Patent ID: 7462168

Claim:
A passive safety shield system for an injection pen needle, comprising: a needle hub; a needle mounted on the hub and having an injection end and a non-injection end, wherein the hub has a recess surrounding the non-injection end of the needle to receive a pen-injector; an injection end shield moving coaxially on the hub and having an aperture to permit passage of the needle through the injection end shield; a substantially tubular sleeve moving coaxially on the hub; a shield fastening element on the sleeve cooperating with a corresponding element on the injection end shield to fasten the injection end shield to the sleeve; a hub fastening element on the sleeve cooperating with a corresponding element on the hub to fasten the hub to the sleeve; a spring biasing the injection end shield toward the injection end of the pen needle; wherein the sleeve is engaged with the hub and the injection end shield to hold the injection end shield in a position covering the injection end of the needle before an injection, and to lock the injection end shield in a position covering the injection end after an injection or in the event of an accidental use; and wherein the hub fastening element on the sleeve comprises a flexible arm having an alignment tab which cooperates with a first retaining recess at a first axial position on the hub and a second lockout recess at a second axial position on the hub.