| 摘要 |
A non-deformable disposable hypodermic syringe, wherein after the use the needle, 3, can be fully retracted into the barrel, 4, to prevent accidental stabbing and risk of infection. Comprises a hub, 1, embodying a needle holder tube, 2, provided with internal barbs, 2b, which (after use) engage a domed head 7, of a plunger, 5. During use (suction and injection delivery) the said plunger domed head, 7 is retained behind a membrane, 9m, and within the piston, 9, by a similar internal barb, 9b, inside the piston, 9. <IMAGE> |
