Unit dose dry powder inhaler

Details Unit dose dry powder inhaler Unit dose dry powder inhaler

1995-04-21

1997-07-08

Lewis, Aaron J.

Surgery

Respiratory method or device

Means for mixing treating agent with respiratory gas

12820321, A61M 1500

Patent

active

056450516

ABSTRACT:
A dry powder inhaler has a front section holding a unit dose cartridge over a mixing chamber. An impeller is rotatably mounted within the mixing chamber. A rear section of the inhaler includes a motor, a breath actuated switch, and pins for positioning the unit dose cartridge in the front section and driving a plunger through the unit dose cartridge, to deposit a powdered drug into the mixing chamber, as the front and rear sections are brought together. A filter wheel allows air to flow forward from the rear section into the mixing chamber, but substantially prevents stray drug powder from migrating rearwardly to the rear section. The front section is preferably disposable, while the rear section is advantageously reusable.

REFERENCES:
patent: 3971377 (1976-07-01), Damani
patent: 4452239 (1984-06-01), Malem
patent: 5033463 (1991-07-01), Cocozza
patent: 5327883 (1994-07-01), Williams et al.

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