Abstract:
The invention relates to a wiper fluid container ( 18 ), comprising a fluid dispensing opening ( 22 ) equipped with first connecting means ( 24 ) configured to cooperate with second connecting means ( 26 ) for an opening of a member such as a pump ( 16 ) or reservoir in order to ensure fluid communication between those openings, characterized in that said first connecting means comprise a movable element ( 24 ) able to move from a first position closing of the opening of the container to a second position freeing that opening, said first means being configured to cooperate with the aforementioned second means to cause the movable member to move from the first position to the second position.

Description:
TECHNICAL FIELD 
       [0001]    The present invention relates to a wiper fluid container, a member, such as a pump or a reservoir, designed to be connected to that container, a wiper fluid supply device, and a vehicle windshield washing system. 
       PRIOR ART 
       [0002]    Motor vehicles are commonly equipped with washing systems for cleaning the windshield of that which might block the vehicle passengers&#39; view, such as splashes, insects, frost or ice. Such washing systems are combined with windshield wiper systems and comprise a wiper fluid reservoir installed on the vehicle and spray means to enable the liquid contained in the reservoir to be sprayed toward the windshield. For enhanced cleaning of the windshield, it is possible to add to the usual wiper fluid a supplementary product suited to the season and/or to the effect sought. For example, this prodct may improve the removal of insects in the summer or the defrosting of the windshield in winter. It is generally added to the usual wiper fluid and sprayed on to the windshield in conjunction with said fluid. 
         [0003]    In the technical field as it stands, filling of the reservoir with wiper fluid or the addition of the supplementary product into this reservoir is performed using a funnel, that part of the funnel of smallest cross section being inserted into an opening in the reservoir and the fluid or product then being poured into the flared part of the funnel, which has a larger cross section. 
         [0004]    However, such filling is not without difficulty and may give rise to spillages of wiper fluid or supplementary product, the latter being relatively expensive. Indeed, when the container containing the supplementary product is brought close to the opening of the reservoir with a view to filling the latter, or is moved away from said reservoir after the latter has been filled, product is still able to escape from the container, which is uneconomical. Moreover, anyone can fill the reservoir in this way. There is thus a risk that an unsuitable product might be introduced into the reservoir and damage the washing system. 
         [0005]    The particular object of the present invention is to provide a simple, effective and inexpensive solution to at least some of these problems. 
       DISCLOSURE OF THE INVENTION 
       [0006]    The invention proposes a wiper fluid container, comprising a fluid dispensing opening equipped with first connecting means configured to cooperate with second connecting means of an opening of a member such as a pump or a reservoir in order to ensure fluid communication between those openings, characterized in that said first connecting means comprise an element that can move from a first position closing off the opening of the container to a second position of freeing that opening, these first means being configured to cooperate with the aforesaid second means in order to cause the movement of the movable member from the first to the second position. 
         [0007]    The dispensing opening of the container is thus freed only when the movable element is in its second position. Movement of the movable member from the first to the second position results from cooperation between the connecting means of the container and of the member. Cooperation between the connecting means of the container and of the member is thus necessary to free the opening of the container and to allow the dispensing of fluid via said opening. In other words, in the absence of such cooperation, the opening of the container is closed off and the fluid in the container thus cannot exit via said opening. The invention therefore makes it possible to limit spillages of wiper fluid, such as a conventional cleaning liquid or a specific product (fly- or frost-removal product). 
         [0008]    Preferably, the first connecting means comprise a bung mounted at the opening of the container and including at least one hole or one slit for the passage of liquid. 
         [0009]    According to a first embodiment of the invention, the bung forms the aforesaid movable element and can be moved in rotation about its longitudinal axis relative to the container, between a first position in which the bung closes off the opening of the container and a second position in which said at least one hole or said at least one slit of the bung is in fluid communication with that opening. 
         [0010]    Advantageously, the bung comprises a transverse wall in which said at least one hole or said at least one slit is formed. This transverse wall may be configured to prevent the use of a funnel for filling the container and, in particular, for preventing the engagement of the part of smaller cross section of this funnel in the opening of the container. 
