Powder inhaler having dispersing, discharge, and dwell-time chambers, along with an acceleration channel
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United States of America Patent
Stats
-
Jul 25, 1995
Grant Date -
N/A
app pub date -
Nov 17, 1993
filing date -
Nov 24, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The powder inhaler is based on a supply container (3) for the drug, which supply container is partially or completely closed off at its lower end by a rotatable or displaceable, manually actuated metering plate (4) for the repeated reception and delivery of a predetermined, reproducible quantity of the drug from the container (3), and of a mouthpiece (14) for inhaling, upstream of which a dispersing chamber (12) is connected. The metering plate (4) is provided with at least one depression (5) which is filled with the drug on actuation of the inhaler. Seen in the flow direction, an acceleration channel is arranged ahead of the dispersing chamber (12), which acceleration channel (8) partially covers the metering plate (4) with part of its longitudinal surface and opens out tangentially into a cylindrical dwell-time chamber (9). The dwell-time chamber (9) is, in turn, connected via a central outlet (10) of smaller diameter than the cylindrical dwell-time chamber (9) to a circular discharge chamber (11 ) which the dispersing chamber ( 12) adjoins tangentially.
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Family
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Cited Art Landscape
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