| 摘要 |
PCT No. PCT/GB93/01004 Sec. 371 Date Dec. 13, 1994 Sec. 102(e) Date Dec. 13, 1994 PCT Filed May 17, 1993 PCT Pub. No. WO93/23098 PCT Pub. Date Nov. 25, 1993.A syringe device for cartridged drugs has automatic needle retraction after cartridge contents expression. A drug cartridge is at least partially accommodated within a hollow piston actuator or carrier and is released for further retraction under bias thereinto by way of a piston rod. The piston rod serves to operate a piston contained in the drug cartridge and has deflectable locking arms that extend sideways into latching engagement with a holding formation of the piston actuator. Release of the arms by engagement with the open rear end of the cartridge permits retraction of needle and cartridge. Automatic needle insertion and cartridge contends discharge is also foreseen. |
