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Infusion pump

  • US 4,666,430 A
  • Filed: 12/05/1984
  • Issued: 05/19/1987
  • Est. Priority Date: 12/05/1984
  • Status: Expired due to Term
First Claim
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1. An intravascular infusion pump comprising:

  • a source of pressurized gas;

    a pressure regulator coupled to said gas source for providing gas at a lower pressure than that of the gas from said gas source;

    a syringe having a barrel with an open end and a syringe tip at another end, said syringe barrel containing a fluid solution and having a slidable member which pushes the fluid solution out of the syringe through the tip when pressure is applied to the slidable member;

    means for directing said pressurized gas from said pressure regulator to the open end of said syringe so that said gas exerts pressure directly on said slidable member to force fluid out through the tip of said syringe; and

    a valve coupled to the tip of said syringe, said valve including;

    a housing having a passageway for fluid flow;

    a sealing member slidably mounted within said passageway;

    spring means for pushing said sealing member within said passageway to close off fluid flow through said valve;

    means for moving said sealing member against the action of said springs means to open fluid flow through said valve; and

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