Patent ID: 8118788

Claim:
A pre-filled hypodermic syringe molded of synthetic material comprising: a tubular body having an open first end and an open second end and containing a fluid to be administered to a patient, a plunger which, at one of its ends, has a piston mounted slidably in the tubular body and which passes through the opening of the first end of the tubular body, a connection tip in the form of a cone of a Luer-lock type, the connection tip is configured for the passage of the fluid that is to be administered and comprises a tubular part communicating with the opening of the second end, and a threaded part forming a neck and surrounding the tubular part, wherein the tip comprises an obturator connected by a frangible zone to the free end of the tubular part, the obturator is molded in one piece with the tip and the tubular body, the syringe comprises a cylindrical cap mounted on the tip, the cap has a zone of fixation or coupling to the obturator, such that rotation of the cap about its longitudinal axis moves the obturator in rotation in such a way as to cause the frangible zone to break, the zone of fixation or coupling is configured to form a hollow stub, the hollow stub is secured to the obturator, the obturator is non-rotatable relative to the hollow stub, and the syringe comprises a tamper-proof ring extending partly on the body of the syringe and partly on a skirt of the cap.