Dry powder inhaler
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United States of America Patent
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-
May 2, 2000
Issued Date -
N/A
app pub date -
Jul 22, 1998
filing date -
May 20, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A dry powder medicine inhaler has an impeller non-concentrically disposed in a mixing chamber. A motor spins the impeller at high speed. A plunger introduces a dose of powdered medicine into the chamber so that all powder particles are available for intermixing disaggregation and comminution. An aperture receives a first stream of air and passes it towards the mouthpiece for inhalation by the user. A wall has at least one aperture for diverting a portion of a main air stream into the aerosolizing chamber to mix with the particles to form a fine, low-density, low velocity, dry mist of powdered medicine for inhalation by the user.
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