Title:
INHALERS
Document Type and Number:
WIPO Patent Application WO2002007805
Kind Code:
A3
Abstract:
An inhaler for producing an inhalable aerosol of a powdered medicament comprises a cyclone (1) with a tangential air inlet (3) and an axial air outlet (4). The cyclone (1) aerosolises and retains an aerosol of powdered medicament in an airflow circulating between the inlet (3) and the outlet (4). The cyclone (1) has an exit port (2) which is open to atmosphere. When the aerosol is to be inhaled, the pressure in the cyclone (1) is increased by increasing the airflow to the inlet (3) which causes the aerosol to discharge through the exit port (2). The inhaler has the advantage that the rate of discharge of the aerosol can be controlled independently of the rate of airflow required to aerosolise the medicament.
Inventors:
EASON STEPHEN WILLIAM (GB)
HARMER QUENTIN JOHN (GB)
SARKAR MATTHEW NEIL (GB)
HARMER QUENTIN JOHN (GB)
SARKAR MATTHEW NEIL (GB)
Application Number:
PCT/EP2001/008416
Publication Date:
June 13, 2002
Filing Date:
July 20, 2001
Export Citation:
Assignee:
CAMBRIDGE CONSULTANTS (GB)
EASON STEPHEN WILLIAM (GB)
HARMER QUENTIN JOHN (GB)
SARKAR MATTHEW NEIL (GB)
EASON STEPHEN WILLIAM (GB)
HARMER QUENTIN JOHN (GB)
SARKAR MATTHEW NEIL (GB)
International Classes:
A61M15/00; A61M15/02; A61M11/00; A61M16/00; (IPC1-7): A61M15/00
Domestic Patent References:
| WO1995003846A1 | 1995-02-09 | |||
| WO1998026827A1 | 1998-06-25 |
Foreign References:
| EP0940154A2 | 1999-09-08 | |||
| US4338931A | 1982-07-13 | |||
| US4064878A | 1977-12-27 | |||
| EP0525720A1 | 1993-02-03 | |||
| US4069819A | 1978-01-24 | |||
| US5476093A | 1995-12-19 | |||
| FR2352556A1 | 1977-12-23 |
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