Patent ID: 8038649
Filing Date: 2011-10-18
Classification: A61M

Abstract:
1. An injection device, comprising: a housing; a container holder arranged within said housing having a container adapted to contain medicament to be delivered through a needle attached to the container and a stopper sealingly and slidably arranged inside said container; an energy accumulating member arranged in the interior of the device and adapted to accumulate energy; a plunger drive mechanism, comprising a plunger rod driving member connected to said energy accumulating member and threadedly engaged to a plunger rod having a proximal end in contact with said stopper, and a non-rotating device arranged to be engaged to a longitudinal guide device on the plunger rod such that when said plunger rod driving member is rotated due to an output torque from the energy accumulating member, the plunger rod is linearly urged toward a proximal end of the device; and a container driver mechanism arranged to be fixedly connected to the container holder and to be releasably connected to the plunger rod, such that when said plunger rod is urged towards the proximal end of the device, the container holder is moved a predetermined distance toward the proximal end of the device, whereby a needle penetration is performed and whereupon continuous movement of said plunger rod forces said container driver mechanism to be released from said plunger rod whereby an injection is performed.