         [0011]    The bung may be configured to be at least partly embedded in the second connecting means. The bung preferably comprises locating means configured in order, in the embedded position, to cooperate with the corresponding means of the second connecting means to allow the member to be supplied with fluid. These locating means make it possible to limit the risk that a person might supply the member with an unsuitable product. 
         [0012]    The locating means may comprise at least one projecting element carried by the bung and configured in order, in the embedded position, to cooperate with a movable element of the second connecting means in order to cause movement of that movable element and to allow the member to be supplied with fluid. Thus, if a container without a projecting element were connected to the member, it would be impossible to supply the member because the movable element would not be moved. 
         [0013]    The bung may comprise a plurality of projecting elements that are evenly distributed about the longitudinal axis of the bung. These projecting elements may extend substantially radially relative to the longitudinal axis of the bung or are curved and extend about that longitudinal axis. 
         [0014]    According to one aspect of the invention, the bung forms the movable element and can be moved in rotation about its longitudinal axis relative to the container and in translation along that longitudinal axis, the bung being movable in translation between a first position in which the bung closes off the opening of the container and a second position in which said at least one hole or said at least one slit of the bung is in fluid communication with that opening. This may be implemented by means of a bayonet or thread link between the bung and the container. 
         [0015]    According to a further embodiment of the invention, the movable element is a bead enclosed in a housing of the bung and urged by return means into a position closing off a hole of the bung, in which the bead bears against a seat extending around that hole. 
         [0016]    The present invention also relates to a member, such as a pump or a reservoir, comprising a wiper fluid supply opening equipped with second connecting means configured to cooperate with the first connecting means of the container as described above. 
         [0017]    In the case of the aforesaid first embodiment, the second connecting means of the member may comprise a cylindrical ring mounted at the opening of the member and including a transverse wall that comprises at least one hole or one slit for the passage of liquid. As described above, this transverse wall may be configured to prevent the use of a funnel to supply the member and, in particular, to prevent the engagement of the part of smaller cross section of said funnel in the opening of the container. The member may thus be supplied with fluid only via the container according to the invention. 
         [0018]    Advantageously, a membrane is movably mounted in the ring between a first position in which the membrane bears on the transverse wall in order to close off said at least one hole or said at least one slit and a position in which the membrane is separate from the wall to allow the passage of fluid through said at least one hole or said at least one slit, return means being mounted in the ring to urge the membrane into its first position. 
         [0019]    The ring may comprise at least one hole or one slit configured in order to be traversed by at least one locating projecting element of the first connecting means, which is designed to bear against the membrane with a view to the movement thereof. Said at least one hole or said at least one slit designed to be traversed by said at least one projecting element may be formed in the transverse wall of the ring or around same. 
         [0020]    In the case of the aforesaid second embodiment, the second connecting means of the member may comprise a finger mounted at the opening of the member and configured to cooperate with the bead and to cause the movement thereof from the first to the second position thereof. 
         [0021]    The present invention also relates to a wiper fluid supply device comprising a container and a member as described above. 
         [0022]    The present invention relates, lastly, to a vehicle windshield washing system comprising a wiper fluid supply device of the aforesaid type, means for spraying the windshield with said fluid, and means for wiping the windshield. 
         [0023]    The present invention also relates to a wiper fluid container comprising a fluid dispensing opening equipped with first connecting means configured to cooperate with second connecting means of an opening of a member such as a pump or a reservoir in order to ensure fluid communication between those openings, characterized in that said first connecting means comprise anti-rotation means configured to cooperate with corresponding means of the second means in order to secure said first and second means in rotation. 
         [0024]    The present invention also relates to a wiper fluid container comprising a fluid dispensing opening equipped with first connecting means configured to cooperate with second connecting means of an opening of a member such as a pump or a reservoir in order to ensure fluid communication between those openings, characterized in that said first connecting means comprise locating means configured to cooperate with corresponding means of the second means in order to allow said fluid communication. 
