Abstract: A disposable, single use syringe comprised of a hollow body, a retractable needle assembly positioned in the hollow body, and a plunger assembly in the hollow body. The plunger assembly includes an elongated frame portion including at least one guide track between its ends. A retraction member is releasably secured to one end of the frame and a catch member, including a catch element, is positioned with a guide configured to travel in the plunger frame guide track. An elastic member extends between the retraction member and the catch member. A retention assembly depends from the opposite end of the plunger frame and is configured to receive and secure the catch element and thereby tension the elastic member. The needle assembly and the retraction member have complimentary mating members, whereby the tension on the elastic member is released and the injection means is drawn into the hollow body after the needle assembly and the retraction member mate. A method of manufacture is also provided.

Abstract: A sharps disposal container cap securement arrangement includes a container with a neck having an opening at a top thereof through which sharps may be placed for disposal within the container, a cap adapted to screw downward over and around the neck of the container to close the opening and to provide a fluid-tight seal therewith once the cap is screwed down on the neck, an annular lock collar rotatably mounted around an exterior surface of the neck of the container, detents formed on the exterior surface of the neck of the container and on the collar for supporting the collar on the neck for movement between a lowered unlocked condition and a raised locked condition in response to the lock collar being rotated between first and second positions relative to the neck, and cooperative series of one-way teeth formed on the collar and on the cap for securing the cap to the collar and thereby preventing unscrewing of the cap from the neck of the container once the cap is screwed down on the neck providing the flui