Abstract: Provided is a device for metering and dispensing a liquid or viscous product. The device includes an inlet opening at a lower longitudinal end for the passage of the product from a container, an outlet opening at an upper longitudinal end for the dispensing of the product from the device, and a main chamber accommodating a piston that moves lengthwise with respect to the main chamber.

Abstract: The present invention relates to a pump for metering and dispensing a liquid or viscous product. This pump (1) is characterized in that the separation chamber (9a) between the main chamber (9) and the piston (10), with said piston (10) impelling the product toward the outlet opening (7) of the pump (1), is sealed with respect to the flow of the product, the latter not passing through said separation chamber, and in that the means (16) for returning the piston to its position closing the outlet opening (7) may be accommodated in this separation chamber (9a). Application to the field of dispensing a liquid or viscous product from a container, especially to spraying of said product.

Abstract: The diffuser (1) includes a receptacle which contains the odorous substance to be diffused in liquid form or the like, and which is closed by a diffusion membrane (3c), and means for rotating the receptacle about itself. The receptacle includes a plurality of compartments which enable the weight of the odorous substance to be distributed over the periphery of the axis of rotation (DD) of the receptacle. In a preferred embodiment, the receptacle includes at least one annular-type housing (3) which is centered on the axis of rotation of the receptacle, and which is partitioned into a plurality of identical compartments (5a, 5b, 5c, 5d, 5e, 5f).

Abstract: The dynamic diffuser for a naturally diffusing liquid substance such as a perfume comprises a receptacle for said substance and having a vertical flank which is closed by a membrane that is impermeable to liquid but permeable to gas. All or part of the membrane is caused to come into contact with said substance, at least intermittently, by revolving the receptacle about a horizontal axis. Air-flow generating means, e.g. impeller blades, serve to cause air to flow over the outside of the membrane.