Safety syringe

A safety syringe comprising a hollow barrel, a needle hub, a plunger and a cord;

• the hollow barrel being cylindrical and having
• a distal open end;
• a proximal open end;
• an inside surface;
• an outside surface;
• an inner space;
• an annular flange defined radially around and extending out from the distal open end;
• a lip defined radially around and extending inward from the proximal open end of the hollow barrel;
• a distal annular rib defined on the inside surface of the hollow barrel near the lip;
• and
• a central annular rib defined inside the hollow barrel equidistance between the open proximal end and the open distal end;
• the needle hub detachable engaged to the distal annular rib inside the proximal open end of the hollow barrel and having
• an inside surface;
• an outside surface;
• a needle attached to the outside surface of the needle hub and having a fluid passage communicating with the inner space of the hollow barrel;
• a longitudinal passage defined through the needle hub from the outside surface to the inside surface to receive with one end of the needle;
• the plunger mounted inside the hollow barrel having
• a push rod having
• a proximal end;
• and
• a seal having
• an outside surface attached to the proximal end of the push rod;
• and
• an inside surface;
• and
• the cord having
• a seal end attached to the inside surface of the seal;
• and
• a hub end attached to the inside surface of the needle hub,
• wherein a distance between the proximal open end of the hollow barrel and the central annular rib is greater than a combined length of the needle hub and the needle.