Dry powder inhalers having spiral travel paths, unit dose...

A - Human Necessities – 61 – M

Patent

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Details

A61M 15/00 (2006.01)

Patent

CA 2635622

Dry powder inhalers (10) include: (a) a first generally planar spiral travel path (30) in an inhaler body, wherein the first spiral travel path has a plurality of adjacent curvilinear (30 ch) channels forming lanes with upstanding sidewalls, including an inner lane (30:) and an outer lane; and (b) a plurality of discrete sealed microcartridges (25) with substantially rigid bodies disposed in the first travel path, each comprising a pre-metered (typically dose) amount of dry powder, the microcartridges being configured to slidably advance along the first travel path toward an inhalation chamber that merges into an inhalation output port (10 p). In operation, at least one microcartridge is held in the inhalation chamber to release the dry powder therein during inhalation.

L'invention concerne des inhalateurs de poudre sèche comprenant : (a) un premier chemin de circulation spiralé généralement planaire dans un corps d'inhalateur, selon lequel le premier chemin de circulation spiralé a une pluralité de canaux curvilignes adjacents formant des files avec des parois latérales droites, comprenant une file interne et une file externe; et (b) une pluralité de micro-cartouches scellées discrètes avec des corps sensiblement rigides disposées dans le premier chemin de circulation, chacune comprenant une quantité mesurée par avance (généralement une dose) de poudre sèche, les micro-cartouches étant configurées pour avancer de manière coulissante le long du premier chemin de circulation vers une chambre d'inhalation qui s'unifie dans un orifice de sortie d'inhalation. En fonctionnement, au moins une micro-cartouche est contenue dans la chambre d'inhalation pour libérer la poudre sèche dans celle-ci pendant l'inhalation.

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