| 摘要 |
<p>A valve assembly which allows pressure filling of an aerosol container and dispensing of metered volumes of material therefrom, The assembly includes a casing member, a first hollow body secured inside of the casing member to define a metering tank, an elongate valve member sealingly extending through respective apertures in the casing member and the metering tank, and a second hollow body retained upon and forming a shroud around the metering tank, The metering tank has a pressure filling valve comprising an aperture in the metering tank covered by a sealing member. The shroud and the metering tank define at least one passage through which material from the aerosol container can pass into the metering tank when the elong ate valve member is in a closed position,</p> |
