Patent ID: 6936027
Filing Date: 2005-08-30
Classification: A61M

Abstract:
1. A safety syringe comprising: (a) a hollow barrel being cylindrical and comprising: (b) a plunger comprising: (c) a unitary axially protruding needle retractor lock; said plunger being connected to said seal member fixedly seated on said plunger, with the seal having a substantially circular cross-sectional profile and an outer diameter substantially equal to an inner cross-sectional diameter of said hollow barrel, telescopingly received and slidingly contiguous with said inner surface of said hollow barrel; and, (d) a needle assembly comprising: a fluid passage communicating with the inner space in the hollow barrel; and an axial passage defined through the needle hub to receive an end of the needle, wherein rotating the plunger connectedly engages the needle assembly and hub with the needle retractor of the plunger, said needle retractor formed as a closed contour resilient element having at least one gap recess formed therein and formed axially on and protruding longitudinally from the top surface of the front head of said plunger, said closed contour resilient element being insertable into the locking chamber of hub, wherein upon a rotation of said closed contour resilient element said lug post member is received into said gap recess to capture said needle assembly by the needle retractor of said plunger, whereby said needle assembly may be axially moved into said hollow barrel.