EP0794805A1 — Dose indicating device

USPTO Abstract

Dose indicating device to be provided on an inhalator, preferably a breath-actuated dry-powder inhalator, designed for containing multiple doses of a medicament containing an active substance, the inhalator having operating means comprising a manoeuvering element for loading one dose of the medicament to a dosing unit and providing said dose in a position for inhalation, wherein the dose indicating device is provided as a separate unit to be placed on the manoeuvering element of the inhalator and in that it comprises a first element to be provided on and around the outer wall surface of the manoeuvering element of the inhalator; a second element provided on and around the outer surface of said first element, the second element being rotatable relative to said first element; interrupting means provided on said first and second elements limiting the length of the relative movement between said elements; and registration/indication for registration of the movement of said manoeuvering element and thereby the feeding of a dose to the inhalation channel when the inhalator is activated for inhalation said registration/indication means being provided as parts of said first and second elements.