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US 5,467,798 AGranted
Refill-preventing valve for non-refillable containers
AssigneeLiquid Air Corporation
InventorsGeorge D. Baker, V. Russell Henry
Life of this patent
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AssigneeLiquid Air Corporation
InventorsGeorge D. Baker, V. Russell Henry
Estimating the term…
A non-refill valve for a non-refillable container, comprising a valve body having an inlet and an outlet and a passage through the valve body interconnecting the inlet and the outlet. A valve stem slides in the passage and has an axial passageway that extends partway therethrough and that terminates laterally in a passageway that extends through a side wall of the stem intermediate the ends of the stem. A ball in the stem rests on a seat on the stem and closes the valve stem passageway against the flow of gas from the outlet towards the inlet. A first spring urges the ball against the seat to permit flow of gas only in a direction from the inlet to the outlet by displacing the ball from the seat against the action of the first spring in an open position of the valve. A second spring urges the stem in the direction of the flow of gas from the inlet to the outlet, and a seal acts between the stem and the valve body. The second spring urges the seal into sealing relation with the valve body in a closed position of the valve, whereby when a coupling is attached to the valve body, the coupling urges the stem in a direction opposite the first-mentioned direction and against the action of the second spring to move the seal out of sealing relation with the valve body, thereby to establish communication between the inlet and the outlet when the pressure of a gas in the inlet is sufficient to move the ball off the seat against the action of the first spring.
A non-refill valve for a non-refillable container, comprising a valve body having an inlet and an outlet and a passage through the valve body interconnecting the inlet and the outlet, a valve stem slidable in said passage, the valve stem having an axial passageway that extends partway therethrough and that terminates laterally in a passageway that extends through a side wall of the stem intermediate the ends of the stem, a ball in the stem that rests on a seat on the stem and that closes said valve stem passageway against the flow of gas from said outlet towards said inlet, first resilient means urging the ball against said seat to permit flow of gas only in a direction from said inlet to said outlet by displacing the ball from the seat against the action of said first resilient means in an open position of said valve, second resilient means urging the stem in the direction of the flow of gas from said inlet to said outlet, and sealing means between the stem and the valve body, said second resilient means yieldably urging said sealing means into sealing relation with said valve body in a closed position of said valve, whereby when a coupling is attached to said valve body, said coupling urges said stem in a direction opposite the first-mentioned direction and against the action of said second resilient means to move said sealing means out of sealing relation with said valve body, thereby to establish communication between said inlet and said outlet when the pressure of a gas in said inlet is sufficient to move said ball off said seat against the action of said first resilient means.
A non-refill valve for a non-refillable container, comprising a valve body having an inlet and an outlet and a passage through the valve body interconnecting the inlet and the outlet, a valve stem slidable in said passage, the valve stem having an axial passageway that extends partway therethrough and that terminates laterally in a passageway that extends through a side wall of the stem intermediate the ends of the stem, an obturator in the stem that rests on a seat on the stem and that closes said valve stem passageway against the flow of gas from said outlet towards said inlet, first resilient means in said valve stem passageway urging the obturator against said seat to permit flow of gas only in a direction from said inlet to said outlet by displacing the obturator from the seat against the action of said first resilient means in an open position of said valve, a separate retainer fixed in said valve stem passageway and against which said first resilient means acts, second resilient means urging the stem in the direction of the flow of gas from said inlet to said outlet, and sealing means between the stem and the valve body, said second resilient means yieldably urging said sealing means into sealing relation with said valve body in a closed position of said valve, whereby when a coupling is attached to said valve body, said coupling urges said stem in a direction opposite the first-mentioned direction and against the action of said second resilient means to move said sealing means out of sealing relation with said valve body, thereby to establish communication between said inlet and said outlet when the pressure of a gas in said inlet is sufficient to move said obturator off said seat against the action of said first resilient means.
A non-refill valve usable in conjunction with a container to prevent the container from being refilled, comprising a valve body having an inlet, an outlet and a passage extending between the inlet and the outlet, a valve stem having a passageway extending therethrough for allowing fluid to flow from the inlet of the valve body to the outlet of the valve body, said valve stem being movably positioned within the passage in the valve body for repeated movement between a first position in which fluid flow from the inlet into the passageway is permitted and a second position in which fluid flow from the inlet into the passageway is prevented, flow control means positioned within the passageway in the valve stem for closing the passageway in the valve stem to prevent the container from being refilled by preventing fluid flow through the passageway in the direction toward the inlet and for permitting fluid flow through the passageway in the direction toward the outlet when fluid pressure adjacent the inlet exceeds a predetermined amount, first urging means for urging the valve stem toward said second position and for allowing the valve stem to be moved to the first position in which fluid flow from the inlet to the passageway is permitted.
Dependencies are inferred from the claim text.