Patent ID: 6257232
Filing Date: 2001-07-10
Classification: A61M

Abstract:
An inhaler for administering powder by inhalation, comprising:a plurality of surfaces defining a flow path through which a stream of air is in use drawn on inhalation by a user, where the flow path includes a mouth piece;a dosing mechanism for providing a dose of powder to the flow path for entrainment in the steam of air; anda movable member downstream of the dosing mechanism for inhibiting accumulation of powder on a surface of the flow path downstream of the dosing means,wherein the flow path includes a chamber having an inlet and an outlet,wherein the movable member interrupts the stream of air drawn through the inlet of the chamber and is movable at least partially by the stream of air,wherein the movable member is a rotatable member which is rotatable about an axis within the chamber so as, in use, to present a moving surface towards which the stream of air containing powder drawn through the inlet of the chamber is directed;wherein the rotatable member comprises a tubular section having disposed therein at least one spirally or helically shaped projection and a radially outwardly-extending flange which defines a surface of the chamber.