GB1201918A — Improvements in or relating to valves for pressurised dispensers

USPTO Abstract

1,201,918. Delivering measured quantities of liquid. BESPAK INDUSTRIES Ltd. 21 Dec., 1967 [21 Dec., 1966], No. 57287/66. Heading B8N. [Also in Division F1]; An aerosol metering valve for use with a container for pressurized liquid comprises a metering chamber 3 and a valve member 7 movable in resilient seals 4, 6 between an inoperative position in which the metering chamber is isolated from atmosphere and an operative position in which the contents of the metering chamber can be discharged to atmosphere while the chamber is isolated from the interior of the container. As shown the valve member 7 is formed with two inlet ports 13, 14 connected by a cavity 16 and an outlet port 11 so that upon depressing the valve the port 13 first communicates with the interior of the container so that the liquid flows into the measuring chamber via the cavity 16 and port 14, upon further depression of the valve the port 14 is closed and the port 11 is brought into communication with the measuring chamber so that the liquid is dispensed therefrom. In modifications the cavity 16 may be replaced by a recess (20, Fig. 2) or the port 14 may be connected to an axial passage extending downwardly through the valve member. The resilient seal 4 may be mounted on a frustoconical shaped seating (Fig. 3).