Patent ID: 8663174

Claim:
A hub assembly for a pen injection device, comprising: a hub for connecting to the pen injection device; a needle received by said hub; a shield movably connected to said hub such that said shield is positionable in at least one of a plurality of positions prior to injection; a plurality of flexible arms extending outwardly from an end of said hub to engage an inner surface of said shield to create a friction fit therebetween; a channel formed in said shield; a tab on at least one of said flexible arms and movably received by said channel, thereby guiding movement of said shield relative to said hub as said tab moves through said channel, said channel having connected first and second substantially parallel axial sections through which said tab is movable and each of said first and second axial sections having first ends preventing further rearward axial movement of said tab therein and second ends for exposing the needle for an injection; and a flexible finger disposed in said channel such that when said tab passes over said flexible finger said shield becomes locked to said hub and is substantially prevented from moving.