TRIGGER OPERATED PUMP TYPE SPRAYER AND DISCHARGE VALVE ASSEMBLY THEREOF

摘要

PROBLEM TO BE SOLVED: To obtain dripping preventing characteristics for preventing a liquid product from dripping to a discharge orifice after the closing of a discharge valve and characteristics contracting the vol. of the discharge passage connected to the discharge orifice from a pump chamber to facilitate the priming of a pump. SOLUTION: A trigger operated pump type sprayer has the discharge valve assembly 54 arranged to the discharge barrel of a pump main body 21 improved in the process and priming water ratio of its pump excluding the air in the discharge valve 41 by the packed material for contracting the vol. of the barrel and required during initial suction and discharge for discharging a pressurized liquid product along the barrel or through the orifice 44 of a nozzle 42. The discharge valve assembly can be moved along the total length of the discharge barrel corresponding to a pressure process and a return process during suction and discharge and the downstream end of the assembly is engaged with a rotary mechanism member 48 at the end of the nozzle to determine the variable vol. suction chamber communicating with the discharge orifice and the liquid product is drawn during a pump suction process.