Patent ID: 8561609
Filing Date: 2013-10-22
Classification: A61M

Abstract:
1. A dry powder inhaler, comprising: an inlet channel through which air enters the inhaler; a chamber that receives air from the inlet channel, the chamber containing a single actuator to which a powdered medicament is adhered, wherein the chamber has a longitudinal axis, and wherein the inlet channel is generally co-axial with the longitudinal axis; a retaining member disposed at an end of the chamber opposite the inlet channel, the retaining member having one or more openings sized to permit air and the powdered medicament to pass through the retaining member, and to prevent the actuator from passing through the retaining member; and an outlet channel through which air and the powdered medicament leave the inhaler to be delivered to a patient, wherein the outlet channel is generally co-axial with the longitudinal axis of the chamber; wherein the geometry of the inhaler is such that a flow profile is generated within the chamber that causes the single actuator to repeatedly oscillate generally co-axially with the longitudinal axis, thus, by virtue of the repeated oscillations, detaching the powdered medicament from the surface of the actuator to be entrained by the air and delivered to the patient through the outlet channel.