| 摘要 |
A trigger actuated pump sprayer has a discharge valve assembly located in the discharge barrel of the pump body which includes a filler for reducing the volume of the discharge barrel thereby displacing the air therein whereupon the strokes-to-prime ratio of the pump required during initial pumping for discharging pressurized liquid along the barrel and through the orifice at a nozzle end thereof, is improved. Also the discharge valve assembly may be shiftable along the length of the discharge barrel in response to pressure and return strokes during pumping, a downstream end of the assembly engaging a spin mechanics element at the nozzle end to therewith define a variable volume suction chamber in communication with the discharge orifice for withdrawing product therefrom during each pumping suction stroke.
|
