GB2264238A — Medicament inhalor device

USPTO Abstract

An inhaler device for use with a drug delivery system, e.g. an aerosol container, comprising a housing 400 for receiving said container, having air inlet slots 420 and a mouthpiece 405 through which a dose of medicament entrained in an air flow is inhaled. A breath actuated release lever 602, in one condition, closes the air inlet slots 420 to inhibit ingress of foreign matter therethrough, and, in a second condition, actuates a release mechanism 540, 495 to release a spring 460 to cause actuation of the aerosol container. The lever 602 in the second condition opens a valve port in a diaphragm 440 to vent an underpressure developed between the diaphragm and top of a sliding sleeve 420 and acting to counter or partially counter the force of the spring 40 thereby allowing the spring to urge the sleeve 420 and the aerosol can downwardly to disperse the medicament. The drug delivery system may comprise a dry powder dispenser instead of an aerosol. <IMAGE>