| 摘要 |
A metered dose inhaler for aerosol comprises an actuator (1) provided with a cavity (Id), suitable for housing a metered dose container (2) for aerosol provided with a delivery valve (2a), and with a mouthpiece (3) arranged downstream of the cavity and suitable for enabling a user to inhale a metered dose of drug delivered by the container (2). The cavity (1d) is provided with a bottom (1f) wherein a nozzle (4) is formed suitable for housingi the delivery valve (2a) of the container (2) in order to allow the delivery of a metered dose of drug, and the nozzle (4) communicates with a chamber (5) defined inside the actuator (1). The chamber (5) is tightly closed at one end by means of a first unidirectional closing valve (6) arranged in proximity to the mouthpiece (3) and at the opposite end by means of one or more second unidirectional closing valves (7) arranged in correspondence to a plurality of apertures (8) formed therein. |
