Dry powder medicament inhalator having an inhalation-activated flow diverting means for triggering delivery of medicament
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United States of America Patent
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May 13, 2003
Grant Date -
Mar 21, 2002
app pub date -
Nov 27, 2001
filing date -
Aug 2, 1995
priority date (Note) -
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status (Latency Note)
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Abstract
An inhalation-activated inhalator having a primary inhalation passage and a secondary inhalation passage disposed in communication with the primary inhalation passage and a source of medicament. The primary inhalation passage has airflow inhibiting mechanism connected to a blocking plate positioned to selectively block fluid flow in the secondary inhalation passage. As the user's inhalation reaches a defined rate, the flow inhibiting mechanism restricts flow through the primary inhalation passage and moves the blocking plate to enable airflow through the secondary passage. Thus, as the user achieves a desired inhalation rate, the medicament is provided through the secondary inhalation passage, thereby optimizing the delivery of medicament to the lungs.
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