Patent ID: 7743949

Claim:
An assembly for packaging and dispensing liquid, the assembly comprising: a receptacle for containing a supply of liquid; and a refillable unit having a longitudinal axis and 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 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.