<p>An inhaler for producing an inhalable aerosol of a powdered medicament includes an aerosolising device in the form of a vortex chamber 1. The vortex chamber 1 has a curved wall 12, a tangential inlet port 3 and an axial exit port 2. The radius R of the vortex chamber 1 decreases with angular extent r from the inlet port 3. The vortex chamber 1 may include a ramp 20 which reduces the height of the chamber with angular extent r . The reduction in effective cross-sectional area of the vortex chamber accelerates the gas flow between the inlet 3 and the outlet 2 to reduce deposition of the medicament.</p>
申请公布号
AT403459(T)
申请公布日期
2008.08.15
申请号
AT20020740587T
申请日期
2002.05.10
申请人
VECTURA DELIVERY DEVICES LIMITED
发明人
EASON, STEPHEN WILLIAM;EDGSON, RAYMOND ANTHONY;HARMER, QUENTIN JOHN;CLARKE, ROGER WILLIAM;PINON, JOHN