Patent ID: 9566389
Date: 2017-02-14
CPC Classifications: A61M

Claim:
1. A locking arrangement for a medicinal drug administration device comprising: a) a sleeve with gear teeth on its inner circumference, b) a sleeve-shaped, one-piece coupling element comprising a longitudinal axis (L) surrounded over its circumference by the sleeve and having a first section and a second section, wherein the first section is connected with the second section via an elastically deformable intermediate section, the intermediate section comprising an engagement member for engaging the gear teeth on the inner circumference of the sleeve; and c) a torque application means for applying a torque in a first rotational direction about the longitudinal axis (L) to the first section of the coupling element, whereby the engagement member is releasably pushed by the torque into the gear teeth on the inner circumference, such that rotation of the coupling element relative to the sleeve is blocked in the first rotational direction, d) wherein said second section of the coupling element is twistable about the longitudinal axis (L) relative to the first section in the first rotational direction, resulting in elastic deformation of the intermediate section, whereby blocking in the first rotational direction by releasable engagement of the engaging member in the gear teeth on the inner circumference is released, such that rotation of the coupling element relative to the sleeve in the first rotational direction is enabled.