Patent ID: 6641003
Filing Date: 2003-11-04
Classification: B05B

Abstract:
A manually operated trigger sprayer comprising:a sprayer housing having a liquid outlet opening and a liquid inlet opening in the sprayer housing, a pump chamber in the sprayer housing, a liquid discharge passage extending through the sprayer housing from the pump chamber to the liquid outlet opening and a liquid supply passage extending through the sprayer housing from the liquid inlet opening to the pump chamber; a pump piston mounted in the pump chamber for reciprocating movement between charge and discharge positions of the pump piston in the pump chamber; a unitary valve member in the sprayer housing having an inlet valve element and an outlet valve element, the inlet valve element being positioned in the liquid supply passage and being movable between a closed position closing the liquid supply passage and an opened position opening the liquid supply passage in response to the pump piston moving to the discharge and charge positions, respectively, and the outlet valve element being positioned in the liquid discharge passage and being movable between a closed position closing the liquid discharge passage and an opened position opening the liquid discharge passage in response to the pump piston moving to the charge and discharge positions, respectively; the pump chamber having an inlet passage that communicates the pump chamber with the liquid supply passage and the pump chamber having an outlet passage that communicates the pump chamber with the liquid discharge passage; and the valve member is positioned in the sprayer housing between the pump chamber inlet and outlet passages.