| 摘要 |
The atomizer valve assembly is constructed and arranged so that upon depressing an actuator thereof, a metered amount of liquid is first placed under pressure followed by the opening of a valve to dispense pressurized liquid from a nozzle in the actuator in a fine spray or puff of liquid. The assembly includes a cylinder with a plunger therein having a lower skirt portion engaging the interior of the cylinder. The plunger is received within a piston having a similar shape as the plunger. A dispensing spring is situated between the skirt portions of the plunger and the piston. A needle valve member having a stem portion and a disc-shaped bottom portion is positioned beneath the plunger with the stem portion extending into the plunger. At least one valve is formed between the needle valve member and the plunger and a metering chamber with a spring therein is defined between the disc-shaped bottom portion and the bottom of the cylinder. Depression of the actuator places the liquid in the metering chamber under pressure, followed by relative movement between the needle valve member and the plunger so as to open up the valve(s) between the needle valve member and the plunger thereby to allow the pressurized liquid in the metering chamber to flow out of the nozzle in the actuator in a fine spray or puff of liquid.
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