CA3227842A1 — Dry powder medicament inhaler

USPTO Abstract

Provided is a dry powder inhaler (1) for delivering medicament from at least one medicament carrier (201) having a plurality of spaced-apart medicament doses. The inhaler comprises: a housing (3) having regions for accommodating unused and used portions of the medicament carrier; a mouthpiece component (5) extending from the housing and through which a user is able to inhale; a manifold (25) arranged in the housing and defining at least part of an air flow path extending from an air inlet to the mouthpiece, the manifold further defining a dispensing position for the medicament carrier; a dispensing mechanism arranged in the housing for moving a medicament dose of the medicament carrier to the dispensing position and for placing the medicament dose in fluid communication with the air flow path ready for inhalation by the user; and a mouthpiece cover (7) being rotatably connected to the housing for sequential movement about a rotation axis from a first position in which the mouthpiece component is completely covered to a second position in which the mouthpiece component is completely covered, and from the second position to a third position in which the mouthpiece component is completely uncovered. The mouthpiece cover is coupled to the dispensing mechanism such that movement of the mouthpiece cover drives the dispensing mechanism, wherein movement of the mouthpiece cover from the second position to the third position causes a medicament dose of the medicament carrier to be moved to the dispensing position, but movement of the mouthpiece cover from the first position to the second position does not causes the medicament dose to be moved. Also provided are arrangements in which the coupling of the mouthpiece cover to the dispensing mechanism is arranged to be non-linear, such that movement of the mouthpiece cover from a first position to a second position causes the medicament dose to be moved with a first movement ratio, and movement of the mouthpiece cover from the second position to a third position causes the medicament dose to be moved with a second movement ratio which is different to the first movement ratio.