| 摘要 |
A pump-action nozzle is described. The nozzle includes an internal chamber and an outlet through which fluid is dispensed and ejected from the device. The outlet has an outlet valve configured to open and permit fluid to be dispensed from the chamber only when the pressure therein exceeds a predetermined minimum threshold pressure. The nozzle also includes an inlet through which fluid can be drawn into the chamber. The inlet has a valve configured to open and permit fluid to be drawn into the chamber only when the pressure within the chamber falls below the external pressure. The body of the device includes a base portion and a housing portion, together defining the internal chamber of the device and being slidably mounted to one another such that said housing portion can be slid towards the base portion to reduce the internal volume of the chamber.
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