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US 6,641,003 B1Granted
Low cost trigger sprayer with double valve element
AssigneeContinental AFA Dispensing Company
InventorsDonald D. Foster, Philip L. Nelson
Life of this patent
Estimating the term…
Abstract
A trigger sprayer construction is provided with a single valve member having both a sleeve valve and a disk valve on the single valve member that is assembled into a sprayer housing having a continuous discharge passage and supply passage to provide a trigger sprayer construction with a reduced number of separate component parts.
Claims27
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.
3 more elements
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;
- and,
- one of the inlet valve element and the outlet valve element being a tube and one of the inlet valve element and outlet valve element being a disk.
2 more elements
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;
- and,
- the outlet valve element being a tube.
2 more elements
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 inlet valve element being a disk;
- a circular surface inside the sprayer housing and around the liquid supply passage;
- and
- the inlet valve element disk overlays the circular surface in the closed position of the inlet valve element disk and the inlet valve element disk is displaced from at least a portion of the circular surface in the opened position of the inlet valve element disk.
4 more elements
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;
- and,
- the inlet valve element being a disk and the outlet valve element being a tube.
2 more elements
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;
- and,
- a trigger mounted on the sprayer housing for pivoting movement of the trigger, the trigger having an integral spring arm extending from the trigger and engaging with the sprayer housing.
2 more elements
A manually operated trigger sprayer comprising:
- a sprayer housing having a liquid outlet opening and a liquid inlet opening, 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, the liquid discharge passage having an interior surface, a liquid supply passage extending through the sprayer housing from the liquid inlet opening to the pump chamber, the liquid supply passage having an interior surface;
- a pump piston mounted in the pump chamber for reciprocating movement between charge and discharge positions of the pump piston in the pump chamber;
- an inlet valve element disk with a peripheral edge positioned in the liquid supply passage and being movable between a closed position where the inlet element disk peripheral edge engages with the liquid supply passage interior surface and an opened position where the inlet valve element disk peripheral edge at least partially disengages from the liquid supply passage interior surface in response to the pump piston moving to the discharge and charge positions, respectively;
- and,
- an outlet valve element tube with an exterior surface positioned in the liquid discharge passage and being movable between a closed position where the outlet valve element tube exterior surface engages with the liquid discharge passage interior surface and an opened position where the outlet valve element tube exterior surface at least partially disengages from the liquid discharge passage interior surface in response to the pump piston moving to the charge and discharge positions, respectively.
2 more elements
A manually operated trigger sprayer comprising:
- a sprayer housing having a liquid outlet opening and a liquid inlet opening, 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;
- an outlet valve element 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 respective charge and discharge positions;
- a valve seat insert that is inserted through the liquid inlet opening into the liquid supply passage, the valve seat insert having a circular surface with an opening in the circular surface, the liquid supply passage extending through the opening in the circular surface;
- and,
- an inlet valve element disk with a peripheral edge positioned in the liquid supply passage and being movable between a closed position where the inlet valve element disk peripheral edge engages with the circular surface closing the liquid supply passage and an opened position where the inlet valve element disk peripheral edge is at least partially disengaged from the circular surface opening the liquid supply passage in response to the pump piston moving to the respective discharge and charge positions.
3 more elements
Dependencies are inferred from the claim text.