Powder inhaler

A powder inhaler, comprising:

• a casing having a mouthpiece;
• an inhalation channel housed in the casing and connected to the mouthpiece;
• a container housed in the casing for storing a powdered medicament;
• a metering device comprising a shuttle having a dosing recess, wherein the shuttle is movable between a filling position, in which the dosing recess is in alignment with an opening of the container and faces said opening so as to be filled with a dose of the powdered medicament, and an inhalation position, in which the dosing recess is in alignment with the inhalation channel, for enabling inhalation of the dose of the powdered medicament contained in the dosing recess through the mouthpiece;
• and
• a sealing device operationally active at a coupling zone of the shuttle with the container when the shuttle is in the filling position, said coupling zone circumscribing the dosing recess and the opening.