Patent ID: 6109261
Filing Date: 2000-08-29
Classification: A61M,G05D

Abstract:
A device for controlling the administration of inhalation medicament comprising an air inlet, an air outlet and airflow regulating means, said means comprising a movable obstructing means adapted to reduce the cross-sectional area of the pathway at a location between the air inlet and the air outlet and biasing means, the obstructing means being biased into a first resting position in which the cross-sectional area of the pathway is maximum and being adapted to move against the bias of the biasing means to a second position in which the cross-sectional area of the pathway is less than maximum in response to a pressure fall at the air outlet, wherein the airflow regulating means further includes second movable obstructing means adapted to reduce the cross-sectional area of the pathway at a location between the air inlet and the air outlet and second biasing means, the second obstructing means being biased into a first resting position in which the cross-sectional area of the pathway is minimum and being adapted to move against the bias of the biasing means to a second position in which the cross-sectional area of the pathway is more than minimum in response to a pressure fall at the air outlet.