| 摘要 |
The present invention relates to an inhalation apparatus for dispensing substances for inhalation and, in particular, but not exclusively, for dispensing medicinal products. Inhalation apparatus (1) comprises a housing (11) defining a socket (37) for receiving a pressurised dispensing container (30). The actuator means (61; 80) are provided for receiving a valve stem (63) of the pressurised dispensing container and a cylindrical chamber (lla) having an inlet (67) and an outlet (16). The actuator means defining duct means to direct product dispensed from the valve stem of the pressurised dispensing container through the inlet of the cylindrical chamber in a direction substantially tangential to the major axis of the cylindrical chamber. The outlet of the cylindrical chamber communicating with the mouthpiece (12), characterised in that the inlet is located at a periphery of the chamber and the outlet is located at or near a centre of the chamber such that inhalation by a user on the mouthpiece creates a cyclonic airflow in the cylindrical chamber between the inlet and outlet from which the dispensed product is entrained for inhalation. <IMAGE> |
