| 摘要 |
A retractable syringe, comprising a needle having a tip and a base, a needle collar coupled to the needle, the needle collar including at least one groove disposed in a bottom portion of the needle collar and extending from the portion of the needle collar nearest to the base of the needle toward the tip of the needle, a fitting coupled to the needle collar and including a sealing element disposed between a first portion of the fitting and the needle collar, a barrel unit, the barrel unit designed for coupling to the fitting, a plunger unit having a piston on a first end of the plunger unit, the plunger unit and piston being positioned in the barrel unit, an extractor element coupled to the first end of the plunger and having a proximal end adjacent to the plunger and a distal end, the extractor element designed for coupling to the needle collar and encompassing at least a portion of the at least one groove. |
| 主权项 |
1. A retractable syringe, comprising:
a needle having a tip and a base; a needle collar coupled to the needle, the needle collar including at least one groove disposed in a bottom portion of the needle collar and extending from the portion of the needle collar nearest to the base of the needle toward the tip of the needle; a fitting coupled to the needle collar and including a sealing element disposed between a first portion of the fitting and the needle collar; a barrel unit, the barrel unit designed for coupling to the fitting; a plunger unit having a piston on a first end of the plunger unit, the plunger unit and piston being positioned in the barrel unit; an extractor element coupled to the first end of the plunger unit and having a proximal end adjacent to the plunger unit and a distal end, the extractor element designed for coupling to the needle collar and encompassing at least a portion of the at least one groove. |
