A protective device for use with a hypodermic syringe for preventing accidental needle sticks after fluid has been ejected from the syringe and rendering the syringe non-reuseable. The protective device comprises a hollow, cylindrical casing defining a forward end wall having an opening therein, a rearward...http://www.google.es/patents/US5188614?utm_source=gb-gplus-sharePatente US5188614 - Hypodermic syringe needle containment assembly
