| 摘要 |
The syringe is comprised of an external cylindrical body (1) and a suction and ejection piston (2) displaceable within said body, the piston including at its internal end the corresponding seal (3). According to the invention, said seal is held at the extremity of the piston by means of one or a plurality of arms (4) hinged at said end of the piston, said arm or arms traversing the side wall of the seal to retain the latter. The arms have a sharpened free end (6) and a cutting front edge (7), so that, during the advance movement of the piston during the ejection phase, the wall of the external cylindrical body is cut, no cut being done during the suction displacement. The syringe is disposable and not reusable after its first and single use. <IMAGE> |
