×

Dispenser for patient infusion device

  • US 6,656,159 B2
  • Filed: 04/23/2002
  • Issued: 12/02/2003
  • Est. Priority Date: 04/23/2002
  • Status: Expired due to Term
First Claim
Patent Images

1. A device for delivering fluid to a patient, comprising:

  • an exit port assembly;

    a reservoir including a side wall extending towards an outlet connected to the exit port assembly;

    a threaded lead screw received at least partly in the reservoir and extending towards the outlet;

    a plunger secured to the lead screw and having an outer periphery linearly slideable along the side wall of the reservoir, wherein the plunger and the lead screw are operatively arranged such that rotating the lead screw in a first direction causes the plunger to slide along the side wall towards the outlet of the reservoir;

    a dispenser including an elongated shape memory element having a changeable length decreasing from an uncharged length to a charged length when at least one charge is applied to the shape memory element, the shape memory element having a first end secured to the lead screw, a portion of the elongated shape memory element wrapped around the lead screw, and a second end fixed with respect to the lead screw, such that the changeable length of the shape memory element decreasing from an uncharged length to a charged length causes rotation of the lead screw in the first direction.

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