×

Dispensing fluid from an infusion pump system

  • US 8,585,657 B2
  • Filed: 06/21/2011
  • Issued: 11/19/2013
  • Est. Priority Date: 06/21/2011
  • Status: Active Grant
First Claim
Patent Images

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;

    an electrically powered actuator;

    a drive wheel that rotates in response to movement of the electrically powered actuator; and

    a piston rod that is engaged with the drive wheel, wherein the piston rod is advanced in a longitudinally forward direction relative to the drive wheel toward the space to receive the medicine in response to rotation of the drive wheel,wherein the drive wheel is spring-biased in an axial direction that is generally opposite to the longitudinally forward direction so that the drive wheel remains in a generally fixed axial position relative to the pump housing during forward advancement of the piston rod relative to the drive wheel.

View all claims
  • 8 Assignments
Timeline View
Assignment View
    ×
    ×