Patent ID: 8177745
Filing Date: 2012-05-15
Classification: A61M

Abstract:
1. A needle safety module for attaching to an injection device for administering a liquid product, said needle safety module comprising: a) a housing; b) a needle connected to the housing such that the needle cannot move axially, the needle having a distal needle tip; and c) a needle guard having a distal end, which can be placed against an injection point via its distal end and moves axially and non-rotatably relative to the needle or to the housing from an initial position in which the distal needle tip is covered, to an injection position in which the distal needle tip extends far enough out of the needle guard that the distal needle tip at least touches the injection point, and to an end position in which the distal needle tip is covered; wherein d) the needle guard moves by a predefined movement in the distal or the proximal direction between the initial position and the end position; wherein e) the needle guard is locked such that it cannot move axially relative to the needle or to the housing upon movement from the injection position to the end position; and wherein f) a distance the needle guard moves from its initial position to its injection position differs from a distance the needle guard moves from its injection position to its end position.