| 摘要 |
This disclosure is directed to a spray nozzle device of the general type in which liquid or air, or a combination thereof, from a source under superatmospheric pressure, are supplied to the nozzle and discharged therefrom to an area of application under the direction and control of an operator. The nozzle of the device has an internal duct arrangement by which liquid agents, such as paint, liquid detergent, insecticide, and the like, which are to be applied to an area, are drawn from a container by the Venturi effect produced by the liquid or air from the source during its passing through the nozzle. A manually operable valve is connected between the nozzle and container and is adjustable by progressive uninterrupted minute increments of change in the effective size of the valve opening for controlling the education of the liquid agent from the container.
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