Patent ID: 6669667
Filing Date: 2003-12-30
Classification: A61M

Abstract:
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.