Patent ID: 7727201
Filing Date: 2010-06-01
Classification: A61M

Abstract:
1. A device for the dosed administration of an injectable product, comprising: a housing with a receptacle for the product; a drive mechanism movable via a dosing element supported displaceably in the housing, wherein the drive mechanism comprises engagement elements situated together in groups, each group comprising two or more engagement elements, a distance between the groups in a longitudinal direction corresponding to a maximum dosing amount of the injectable product and a distance between the engagement elements in the longitudinal direction corresponding to a priming amount of the injectable product, wherein the distance between engagement elements within the groups is substantially the same as the distance between engagement elements for each of the other groups; wherein the distance between groups is greater than the distance between engagement elements, and wherein the area on the drive mechanism between the groups comprises a circumferentially smooth area; and wherein the dosing element comprises an advancing sleeve displaceably supported in the housing and a dosing knob, the advancing sleeve coupled to the drive mechanism and to the dosing knob, said advancing sleeve configured to engage and disengage with the engaging elements and to transfer a propulsion force from the dosing knob to the drive mechanism, wherein the dosing knob moves the advancing sleeve in the longitudinal direction into and out of engagement with the engaging elements, such that the advancing sleeve moves along the circumferentially smooth area of the drive mechanism by the maximum dosing amount when the dosing knob is moved into a dosing state, and wherein when in the dosing state, the advancing sleeve moves to set a selected dose such that the maximum dosing amount is reduced.