Unit dose capsules and dry powder inhaler

Details Unit dose capsules and dry powder inhaler Unit dose capsules and dry powder inhaler

A - Human Necessities

61

M

A61M 15/00 (2006.01) A61J 1/00 (2006.01)

Patent

CA 2542640

The dry powder inhaler comprises an intake section; a mixing section, and a mouthpiece. The mouthpiece is connected by a swivel joint to the mixing section, and may swivel back into the intake section and be enclosed by a cover. The intake chamber comprises a piston with a tapered piston rod and spring, and one or more bleed-through orifices to modulate the flow of air through the device. It optionally comprises a feedback module to generate a tone indicating when the proper rate of airflow has been achieved. The mixing section holds a capsule with holes containing a dry powder medicament, and further opens and closes the capsule when the intake section is at a certain angle to the mouthpiece. The mixing section is a Venturi chamber to impart a cyclonic flow of air passing through the mixing chamber.

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