Patent ID: 8469291

Claim:
A sprayer comprising: a housing, said housing having a piston bore; a piston reciprocally mounted within said piston bore; a flow passage within the housing for the passage of liquid from a passage inlet to a passage outlet; an actuator operable to reciprocate the piston within the piston bore between a vacuum stroke that is configured and adapted to create reduced pressure in the piston bore and a compression stroke that is configured and adapted to create increased pressure in the piston bore; a valve assembly within the flow passage for controlling the flow of liquid through the flow passage upon operation of the actuator, said valve assembly further comprising a check valve and a priming valve; the check valve comprising a frusto-conical component; a valve case formed separately from and operatively connected to said housing, a valve seat for the check valve formed within the valve case; and a closure that is configured and adapted to mount the sprayer to a container, said closure formed separately from said housing and formed separately from and operatively connected to said valve case.