Method for ensuring constant speed of a motor in an injection device
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United States of America Patent
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Feb 26, 2013
Grant Date -
Oct 27, 2011
app pub date -
Jul 1, 2011
filing date -
Feb 21, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to a method for ensuring a constant target speed of a battery driven electrical motor, the battery driven electrical motor being adapted to move a piston rod in an injection device so as to inject a set dose of medicine from the injection device, the method comprising the steps of setting a first target speed to be reached by the motor, determining whether the first target speed can be reached, and, if the first target speed can be reached, maintaining the first target speed until a set dose of medicine has been injected from the injection device, or if the first target speed cannot been reached, setting a second target speed.
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