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Artificial heart driving apparatus

  • US 4,583,525 A
  • Filed: 06/26/1985
  • Issued: 04/22/1986
  • Est. Priority Date: 03/30/1982
  • Status: Expired due to Term
First Claim
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1. An artificial heart driving apparatus comprising:

  • a first system including therein;

    a first solenoid valve having its input port connected to an output port of a positive pressure source;

    a first accumulator having an inner space connected to an output port of said first solenoid valve;

    a second solenoid valve having its input port connected to an output port of said first accumulator;

    a first pressure detecting means for detecting pressure in a fluid path from the output port of said first solenoid valve to the input port of said second solenoid valve;

    a third solenoid valve having its input port connected to an output port of a negative pressure source;

    a second accumulator having an inner space connected to an output port of said third solenoid valve;

    a fourth solenoid valve having its input port connected to an output port of said second accumulator;

    a second pressure detecting means for detecting pressure in a fluid path from the output port of said third solenoid valve to the input port of said fourth solenoid valve; and

    an opening and closing valve means having its output port connected to an artificial heart and its input port connected to both the output port of said second solenoid valve and the output port of said fourth solenoid valve;

    a second system including therein;

    a first solenoid valve having its input port connected to an output port of a positive pressure source;

    a first accumulator having an inner space connected to an output port of said first solenoid valve;

    a second solenoid valve having its input port connected to an output port of said first accumulator;

    a first pressure detecting means for detecting pressure in a fluid path from the output port of first solenoid valve to the input port of said second solenoid valve;

    a third solenoid valve having its input port connected to an output port of a negative pressure source;

    a second accumulator having an inner space connected to an output port of said third solenoid valve;

    a fourth solenoid valve having its input port connected to an output port of said second accumulator;

    a second pressure detecting means for detecting pressure in a fluid path from the output port of said third solenoid valve to the input port of said fourth solenoid valve; and

    an opening and closing valve means having its output port connected to an artificial heart and its input port connected to both the output port of said second solenoid valve and the output port of said fourth solenoid valve;

    a control board;

    a change over instructing switch means; and

    a control unit which controls opening and closing of said first solenoid valve in said first system based on both the pressure detected by said first pressure detecting means in said first system and a first set value preset in accordance with an instruction from said control board, controls opening and closing of said third solenoid valve in said first system based on both the pressure detected by said second pressure detecting means in said first system and a second set value present in accordance with an instruction from said control board, and controls opening and closing of said second solenoid valve and said fourth solenoid valve in said first system at predetermined time intervals, respectively;

    which upon change over instructions from said change over instructing switch means, controls opening and closing of said first solenoid valve in said second system based on both the pressure detected by said first pressure detecting means in said second system and a first set value preset in accordance with an instruction from said control board, controls opening and closing of said third solenoid valve in said solenoid valve in said second system based on both the pressure detected by said second pressure detecting means in said second system and a second set value preset in accordance with an instruction from said control board and controls opening and closing of said second solenoid valve and said fourth solenoid valve in said second system at the substantially same time intervals as those for said second solenoid valve and said fourth solenoid valve in said first system, respectively.

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