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Dispensing Fluid from an Infusion Pump System

  • US 20070179444A1
  • Filed: 02/22/2007
  • Published: 08/02/2007
  • Est. Priority Date: 09/26/2005
  • Status: Active Grant
First Claim
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1. An infusion pump device, comprising:

  • a pump housing that defines a space to receive a medicine;

    a drive system to dispense a medicine from the pump housing when the medicine is received in the space, the drive system comprising;

    a ratchet mechanism that advances a piston rod during a drive step to dispense the medicine when the medicine is received in the space; and

    an electrically powered actuator that decouples from the ratchet mechanism during the drive step.

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