Patent ID: 8496627

Claim:
A passive safety shield device comprising: an inner sheath having a proximal end and a distal end and defining a longitudinal channel which extends between the proximal and distal ends and is dimensioned to receive an injection device having a plunger; an outer sheath having a proximal end and a distal end and defining a longitudinal channel dimensioned to slidably receive the inner sheath; a biasing member supported within the outer sheath, the biasing member being positioned to urge the outer sheath from a retracted position to an advanced position in relation to the inner sheath; and a deformable ring positioned on the proximal end of the safety shield device, the deformable ring being deformable from an undeformed condition to a deformed condition in response to actuation of the plunger of the injection device, the deformable ring in its undeformed condition being configured to retain the outer sheath in the retracted position; wherein in its deformed condition, the deformable ring is configured to allow movement of the outer sheath in relation to the inner sheath from the retracted position to the advanced position.