Patent ID: 6325061
Filing Date: 2001-12-04
Classification: A61M

Abstract:
A powder inhaler for administering powder by inhalation, comprisinga powder delivery component including a multiple-does storage region and a mechanism for accessing a single dose at a time from said storage region,an inhalation channel that is positioned to receive powder from said mechanism of said powder delivery component so as to provide a first stream of air containing powder when air is drawn through said inhalation channel,a chamber which includes a base member and a peripheral wall member, said base member having a transverse surface extending across said peripheral wall member,wherein the chamber includes a first inlet through said surface through which said first stream of air containing powder is in use drawn into said chamber on inhalation by a user and a plurality of second inlets at the junction between the base member and the peripheral wall member at said surface through which a plurality of second streams of air of combined lesser flow than the first stream of air are in use drawn on inhalation by a user so as to minimize retention of powder at the junction between the base member and the peripheral wall member at said surface.