Delivery devices

Abstract

A delivery device for delivering a metered amount of substance (L) in response to exhalation by a user, the delivery device comprising: a mouthpiece (5) through which the user in use exhales; an outlet (45) from which substance Is delivered; and a dispensing unit (35) which is operable to dispense a metered amount of substance through the outlet in response to exhalation by the user through the mouthpiece, wherein the dispensing unit comprises a body member (37) which includes a cavity (39) for containing a metered amount of substance, an outlet nozzle (43) which is fluidly connected to the cavity from which substance is in use delivered, and a dispensing (41) member which is movably disposed in the cavity and configured to be driven through the cavity by a driving pressure created by exhalation of the user, such as to cause substance to be delivered from the outlet nozzle.

Dependencies are inferred from the claim text.