Patent ID: 11969544
Assignee: NORTON (WATERFORD) LIMITED
Field: Measurement (Instruments)
Classification: CPC A  G | IPC A  G

Claim 18:
19. An inhaler for the inhalation of powder medication, the inhaler having an inhaler body and at least one reservoir containing powder medication, the inhaler body defining an air inlet and an outlet for transmission to a patient of air entering the inhaler body through the air inlet and powder medication, the outlet comprising a primary outlet for transmitting dry powder medicament entrained in air and at least one secondary outlet for transmitting a bypass flow of air,
the inhaler further comprising a deagglomerator, located within the inhaler body, the deagglomerator including a swirl chamber, at least one swirl chamber inlet port for transmitting air without powder medicament, and a single swirl chamber medicament inlet for transmitting air with powder medicament,
wherein the air inlet defined by the inhaler body is a sole air inlet shared by all of the primary outlet, the at least one secondary outlet, the at least one swirl chamber inlet port for transmitting air without powder medicament, and the swirl chamber medicament inlet for transmitting air with powder medicament, wherein a single delivery passageway leads from the air inlet of the inhaler to the swirl chamber medicament inlet of the deagglomerator, and wherein the primary and secondary outlets being configured to produce a plume of particulate substance emitted from the inhaler, said plume having one or more of a cone angle of the plume which is less than 35 degrees, a plume angle of from about 95 degrees to about 100 degrees, and/or, at a plane 3 cm away from the outlet, a cross sectional area which is less than 6 cm2 or has a ratio of maximum to minimum cross-dimensions which is less than 1.8.