| 摘要 |
<p>A liquid dispensed in adjustable, predetermined quantities from a pressurized reservoir upon each actuation of a metering and dispensing valve incorporated in the dispenser. A flexible sleeve is disposed between the reservoir chamber and a selected one of a plurality of differently sized metering chambers to expel the contents of the selected metering chamber when the metering and dispensing valve is actuated. The metering chambers are carried by a rotatably adjustable member which is mounted to the stem of the metering and dispensing valve.</p> |
