The container stopper comprises a cylindrical part to be engaged in the neck of a container and has a groove which extends peripherally on at least one part of the cylindrical part circumference. Two channels separated from each other, extend in the cylindrical part of the stopper and open into the groove through orifices respectively spaced from each other in the groove peripheral direction. A diaphragm of elastomeric material closely matches the shape of the cylindrical part and the groove surface covering the orifices of the two channels. The diaphragm forms a shut-off valve that by its elastic deformation, allows a fluid substance contained in the container to flow from inside the container outwards, as well as from outside into the said container.
A device for dispensing fluid including a pressure-operated reservoir and a dose-metering head communicating with the reservoir to permit at least partial flow of the fluid to at least one outlet opening, the head including a fixed body and a membrane which, when at rest, comes into surface contact with at least a part of the fixed body on which the membrane is tightly mounted, the outlet opening being provided on an external element, wherein tightening of the membrane, during pressure operation of the reservoir, permits a flow from the reservoir via a peripheral space delimited by the membrane and by the part of the fixed body and which forms a passage for the fluid to the outlet opening, and, in the absence of pressure on the reservoir, to permit the membrane to occupy an equilibrium position in which the membrane is in surface contact with the part of the fixed body, by the intermediary of a thin film of fluid, essentially closing off the passage for the fluid, which essentially tightens the communication between the outlet opening and the reservoir.
A dispensing container is formed having a housing with an opening at the top and defining an internal cavity. A wheel is rotatably attached to the housing and includes an arm which extends from the wheel and is dimensioned to cover the opening. The wheel with the extending arm is adapted to pivot away from the opening when the wheel is rotated, thereby allowing one to dispense the contents present in the container.
