Patent ID: 6719722
Filing Date: 2004-04-13
Classification: A61M

Abstract:
A safety syringe comprising a hollow barrel, a plug, 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 annular flange formed radially around extending out from the distal open end; a lip formed radially around and extending inward from the proximal open end of the hollow barrel; a proximal annular rib defined inside the hollow barrel near the lip and a central annular rib defined inside the hollow barrel; the plug detachably engaged with the proximal annular rib inside the proximal open end of the hollow barrel and having a top surface; a bottom surface; a hub recess being tapered and defined through the plug from the top surface to the bottom surface; and a needle hole defined through the plug; the needle hub mounted in the plug and having a connecting tube being tapered and having a distal end and a proximal end; and a needle attached to the proximal end of the connecting tube and having a central passage; the plunger having a push rod being mounted inside the hollow barrel and having a proximal end; and a seal having a top surface attached to the proximal end of the push rod; and a bottom surface; and the cord connected between the plug and the plunger and having a top end attached to the bottom surface of the seal; and a bottom end attached to the top surface of the plug; wherein a distance between the proximal end of the hollow barrel and the central annular rib is greater than a combined length of the needle hub and the plug.