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Medicament injector

  • US 3,923,059 A
  • Filed: 10/11/1973
  • Issued: 12/02/1975
  • Est. Priority Date: 07/01/1971
  • Status: Expired due to Term
First Claim
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1. A novel medicament injector device for the addition of concentrated medication to rubber stoppered solution containers comprising:

  • a cylindrical vial having an open end and a closed end, a resilient plug adapted to be inserted at least partially through said open end of said vial;

    said plug forming a sealing engagement with the walls of said vial with a press fit;

    a cylindrical member having one closed end, said cylindrical member holding a needle extending inwardly into said cylindrical member and having a sharpened inner end;

    said cylindrical member having a tip extending outwardly from said closed end, said tip surrounding and extending from the lower end of said needle portion said tip being an elongated member of generally uniform circular cross-section and having a central fluid passage extending substantially the length of the tip, said tip terminating in a pointed end in a zone of reduced cross-section, said zone having at least one fluid passage which communicates with said central fluid passage and forms an oblique angle with respect thereto;

    interlocking means on said cylindrical member and cooperating interlocking means on said plug, whereby upon interlocking of said plug with said cylindrical member said vial is first held in an assembled but non-operating position and upon further interlocking of said plug with said cylindrical member, said plug is adapted to be pierced by said needle and said needle communicated with said vial without the application of substantial axial pressure on said plug and said plug is locked securely to said cylindrical member to permit aspiration upon withdrawal of said vial or to permit expulsion of the contents of said vial into said solution container upon exertion of pressure on said vial, said pointed tip being adapted to pierce the stopper of said container without cutting loose pieces from the stopper and without the loss of any vacuum within said container.

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