Patent ID: 7448342
Filing Date: 2008-11-11
Classification: A61M,G06M

Abstract:
1. Step-action indexing mechanism, in particular for hand-held units for apportioned delivery of inhaler medicaments, having an annular housing encircled, around its longitudinal axis, by a scale ring which is moved in a stepwise manner by indexing fingers which pivot, counter to spring loading, in the direction of a plane perpendicular to the longitudinal axis of the housing during the actuating stroke and thus via toothed engagement means cause the scale ring to rotate, characterized in that an annular part, which is disposed in a rotationally fixed manner in the housing, has at least one slot which extends obliquely upward from the lower peripheral edge for the insertion of a guide pin of a step-action indexing-finger star, the step-action indexing fingers of which extend from a central hub, in opposite directions, directed obliquely upward in the form of a secant, and, during the actuating stroke, counter to their inherent spring stressing, enter, moving inwardly, into the toothed engagement means in order to rotate the scale ring.