         [0025]    The present invention also relates to a wiper fluid container comprising a fluid dispensing opening equipped with first connecting means configured to cooperate with second connecting means of an opening of a member such as a pump or a reservoir in order to ensure fluid communication between those openings, characterized in that said first connecting means comprise fill-prevention means configured to prevent filling of the container using a funnel, for example. 
         [0026]    The present invention also relates to a member such as a pump or a reservoir, comprising a wiper fluid supply opening equipped with second connecting means configured to cooperate with the first connecting means of the container as described above. 
         [0027]    The present invention also relates to a member such as a pump or a reservoir, comprising a wiper fluid supply opening equipped with second connecting means configured to cooperate with first connecting means of a fluid dispensing opening of a wiper fluid container, to ensure fluid communication between those openings, characterized in that said second connecting means comprise anti-rotation means configured to cooperate with corresponding means of the first means in order to secure said first and second means in rotation. 
         [0028]    The present invention also relates to a member such as a pump or a reservoir, comprising a wiper fluid supply opening equipped with second connecting means configured to cooperate with first connecting means of a fluid dispensing opening of a wiper fluid container, to ensure fluid communication between those openings, characterized in that said second connecting means comprise locating means configured to cooperate with corresponding means of the first means in order to allow said fluid communication. 
         [0029]    The present invention also relates to a member such as a pump or a reservoir, comprising a wiper fluid supply opening equipped with second connecting means configured to cooperate with first connecting means of a fluid dispensing opening of a wiper fluid container, to ensure fluid communication between those openings, characterized in that said second connecting means comprise fill-prevention means configured to prevent filling of the member using a funnel, for example. 
         [0030]    Lastly, the invention proposes a member such as a pump or a reservoir, comprising a wiper fluid supply opening equipped with second connecting means configured to cooperate with first connecting means of a fluid dispensing opening of a wiper fluid container, to ensure fluid communication between those openings, characterized in that said second connecting means comprise an element that can move from a first position closing off the opening of the container to a second position of freeing that opening, these first means being configured to cooperate with the aforesaid first means to cause the movement of the movable member from the first to the second position. 
     
    
     
       DESCRIPTION OF THE FIGURES 
         [0031]    The invention will be better understood and further details, characteristics and advantages of the invention will become apparent on reading the following description given by way of non-limiting example with reference to the appended drawings, in which: 
           [0032]      FIG. 1  is a schematic perspective view of a wiper fluid supply device for a vehicle windshield washing system; 
           [0033]      FIG. 2  is a schematic expanded perspective view of a container and of means for connecting this container to a member according to one embodiment of the invention; 
           [0034]      FIG. 3  is a schematic perspective view of certain components of the connecting means of  FIG. 2 ; 
           [0035]      FIG. 4  is a schematic perspective view, partially transparently showing the container and the connecting means of  FIG. 2 ; 
           [0036]      FIGS. 5 and 6  are schematic perspective views transparently showing the bung of the container of  FIG. 2  and illustrating two different positions of the bung on the container; 
           [0037]      FIGS. 7 and 8  are views corresponding to  FIGS. 3 and 4 , respectively, and show a variant embodiment of the invention; 
           [0038]      FIGS. 9 and 10  are views corresponding to  FIGS. 2 and 4 , respectively, and show a further variant embodiment of the invention; 
           [0039]      FIG. 11  is a schematic perspective view of the container of the variant embodiment of  FIGS. 9 and 10 ; 
           [0040]      FIGS. 12 and 13  are schematic views in axial section of the container and of means for connecting this container to the member, according to the variant embodiment of  FIGS. 9 and 10 ; 
           [0041]      FIG. 14  is a schematic view in axial section of a container and of its connecting means, according to a further variant embodiment of the invention; and 
           [0042]      FIGS. 15 and 16  are schematic perspective views of the bung of the container of  FIG. 14 . 
