Patent ID: 9289552
Filing Date: 2016-03-22
CPC Classification: A61M

Claim Text:
1. A drive device of an infusion syringe piston drive head for moving an infusion syringe piston comprising: an advancing means including an advancing slide, an advancing spindle and a multi-part advancing spindle nut including at least one radially movable nut shell; and a blocking means adapted to be automatically triggered by a control sensor and configured to block an infeed motion of the drive head in which the advancing slide can be driven on the advancing spindle by the advancing spindle nut and in which the drive head is arranged on the advancing slide, wherein the blocking means adapted to be automatically triggered by the control sensor comprises the multi-part advancing spindle nut configured to block the infeed motion of the drive head on the advancing spindle and an axially displaceable trigger sleeve that at least partially surrounds a radial outside of the advancing spindle nut.