An aerosol valve actuator has a body in which a forwardly open cavity is formed and which contains in its forward end a reciprocating piston in which a discharge orifice is formed, a rod or probe extending from the closed back end of the cavity forwardly and having a front end which normally closes the discharge orifice when the piston is at a backward position, but opens this orifice when the piston reciprocates forwardly to leave the front end of the rod or probe. A hole opens transversely through the body and into the back end portion of the cavity and this hole is proportioned for a press fit on the usual tubular valve stem through which a packaged pressurized product is dispensed when the stem is depressed. The actuator is used for depressing the stem by finger pressure. The front end of the body has a cap or retainer screwed on it to hold the piston normally backwardly against the front end of the rod, unscrewing of this cap freeing the piston for forward movement and orifice-opening action. When the cap is unscrewed to place the actuator in its ready condition, a coil spring positioned between the cap and the piston biases the piston backwardly so that the orifice remains normally closed, the orifice opening when the actuator receives the pressurized product which then applies its pressure against the piston to push it forwardly to the limit determined by the extent with which the front cap is unscrewed. Thus, the cap acts as a governor controlling the extent the discharged valve opens and, therefore, the nature of the discharge of the pressurized product. This governor is positioned on the front end of the actuator.
An aerosol valve actuator, which can also be used for pump-type fluid product dispensing packages, is made from only two molded parts which are screwed together. By screwing and unscrewing the two parts, sprays ranging from a mist to a solid stream, as well as a positive shut-off, can be obtained.
A child-resistant nozzle connectable to a spray dispensing device. The child-resistant nozzle assembly of the present invention includes a nozzle having a slot in the upstream end for receipt of a lug connected to the pump body. The lug may be depressed by the fingers of the user to selectively engage or disengage the slot in the nozzle. When the lug is engaged in the slot in the nozzle, no liquids can leak or be dispensed from the nozzle.
A spray head is intended for attachment to a spray can having a pressure container, a control valve and an outflow channel for dispensing material, such as shaving gel, which expands after dispensing. The spray head has a flow channel that receives a biassed valve near the spray head outlet. A material expansion absorption arrangement is in communication with flow channel and interacts with a control part that controls spray head operation. The threshold pressure of the biassed valve is higher than the threshold pressure needed for operating the material expansion absorption arrangement. After dispensing a quantity of material, the material expansion absorption arrangement can absorb expanding residual material so that on subsequent use, the material expansion absorption arrangement is returned first to the initial position before the control valve of the spray can is opened. A spray can with such a spray head is also described.
An actuation device is provided for actuating a dispensing member and for dispensing a product contained with the dispensing member. The actuation device includes an inlet orifice, a dispensing orifice, a passage, a suction orifice and a vacuum mechanism. The inlet orifice is placed in flow communication with the dispensing member. The passage extends from the inlet orifice to the dispensing orifice. The suction orifice, which is distinct from the inlet orifice, flow communicates with the passage. The vacuum mechanism includes a variable-volume chamber having a collecting region and a chamber orifice. The variable-volume chamber is entirely contained within the actuation device. The chamber orifice is in flow communication with the suction orifice. At least a portion of the collecting region is below the level of the chamber orifice. The vacuum mechanism creates a partial vacuum inside the passage so that at least some of any residual product residing in the passage is conveyed, via the suction orifice and the chamber orifice, into the collecting region of the variable-volume chamber.
The invention relates to a spray head (100) for a fluid dispenser for dispensing a fluid, the spray head being provided with an expulsion channel (1) opening out in a spray orifice (9), and with a moving closure member (10) mounted to move between a closed position, in which it closes said orifice (9), and a spray position, said closure member (10) being urged resiliently towards its closed position, and being displaced towards its spray position by the pressure of the fluid, the spray head being provided with a swirl chamber (20) of variable volume, the volume of said swirl chamber (20) being at its maximum when the closure member (10) is in the spray position, and being substantially zero when said closure member is in the closed position, said spray head being characterized in that said closure member (10) is provided with the spray orifice (9) and with swirl channels (30) which, when the closure member is in the spray position, connect said expulsion channel (1) to said swirl chamber (20), the volume and the geometrical configuration of said channels (30) remaining unchanged whatever the position of the closure member (10).
