Patent ID: 8025051

Claim:
A delivery device for administering particulate medicament to a subject, the device comprising: a body defining at least a portion of a flow path for a stream of air drawn through the device, the flow path including a chamber defined at least partially by a surface that is rotatable with respect to the body, the chamber having an inlet and an outlet; and a medicament dislodger that is attached to the body and disposed within the chamber, wherein the dislodger is in contact with a wall at least partially defining the chamber and a mouthpiece insert, the dislodger configured to remove particulate medicament from the wall as the surface is rotated with respect to the body and the mouthpiece insert, wherein the dislodger includes a helix positioned between the inlet and the outlet of the chamber and in contact with the wall of the mouthpiece insert, the helix being arranged to remove particulate medicament from the wall of the mouthpiece insert during rotation of the dislodger with respect to the mouthpiece insert and impart a rotational movement to the air drawn through the delivery device.