Patent ID: 6733475
Filing Date: 2004-05-11
Classification: A61M,Y10S

Abstract:
A safety syringe, which is to mount a needle, comprising:a barrel having a tubular body defining a receiving hole, a projection disposed in one end of said tubular body, and an insertion hole axially extended through said projection; a needle holder mounted in the receiving hole of said barrel and for holding the needle outside said tubular body of said barrel, said needle holder having a dragged portion; a stopper mounted in said receiving hole of said barrel for axial movement between two ends of said barrel, said stopper having a drag portion adapted for engaging into the dragged portion of said needle holder for enabling said needle holder to be moved backwards with said stopper in said barrel, and a plunger connector; and a plunger inserted into the insertion hole of said barrel, said plunger having a stopper connector engaged into the plunger connector of said stopper for enabling said stopper to be moved with said plunger; wherein when pulled said plunger backwards to carry said stopper, said needle holder and said needle backwards on end of said barrel, said plunger connector of said stopper is forced by the projection of said barrel to expand, thereby causing said stopper to be disengaged from said plunger for enabling said plunger to be removed from said barrel.