Yannick Hourmand,Simon Brereton,Thomas Mark Kemp,Rosie Burnell,Matthew Ekman
申请号：
US15821166
公开号：
US20180093046A1
申请日:
2017.11.22
申请国别(地区):
US
年份:
2018
代理人:
摘要：
Described is an autoinjector comprising a case, a chassis slidably arranged in the case, a syringe carrier operably coupled to the chassis, an outer plunger selectively engaged to the chassis, an inner plunger selectively engaged to the outer plunger, and a drive spring applying a biasing force to the outer plunger. The biasing force is applied to the inner plunger when the inner plunger is engaged to the outer plunger. Rotation of the chassis causes the inner plunger to rotate relative to the outer plunger and disengage the outer plunger to remove the biasing force from the drive spring on the inner plunger. When the inner plunger disengages the outer plunger, the biasing force of the drive spring pushes the chassis to retract the syringe carrier relative to the case.
