Patent ID: 7306122

Claim:
A manually operated, liquid dispensing tripper sprayer comprising: a sprayer housing; a liquid pump on the sprayer housing, the liquid pump having a center axis; an air vent on the sprayer housing, the air vent having a center axis, the air vent center axis being coaxial with the liquid pump center axis; a liquid discharge passage extending through the sprayer housing and communicating with the liquid pump for directing liquid through the sprayer housing and discharging the liquid from the sprayer housing on operation of the liquid pump; a trigger mounted on the sprayer housing for movement of the trigger relative to the sprayer housing, the trigger being operatively connected to the liquid pump for operation of the liquid pump in response to movement of the trigger; the liquid pump having a pump chamber with a cylindrical interior surface, and a pump piston mounted in the pump chamber for reciprocating movement relative to the pump chamber; the air vent having a vent chamber with a cylindrical interior surface, and a vent piston mounted in the vent chamber for reciprocating movement relative to the vent chamber; and the pump piston being positioned inside the vent piston.