The sprayer pump sprayer pump may be mounted on a container of product to be dispensed and sprayer pump may be mounted on a container of product líquido being dismissed

摘要

The pump sprayer comprises a pump housing including a coaxial piston and cylinder assembly relatively reciprocable to define a variable volume pump chamber, a valve controlled fluid inlet passage leading into the chamber for communication with a source of liquid product to be dispensed, and a valve controlled fluid discharge passage leading away from the chamber. The discharge passage is stationary and includes a valve seat member fixed to the housing. The assembly comprises a spring biased reciprocable plunger in sliding sealing engagement with the valve seat member. The plunger includes a pump cylinder and an insert mounted within the housing. The assembly further comprises a spring biased piston in sealing engagement with the insert. The piston has a free end in engagement with the valve seat member in a discharge closed position and is mounted to slide within the cylinder between the closed position and a discharge open position in which the free end disengages the valve seat member.