×

Dispensing fluid from an infusion pump system

  • US 7,938,803 B2
  • Filed: 04/13/2009
  • Issued: 05/10/2011
  • Est. Priority Date: 09/26/2005
  • Status: Active Grant
First Claim
Patent Images

1. A medical infusion pump system, comprising:

  • a pump device having a drive system to cause dispensation of a medicine, the drive system including;

    a pawl that is adjustable relative to a ratchet body, the pawl engaging one or more teeth of the ratchet body to incrementally advance the ratchet body;

    a string member coupled to the pawl, the string member being arranged in a loop around two or more guide structures; and

    a rotational motor coupled to the string member so that rotation by the motor causes the string member to adjust the pawl relative to the ratchet body, wherein the string member is twisted by one or more rotations of the rotational motor and thereby urges the pawl to adjust relative to the ratchet body.

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