초록 ▼

An inhalation-activated inhalator having a flow diverting means wherein the primary air flow channel is blocked for a brief period during inspiration with air flow during that period passing through a dosing chamber arrangement and connecting passage to inject medicament into the inspired air stream

An inhalation-activated inhalator having a flow diverting means wherein the primary air flow channel is blocked for a brief period during inspiration with air flow during that period passing through a dosing chamber arrangement and connecting passage to inject medicament into the inspired air stream is provided. By diverting the inspired air stream in this fashion, powdered medicament may be provided for inhalation at a particular point in the patient\s inspiration cycle, thereby optimizing the delivery of medicament to the lungs.

대표청구항 ▼

A dry powder medicament inhalator comprising (I) a cavity for receiving a dry powder medicament packet, (II) a primary airflow circuit having an entrance and an exit for enabling air to flow therethrough, and (III) a secondary airflow circuit, the two circuits being fluidly connected to each other,

A dry powder medicament inhalator comprising (I) a cavity for receiving a dry powder medicament packet, (II) a primary airflow circuit having an entrance and an exit for enabling air to flow therethrough, and (III) a secondary airflow circuit, the two circuits being fluidly connected to each other, and the primary airflow circuit having disposed therein an air restricting flap (i) that is movable, from a normal resting position to a maximally restricted position which blocks a major portion of airflow through the primary airflow circuit, by airflow provided in the primary airflow circuit from inhalation by a patient on the inhalator, and (ii) that is connected by a biasing spring to a movable blocking plate, such that: (A) when the flap is in its normal resting position simultaneously the plate is in its normal resting position and blocks fluid connection between the primary airflow circuit and the secondary airflow circuit, whereby airflow through the secondary circuit is prevented, and (B) when the flap is in a restricted position from being moved by airflow provided in the primary airflow circuit from inhalation by a patient on the inhalator simultaneously the plate is moved by the flap, via the biasing spring, to a retracted open position and opens fluid connection between the primary airflow circuit and the secondary airflow circuit, whereby airflow occurs both through the primary airflow circuit and the secondary airflow circuit, and whereby the cavity as fluid connection with the primary airflow circuit via the secondary airflow circuit.