Patent ID: 6699224
Filing Date: 2004-03-02
Classification: A61M

Abstract:
A device for administering an injectable product in doses, comprising:a) a casing, comprising a reservoir for said product; b) a piston, forcing product out of said reservoir when moved in a feed direction towards a reservoir outlet; c) a drive member, which may be moved along a sliding axis in said feed direction up to a proximal end position, and counter to said feed direction up to a distal end position; d) a driven member, which is prevented from moving counter to said feed direction, and is slaved by said drive member when said drive member is moved in said feed direction, so moving said piston in said feed direction; e) a dosing member, which may be rotated about said sliding axis of said drive member, to set the product dosage to be administered; f) wherein in said distal end position, said drive member and said dosing member abut via at least one dosage stopper each, one of which is provided on said drive member and the other on said dosing member; and wherein g) at least one of said dosage stoppers at least partially encircles said sliding axis of said drive member in the form of a spiral exhibiting a continuous course with a constant pitch.