| 摘要 |
1,158,268. Spray-producers. UNION CARBIDE CORP. 21 Oct., 1966 [21 Oct., 1965], No. 47226/66. Heading B2F. A device suitable for intermittently spraying a liquid or a liquid/solid mixture 28 from a container 26 comprises a propellant container 12, a valve mechanism .14 adapted to adjustably control the flow of propellant from its container through an aperture 36 into a chamber 18, and a diaphragm 20 which supports the valve spindle 22 of a valve which normally closes a channel 24 but which is retracted when the pressure in the chamber builds up to a suitable value so as to provide communication between the chamber and the channel, Fig. 2 (not shown). Propellant admitted to the channel 24 is discharged through an orifice 42 and entrains liquid &c. up a riser tube 30. The propellant is preferably a liquefied gas such as a fluorinated hydrocarbon. The valve mechanism 14, Fig. 3 (not shown) includes a curved brass disc (34) mounted between an inner support member (38) and a housing member (16). Screw means are provided to reduce the distance between the top of the member (38) and the housing (16) so as to compress the disc (34) and adjust the ratio of flow of the propellant past the disc and through the aperture 36. If the disc is part spherical a groove or slot may be formed in its periphery. In the embodiment of Fig. 5 (not shown) the spray material (liquid) and the propellant are stored in a common container and a needle valve (76) mounted on a diaphragm (76) cooperates with a resilient seating (78) to control the discharge outlet. |
