Abstract: A device for spraying a single dose of a fluid in divided form includes a cylindrical tank (1) containing the dose of fluid, a piston (2) sliding in the cylindrical tank (1), a pusher for the piston (2), and outlet passage (5, 6) capable of communicating with the cylindrical tank (1). The piston (2) is displaceable relative to the pusher between a storage position, in which it prevents communication between the outlet passage (5, 6) and the cylindrical tank (1), and an actuation position, in which it puts the outlet passage (5, 6) into communication with the cylindrical tank (1). According to one aspect of the invention, the piston (2) is maintained in its storage position by wedging.

Abstract: A closure system for a receptacle having a neck in which an opening is formed and provided with outwardly projecting external threads each extending between a first end further from the opening and a second end closer to the opening, the system comprising a cap having a side wall that surrounds the neck and that fits substantially snugly over the shape of the external threads thereof. The cap is made of a material that is elastically deformable, and at least some of the threads of the neck are spaced apart in pairs by a circumferential distance around the neck that decreases progressively between the first and second ends of the threads.

Abstract: A compressed gas device is disclosed for spraying a single dose of a fluid substance in finely divided form. The device comprises a tank containing the single dose having an inlet orifice for compressed gas, and an outlet orifice. The device further comprises a manually actuated gas pump having a gas supply communicating with the inlet orifice of the tank via an intermediate channel. The intermediate channel has a length of narrowed section that is closed in a sealed manner by a plug which is held in the narrowed section so that when the pressure of the gas supplied by the pump reaches a predetermined threshold, the plug is expelled towards the tank to open the intermediate channel. The device includes an abutment element to limit the displacement of the plug towards the outlet orifice of the tank of substance. The abutment element is constructed to guarantee that the compressed air can continue to floe through the outlet orifice when the plug is in its abutment position.

Abstract: An elongate push-element (2) having a nozzle integrally formed with an external part (20) thereof, so that the nozzle cannot be forcibly ejected from a container which expels liquid under pressure. An opening (21a) at one end of an internal channel (21) may be slidably fitted on a valve stem (4) of a container (1), so that the push-element may be used with a variety of valve types.

Abstract: The valve has a variable volume chamber (11) of annular section between an outer tubular body (1) and a coaxial member (4). An annular piston (5) is free to move axially to vary the volume of the chamber under the combined forces of a return spring (6) and the pressure in the container. A controllable plunger (7) is subject to the force of a return spring (8) and to control force from a user. In the rest position the plunger leaves the variable volume chamber in communication with the interior of the container, and thus with the substance to be dispensed. When pressed against its return spring (8), the plunger isolates the variable volume chamber from the interior of the container and puts the variable volume chamber in communication with the outside. A pressure difference thus appears across the piston (5) and the piston moves along the variable chamber against the force of its return spring (6) to dispense a measured volume of substance.

Abstract: A push button (2) is slidably and rotatably mounted in a sleeve (1). The push button is fitted to the valve-operating rod (28) of an aerosol valve (25) fitted in the opening of an aerosol can (26) by means of a dish (22). The inside edge of the dish is crimped to the valve and its outside edge is crimped to the edges of the can. The sleeve has an internal collar (3) which is snap fitted over the neck where the inside edge of the dish is crimped to the valve. Since the sleeve thus engages the valve rather than the can, sleeve size and shape is independent of the size and shape of the can (in so far as there are relatively few valve sizes used in a wide range of can shapes and sizes). Further, by crimping the neck (22c) so that its periphery is polygonal, the sleeve can be prevented from rotating. A safety push button requiring both a turning action and an axial displacement for operation, can thus readily be operated with one hand since there is no need to use the other hand to stop the sleeve from rotating.

Abstract: Part (14) of stem (4) which extends through opening (31) of lower basket (12) is provided with ribs (17) for having an easier passage of material, either during initial filling or during normal use. The lower part of valve body (1) is provided with openings (19), the number of which is different from the number of ribs (17).