Inhalation device
AssigneeAstraZeneca AB
InventorsJan Andersson, Allan Dagsland, Hans Strid, Jan Trofast, Stefan Friess, Harald Heckenmueller, Uwe Rollwage, Volker Tiedemann, John Conway
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Abstract
A powder inhaler for administering powder by inhalation, comprising: a flow path defined by a plurality of surfaces through which a stream of air is in use drawn on inhalation by a user; and dosing means (18) for providing a dose of powder to the flow path for entertainment in the stream of air; characterized in that the inhaler further comprises dislodging means for dislodging powder accumulated on a surface of the flow path downstream of the dosing means (18).
Claims6
A powder inhaler for administering powder by inhalation, comprising:
- a dosing unit for providing a dose of powder;
- and
- a flow path downstream of the dosing unit which is defined by a plurality of surfaces though which a stream of air entraining the dose of powder is in use drawn on inhalation by a user;
- characterized in that at least one of the surfaces of the flow path is movable relative to at least one other of the surfaces of the flow path and in that the inhaler further comprises a powder dislodging member which is of fixed position relative to one of the at least one or at least one other of the surfaces of the flow path and is configured on relative movement of the at least one and one other of the surfaces of the flow path, to contact the other of the at least one or at least one other of the surfaces of the flow path such as to dislodge powder accumulated thereon.
Dependencies are inferred from the claim text.