A guard for a syringe that includes a needle, a needle protector cap, and a barrel with an outer diameter smaller than the needle protector cap. The guard includes a body having a cavity for receiving the syringe therein, and a shield that is slidable between an unguarded position wherein the needle...http://www.google.sh/patents/US6872194?utm_source=gb-gplus-sharePatent US6872194 - Disposable self-shielding syringe guard
