Patent ID: 8668670
Filing Date: 2014-03-11
Classification: A61M

Abstract:
1. An injection device, comprising: a housing; a syringe slideably mounted within the housing for movement between a shrouded retracted position relative to the housing and an extended injecting position relative to the housing; a movable bung slideably mounted in the syringe and moveable to expel a liquid dose through a needle couplable at a distal end of the syringe; a plunger having a distal end operable to move the bung and to transmit an expulsion force thereto, the plunger being in the form of a rod including: an actuating bias spring operable to drive the plunger to move the syringe from the shrouded retracted position relative to the housing to the extended injecting position relative to the housing, and to move the plunger forwardly within the syringe to act upon the bung to transmit the expulsion force thereto in order to expel the liquid dose from the syringe through the needle.