Assembly for packaging and dispensing liquid

An assembly for packaging and dispensing liquid, the assembly comprising:

• a receptacle for containing a supply of liquid;
• and
• a refillable unit configured to be disposed in a separable manner on the receptacle, the refillable unit comprising:
• a storage chamber for containing the liquid and capable of being put into fluid communication with the receptacle in order to be filled therefrom when the refillable unit is placed on the receptacle;
• and
• a pump having a pump chamber that is distinct from the storage chamber and being configured for taking liquid from the receptacle when the refillable unit is placed thereon, and for taking liquid from the storage chamber when the refillable unit is separate from the receptacle,
• wherein the refillable unit comprises a body and a piston that is movable relative to the body and that co-operates therewith to define a storage chamber of variable volume, the storage chamber being formed under the piston when the refillable unit is observed in the head-up position, the refillable unit comprising a moving assembly that is movable relative to the body, the moving assembly comprising the piston and a pump comprising a duct, with the piston being secured around said duct.

A refillable unit having a longitudinal axis and configured to be disposed in a separable manner on a receptacle, the refillable unit comprising:

• a storage chamber for containing liquid and capable of being put into fluid communication with the receptacle to be filled therefrom when the refillable unit is placed on the receptacle;
• and
• a pump having a pump chamber that is distinct from the storage chamber and being configured for taking liquid from the receptacle without taking liquid from the storage chamber when the refillable unit is placed thereon, and for taking liquid from the storage chamber when the refillable unit is separate from the receptacle,
• the refillable unit comprising a body and a piston that is movable relative to the body along the longitudinal axis of the refillable unit and the receptacle, the piston being of annular shape and extending all around a part of the pump.

A refillable unit configured to be disposed in separable manner on a receptacle, the refillable unit comprising:

• a storage chamber for containing liquid and capable of being put into fluid communication with the receptacle in order to be filled therefrom when the refillable unit is placed on the receptacle;
• and
• a pump having a pump chamber that is distinct from the storage chamber and being configured for taking liquid from the receptacle without taking liquid from the storage chamber when the refillable unit is placed on the receptacle, and for taking liquid from the storage chamber when the refillable unit is separate from the receptacle,
• wherein the refillable unit comprises a body and a piston that is movable relative to the body and that co-operates therewith to define a storage chamber of variable volume, the storage chamber is situated beneath the piston when the refillable unit is observed in the head-up position and wherein the pump comprises a duct, the piston being secured around said duct, and wherein the piston includes a bottom face that is set back from a bottom end of the duct, said duct including a portion that extends the duct downward beneath the piston.