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Disposable double vial syringe

  • US 4,180,070 A
  • Filed: 08/29/1977
  • Issued: 12/25/1979
  • Est. Priority Date: 08/29/1977
  • Status: Expired due to Term
First Claim
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1. A prefilled, readily activated syringe comprising:

  • a first holding means defining a syringe barrel with an open end and a central passageway;

    a first small volume container having a medicament or diluent therefor constructed and arranged to be engaged by said holding means in a sliding relationship;

    a pierceable stopper in sealing and slidable engagement with said first container;

    a double-pointed piercing cannula member having a hub portion disposed in said central passageway;

    means operatively associated with said hub and said central passageway defining at least two frictional stop positions for said cannula hub;

    an adapter housing constructed and arranged for movable engagement over said syringe barrel;

    a first contact surface operatively associated with said cannula hub;

    a second surface operatively associated with said adapter housing for engagement with said first contact surface;

    a second holding means for a second small volume container extending from said adapter housing and having a passage therethrough for said cannula;

    a second small volume container having a differing medicament or diluent from that in said first container, said container constructed and arranged to be engaged by said second holding means in a sliding relationship; and

    a pierceable stopper in sealing and sliding engagement with said second container;

    said first and second holding means constructed and arranged with respect to said containers to position said container stoppers out of contact with the piercing points of said cannula in one position and to afford piercing of both stoppers when said adapter housing is moved in a direction toward said first container so that said second container vial is pierced first and upon further movement of said adapter housing said first and second contact surfaces will engage to effect movement of said cannula hub with respect to said central passageway of said syringe barrel by means of said frictional stop positions to effect a piercing of said stopper in said first container whereby fluid communication is established between said containers to effect mixing of said medicament and said diluent with expulsion of said mixture from said syringe after removal of said adapter and said second container.

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