Patent ID: 8728027

Claim:
A safety needle assembly comprising: a cylindrical housing having a top surface and a bottom surface, the housing being adapted to mount onto a medical injection device, a needle cannula mounted in the bottom surface, the 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 first distal position where the shield covers the distal end of the needle cannula when the needle assembly is in an unused condition, a proximal position where at least a part of the distal end of the needle cannula is exposed, and a second distal position where the shield is locked in a position covering the distal end of the needle cannula when the needle assembly is in a used condition, a spring located inside the housing urging the shield in the distal direction, and a locking element provided inside the housing and having at least one locking protrusion, the locking element being a separate part, the at least one locking protrusion engaging the housing in that the locking protrusion is blocked by a blocking surface provided on the inside surface of the housing to irreversibly lock the shield in the second distal position when the needle assembly is in the used condition, the housing is provided with at least one transparent area wherein through the transparent area a colored part on the shield and/or on the locking element is visible when the needle assembly is in the unused condition indicating that the safety needle assembly is ready for use, and wherein the at least one locking protrusion is provided with an indication which can be viewed through the transparent area when the needle assembly is in the used condition indicating that the safety needle assembly has been used.