B. Braun Melsungen Ag

Rene Wildner

Rolf Heitmeier

Hans-Josef Gerlach

Berthold Wolfram

Rolf Heitmeiter

Wolfram Berthold

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.

Drive device for the linear movement of an infusion syringe piston, infusion pump and method for replacing an infusion syringe

The syringe pump comprises a receiving position for a syringe. The piston plate of the syringe is moved by a drive head which is fastened to a drive rod. For locking the piston rod prior to fixing the piston plate in the drive head, a braking element is provided on a syringe holding head. The syringe holding head further serves for determining the respective syringe size. After placing the syringe holding head against a syringe cylinder, the brake element is actuated to temporarily engage the piston rod and fix it relatively to the syringe cylinder.

Method for making a syringe pump having a piston brake

Syringe pump having a piston brake

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Melsungen, Germany

Rene Wildner