Storage, mixing and filtering receptacle for syringe

Claim 1

An add-on device for storing, mixing and filtering a fluid and concentrated component, said add-on device including: (a) a syringe having a rigid outer barrel; (b) a hollow needle secured to a distal end of said outer barrel and providing a communication pathway from the exterior to the interior of said syringe barrel; (c) a tubular sheath having two ends with a first end of said sheath mountable in a fluid-tight manner on the outer surface of the distal end of said barrel or an interior sheath member removably attached to said end, said tubular sheath having an extending portion in and on which the secured end is formed; (d) means for closing the second end of the sheath and inhibiting the passage of any air and the like into the sheath after mounting said sheath on the barrel and closing of the second end; (e) a rigid inner ampule or capsule with a thin wall susceptible for breaking and in a stored condition encapsulating a concentrate, after which it is sealed to prevent loss of contents; (f) a rigid outer ampule or capsule with a thin wall adapted for breaking and in a stored condition having fluid and said inner sealed ampule therein and then said outer ampule is sealed to prevent loss of stored contents, and (g) filter means interposed between the distal end of the hollow needle and the sealed rigid outer ampule, said filter means mounted in the sheath so that any and all released and mixed fluids must and do pass through the filter means by negative pressure developed through aspiration of the syringe whereby that sheath portion near the closure end and adjacent the rigid outer and inner ampules is sufficiently flexible and thick so that manipulation by an operator of said flexible portion may be made to break said ampules, shake the now exposed contents and draw this mixture through the filter means and into the syringe after which the add-on device is removed from the syringe barrel and discarded.