Patent ID: 8066002

Claim:
A manifold for use in a medicament dispenser device for the delivery of medicament powder from an open blister pocket of a blister pack, the manifold comprising a body, said body defining a chimney having a chimney inlet, a first chimney exit and a second chimney exit for directing an airflow from said chimney inlet to said first chimney exit and said second chimney exit; the body further defining a chamber having a chamber inlet and a chamber exit, wherein the first chimney exit and said chamber inlet lie side-by-side each other such that when said open blister pocket of said blister pack is positioned adjacent thereto said airflow may be directed from the first chimney exit to the chamber inlet via the open blister pocket to entrain said medicament powder and enable transport thereof in the airflow from the chamber inlet to said chamber outlet, and the second chimney exit enters the chamber between the chamber inlet and chamber exit, and wherein the manifold is arranged to reduce the amount of airflow through the open blister pocket such as to delay the emptying of the medicament powder from the blister pocket until a predetermined flow rate through the manifold chamber is achieved by the inhaling patient, by the provision of a flow director within the chimney adapted such that, when airflow through the chimney is below a predetermined flow rate, the flow director directs airflow via the second chimney exit directly into the chamber, and when airflow through the chimney is above the predetermined rate, the flow director directs airflow towards the blister pocket via the first chimney exit.