Metering valve for a metered dose inhaler providing consistent delivery

The present invention relates to the new design for the measurement valve which offers the consistency in which tablet supply was improved. The valve rod in which this measurement valve carries out outline demarcation of the direction axis line of (a) Nagate, it is a valve rod containing the main part part which has a measurement side, and the direction axis line of Nagate and the tangent plane to at least one copy of a measurement side demarcate the angle of about 2 to about 90 degrees generally, (b) It is partially demarcated with a main part wall at least, and has a valve main part which has an internal chamber containing the metering zone constituted so that the measurement side of a valve rod might be followed substantially.