Abstract: A closure for a container having an open top surrounded by a container wall. The closure includes a top wall from which a hollow insert depends for reception within the opening of the container and further includes an outer skirt that depends from the top wall for releasably engaging an outer face of the container wall. The insert has a first seal and a second seal for sealingly engaging the inner face of the container wall. The second seal is formed upwardly of the first seal, and a channel is formed between the seals to prevent leakage through capillary action.

Abstract: A syringe unit arranged for a single-use only. The syringe unit comprises a barrel substantially closed at one end by a nozzle and open at the other end. A plunger having a piston is received in the barrel and is movable therealong. A fluid chamber is defined within the barrel between the piston and the nozzle. A syringe needle is releasably secured to the barrel with the cannula extending outwardly from the barrel and communicating with the fluid chamber and is releasable upon rotation relative to the barrel. An engaging means is provided for releasably engaging the piston with the needle whereby when so engaged the piston can be rotated to effect release of the needle from the barrel and then retracted to move the needle into a protective position within the barrel. The engaging means comprises a socket defined in a cavity provided in the needle, and a projection provided on the piston for reception in the socket and engagement therewith.

Abstract: A sheath for the needle of a hypodermic syringe to isolate the needle so as to avoid contamination and injury, particularly after use of the needle. The sheath comprises a hollow body having an opening at one end and is movable relative to the syringe needle between a first position in which the syringe needle is wholly contained within the hollow body and a second position in which the syringe needle extends through the opening in the hollow body.

Abstract: Several embodiments of disposable syringes having a barrel, a plunger and needle wherein the plunger is adapted to withdraw the needle and be permanently deformed so as to render the syringe incapable of a second use after an injection has been made.