公开(公告)号：US20200206429A1

公开(公告)日：2020-07-02

申请号：US16615005

申请日：2017-12-06

Applicant: AMGEN INC

Inventor： Martin Hering ,  Brendan SMYTH

IPC: A61M5/315 ,  A61M5/145

Abstract: A drug delivery device includes a container for storing a drug having a longitudinal axis. A plunger rod aligned with the longitudinal axis of the container has a first end and a second end, where the second end is disposed within the container. A stopper is disposed in and movable relative to the container for expelling the drug, and a drive mechanism is operatively coupled to the first end of the plunger rod. The drive mechanism is configured to deliver a drive force to move the plunger rod along the longitudinal axis and through the container. A chamber disposed between a plunger rod and the stopper is adapted to oppose the drive force of the drive mechanism.