| 摘要 |
A trigger actuated pump sprayer has a reduced number of parts to render it low cost without compromising any pump function. A combined inlet/discharge valve unit is located in a liquid passageway leading from the inlet end of the pump body. The unit has a pair of axially spaced apart frusto-conical valve skirts diverging outwardly from the common stem on which the valve skirts are provided. The valve skirts straddle a pump chamber port, and the unit may be mounted in place by a dip tube retainer or the retainer may be eliminated with the unit coupled to the pump body itself, fixed in the passageway directly by the dip tube, or made integral with the unit. The trigger actuator has an integral piston return spring, the actuator being fixed to the pump body, and the trigger lever of the actuator being coupled to the pump piston.
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