US 12,029,882 B2
Autoinjector with shock reducing elements
Christopher R. Folk, San Diego, CA (US); and Scott Robert Gibson, Granada Hills, CA (US)
Assigned to AMGEN INC., Thousand Oaks, CA (US)
Filed by AMGEN INC., Thousand Oaks, CA (US)
Filed on Jun. 19, 2020, as Appl. No. 16/905,960.
Application 16/905,960 is a continuation of application No. 15/302,116, granted, now 10,722,655, previously published as PCT/US2015/029485, filed on May 6, 2015.
Claims priority of provisional application 61/990,063, filed on May 7, 2014.
Prior Publication US 2020/0316303 A1, Oct. 8, 2020
Int. Cl. A61M 5/31 (2006.01); A61M 5/20 (2006.01); A61M 5/315 (2006.01); A61M 5/32 (2006.01); F16F 9/16 (2006.01); F16F 9/32 (2006.01); F16F 9/348 (2006.01); F16F 9/36 (2006.01)
CPC A61M 5/3134 (2013.01) [A61M 5/20 (2013.01); A61M 5/2033 (2013.01); A61M 5/31511 (2013.01); F16F 9/16 (2013.01); F16F 9/3228 (2013.01); F16F 9/3481 (2013.01); F16F 9/361 (2013.01); A61M 2005/2086 (2013.01); A61M 2005/3143 (2013.01); A61M 5/3243 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An injection device for drug delivery, the injection device comprising:
a container for storing a drug, the container comprising a stopper movably disposed in the container for expelling the drug;
an injection drive mechanism comprising a plunger for acting on the stopper and an energy source for exerting a force on the plunger to cause the plunger to move in a distal direction to act on the stopper to expel the drug, the force causing the plunger to accelerate to a velocity prior to acting on the stopper; and
a damping mechanism for reducing the velocity of the plunger prior to acting on the stopper, the damping mechanism comprising energy absorbing material disposed on the plunger such that at least a portion of a proximally-facing surface of the energy absorbing material contacts at least a portion of a distally-facing surface of the plunger prior to any movement of the plunger in the distal direction,
wherein, prior to any movement of the plunger in the distal direction, a distally-facing surface of the energy absorbing material is spaced from a proximally-facing surface of the stopper.