Patent ID: 6855129

Claim:
A Safety needle assembly comprising: a cylindrical housing having a top surface and a bottom surface, said housing having means for mounting said housing onto a medical injection device, a needle cannula mounted in the bottom surface, said needle cannula having a distal end located at a distal side of the bottom surface, a shield telescopically movable relatively to the housing for movement between a distal position where the shield covers the distal end of the needle cannula and a proximal position where at least a part of the distal end of the needle cannula is exposed, a spring located inside said housing urging the shield in the distal direction, a locking element provided inside the housing and having at least one outwardly pointing locking protrusion wherein said locking element is a separate part provided between the spring and the shield and longitudinal moved simultaneously with the shield relatively to the housing during use, whereby the locking protrusion provided on the locking element is guided from a first position where the shield is in the distal position, via a second position where the shield is in the proximal position to a third position where the shield is in the distal position and in which third position at least one of the locking protrusions is blocked by a blocking surface provided on the inside surface of the housing whereby further movement of the shield is irreversible immobilized.