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Dry powder inhaler

  • US 5,875,776 A
  • Filed: 04/09/1996
  • Issued: 03/02/1999
  • Est. Priority Date: 04/09/1996
  • Status: Expired due to Term
First Claim
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1. A dry powder inhaler for use with a removable dosing cartridge, wherein said dosing cartridge includes a dry powder in a cell with one or more sealed openings, the dry powder inhaler comprising:

  • a housing adapted to removably receive a dosing cartridge, the housing defining three passages;

    a first valve for controlling the flow of gas from the first passage to the second passage; and

    a mouthpiece;

    whereinthe first passage includes a connection adapted for connecting to a source of pressurized gas;

    the second and third passages have a suspension system for separately connecting to and rupturing the sealed openings of a cell, and additionally for suspending a dry powder; and

    the third passage is further connected to the mouthpiece.

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