Patent ID: 9649453
Date: 2017-05-16
CPC Classifications: A61M

Claim:
1. A safety device for a pre-filled syringe, comprising: a hollow support body suitable for substantially containing and retaining the pre-filled syringe therein, such that a hypodermic needle of the pre-filled syringe protrudes from the support body in a distal direction; a hollow needle shield that shields the hypodermic needle of the pre-filled syringe contained within the hollow support body, wherein the needle shield comprises a plurality of substantially planar or convex side walls; a double-walled outer body comprising a plurality of outer side walls, the outer body being configured to telescope with respect to the needle shield, and each outer side wall being arranged parallel to one of the side walls of the needle shield; a spring made from a resilient plastics material, wherein the needle shield is telescoped with the support body, wherein the spring is arranged between the needle shield and the support body and biases the needle shield in the distal direction, wherein the spring comprises a plurality of generally L-shaped resilient spring leaves, each of the spring leaves being operably connected to a distal end wall of the needle shield and to a distal shroud of the support body to bias the distal end wall and the distal shroud away from each other, and wherein the distal shroud comprises a plurality of catches to inhibit translation of the spring leaves, each of the catches limiting translation of a corresponding spring leaf.