Inhaler with powder dislodging member
AssigneeAstraZeneca AB
InventorsJan Andersson, Allan Dagsland, Hans Strid, Jan Trofast, Stefan Friess, Harald Heckenmueller, Uwe Rollwage, Volker Tiedemann, John Conway
Life of this patent
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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 entrainment 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).
Claims19
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,
- wherein the powder dislodging member comprises one of a scraper or a brush.
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 through which a stream of air entraining the dose of powder is in use drawn on inhalation by a user:
- characterized in that the inhaler further comprises a scraper which is movable relative to at least one of the surfaces of the flow path and is configured, on movement thereof relative to the at least one of the surfaces of the flow path, to contact the at least one of the surfaces of the flow path such as to dislodge powder accumulated thereon.
A powder inhaler comprising
- a housing which includes a screw thread;
- a mouthpiece which is attached to the housing, wherein at least one part of the mouthpiece is rotatable relative to the housing and includes the at least one of the surfaces of a flow path through which a stream of air entraining a dose of powder is in use drawn on inhalation by a user;
- and
- a cap for covering at least the mouthpiece, which cap includes a screw thread for engaging the screw thread on the housing;
- wherein the mouthpiece and the cap are configured such that at least part of the mouthpiece is rotated relative to the housing on one of screwing or unscrewing the cap;
- characterized in that the at least part of the mouthpiece remains substantially in fixed position relative to the housing on the other of screwing or unscrewing the cap.
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 the inhaler further comprises a brush which is movable relative to at least one of the surfaces of the flow path and is configured, on relative movement thereof relative to the at least one of the surfaces of the flow path, to contact the other of the at least one of the surfaces of the flow path such as to dislodge powder accumulated thereon.
Dependencies are inferred from the claim text.