| 摘要 |
A SYRINGE COMPRISES A BARREL (1) HAVING A PLUNGER (7) IN SLIDABLE AND SEALING ENGAGEMENT THEREWITH. IN OTHER TO PROVIDE AN AUTODESTRUCT SYSTEM, SO THAT THE SYRINGE CAN BE USED ONCE ONLY, BEING RENDERED DISABLED AFTER ONE NORMAL USE, THE BARREL (1) HAS MEANS INTERRUPTING THE CYLINDRICAL SURFACE OF ITS INNER WALL IN THE FORM OF GROOVES (10, 11) OR A PROJECTION (29), AND THE PLUNGER (7) HAS A LOCKING MEANS (17, 20) WHICH OPERATES ON ENGAGEMENT WITH A GROOVE (10, 11) OR PROJECTION (29) ON WITHDRAWAL OF THE PLUNGER (7) TO PREVENT FURTHER WITHDRAWAL MOVEMENT. THE LOCKING MEANS (17, 20) IS PROVIDED ON THE HEAD OF THE PLUNGER (7) ADJACENT AN ELASTOMERIC SEALING CAP (15). THE LOCKING MEANS MAY COMPRISE A PAIR OF FLUKES (17) OR A CROSS-SHAPED DISC (20).(FIG. 14) |
