초록

A packless non-refillable valve which incorporates a diaphragm.

대표청구항 ▼

Non-refillable valve for a pressure container, comprising: (a) a housing, having a central bore which has a middle portion, a lower portion that is narrower than the middle portion of said central bore, an upper portion that is narrower than said middle portion of said central bore and an uppermost

Non-refillable valve for a pressure container, comprising: (a) a housing, having a central bore which has a middle portion, a lower portion that is narrower than the middle portion of said central bore, an upper portion that is narrower than said middle portion of said central bore and an uppermost portion that is wider than said upper portion of said central bore, and having a side port which communicates with the lower region of said middle portion of said central bore, the lower end of said housing being adapted to sealingly engage said pressure container in a manner which provides communication between said pressure container and said lower portion of said central bore; (b) a nozzle, having a bore therein which communicates with the atmosphere, said nozzle being positioned on the side of said housing and being in communication with said middle portion of said central bore via said side port in said housing; (c) an insert ring positioned in said uppermost portion of said central bore; (d) valve stem means positioned in upper portion of said central bore in a rotatable manner by which the valve stem means is advanced back and/or forth in said central bore; (e) a diaphragm, having a central hemispherical or curved portion and a rim, the convex portion of the central portion facing the valve stem, the end of said insert ring contacting said rim of said diaphragm so as to hold it in position against the interface between said uppermost portion and said upper portion of said central bore; and (f) a resilient valve sealing member which has a lower body portion, an upper extension portion and a centrally-located bore which does not extend through the top of the valve sealing member, said extension portion having a top hemispherical, curved or flat portion which is in mating relationship with or contacting, respectively, said hemispherical or curved portion of said diaphragm, said body portion having a top rim portion which has a lateral dimension which is larger than the lateral dimension of said upper portion of said central bore of said housing and which is less than the lateral dimension of the middle portion of said central bore of said housing, said body portion having a bottom seating portion which is capable of seating at or on the interface of said middle portion and bottom portion of said central bore of said housing, said top rim portion not containing any indentations, and said body portion not containing any arms, said top rim portion of said valve sealing member being compressingly positioned in said upper portion of said central bore when said valve is inactive or being filled, said valve sealing member being pushed into said middle portion by means of said valve stem means via said diaphragm when said valve is placed in the active position, said valve sealing member being seated against said interface between said middle and lower portions of said central bore when said valve is closed, said sealing member being positioned in said middle chamber above a said seating interface with said valve is used for discharge of said container, and said sealing member sealingly engaging said seating interface when refill of said container with pressurized fluid is attempted.