Powder inhaler featuring reduced compaction

A - Human Necessities – 61 – M

Patent

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Details

A61M 15/00 (2006.01) A61K 31/221 (2006.01)

Patent

CA 2574398

An inhaler has an air inlet port and an entry passage extending from the air inlet port to a contact chamber inlet port, a contact chamber and an inhaler air outlet port. The contact chamber has first and second opposed ends, a sidewall extending between the first and second opposed ends that in cross section is curved, the second opposed end having an opening in air flow communication with a dosage chamber and a contact chamber outlet port. The contact chamber inlet port is provided in the sidewall and faces a portion of the sidewall opposed to contact chamber inlet port. The contact chamber has a cross sectional area that is greater than the cross sectional area of the entry passage.

L'invention concerne un inhalateur ayant une admission d'air et un passage d'entrée s'étendant de l'admission d'air à celle de la chambre de contact, une chambre de contact et une sortie d'air. La chambre de contact a une première et une seconde extrémités opposées, une paroi latérale s'étendant entre ces première et seconde extrémités et incurvée en section transversale. La seconde extrémité opposée a une ouverture en communication de flux d'air avec une chambre de dosage et une sortie de chambre de contact. L'admission de la chambre de contact, placée dans la paroi, regarde une partie de cette paroi qui lui est opposée. La chambre de contact présente une aire de section transversale supérieure à celle du passage d'entrée.

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