Patent ID: 9694141
Date: 2017-07-04
CPC Classifications: A61M

Claim:
1. A needle safety device comprising: a needle hub including a plurality of resilient arms having detents; a needle having a distal tip; a needle shield telescopically coupled to the needle hub, the needle shield including a plurality of axial slots adapted to engage the detents on the resilient arms and wherein the detents are axially movable in the slots and adapted to engage the slots so as to inhibit rotation of the needle shield relative to the needle hub, the needle shield including a plurality of grooves separated from the slots by separation walls and wherein the grooves are adapted to engage the detents; and a spring positioned between the needle hub and the needle shield; wherein, when the needle shield is in a first position relative to the needle hub, the needle shield covers the distal tip of the needle and the detents are positioned in proximal ends of the slots and are adapted to abut the separation walls to inhibit distal movement of the needle shield relative to the needle hub, wherein, when the needle shield is in a second position relative to the needle hub, the distal tip of the needle protrudes through an aperture in the needle shield and the detents are positioned in distal ends of the slots, and wherein, when the needle shield is in a third position relative to the needle hub, the needle shield covers the distal tip of the needle and the detents are engaged in the grooves, wherein the spring is configured to, when the needle shield is in the second position and is removed from an injection site, bias the needle shield into the third position such that the detents move through the proximal ends of the slots and bypass the separation walls, and wherein, in the third position, the detents are adapted to abut the separation walls to inhibit proximal movement of the needle shield relative to the needle hub.