Dispensing fluid from an infusion pump system
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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Abstract
Some embodiments of a medical infusion pump system include a pump device having a cap device that mates with a pump housing to retain a medicine cartridge therein. In addition to retaining the medicine cartridge in the pump housing, the cap device may perform a number of preparatory functions or safety functions. In addition or in the alternative, some embodiments of the pump device may include a drive system that advances a piston rod to dispense medicine to the patient in a safe and energy efficient manner.
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Citations
17 Claims
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1. An infusion pump device, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification