DOSE INDICATOR Russian patent published in 2000 - IPC

FIELD: medicinal engineering. SUBSTANCE: dose indicator is applicable in inhaler, preferably, in dry powder inhaler and designed for containing many doses of drug with active substance. Inhaler has control means with movable member for loading of one dose of drug into dosing device and placing dose to position of inhalation. Dose indicator is made in the form of separate unit placed on inhaler movable member and contains the first member installed on outer surface of wall of inhaler movable member and round said surface; the second member installed on outer surface of the first member and round it, and made for rotation round the first member; interrupting means provided on the first and second members and limiting the length of relative motion of members; and means for counting and indication for metering of motion of movable member and supply of dose to inhalation channel when inhaler is put into operation for inhalation. Means for metering and indication are made as components of the first and second members. EFFECT: higher dose accuracy and simplified design. 17 cl, 10 dwg