Patent ID: 8900202
Filing Date: 2014-12-02
Classification: A61M

Abstract:
1. Drive mechanism for a drug delivery device for dispensing of a dose of a medicinal product, comprising: a holder for a product-containing cartridge, the cartridge having a piston slidably arranged therein in an axial direction, a piston rod to be operably engaged with the cartridge's piston for dispensing of a dose of the medicinal product, an adjusting assembly adapted to eliminate axial clearance between the piston and the piston rod, characterized in that the adjusting assembly comprises a receptacle adapted to slidably receive a distal end section of the piston rod and further comprises at least one radially extending spike element adapted to pierce the piston rod and/or to pierce a side wall of the receptacle for mutually locking in position the piston and the piston rod irrespective of the relative distance between piston and piston rod.