Dispensing fluid from an infusion pump system
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;
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 while the piston rod is advanced and that couples with the ratchet mechanism to provide a reset force to the ratchet mechanism.
14 Assignments
0 Petitions
Accused Products
Abstract
Some embodiments of a medical infusion pump system include a drive system that advances a piston rod to dispense medicine to the patient in a safe and energy efficient manner.
-
Citations
34 Claims
-
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 while the piston rod is advanced and that couples with the ratchet mechanism to provide a reset force to the ratchet mechanism. - View Dependent Claims (2, 5, 6, 7, 8, 9, 10, 11, 12, 13, 25, 26, 27, 28, 29, 30, 33)
-
-
3. 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, wherein the drive system further comprises a spring device that provides a drive force to the ratchet mechanism during the drive step to advance the ratchet mechanism in a forward direction, and wherein the electrically powered actuator is coupled to the ratchet mechanism during a reset cycle to provide a reset force to the ratchet mechanism. - View Dependent Claims (4, 31, 32, 34)
-
-
14. 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 drive wheel that rotates to advance a piston rod toward the medicine to dispense the medicine when the medicine is received in the space; a ratchet wheel that is incrementally rotated in a forward direction to rotate the drive wheel and thereby advance the piston rod; a movable pawl that engages the ratchet wheel, the movable pawl being adjustable from a reset position to a forward position so as to incrementally rotate the ratchet wheel in the forward direction a spring device that urges the movable pawl to adjust from the reset position to the forward position; and an actuator assembly that acts upon the movable pawl to force the movable pawl to the reset position and that reverses to separate from the movable pawl when the spring device adjusts the movable pawl from the reset position to the forward position. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
-
Specification