Rosie Burnell;Thomas Kemp;Matthew Ekman;Simon Francis Brereton
发明人:
Simon Francis Brereton,Thomas Kemp,Rosie Burnell,Matthew Ekman
申请号：
US13985021
公开号：
US09623181B2
申请日:
2012.02.16
申请国别(地区):
US
年份:
2017
代理人:
摘要：
The invention relates to an auto-injector for administering a dose of a liquid medicament, comprising:an elongate tubular case,a carrier subassembly comprising a tubular carrier slidably arranged inside the case, the carrier adapted to contain a syringe with a hollow injection needle, a drive spring and a plunger for forwarding load of the drive spring to a stopper of the syringe, wherein the syringe is lockable for joint axial translation with the carrier, wherein the drive spring acts between the carrier and the plunger,wherein the plunger in an initial state is locked to the carrier by a ramped engagement to the carrier and by being prevented from rotating out of this ramped engagement depending on a relative longitudinal position of the carrier in the case, wherein the plunger is arranged to be released for rotating out of the ramped engagement upon the needle reaching at least nearly a predefined injection depth on translation of the carrier in the proximal direction for advancing the needle beyond a proximal end of the auto-injector.
