(57) A valve assembly which allows pressure filling of an aerosol container and dispensing
of metered volumes of material therefrom comprising:
a casing member adapted to format least the top portion of an aerosol container,
a first hollow body secured inside of the casing member defining a metering tank,
the metering tank having a pressure filling valve comprising an aperture in the metering
tank communicating with the aerosol container which aperture is adjacent the casing
member and covered by a sealing member which prevents passage of material from the
aerosol container to the metering tank but allows passage of material from the metering
tank to the aerosol container when there is sufficient pressure difference between
the metering tank and aerosol container,
an elongate valve member sealingly extending through respective apertures in the casing
member and metering tank capable of longitudinal movement between a closed and dispensing
position, such that in the dispensing position there is an open channel through the
elongate valve member connecting the metering tank with the outside environment and
the metering tank is sealed to prevent passage of material from the aerosol container
to the metering tank, and in the closed position the elongate valve member allows
passage of material from the aerosol container to the metering tank and prevents passage
of material from the metering tank to the outside environment,
and a second hollow body retained upon and forming a | shroud around the metering
tank, the shroud extending substantially to the casing member and covering said sealing
member ofthe metering tank to allow only limited movement thereof, the shroud and
metering tank defining at least one passage through which material from the aerosol
container may pass into the metering tank when the elongate valve member is in the
closed position.
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