       
    
    
     DETAILED DESCRIPTION 
       [0043]    Reference is made, first, to  FIG. 1 , which shows a wiper fluid supply device  10  for a vehicle windshield washing system. Conventionally, in addition to the device  10 , this system comprises means for spraying the windshield with the wiper fluid and means for wiping the windshield. 
         [0044]    The device  10  comprises a wiper fluid reservoir  12  connected to a first pump  14  for supplying the washing system with the fluid contained in this reservoir, and which carries a second pump  16  connected to a wiper fluid container  18  for supplying the system with the fluid contained in this container  18 . The fluids in the reservoir  12  and the container  18  may be the same or different. The reservoir  12  comprises, for example, a cleaning liquid, and the container  18  comprises, for example, a fly-removal or antifreeze product. 
         [0045]    The reservoir  12  comprises a filling opening closed by a removable bung  20 . The container  18  has the shape of a bottle in the example shown and comprises a fluid dispensing opening at the bottle neck, which is connected by connecting means according to the invention to an inlet or opening of the pump  16 . 
         [0046]      FIGS. 2 to 6  show a first embodiment of the invention. The container  18  carries at its dispensing opening  22  first connecting means formed by a bung  24 , this bung being designed to cooperate with second connecting means  26  mounted on the pump, at the opening thereof, to allow fluid communication between the container and the pump, i.e. the dispensing of fluid by the container and the supply of the pump with fluid. 
         [0047]    The bung  24  has a general cylindrical shape of longitudinal axis A. At one end, it comprises a cylindrical lip  28  for insertion in the neck of the container  18 , this cylindrical lip including, for example, an integral external annular beading (schematically shown by broken lines  30  in  FIG. 5 ) engaged by elastic snap-fitting in an internal annular groove of the internal wall of the neck, to ensure axial retention (along the axis A) of the bung relative to the container. The integral beading  30  is configured to cooperate by sliding in the groove in order to guide the bung  24  in rotation relative to the container  18 , about the axis A. The bung is thus mounted in rotation about the axis A on the container. 
         [0048]    The bung  24  comprises a first transverse wall  32  at the cylindrical lip  28 . This transverse wall  32  comprises a through-hole  34  that, in this case, is substantially in the shape of a semicircle and is located on a semicircular semi-portion of the wall  32 . The neck of the container also comprises a transverse wall  36  that comprises the aforesaid opening  22 , which, in this case, is substantially in the form of a semicircle and is located on a semicircular semi-portion of the wall  36  ( FIGS. 5 and 6 ). 
         [0049]    As may be seen in  FIGS. 5 and 6 , the bung  24  can be moved in rotation (arrow  38 ) relative to the container  18 , between a position in which the hole  34  in the wall of the bung is not aligned with the opening  22 , which is then closed off by the wall  32  of the bung, and a position in which the hole  34  and the opening  22  are aligned, which allows the dispensing of the fluid contained in the container via the opening  22  thereof (arrows  40 ). 
         [0050]    The bung  24  comprises a second transverse wall  42  at its end opposite the lip  28 . This transverse wall  42  comprises an annular row of radial (relative to the axis A) slits  44 , which are evenly distributed about the axis A. These slits  44  are in fluid communication with the hole  34  in the bung. 
         [0051]    The bung  24  furthermore comprises an annular row of longitudinal fingers  46  projecting from the wall  42  and extending from this wall, of the side opposite the lip  28 . These fingers  46  are parallel with one another and with the axis A. They each have a substantially parallelepipedal shape and a rectangular shape in cross section. In this case they are four in number and are evenly distributed about the axis A, in the vicinity of the external peripheral edge of the wall  42 . 
         [0052]    In the example shown, the means  26  for connecting to the opening of the pump comprise four elements: a ring  50 , a membrane  52  mounted movably in the ring  50 , a spring  54  mounted in the ring and forming return means bearing against the membrane, and an annulus  56  for retaining the membrane  52  and the spring  54  in the ring. 
         [0053]    The ring  50 , which can be seen better in  FIG. 3 , has a cylindrical general shape and comprises a transverse wall  58  located substantially in the middle of the ring and delimiting internal cylindrical recesses of the ring, respectively an upper  60  and a lower  62  ( FIGS. 3 and 4 ) recess. 
