Pump dispenser having an improved discharge valve

A manual pump dispenser, comprising, a pump body having a pump piston reciprocable between pressure and return strokes in a pump cylinder against the bias of a piston return spring to define with said cylinder a variable volume pump chamber, said pump body having an inlet valve for the inletting of a liquid product to said chamber upon the piston return strokes, a discharge valve snap-fitted to the pump body for the outletting of the liquid product from the chamber upon the piston pressure strokes through a discharge passage of a plunger head mounted to the piston, the discharge valve being formed of an elastomer material and comprising a conically-shaped valve element at one end sloping outwardly toward the discharge passage, the discharge valve having a non-reentrant element at an opposite end thereof, a transverse perforate support web within the pump body, the support web having an opening though which the non-reentrant element extends for snap-fit engagement, the pump body having an annular valve with which an outer surface of the valve element engages in a discharge valve closing position, a portion of the valve element disengaging the valve seat to open flow of the liquid product from the chamber through a discharge port in the support wall and through the discharge passage in a discharge valve open position.