Importance

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Abstract

A syringe in which one or more injectable materials are filled, comprises a cylinder or barrel in which a front partition stopper, which can be fixed or movable depending on the embodiment, and one or more intermediate partition stoppers are slidably disposed. In the simplest arrangement, a single intermediate partition stopper is disposed between the front partition stopper and a rear piston, to define first and second chambers within the cylinder in which first and second injectable materials can be respectively filled. An outer periphery of the intermediate partition stopper is provided with a plurality of circular lips between which at least one peripheral groove is defined. One of the first and second chambers is communicated with peripheral groove or grooves of the intermediate partition stopper by small passages to allow the first medicine, which is in liquid form, to enter and fill the groove or grooves and exclude air and bacteria therefrom. A transfer passage or passages are arranged in the wall of the cylinder to allow the first and second medicines to mix as the partition stopper is moved forward in response to the rear piston being forced into the cylinder.

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First Claim