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    • 99. 发明专利
    • DE69935728T2
    • 2008-04-03
    • DE69935728
    • 1999-10-14
    • PHILIP MORRIS USA INC
    • COX KENNETH ABEANE TIMOTHY PAULSWEENEY WILLIAM RNICHOLS WALTER ASPRINKEL F MURPHY
    • A61M11/00A61M16/00A61M11/04A61M13/00A61M15/00B67D7/02
    • An aerosol generator includes a flow passage having an inlet and an outlet, a heater arranged relative to the flow passage for heating the flow passage, a source of material to be volatilized in communication with the inlet of the flow passage, a valve to open and close communication between the source of material and the inlet of the flow passage, and a pressurization arrangement for causing material in the source of material to be introduced into the flow passage when the valve is in an open position. The aerosol generator further includes a source of power for operating the heater and the valve, and a control device for controlling supply of power from the source of power to the heater and the valve. A metering device in an inhaler includes a pressurized source of medicated fluid and a metering chamber configured to deliver a predetermined volume of fluid to a heated flow passage in the inhaler. The metering chamber can be part of a rotary valve having a bore and a displacement member moveable within the bore from a first position where the fluid is loaded into the bore to a second position where the predetermined volume is ejected out of the bore. Another metering chamber has an elastic portion of a delivery passage in fluid communication with the pressurized source of liquid and the elastic portion of the delivery passage is deformed to eject the predetermined volume.