THORLEY, CRAIG STEPHEN,KAAL, JOSEPH HERMES,JOHNSON, IAN,READE, ANDREW,SIU, ERIC,SOKOLOV, RICHARD,DUNN, CHRISTOPHER
申请号：
NZ60045510
公开号：
NZ600455A
申请日:
2010.11.11
申请国别(地区):
NZ
年份:
2013
代理人:
摘要：
600455 A replaceable needle assembly is provided for a retractable syringe (10) comprising a barrel (11) and a plunger (20), whereby the retractable needle (30) can be replaced by a user without affecting the retraction mechanism. A mounting member (40) is removably mountable to the barrel (11) by way of a screw-thread connection and a needle mount is removably coupled to the mounting member (40). A needle (30) is mounted to the needle mount (34). The barrel (11) comprises a needle mount retainer (60) that comprises a plurality of fingers that engage the retractable needle mount (34) to prevent inadvertent retraction. The plunger (20) comprises a collapsible seal (80) which maximizes the efficiency of fluid delivery prior to the plunger (20) engaging the retractable needle mount (34) for retraction. An initially compressed spring decompresses to drive retraction of the plunger (20) and the engaged needle mount (34). A lock formed between the plunger (20) and barrel (11) prevents further use of the plunger after retraction.
