Inhaler

Details Inhaler Inhaler

A - Human Necessities

61

M

A61M 15/00 (2006.01)

Patent

CA 2738784

An inhaler (1) for producing an inhalable aerosol of powdered medicament is disclosed. The inhaler (1) comprises an aerosolising device having a cyclone chamber (45) of substantially circular cross-section, inlet (24) and outlet (25) ports at opposite ends of the chamber (45) for the flow of drug laden air through the chamber (45) between said ports (24, 25) and, a bypass air inlet (46) for the flow of clean air into the chamber (45). The bypass air inlets (46) are configured so that air entering the chamber (45) through said inlet (46) forms a cyclone in the chamber (45) that interacts with the drug laden air flowing between the inlet (24) and outlet (25) ports. The inhaler (1) may have a tapered drug laden air flow conduit (70) to accelerate the flow prior to entry into the chamber (45) and/or an impaction element (81, 84, 92, 105) to deagglomerate drug particles.

La présente invention concerne un inhalateur destiné à produire un aérosol inhalable de médicaments sous forme de poudre. Linhalateur comprend un dispositif de production daérosols comprenant une chambre cyclonique de section transversale pratiquement circulaire, des orifices dentrée et de sortie à des extrémités opposées de la chambre destinée à la circulation de lair chargé en médicaments à travers la chambre entre lesdits orifices et, une entrée dair secondaire destinée à la circulation dair propre à lintérieur de la chambre. Les entrées dair secondaire sont configurées de sorte que lair entrant dans la chambre à travers lesdites entrées forme un cyclone dans la chambre qui interagit avec lair chargé de médicaments circulant entre les orifices dentrée et de sortie. Linhalateur peut avoir un conduit conique de circulation dair chargé de médicaments destiné à accélérer le courant dair avant lentrée dans la chambre et/ou un élément dimpact destiné à désagglomérer les particules de médicaments.

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