Damian Alexander Holland,Clive Nicholls,Dale Marc Comley,Lee Thomas Smith,Joseph David Cowan
申请号：
GB201600992
公开号：
GB2546502A
申请日:
2016.01.19
申请国别(地区):
GB
年份:
2017
代理人:
摘要：
An apparatus for use with a syringe to provide a safety syringe (and a kit of parts therefore) comprises a sheath 100 deployable for at least partially covering a needle 126 of the syringe, a sheath actuator 102 (e.g. a plunger and handle) for deploying the sheath and a ratioed mechanism 104 (e.g. a rack 118/120 and toothed pinion 110) linking the sheath and the sheath actuator； configured such that a magnitude of movement of the sheath is greater than a magnitude of movement of the sheath actuator during deployment of the sheath. In one embodiment the ratioed mechanism can comprise at least one helical guide (322, 324, Fig 3), e.g. a helical channel, which is rotated by the actuator and engages with a corresponding feature of the sheath (300, Fig 3), e.g. a lug and/or protrusion. In another embodiment the ratioed mechanism is provided by a pair of lever arms coupled to the sheath (552a, 552b, Fig 5).
