Dry powder inhaler
AssigneeDura Pharmaceuticals, Inc.
InventorsMark B. Mecikalski, David R. Williams, David O. Thueson
Life of this patent
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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.
Claims24
An inhaler comprising:
- a housing;
- a mixing chamber within the housing;
- an impeller in the mixing chamber;
- means for rotating the impeller;
- a front cylinder attached to the housing and including a cylinder chamber;
- a first plurality of openings extending between the mixing chamber and the cylinder chamber;
- and
- a second plurality of openings extending radially through the front cylinder.
Dependencies are inferred from the claim text.