Patent ID: 9511194
Filing Date: 2016-12-06
CPC Classification: A61M

Claim Text:
1. An autoinjector comprising: a case; a needle shroud slidably arranged in the case; a chassis slidably arranged in the case, the chassis rotatably coupled to the needle shroud; an outer plunger selectively engaged to the chassis; an inner plunger selectively engaged to the outer plunger; and a drive spring applying a biasing force to the outer plunger, the biasing force being applied to the inner plunger when the inner plunger is engaged to the outer plunger, wherein axial movement of the needle shroud relative to the case causes rotation of the chassis relative to the needle shroud, and wherein the rotation of the chassis causes the inner plunger to rotate relative to the outer plunger and disengage the outer plunger to remove the biasing force from the drive spring on the inner plunger.