Patent ID: 9078983
Filing Date: 2015-07-14
Classification: A61M

Abstract:
1. A single-use injection device, comprising: a hub bearing a needle, having a proximal slot for engaging a thumb button and a distal surface for engaging a shield assembly; the shield assembly comprising an inner shield radially outward of the needle and having features engaging the hub, an outer shield radially outward of the inner shield adapted to cover the needle in an initial state and retain the inner shield in an initial position and to move proximally to release the inner shield from said initial position to a second position covering the needle after an injection, and an outer sleeve radially outward of the outer shield; a first spring biasing the inner shield in a distal direction covering the needle; a small-volume reservoir containing medication, adapted to be pierced by the needle to provide fluid communication with the needle cannula; and an axially displaceable thumb button having a tab engaging the proximal slot on the hub and enclosing the reservoir between the thumb button and the hub, the thumb button having a plunger engaging the reservoir to dispense medication from the distal end of the needle.