Safety assembly for a syringe

A safety syringe support system comprising, in combination,

• a) an outer rigid sheath comprising plastic;
• b) an inner rigid sheath comprising plastic positioned partially within the outer sheath forming concentric tubes with neither sheath comprising a syringe body, where the inner and outer sheaths are configured to move independently and relative to each other from a start position to a final position, where the inner sheath has an inside portion configured to accept and hold a syringe having a needle attached to a distal end and where each sheath has a proximal end opposite a distal front end;
• c) at least two resilient tongues extending axially and proximally from the proximal end of one of the sheaths;
• d) a first component of a lock on the inner sheath;
• e) a second component of the lock on the outer sheath that is configured to engage the first component when the sheaths are in the final position to lock the inner sheath in an extended position and to prevent the sheaths from moving relative to each other;
• and
• f) a spring having a distal end bearing surface and a proximal end bearing surface positioned such that one of the bearing surfaces is in contact with the inner sheath such the spring exerts a biasing force when the sheaths are in the start position.