Dosing unit, ambulatory infusion device comprising dosing unit and method for operating a dosing unit
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United States of America Patent
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Sep 1, 2015
Grant Date -
Jun 27, 2013
app pub date -
Mar 7, 2013
filing date -
Sep 12, 2008
priority date (Note) -
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Abstract
A dosing unit for an ambulatory infusion device and a method of operation are disclosed. The dosing unit includes a stationary member, a movable member, and a plunger. The movable member and the stationary member, together, make a charging valve and a discharging valve. The plunger is located, at least in part, in a metering cavity of the movable member and the movable member is adapted to selectively couple and decouple a driving unit, such that, by operating the driving unit with the movable member being coupled with the driving unit, the movable member moves with the plunger to maintain a position of the plunger relative to the movable member along a displacement axis, and by operating the driving unit with the movable member being decoupled from the driving unit, the plunger is displaced while the position of the movable member is maintained.
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