Patent ID: 9623183
Date: 2017-04-18
CPC Classifications: A61M

Claim:
1. An engine for an auto-injector for administering a dose of a liquid medicament, the engine comprising: a case having a distal end and a proximal end arranged to be attached to a packaged syringe containing a syringe with a hollow needle and a stopper for sealing the syringe and displacing the medicament, wherein the syringe is slidably arranged with respect to the case, the case containing wherein the drive is arranged as a gas spring comprising a cylinder and a piston with a plunger for transmitting a force of the gas spring, wherein a compressed gas is provided in a high pressure cavity defined between the piston and a distal end of the cylinder, wherein the cylinder is slidably arranged in the case, and wherein a latch is arranged to inhibit translation between the cylinder and the case and to be disengaged by the gas spring in a released state being at least nearly fully extended thus allowing the gas spring in an extended state to be translated in a distal direction.