Patent ID: 7189216

Claim:
A self-destructive safety syringe comprising: a) a hollow barrel having a front-end connecting holder having a retaining ring located on an interior thereof; and b) a plunger having a plug member movable between slidable and locked positions and having: I) a coupling member having an inclined guide face having an exterior surface inclining outwardly when moving in a direction from a first end to a second end of the plunger; ii) a stem member located on the first end of the plunger and extending outwardly from the inclined guide face, the stem member is selectively inserted into the front-end connecting holder; and iii) a lengthwise long slit located in a side of the stem member and the coupling member, the lengthwise long slit is spaced apart from the first end of the plunger; wherein, when the plunger is located in the slidable position, the inclined guide face of the coupling member is spaced apart from the retaining ring of the front-end connecting holder, the plug member is slidable along the interior of the hollow barrel, and when the plunger is located in the locked position, the stem member and the coupling member are inserted into the front-end connecting holder, the retaining ring engaging the inclined guide face and fixing the stem member and the coupling member in the front-end connecting holder.