Abstract: An automatically retractable hypodermic needle incorporating a spring loaded needle assembly held in place by a rotatable member having a dislodgable filler sleeve extending through a hole in the rotatable member, such that upon the application of downward pressure by the plunger on the edge of the rotatable member, the member is rotated and the dislodgable filler sleeve is aligned with the spring loaded needle assembly, allowing the needle assembly to force the filler sleeve out of the hole in the rotatable member, and accordingly, allow the filler sleeve and needle assembly to be automatically retracted into the barrel of the plunger.

Abstract: A hypodermic syringe having a cylindrical outer body adapted to accept a smaller fluid storage vial within the inner walls thereof and having a removable cap on one end of said cylinder for providing access to insert and remove the vial with a spring loaded double headed needle assembly integrated into the other end thereof and held in place by a retainer until the storage has been punctured by one and of the needle, the vial filled and removed and the needle assembly retracted into the space vacated by the vial.