Title:
エアロゾル化薬剤の送出方法と装置
Document Type and Number:
Japanese Patent JP5395100
Kind Code:
B2
Abstract:
A metered dose inhaler (10) for use with a pressurized aerosol canister (18) includes a housing (12) defining a conduit (16) with a mouthpiece (56), and an actuator (26) with a nozzle discharge orifice (30) arranged to discharge aerosol into the conduit. An air tube (34) is arranged within the conduit with an inlet (38) of the air tube formed in the conduit wall (74) and an outlet (36) of the air tube in opposing relationship with the nozzle orifice. Inhalation through the mouthpiece causes air to be drawn into the inlet and flow out of the outlet of the air tube to form an air jet which impinges on an oppositely moving aerosol plume from the orifice. Auxiliary air inlets (46) in the closed end (24) of the conduit provide a boundary layer flow along the inner wall (44) of the conduit. Vortex generators (54) on the inner wall of the conduit add vorticity and turbulence to the boundary layer flow. Automatic actuation of the canister responsive to the patient's inhalation is achieved by a canister trigger (154) connected to a movable piston assembly (132) forming a wall of a variable-volume chamber (162) in fluid communication with a venturi (184) in the air tube. Air drawn through the venturi by the user's breath causes evacuation of air from the chamber, thereby moving the piston assembly and trigger to cause actuation of the canister.
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Inventors:
Thomas Aretz Armor
Bryce Barwick Evans
Naheed Mosen Mosen
Richard Mashiyu Pubkov
Achiyuru M Shiyudar Curl
Bryce Barwick Evans
Naheed Mosen Mosen
Richard Mashiyu Pubkov
Achiyuru M Shiyudar Curl
Application Number:
JP2011031934A
Publication Date:
January 22, 2014
Filing Date:
February 17, 2011
Export Citation:
Assignee:
Systematic Palmanary Delivery Limited
International Classes:
A61M13/00; A61M15/00
Domestic Patent References:
| JP62221366A | ||||
| JP5505968A | ||||
| JP3504457A | ||||
| JP63077460A | ||||
| JP8500743A |
Foreign References:
| GB2279879A | ||||
| WO1997025086A2 | ||||
| US3406913 | ||||
| GB1253221A |
Attorney, Agent or Firm:
Kawaguchi International Patent Office