Non-refillable valve

Abstract

A nonrefillable valve is provided that allows for an initial filling of a container, but prevents subsequent refilling of the container. The valve operating assembly includes a valve stem and a valve core which is slidably received in the distal end of the valve stem. In a first position, the valve core resides above a rim or protrusion within the chamber. After filling of the container, a second position is defined when the valve stem is operated to force the valve core beyond the protrusion and in seating engagement with a valve seat, thus sealing the container. The valve is then selectively operated in a third or open position to discharge the container as desired. Subsequent refilling of the container is prevented by the force of fluid reentering the valve which forces the valve core to its seated engagement with the valve seat.

Description

REFERENCE TO RELATED APPLICATIONS

[0001] This is a continuation application of U.S. patent application Ser. No. 09 / 948,328 filed on Sep. 6, 2001, and entitled “Non-refillable Valve”, which is incorporated herein by reference in its entirety.FIELD OF THE INVENTION

[0002] This invention relates to nonrefillable or single use valves used in pressurized systems. More particularly, the invention relates to a nonrefillable valve especially adapted for use with pressurized vessels or containers wherein the construction of the valve allows the pressure container to be filled once, and then selectively discharged; however, subsequent refill of the pressure container is prevented. BACKGROUND OF THE INVENTION

[0003] Valves are commonly used to control the discharge of fluid from a pressure container or vessel. Typically, such valves include a handle or some other means by which a user can selectively control discharge of the container. Pressure containers may contain any number of products suc...

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