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Inhalation device

  • US 6,142,146 A
  • Filed: 06/12/1998
  • Issued: 11/07/2000
  • Est. Priority Date: 06/12/1998
  • Status: Expired due to Term
First Claim
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1. In a dry powder inhaler comprising a first chamber, a vibrator operatively connected to said first chamber in which a dry powder is deaggregated by said vibrator and separated by size, and a second chamber in which the size-separated deaggregated powder is picked up by an air stream generated during inhalation by a patient through an opening in said inhaler and is carried for introduction into the patient, the improvement which comprises electronic circuitry with feedback control for controlling dosing.

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