| 摘要 |
PCT No. PCT/GB97/01232 Sec. 371 Date Nov. 4, 1998 Sec. 102(e) Date Nov. 4, 1998 PCT Filed May 6, 1997 PCT Pub. No. WO97/41908 PCT Pub. Date Nov. 13, 1997The invention concerns a safety syringe in which the needle may be held within a sheath both before and particulary after use without handling. The syringe consists essentially of a generally tubular protective sheath carrying piston engaging formations and having a needle end and an opposite rear end; a piston including an elongate piston body and a piston head, there being a fluid pathway through the head and longitudinally through the body, the piston body being operatively locatable to extend within the sheath and be engaged by the piston engaging formations, with the piston head outside the sheath and connected to and in fluid communication with the piston body; a barrel which is slidable in a discharge stroke in use over the outside of the operatively located piston head and along the sheath to a discharged position, to thereby release the piston engaging formations and grip the released piston, the barrel being oppositely slidable from the discharged position to withdraw the released piston substantially from the sheath to a safe locked position relative to the sheath, characterised in that the barrel is shaped and dimensioned to be slidable over the outside of the protective sheath and the piston body and sheath carry clips and stops to operatively lock the piston body relative to the sheath to hold a needle used with the syringe inside the sheath before and after use.
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