Dispensing – Processes of dispensing
Patent
1982-08-09
1985-03-26
Marmor, Charles A.
Dispensing
Processes of dispensing
2224022, B65D 8314
Patent
active
045068038
ABSTRACT:
An aerosol dispenser dispenses the contents of a metering chamber by depression of a slidable stem which extends through the metering chamber and into the main fluid reservoir of the dispenser. The stem includes a dispensing passage which lies within one of a pair of chamber sealing sleeves when the stem is in a rest position, thus fluidically isolating the exterior of the apparatus from the metering chamber. In this position, the metering chamber and the main reservoir are also fluidically isolated from each other. After shaking the dispenser to mix its contents, i.e., an active agent and propellant, the stem is then depressed into a charging position in which the dispensing passage is placed into engagement with an additional sealing sleeve mounted within the metering chamber to fluidically isolate the metering chamber from the exterior of the dispenser. Simultaneously, the bypass passage is positioned to straddle the other chamber sealing sleeve, and to thus fluidically connect the main reservoir to the metering chamber, which is then charged with the active agent and propellant from the reservoir. The stem is then released, and a spring drives the stem towards its first rest position. During this movement, the apparatus is in its dispensing position, and the contents of the charged metering chamber are dispensed through the dispensing passage exteriorly of the apparatus. After each metered dose is dispensed, the stem returns to its rest position, and the metering chamber is again fluidically isolated from both the reservoir and the exterior of the dispenser.
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patent: 3499584 (1970-03-01), Warren
patent: 3605738 (1971-09-01), Ciranno
Chen Fang-Chung
Franklin Michael L.
Hoffmann-La Roche Inc.
Johnston George W.
Leon Bernard S.
Marmor Charles A.
Saxe Jon S.
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