Patent ID: 6613023
Filing Date: 2003-09-02
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 which when moved in a feed direction towards an outlet of said reservoir forces product out of said reservoir; c) a gear rack moving said piston in said feed direction, comprising a first series of teeth and a second series of teeth; d) a drive member movable relative to said casing in and counter to said feed direction, and slaving said gear rack when moved in said feed direction; and e) at least two blocking means arranged secured against shifting relative to said casing each co-operating with one of said series of teeth such that said blocking means prevent said gear rack from being moved counter to said feed direction and allow said gear rack to be moved in said feed direction by giving elastically, wherein said blocking means do not fully mesh with the tooth gaps of said series of teeth simultaneously, when said gear rack is moved; wherein f) said second series of teeth comprises an elongated tooth gap with which said blocking means co-operating with said second series of teeth meshes, when said gear rack assumes a starting position prior to a first administering.