Dispensing apparatus
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United States of America Patent
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-
May 16, 2000
Grant Date -
N/A
app pub date -
Apr 11, 1995
filing date -
Nov 4, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A dispensing apparatus which defines an outlet through which a metered dose of liquid from a reservoir is dispersed as an atomized spray. A droplet of liquid is metered onto a perforate membrane which is vibrated by way of a piezoelectric transducer such that atomized droplets are dispensed through the holes formed in the membrane. At each actuation of a delivery device, which provides the metered quantity of liquid, the transducer is actuated so as to vibrate the membrane for a period greater than the dispensing period required for the droplet to be dispensed. The apparatus is particularly suitable for dispensing pharmaceutical preparations.
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