Rosenberg, Klein & Lee
Multifunctional syringe with safety slide sleeve
 A multifunctional syringe with safety slide sleeve, including: a connecting tube, a top end of the connecting tube being formed with a needle connecting section for connecting with an injection needle, a bottom end of the connecting tube being connected with an infusion tube, an outer circumference of the connecting tube being formed with a latching groove near the top end thereof, at least one guiding rib being formed on the connecting tube and axially downward extending from a lower side of the latching groove, the guiding rib being downward tapered; and a safety slide sleeve slidably fitted around the infusion tube or the connecting tube, a bottom end of a fitting hole of the slide sleeve being formed with an inward extending latching flange. When the slide sleeve is slided upward, the latching flange is guided by the guiding rib to be smoothly latched in the latching groove of the connecting tube. Accordingly, the injection needle can be totally received and hidden in the slide sleeve so as to avoid impalement or infection of other people with AIDS, hepatitis, etc. 
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Wen-Neng
Liu