         [0054]    The transverse wall  58  comprises an annular row of radial (relative to the longitudinal axis of the ring, which, in the assembled position, merges with the axis A) slits  64 , which are evenly distributed about this longitudinal axis. These slits  64  are through-slits and ensure fluid communication between the recesses  60  and  62  of the ring  50 . 
         [0055]    The wall  58  further comprises an annular row of holes  66  through which the fingers  46  of the bung pass. These holes  66  each have a substantially rectangular shape and dimensions that are slightly larger than the transverse dimensions of the fingers  46  of the bung. In this case, they are four in number and are evenly distributed about the axis A, in the vicinity of the external peripheral edge of the wall  58 . 
         [0056]    The bung  24  is designed to be engaged in the upper recess  60  of the ring  50  and its fingers  46  are designed to pass through the holes  66  in the wall  58  of the ring upon such engagement. To that end, the bung  24  must be pre-aligned on the ring and positioned at an angle about the axis A, such that its fingers  46  are aligned with the holes  66  (arrow  68 ). 
         [0057]    The membrane  52  is substantially circular and is mounted in the lower recess  62  of the ring  50 , and intercalated between the wall  58  of the ring and the spring  54 . The membrane  52  can move in translation along the axis A in this recess  62 , between a first position in which it bears axially against the wall  58  and closes off the slits  64  in said wall, to prevent the supply of fluid to the pump, and a second position in which it is at a distance axially from the wall  58  and leaves the slits  64  free. The movement of the membrane  52  from the first to the second position is caused by axial bearing of the fingers  46  against the upper face of the membrane when these fingers pass through the holes  66  in the wall  58  of the ring, as shown in  FIG. 4 . 
         [0058]    The membrane  52  comprises, at its external periphery, axial notches  70  shown schematically by broken lines in  FIG. 4 . These notches  70  are located opposite a peripheral part of the wall  58  of the ring that does not have slits, i.e. is not traversed by the aforesaid slits  64 . Thus, when the membrane  52  is in its first position, it closes off the slits  64  completely and the fluid cannot pass through them. When the membrane  52  is in its second position, the notches  70  define, together with the internal cylindrical surface of the ring  50 , spaces for the passage of the fluid, which has passed through the slits  64  in the wall  58 . 
         [0059]    The annulus  56  is fixed to the lower end of the ring  50  and holds the spring  54  so that it bears against the membrane  52 . In the assembled position, and when the membrane  52  is in the aforesaid first position, the spring  54  is slightly prestressed between the membrane and the annulus  56 , the force exerted by the spring on the membrane being sufficient to ensure a seal between the wall  58  and the membrane  52 . 
         [0060]    The container  18  may be connected to the pump as follows: the bung  24  is preassembled on the neck of the container containing the wiper fluid. Prior to first use, the transverse wall  58  of the bung may be covered with a capsule to guarantee that the container has never been used and this capsule has to be removed prior to connecting the container to the pump. The connecting means  26  are also preassembled by appropriate means in or on the opening of the pump. The container  18  is arranged above the connecting means  26  and aligned thereon, as shown in  FIG. 2 , the fingers  46  of the bung  24  being aligned axially on the holes  66  in the ring  50  of the connecting means  26 . The container is then moved by translation along the axis A toward the ring  50 , until the bung engages in the upper recess  60  of the ring and its fingers  46  pass through the holes  66  in the wall  58  of the ring. When passing through these holes  66 , the fingers  46  bear against the membrane  52  and move it in translation along the axis A to separate it from the wall  58 . The opening of the pump is then in fluid communication with the upper recess  60  of the ring, via the notches  70  of the membrane and the slits  64  in the wall  58  of the ring. However, this is not sufficient to ensure fluid communication between the pump and the container  18  because the opening of the latter is still closed off by the bung  24 . The container  18  has to be moved in rotation about the axis A relative to the bung  24  and the connecting means  26 . The fingers  46  of the bung cooperate with the ring  50  to form anti-rotation means rendering the bung secure in rotation with the ring, while these fingers are engaged in the holes  66  in the wall  58  of the ring. The container  18  is thus turned until the hole  34  in the bung is in fluid communication with the opening  22  of the container, which, in the example shown, represents a movement of the bung substantially through one half-turn about the axis A ( FIGS. 5 and 6 ). Fluid communication between the openings of the container and of the pump is then established. 
