Inhalator with breath flow regulation

A - Human Necessities – 61 – M

Patent

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Details

A61M 15/00 (2006.01) G05D 7/01 (2006.01)

Patent

CA 2169760

There is provided a device for the administration of an inhalation medicament, including a body defining a through-going air pathway having a longitudinal axis, an air inlet, an air outlet forming a mouthpiece, means for dispensing medicament into the pathway and air flow regulating means, characterised in that the air flow regulating means includes a movable obstructing means adapted to reduce the cross-sectional area of the pathway at a location between the air inlet and the means for dispensing medicament, and biassing means, whereby the obstructing means is biassed into a first resting position in which the cross-sectional area of the pathway is minimum and is adapted to move against the bias of the biassing means to a second position in which the cross- sectional area of the pathway is maximum in response to a pressure fall at the mouthpiece caused by inhalation and is adapted to move further to a third position in which the cross- sectional area of the pathway is less than maximum in response to a greater pressure fall at the mouthpiece caused by inhalation.

Cette invention se rapporte à un dispositif servant à administrer un médicament à inhaler et comprenant un corps formant un passage d'air traversant à axe longitudinal, une admission d'air, une évacuation d'air formant un embout buccal, un élément d'administration d'un médicament dans le passage et un élément de régulation de l'écoulement d'air. Ce dispositif se caractérise en ce que l'élément de régulation de l'écoulement d'air comprend un dispositif d'obstruction amovible conçu pour réduire la section transversale du passage à un endroit situé entre l'admission d'air et l'élément servant à administrer le médicament, et un élément de sollicitation au moyen duquel l'élément d'obstruction est sollicité vers une première position de repos dans laquelle la section transversale du passage est minimale et est apte à se déplacer à l'encontre de la force de sollicitation exercée par cet élément de sollicitation vers une deuxième position dans laquelle la section transversale du passage est maximale en réponse à une chute de pression au niveau de l'embout buccal provoquée par l'inhalation, et cet élément d'obstruction peut se déplacer davantage vers une troisième position dans laquelle la section transversale du passage est inférieure à sa valeur maximale en réponse à une chute de pression plus grande au niveau de l'embout buccal provoquée par l'inhalation.

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