| 摘要 |
<p>Syringe usable on one single occasion with locking in position of the piston after a first use. The syringe consists of a body (1) equipped with a center-piece (3), provided with a piston locking device (5) having two ratchets pointing in opposite directions. When the user has filled the syringe by suction using the piston (5), he exerts a pressure in order to start ejection of the liquid. The separating ring (4) is entrained, thereby releasing the locking device. It is then impossible to refill the syringe. The syringe according to the invention is particularly useful for preventing the propagation of certain diseases by the use of contaminated syringes.</p> |
