CA3227856A1 — Dry powder medicament inhaler

USPTO Abstract

Disclosed are dry powder inhalers for delivering medicament to a user from a blister pack, the blister pack having a plurality of spaced-apart blister pockets containing doses of the medicament. The inhalers comprise: a housing for accommodating unused and used portions of the blister pack together with a dispensing mechanism for selectively opening the blister pockets; and a manifold component through which air can be drawn in use of the inhaler. The manifold component comprises: a primary air inlet opening for receiving first external air; an air outlet opening for providing the external air from the primary air inlet opening into an opened blister pocket, the primary air inlet opening being fluidly connected to the air outlet opening by a primary air delivery conduit formed in the manifold component; a medicament inlet opening for receiving air-entrained medicament from the opened blister pocket, the air outlet opening and the medicament inlet opening being arranged side-by-side to enable simultaneous communication with the opened blister pocket; and a medicament outlet opening for delivery of the air-entrained medicament from the opened blister pocket to the user, the medicament inlet opening being fluidly connected to the medicament outlet opening by a medicament delivery conduit formed in the manifold component. The disclosed inhalers embodiments provide a variety of improvements to the design of the manifold component.