Breathing-controlled inhalation device for dry powder and method for the even distribution of the dry powder in the air
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United States of America Patent
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May 4, 2004
Issued Date -
N/A
app pub date -
Apr 4, 2002
filing date -
Oct 6, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A breathing-controlled inhalation device for dry powder comprises a casing with a mouthpiece, a reservoir for dry powder in the casing, and an air guiding unit between a transfer area for the dry powder and the mouthpiece. A dosing conveyor accepts a predetermined amount of powder from the conveyor and upon manual depression of the conveyor, transfers the powder to the inlet of the air guiding unit. The air guiding unit has an air flow channel comprising a cylindrical component having semispherical indentations formed alternatively from opposite walls and extending into the channel to increase turbulence in the air flow and enhance distribution of the particles.
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