| 摘要 |
<p>A dispensing device for a pressurized liquid container capable of delivering metered quantities of an aerosol composition having a discharge tube through which the container can be filled with fluids under pressure including a generally cylindrical chamber including an upper chamber and a generally cylindrical lower chamber, a discharge tube mounted in the sealed upper end of the chamber and extending into the chamber, the discharge tube being axially movable in the chamber and having a cup-shaped piston member connected thereto, the cup-shaped piston having a resilient rim slidable within the lower chamber when the discharge tube is depressed a predetermined amount to isolate a metered quantity of fluid within the upper chamber, the rim of the cupshaped piston member being sufficiently resilient to allow fluids introduced under pressure through the discharge tube during filling of the container to flow between the rim and the side walls of the lower chamber. The discharge tube has a skirt at the lower end which strikes the seal to limit upward movement of the tube. The skirt has a pin which extends downwardly from the discharge tube and is slidably received in a hollow upper section of the piston.</p> |
