| 摘要 |
A metering valve for a pressurized fluid reservoir with an immobile fixed chamber body sealed off by a plug with at least one opening that serves as an inlet into the metering chamber that also serves as the outlet of any temporarily stored pressurized gas, with a valve stem that surrounds the metering chamber that it is co-axially aligned and slidable with respect to the metering chamber such that the valve stem's attached seals and its dispensing opening expose the metering chamber's opening to the dispensing opening of the valve stem as the valve stem is actuated to overcome the biasing forces of a spring, and subsequently close the metering chamber's opening when not actuated from the valve stem's dispensing opening and expose the metering chamber's opening to the pressurized fluid reservoir so that a metered dose of pressurized fluid is dispensed during each cycle of actuation of the valve stem.
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