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Potentiometer-controlled fluid ejection device

  • US 5,893,843 A
  • Filed: 02/14/1997
  • Issued: 04/13/1999
  • Est. Priority Date: 02/14/1996
  • Status: Expired due to Fees
First Claim
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1. An infusion device for delivering fluid from a flexible plastic container, the infusion device comprising:

  • a receptacle for the flexible plastic container;

    a fixed, clear and transparent front plate, bent at its sides to contact one side of the container;

    a movable plate to contact and press the other side of the container, the movable plate having a high friction rubber-type coating to keep the container in place, the movable plate positioned in an essentially parallel alignment with the fixed, clear and transparent front plate bent at its sides, to squeeze the container from its middle surface area;

    an electromechanical driving set to advance and retract the movable plate; and

    an electronic control set comprising a precision potentiometer linked to an electronic circuitry and software and to a liquid crystal display, to control a motor-driven shaft rotation speed.

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