Yannick Hourmand,Simon Brereton,Thomas Mark Kemp,Rosie Burnell,Matthew Ekman
申请号:
US14364242
公开号:
US09511194B2
申请日:
2012.12.19
申请国别(地区):
US
年份:
2016
代理人:
摘要:
Described is an autoinjector comprising a case, a needle shroud slidably arranged in the case, a chassis slidably arranged in the case and rotatably coupled to the needle shroud, 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. Axial movement of the needle shroud relative to the case causes rotation of the chassis relative to the needle shroud. The 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.