         [0061]    In the embodiment described above, the fingers  46  of the bung  24  form, in particular, together with complementary means of the connecting means  26 , anti-rotation means and locating means preventing the supply to the pump in the event of the use of a bung without such fingers. 
         [0062]    The variant embodiment of  FIGS. 7 and 8  differs from the embodiment described above notably in that the anti-rotation and locating means of the bung  124  are formed by fingers of different forms or, alternatively, curved wails  146 , the radius of curvature of which is centered on the axis A. These walls  146  are in this case two in number. They extend along the axis A on the side opposite the aforesaid lip  28  and have an external diameter substantially equal to the external diameter of the bung. They thus extend along the axis A in the extension of the bung. They are separated from one another by circumferential spaces  148 . 
         [0063]    The ring  150  differs from that  50  of the preceding embodiment notably in terms of the form and the position of the passage holes of the anti-rotation means (walls  146 ), the free ends of which are designed to bear against the membrane  152  mounted in the ring with a view to the movement thereof. 
         [0064]    The transverse wall  158  of the ring  150 , which includes the radial slits  164 , is connected at its external periphery to a cylindrical skirt  174  that internally defines the upper cylindrical recess of the ring, in which the bung  124  is designed to engage. This skirt  174  is coaxial to the cylindrical wall  175  of the ring and extends inside same and at a distance therefrom. It is connected to the wall  175  of the ring by two diametrically opposed longitudinal webs  176 . The wall  175  and the skirt  174  of the ring define between them two circumferential spaces which are separated from one another by the webs  176  and in which the walls  146  of the bung are designed to engage. When the walls  146  of the bung are engaged in these spaces, the circumferential ends thereof may abut against the webs, in such a manner as to form anti-rotation means for the bung relative to the ring. 
         [0065]    The way in which this variant functions may be similar to that of the embodiment described above. 
         [0066]    The variant embodiment of  FIGS. 9 to 13  differs from the preceding variant notably in terms of the assembly of the bung  224  on the neck of the container  218 . 
         [0067]    The neck of the container  218  comprises a cylindrical wall, the free end of which is connected to the end of largest diameter of a frustoconical wall  278  of which the end of smallest diameter is connected to a solid transverse wall  236  ( FIG. 11 ). The frustoconical wall  278  comprises an annular row of through-holes that form the dispensing opening  222  of the container. 
         [0068]    The cylindrical wall of the neck of the container comprises, on its external surface, two diametrically opposed U-grooves  280 , only one of which can be seen in  FIG. 10 . Each groove  280  comprises two circumferential parts, a lower part  281  and an upper part  282 , respectively, which extend about the axis A. These parts  281 ,  282  are substantially identical and extend over the same angular range about the axis A. They are arranged one above the other, and one of the circumferential ends of one part is connected to the adjacent circumferential end of the other part ( FIG. 10 ). 
         [0069]    The bung  224  differs from the bung  124  of the preceding variant notably in that the end thereof that is located on the container side comprises a frustoconical wall  284 , the end of largest diameter of which is connected to a cylindrical lip  286  for assembly on the neck of the container ( FIGS. 12 and 13 ). In the assembled position, in which the opening  222  of the container is closed ( FIG. 12 ), the lip  286  surrounds the cylindrical wall of the neck and the frustoconical wall  284  surrounds the frustoconical wall  278  of the neck. 
