Patent ID: 8585658
Filing Date: 2013-11-19
Classification: A61M,Y10T

Abstract:
1. A drug delivery device for dispensing medicament, comprising: a medicament cartridge, wherein the cartridge comprises (i) a distal end, (ii) a proximal end that is opposite the distal end along a body axis of the cartridge, and (iii) a movable piston arranged substantially at the proximate end of the cartridge; a piston rod for axially moving the piston in the distal direction, wherein the piston rod comprises an axial bore extending from a proximal end of the piston rod to a point substantially at a distal end of the piston rod; an adjusting member located at least partially between the piston rod and a proximal face of the piston, wherein the adjusting member is configured to abut the proximal face of the piston to effectively eliminate an axial clearance between the piston rod and the proximal face of the piston when a locking rod is positioned in the axial bore of the piston rod; and where the locking rod is positioned in the axial bore of the piston rod such that the piston rod is secured to the adjusting member and does not contact the proximal face of the piston.