Dosing unit for an ambulatory infusion device
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United States of America Patent
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May 30, 2017
Issued Date -
N/A
app pub date -
Feb 28, 2014
filing date -
Sep 2, 2011
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Abstract
At least one dosing unit for an infusion pump is disclosed having a piston pump with a pump cylinder, a plunger arranged within said cylinder, and a plunger driving part provided for transmitting rotational torque from a driving unit to the plunger without itself being linearly displaced. The cylinder, the plunger and the plunger coupling element are coaxially arranged along a longitudinal axis and rotatable around said axis in regard to static parts of the dosing unit. The plunger and cylinder each having threads which engage with each other in such a way that a rotational movement of the plunger around the longitudinal axis results in a linear displacement of the plunger along the longitudinal axis. The dosing unit also having first coupling parts associated with the cylinder and second coupling parts associated with the plunger.
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