         [0070]    The cylindrical lip  286  of the bung  224  comprises two diametrically opposed studs  288  that project from the internal surface of the bung and are each engaged slideably in one of the grooves  280  of the neck ( FIG. 10 ). Each stud  288  can move in the corresponding groove, for example from the part  282  of this groove as far as the part  281  thereof. This movement is caused by a rotation of the container  218  relative to the bung  224 , about the axis A, and a translation of the container along the axis A relative to the bung. In the case where the studs  288  are located at the free ends of the upper parts  282  of the grooves, a rotation of the container relative to the bung is necessary in order to move the studs  288  as far as the opposite ends of the parts  282 . A translation of the container relative to the bung, on the side opposite the pump, makes it possible to move the studs from the part  282  to the part  281  of each groove  280 . A further rotation of the container relative to the bung, in the opposite direction from the rotation effected previously, makes it possible to move the studs  288  as far as the free ends of the parts  281  of the grooves. 
         [0071]    The bung  224  is designed in order that, when the studs are in the lower parts  281  of the grooves  280 , the frustoconical walls  278  and  284  of the neck and of the bung bear against one another and the holes  222  of the wall  278  are thus closed off by the wall  284  ( FIG. 12 ), and in order that, when the studs are in the upper parts  282  of the grooves, the walls  278  and  284  are at a distance from one another and the fluid contained in the container  218  is able to be dispensed via the holes  222  ( FIG. 13 —arrows  290 ). 
         [0072]    The bung  224  and the neck of the container are thus connected together by a bayonet-type link. In a variant, this link, which allows a rotation and a translation of the bung on the neck, could be of the threaded type, the bung including a thread screwed into a thread of complementary form of the neck. 
         [0073]    As explained above, the simple engagement of the bung  224  in the connecting means of the pump, which makes it possible to move the membrane  252  from its first to its second position, does not on its own ensure fluid communication between the openings of the container and of the pump. Prior to connection of the container to the pump, the bung is in the position shown in  FIG. 12 , in which the holes  222  of the container are closed off. After engagement of the bung in the connecting means of the pump, the container is turned about the axis A to bring the studs  288  of the free ends of the parts  282  of the grooves  280  to their opposite ends (arrows  292 ). The container is then moved by translation on the side opposite the pump in order that the studs pass into the lower parts  281  of the grooves (arrow  294 ). Fluid communication between the openings of the container and of the pump is thus established. It is possible to keep the container in this open position by turning the container relative to the bung such that the studs  288  move as far as the free ends of the parts  280  of the grooves. 
         [0074]    Reference will now be made to  FIGS. 14 to 16 , which show a further variant embodiment of the invention in which the bung  324  comprises a bead  396  enclosed in a cage  398  affixed to the bung. 
         [0075]    The bung  324  is in this case screwed onto the neck of the container  318  and can be affixed permanently on this neck. The bung comprises a transverse wall  400  that includes a central hole  402 , this central hole having a diameter smaller than that of the bead and being shaped to form a seat for this bead  396 . The bead  396  can be moved inside its cage  398  between a position in which it bears against the seat and closes off the hole  402  and a position in which it is at a distance from the seat and thus leaves free the hole  402 , which then is in communication with the opening  322  of the container. Return means, such as a spring  404 , are mounted in the cage  390  and urge the bead  396  into the position closing off the hole  402 . 
         [0076]    The bung  324  further comprises a cylindrical lip  406  for engagement in the opening of a reservoir  316 . As schematically shown in  FIG. 14 , this reservoir  316  carries a finger  408  designed to bear against the bead  396  and to move it at the time of said engagement. In the engaged position, the finger  408  is engaged in the lip  406  and its free end bears against the bead  396  and moves it away from its seat. The fluid contained in the container  318  is then able to pass through the hole  402  of the bung as far as the reservoir  316 . 
         [0077]    In this variant, a single movement in translation of the container relative to the reservoir, until the bung engages in the opening of the reservoir, is sufficient to establish fluid communication between the container and the reservoir. 
         [0078]    The free end of the cylindrical lip  406  of the bung may be covered by a capsule  410  of the aforesaid type, designed to be torn away by the finger  408  at the time of assembly of the container.