Five embodiments of a shield assembly for a syringe having a plunger barrel and a mounting at the other end of the syringe for receiving a needle hub, an inner sheath adapted for being secured to the syringe, an outer cylindrical sheath in telescoping relation on the inner sheath and movable between...http://www.google.fr/patents/US5242416?utm_source=gb-gplus-shareBrevet US5242416 - Shield assembly for needle syringes
