Patent ID: 9539392
Date: 2017-01-10
CPC Classifications: A61M

Claim:
1. A front-end device of an auto-injector (A) for administering a dose of a liquid medicament, comprising a support sleeve with a first screw thread adapted to engage a housing of a back-end device of the auto-injector (A) to attach the front-end device to the back-end device and an outer sleeve mounted onto a support sleeve of the front-end device by a second screw thread, wherein the front-end device is adapted to receive a syringe with an injection needle and a barrel containing the dose of the medicament and wherein the direction of rotation of the first screw thread is opposite to the direction of rotation of the second screw thread, and wherein a support collar separates the first screw thread from the second screw thread and a latch formed to the outer sleeve is arranged to latch to the support collar of the support sleeve to initially prevent a relative rotation between the outer sleeve and the support sleeve.