Method for ensuring constant speed of a motor in an injection device
First Claim
1. A system for ensuring a constant target speed of a battery driven electrical motor, the system comprisingan electrical motor operatively coupled to a direction sensitive encoded unit, anda control module, wherein the control module sets a first target speed to be reached by the piston rod prior to beginning an injection, and,determines whether the first target speed can be reached, andif the first target speed can be reached, maintaining the first target speed until the set dose of medicine has been injected from the injection device, andif the first target speed cannot been reached, setting a second target speed,determining whether the second target speed can be reached, and,if the second target speed can be reached, maintaining the second target speed until the set dose of medicine has been injected from the injection device.
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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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Citations
4 Claims
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1. A system for ensuring a constant target speed of a battery driven electrical motor, the system comprising
an electrical motor operatively coupled to a direction sensitive encoded unit, and a control module, wherein the control module sets a first target speed to be reached by the piston rod prior to beginning an injection, and, determines whether the first target speed can be reached, and if the first target speed can be reached, maintaining the first target speed until the set dose of medicine has been injected from the injection device, and if the first target speed cannot been reached, setting a second target speed, determining whether the second target speed can be reached, and, if the second target speed can be reached, maintaining the second target speed until the set dose of medicine has been injected from the injection device.
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4. An injection device for injecting a set dose of medicine from a ampoule containing medicine, the injection device comprising a system comprising:
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an electrical motor operatively coupled to a direction sensitive encoded unit, and a control module, wherein the control module sets a first target speed to be reached by the piston rod prior to beginning an injection, and, determines whether the first target speed can be reached, and if the first target speed can be reached, maintaining the first target speed until the set dose of medicine has been injected from the injection device, and if the first target speed cannot been reached, setting a second target speed, determining whether the second target speed can be reached, and, if the second target speed can be reached, maintaining the second target speed until the set dose of medicine has been injected from the injection device, and if the second target speed cannot be reached, setting a third target speed.
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Specification