Drive device for the linear movement of an infusion syringe piston, infusion pump and method for replacing an infusion syringe
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United States of America Patent
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May 31, 2016
Grant Date -
Apr 2, 2015
app pub date -
Aug 7, 2012
filing date -
Nov 30, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The invention relates to a drive device for linear movement of an infusion syringe piston of an infusion syringe disposed on an infusion pump comprising a drive head unit including a main bearing means for supporting the infusion syringe piston, a fixing means for securing the infusion syringe piston to the main bearing unit as well as means for triggering the fixing means and comprising an advancing means for the drive head unit including a motor-drivable advancing spindle and a multi-part advancing spindle nut having at least one radially movable nut shell, wherein the drive head unit additionally comprises detecting means for detecting the infusion syringe piston ahead of the main bearing means, the detecting means including a multi-threshold sensor unit comprising an at least two-stage upstream detection means for detecting different positions of the infusion syringe piston ahead of the main bearing means.
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