Patent ID: 9078976
Filing Date: 2015-07-14
Classification: A61M,Y10T

Abstract:
1. A drive mechanism for use in a drug delivery device, comprising; a main housing having a proximal and a distal end; a drive member located within the housing such that the drive member is movable longitudinally and is non-rotatable with respect to the housing; a piston rod that is non-rotatable with respect to the housing and is adapted to operate through the housing and transfer a force in the longitudinal direction to the distal end of the drug delivery device; a rotating member releasably engaged with the piston rod and engaged to the drive member and engaged to the said housing wherein the rotating member comprises a carrier plate having pawl arms and a gear, wherein, when the drive member moves proximally with respect to the housing, the rotating member moves proximally with respect to the piston rod, and wherein the gear is located within a channel of the piston rod.