Powder inhaler

A - Human Necessities – 61 – M

Patent

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Details

A61M 15/00 (2006.01)

Patent

CA 2494064

A powder inhaler comprises a container (7) for storing a powdered medicament, a metering member (15) having a dosing recess (18) to be filled with a dose of the powdered medicament, and a mouthpiece (3) being in communication with an inhalation channel (27) of the powder inhaler. Furthermore, the powder inhaler comprises a protective member (19) which is slidingly moveable on the metering member (15) between a closed position, in which it at least covers the dosing recess (18) of the metering member (15) if the metering member (15) is in an inhalation position, and an open position, in which it exposes the dosing recess (18) thereby enabling inhalation of the dose of the powdered medicament contained in the dosing recess (18). The protective member (19) is preferably coupled to an inhalation actuated mechanism (21-23) in such a manner that the inhalation actuated mechanism (21-23) moves the protective member (19) from its closed position to its open position only if there is an inhalation suction force exerted by a user which exceeds a predetermined level. This prevents the dose contained in the dosing recess (18) from falling out of the dosing recess, unless there is no inhalation process initiated by the user. Therefore, the powder inhaler can also be operated reliably upside down. Furthermore, a deagglomerator arrangement (cyclone), which may be incorporated in such a powder inhaler, is proposed which comprises a vortex chamber (73) having a diameter between 6 mm and 8 mm, preferably 8 mm.

L'invention concerne un inhalateur de poudre qui comprend un contenant (7) servant à contenir un médicament en poudre, un élément de mesure (15) pourvu d'un évidement de dosage (18) destiné à être rempli d'une dose du médicament en poudre, et un embout buccal (3) en communication avec un canal d'inhalation (27) de l'inhalateur. Cet inhalateur comprend de plus un élément de protection (19) pouvant être déplacé coulissant sur l'élément de mesure (15) entre une position fermée, dans laquelle il couvre au moins l'évidement de dosage (18) de l'élément de mesure (15) si ce dernier (15) est en position d'inhalation ; et une position ouverte dans laquelle il expose l'évidement (18) et permet ainsi l'inhalation de la dose du médicament en poudre contenu dans l'évidement (18). L'élément de protection (19) est de préférence couplé à un mécanisme (21-23) actionné par l'inhalation, de sorte que ledit mécanisme (21-23) ne déplace l'élément de protection (19) de sa position fermée à sa position ouverte que si la force d'inhalation appliquée par l'utilisateur est supérieure à un niveau prédéterminé. Ce système permet d'éviter que la dose contenue dans l'évidement (18) ne tombe hors de celui-ci en l'absence d'un processus d'inhalation initié par l'utilisateur. Cet inhalateur de poudre peut donc également être actionné de manière fiable lorsqu'il est renversé. De plus, un dispositif de désagglomération (cyclone) pouvant être incorporé dans un tel inhalateur comprend une chambre à vortex (73) présentant un diamètre compris entre 6 mm et 8 mm, de préférence 8 mm.

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Profile ID: LFCA-PAI-O-1372006

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