EP4169557A1 — Inhalers and airflow adaptors therefor

USPTO Abstract

An inhaler for the inhalation of powder medication, the inhaler having a body and at least one reservoir containing powder medication, the body having an air inlet and an outlet for the transmission to a patient of air entering the body through the air inlet and powder medication, the outlet comprising a primary outlet for the transmission of dry powder medicament entrained in air as well as at least one secondary outlet for the transmission of a bypass flow of air, andthe body of the inhaler having a swirl chamber for deagglomerating the powder medication and the primary and secondary outlets being configured to produce a plume of particulate substance emitted by the inhaler with a plume angle of from about 95 degrees to about 100 degrees; orthe primary and secondary outlets being configured to produce a plume of particulate substance emitted by the inhaler having a cone angle of the plume which is less than 35 degrees; orthe primary and secondary outlets being configured to produce a plume of particulate substance emitted by the inhaler which at a plane 3 cm away from inhaler exit has a cross sectional area which is less than 6 cm<sup>2</sup> ; orthe primary and secondary outlets being configured to produce a plume of particulate substance emitted from the inhaler which at a plane a distance 3 cm from inhaler exit has a ratio of maximum to minimum cross-dimensions which is less than 1.8.