Patent ID: 7124788

Claim:
An apparatus to assist in pressure filling propellant into a flexible bag-on-valve aerosol valve system having an outer propellant-storing container having an interior container space, said propellant to be filled into the container space outside the flexible bag, comprising an aerosol valve having a valve stem, a valve stem gasket, a valve housing and a flexible bag mounted on said valve housing; wherein the valve stem has an intermediate portion with an exterior frusto-conical annular surface and the valve housing has an interior frusto-conical annular surface, said respective frusto-conical annular surfaces engaging in annular sealing contact with each other when the stem is deeply depressed for propellant pressure filling, thereby preventing access of the propellant into the flexible bag; wherein said valve stem acts as a single integral member; wherein said respective frusto-conical annular surfaces are separated from one another when the aerosol valve is not actuated for propellant filling and only engage each other during propellant pressure filling; wherein said valve housing is characterized by the absence of a propellant filling orifice through the housing side wall axially below the valve stem gasket and wherein the interior of the outer propellant-storing container is not in contact with the interior of the valve housing upon actuation of the valve to discharge product from the flexible bag, thereby precluding passage of the contents of the outer container to the interior of the valve housing and consequent discharge through the valve stem orifice.