Patent ID: 6102893
Filing Date: 2000-08-15
Classification: A61M

Abstract:
A ready-to-use prefilled syringe device for medical use by a user, comprising:a hollow injection needle;a tubular body having a nosepiece for housing the hollow injection needle such that the hollow injection needle communicates with an interior of the tubular body;a piston that is slidable inside of the tubular body opposite to the nosepiece, the piston is actuatable from a back end of the tubular body at an outside extremity of the piston by the user and is held with respect to the tubular body in a predetermined position in which an inside extremity of the piston determines an effective inside space that is at least partially filled with a dose of a medicinal liquid;a cover mounted coaxial to and in a sliding manner on the tubular body to provide protection after an injection, the cover is of a length sufficient to completely encase the hollow injection needle in a forward position protruding from a front end of the tubular body, the cover is held in a retracted position on the tubular body;a protective cap having a first end and a second end, the first end is attached to the front end of the tubular body to protect the nosepiece of the tubular body;inviolability means for preventing contamination having a low resistance, ring shaped rip line, the inviolability means is provided proximate to where the first end of the cap contacts the cover; andan annular retainer ring provided at the first end of the cap, the annular retainer ring being firmly affixed to the tubular body on the front end of the tubular body and is connected to the rest of the cap by the inviolability means, wherein the cap is held with respect to the cover in such a manner that the cap blocks any sliding movement of the cover, and the cover remains in the retracted position as long as the cap is not separated from the tubular body.