Dry powder medicament inhalator having an inhalation-activated flow diverting means for triggering delivery of medicament

An inhaler dry powder medicament (400) a housing including a body provided comprising: - a step of primary air flow (534) extending through the body to allow airflow through the body; - An element flow restriction (628) disposed in the flow passage of primary air so that the air passing through the passage of primary air flow moves the element for limiting the flow between a first position, nonlimiting and a second limiting position, wherein the flow restricting member restricts airflow through the passage of primary air flow; - A step of secondary airflow (538) extending at least partially through the body; - A locking element (546) disposed in communication with the passage of secondary air flow for selectively preventing airflow through the passage of secondary air flow, the locking element being movable between a first closed position to block airflow through the passage of secondary airflow and a second open position in which the locking member does not block airflow through the passage of secondary air flow, wherein the restricting member flow is disposed in communication with the locking element, so that displacement of the element for limiting the flow to the second position moves the locking element to the second position and wherein the displacement of the locking element to the first position displaces flow restricting element to the first position; - Means for selectively moving the locking member between the first and second positions; and characterized by: - ​​gear means (622, 636) disposed functionally between the element for limiting the flow and the locking element such that the displacement of the flow limitation rotates the gear means and the displacement element locking means rotates gear.