Dry powder inhaler

A - Human Necessities – 61 – M

Patent

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Details

A61M 15/00 (2006.01) B05B 17/06 (2006.01) A61M 11/00 (2006.01)

Patent

CA 2433799

A dry powder inhaler having a housing, at least one single dose storage chamber (17) able to contain a single unit dose, a discharge path (20) adjacent the storage chamber (17), and a flexible and bendable seal plate (14) closing the discharge path (20). When an air flow under pressure is applied to the top of the dose, the top seal is broken and the dose is driven against the seal plate (14) which deflects away, allowing the powder of the dose to be driven into and along the discharge path (20). The air flow causes the seal plate (14) (in the discharge path) to vibrate, which acts to break up the dose into particles of preferred size, as the dose is carried along with the air flow and delivered to a patient.

La présente invention concerne un inhalateur pour poudre sèche qui possède un boîtier, au moins une chambre de stockage de dose simple destinée à renfermer une dose d'une unité, un trajet d'évacuation contigu à cette chambre de stockage, et une plaque de scellement souple et pliable qui ferme ce trajet d'évacuation. Lorsqu'un flux d'air sous pression est appliqué au dessus de la dose, le scellement supérieur est cassé et la dose est entraînée contre la plaque de scellement qui se dévie, ce qui permet à la poudre de cette dose d'être entraînée dans le trajet d'évacuation et le long de celui-ci. Ce flux d'air entraîne la vibration de la plaque de scellement (dans le trajet d'évacuation), laquelle permet de briser la dose en particules d'une taille préférée, lorsque cette dose est emportée avec ce flux d'air et distribuée à un patient.

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