Matthew Ekman,Timothy Donald Barrow-Williams,Yannick Hourmand
申请号：
US13579435
公开号：
US20130150801A1
申请日:
2011.02.16
申请国别(地区):
US
年份:
2013
代理人:
摘要：
The invention relates to an auto-injector (1) for administering a dose of a liquid medicament (M), comprising:an elongate housing (2) arranged to contain a syringe (3) with a hollow needle (4) and a stopper (6) for sealing the syringe (3) and displacing the medicament (M), the housing (2) having a distal end (D) and a proximal end (P) with an orifice intended to be applied against an injection site, wherein the syringe (3) is slidably arranged with respect to the housing (2),spring means (8) capable of, upon activation: pushing the needle (4) from a covered position inside the housing (2) into an advanced position through the orifice and past the proximal end (P),operating the syringe (3) to supply the dose of medicament (M), andretracting the syringe (3) with the needle (4) into the covered position after delivering the medicament (M),activating means (20) arranged to lock the spring means (8) in a pressurized state prior to manual operation and capable of, upon manual operation, releasing the spring means (8) for injection. The spring means (8) is a single compression spring (8) arranged to be grounded at a distal end (8.1) in the housing (2) for advancing the needle (4) and for injecting the dose of medicament (M) via a plunger (9) and wherein the compression spring (8) is arranged to have its ground in the housing (2) switched to its proximal end (8.2) for retracting the syringe (3).
