System and method for increased flow uniformity
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United States of America Patent
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-
May 28, 2002
Grant Date -
Jul 12, 2001
app pub date -
Feb 26, 2001
filing date -
Aug 3, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A system for increasing the volumetric flow uniformity of fluid pumped through a conduit by an infusion pump. A pumping mechanism operates in identifiable step movements that are broken down into microstep movements that are then grouped into packets. The pumping mechanism controls the period of each microstep, so that the sum of the microstep periods in a packet is essentially equal to the packet period, with little or no waiting time on the motor. The motor preferably begins moving the assigned microsteps in each packet immediately upon the beginning of the time period, but controls the period of the microsteps for that packet.
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