Powder jet dispenser for medicament inhalation therapies
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United States of America Patent
Stats
-
Aug 20, 1996
Grant Date -
N/A
app pub date -
Nov 15, 1994
filing date -
Mar 25, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A powder jet dispenser for medicament inhalation therapies, intended to be the drug pack container, incorporating a dose metering system, comprising a filling unit (27, 28, 29, 30, 31, 35) and a separation unit (25, 26) to fill a fix positioned dosage chamber (19) and to provide, after filling, air-tight separation of the filling unit from the medicament reservoir (36). The dosage chamber (19) being connected to a compression chamber (5) of a servo-assisted air compression system actuated by a manual stroke of a plunger (3) providing the compression of a spiral load spring (7). The load spring is released through a sliding control mechanism (11, 14) which is automatically actuated by the stroke of the plunger (3). The load spring (7) bears against a piston (8) which, upon release, snaps forward into said compression chamber (5) producing a jet of compressed air which reaches the dosage chamber (19), and passes the drug into the user's mouth through a nozzle (20) provided with a check valve (22) to avoid the entrance of external air.
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