| 摘要 |
PROTECTIVE DEVICE AND SYRINGE A protective device for a re-useable syringe comprising a tubular sheath mounted on the syringe barrel for reciprocal movement therein between an extended position wherein it covers the hypodermic needle connected to the syringe and a retracted position wherein the needle connecting end of the syringe barrel is exposed to enable connecting a new sterile hypodermic needle thereto. The tubular sheath has a plurality of longitudinal grooves to receive corresponding longitudinal ribs of the barrel therein to provide enhanced stability of the tubular sheath to hold it more securely in axial alignment with the syringe barrel when in the extended position to thereby prevent the wall of the tubular sheath from being moved out of axial alignment where it could come in contact with the needle which it encompasses. The tubular sheath has access openings near its rearward end which overlie the hub of the hypodermic needle when the sheath is in its extended position, thereby enabling the user to reach in and unscrew the hub of the needle assembly from the syringe barrel after the needle has been used. The disconnected needle can then be carried in the cavity of the tubular sheath while held in the horizontal position to a disposal container and dropped therein by tipping the syringe and tubular sheath downward. The used needle can then slide out the open end of the sheath into the disposal container.
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