or the stopper occurs directly at, or inside, the orifice, thereby guaranteeing good sealing. However, after several successive uses of the dispenser, there exists a risk of that type of elastomer stopper or pad being irreversibly deformed, thereby leading to unreliable sealing. In addition, the dimensions of the closure element need to be adapted specifically to each type of dispenser orifice. The cap itself must be adapted specifically to the dimensions of the dispenser head, and its manufacture thus requires accurate control over dimensions so as to obtain perfectly leaktight co-operation between the closure element and the orifice. In particular, if the closure member is not dimensioned suitably, fluid can evaporate, with the risk of an incomplete dose being dispensed during the next actuation. Fluid can also dry out inside the dispenser head, possibly blocking the orifice and making it difficult, or even impossible, for fluid to be dispensed. In other circumstances, putting the cap into place on the head can turn out to be difficult, or even impossible, if the dimensions do not fit accurately.
Documents EP-0 131 501, WO 2007/009872, and EP-0 775 530 describe other prior-art devices including protective caps, each of which is merely engaged in removable manner on the dispenser head at its bottom edge.
An object of the present invention is to provide a protective cap that does not present the above-mentioned drawbacks.
In particular, an object of the present invention is to provide a protective cap that guarantees better sealing, with improved life-time for the dispenser device.
Another object of the present invention is to provide a protective cap that is simple and inexpensive to manufacture and to assemble.
Another object of the present invention is to provide a protective cap that can be adapted easily to the dispenser heads of existing dispensers, and that does not require any modification of the dispenser head, offering better dimensional compensation.
The present invention thus provides a protective cap for covering, in a closed position, a dispenser head of a fluid dispenser, said head including an end wall incorporating a dispenser orifice, and a lateral wall, said cap including, on its inside, at least one sealing profile that, in the closed position, co-operates in leaktight manner with the lateral wall of the head, in the proximity of said dispenser orifice.
Advantageously, said at least one sealing profile projects from a top and/or lateral inside wall of the cap.
Advantageously, in the closed position, said at least one sealing profile is deformed and/or compressed in leaktight manner against the dispenser head.
Advantageously, said at least one sealing profile comprises at least one: lip and/or bead and/or tab and/or flange and/or ring.
Advantageously, it is made as a single piece.
Advantageously, a lateral wall of the cap is conically shaped at least in part.
Advantageously, it is made of a plastics material that is substantially rigid.
Advantageously, it includes fastener means for holding it in stationary manner on the dispenser head.
The present invention also provides a dispenser head of a fluid dispenser, said dispenser head being characterized in that it includes a cap as described above.
Advantageously, the dispenser head includes a nasal-spray actuator including an axial central dispenser orifice made in the end wall of said dispenser head, said cap being made in the form of a hollow sleeve that is fastened around said nasal-spray actuator, said cap including an annular sealing profile that projects from its lateral inside wall and that co-operates in leaktight manner with the lateral wall of the dispenser head in the closed position.
Advantageously, the dispenser head includes a nasal-spray actuator including an axial central dispenser orifice made in the end wall of said dispenser head, said cap being made in the form of a hollow sleeve that is fastened around said nasal-spray actuator, said cap including an annular sealing profile that projects from the inside of the top wall and that co-operates in leaktight manner with the lateral wall of the dispenser head in the closed position.
The present invention also provides a fluid dispenser comprising a fluid reservoir and a dispenser member such as a pump or a valve, said fluid dispenser being characterized in that it includes a dispenser head as described above.
Other characteristics and advantages of the present invention appear from the following detailed description of two advantageous embodiments of the invention, given by way of non-limiting example, and with reference to the accompanying drawings, in which:
The present invention relates to a protective cap and to a dispenser head and a fluid dispenser including such a protective cap. Since the protective cap of the invention can be applied to any type of dispenser, the dispenser is not described in detail below.
With reference to
A removable protective cap 5 is shown in its closed position in the figures, in the form of a hollow sleeve. The cap includes a lateral inside wall 52 and a top wall 50 at its axially top end. In advantageous manner, the cap of the invention may include a lateral wall 52 that is conically shaped at least in part, and thus particularly well suited to different types of actuator. Although the cap 5 is made in the form of an elongate hollow sleeve in this embodiment, it could naturally have any other appropriate shape.
As shown in
In its closed position, the cap seals the dispenser orifice 401. To do this, the cap of the invention includes at least one sealing profile 500, 520 that projects from one of its inside walls, in the proximity of said dispenser orifice. The profile is advantageously made integrally with the cap, e.g. while said cap is being molded, thereby enabling said at least one sealing profile to have any shape. Advantageously, the cap of the invention is formed as a single piece, preferably made of a plastics material that is substantially rigid, that makes it possible both to co-operate with the head in leaktight manner, and to be manipulated by the user in easy, reliable manner, and without risk.
In a first embodiment, shown in
With reference to
With reference to
In the closed position of the cap, a small volume of air is held captive and interposed between the end wall 40 of the head, the top wall 50 of the cap, and the annular bead 520. The volume of air held captive is small enough to prevent the fluid from evaporating and/or drying out inside the orifice 401. However, since there is not a closure element that needs to co-operate directly with the dispenser orifice 401, the cap of the invention makes it easier to compensate for dimensional tolerances by creating a volume of air that is greater or smaller as a function of said dimensional tolerances. Since sealing is provided on the side of the head, there is no longer any obligation to provide a cap that fits the head very accurately, and manufacture of the cap consequently becomes simpler and less expensive.
With reference to
As in the first embodiment, in the closed position, it is possible for only a small volume of air to be interposed between the end wall 40 of the head and the top wall 50 of the cap, inside the annular flange. The space available for the volume of air held captive in the closed position is small enough to prevent any fluid from evaporating and/or drying out inside the orifice.
The present invention thus provides a protective cap for protecting, in leaktight manner, the dispenser orifice of a fluid dispenser, which cap is easy to put into place and to remove, guarantees sealing of the orifice in the closed position, even after many uses, and simultaneously prevents any fluid from evaporating or drying out in said dispenser orifice in the closed position.
The present invention is described above with reference to two advantageous embodiments thereof, but it is clear that it is not limited to said embodiments.
In particular, the cap may be of any shape, and the sealing profile(s) may be of any shape, position, and number. In addition, the sealing profile(s) are not necessarily made integrally with the cap, but could be molded on or the like, for example.
Other modifications could be applied by a person skilled in the art, without going beyond the ambit of the present invention, as defined by the accompanying claims.
Number | Date | Country | Kind |
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07 55198 | May 2007 | FR | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/FR2008/050863 | 5/19/2008 | WO | 00 | 11/19/2009 |