A piston rod and a drug delivery device incorporating the piston rod, wherein the piston rod comprises at least two axially aligned guideposts configured to engage a drive member of the drug delivery device

摘要

595343 A piston rod (20) for a device and a drug delivery device (1) incorporating the piston rod is disclosed. The piston rod comprises an elongated member having a distal end and a proximal end, wherein the proximal end has at least two sets of guideposts (24), and at least one set has at least two guideposts that are in axial alignment with each other and are configured for transmitting axial and rotational forces from a drive member having at least one internal groove (38).