Patent ID: 8905022

Claim:
A dry powder inhaler of the type that comprises first and second medicament reservoirs, said first and second medicament reservoirs having associated therewith respective rotatable first and second metering members, the first and second metering members being mounted for rotation about a common axis and urged into sealing engagement with the respective medicament reservoir by a compression spring located between the first and second metering members and mounted about said axis, and the inhaler including an actuator by which the first and second metering members are rotated in unison from a metering position, at which the first and second metering members are charged with doses of medicament from the associated reservoirs, to a dispensing position, at which said doses are or can be discharged from the first and second metering members, characterised in that the actuator acts upon the first and second metering members via a wheel mounted between the first and second metering members for rotation about said axis, the first and second metering members being provided with sockets that receive the respective ends of the compression spring, the sockets having extensions that project into an axial bushing of the wheel, the bushing being provided on its internal surface with formations that engage the extensions to cause the metering members to rotate when the wheel is rotated.