Ambulatory infusion device
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United States of America Patent
Stats
-
Feb 21, 2023
Grant Date -
Sep 26, 2019
app pub date -
Jun 5, 2019
filing date -
Dec 14, 2016
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An ambulatory infusion device including a pump drive unit, a valve drive unit and a control unit. The pump drive unit includes a pump actuator and a pump driver coupled to a piston of a metering pump unit. The valve drive unit includes a valve actuator and a valve driver coupled to a valve unit for transmitting a valve switching force or torque. The control unit controls a repeated execution of: (a) placing the valve unit in a filling state; (b) displacing the piston in a retraction direction; (c) displacing the piston in an advancing direction by a backlash compensation distance; (d) switching the valve unit from the filling state into a draining state; and (e) further displacing the piston in the advancing direction in a number of incremental steps over an extended time period.
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Family
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