Method for Ensuring Constant Speed of a Motor in an Injection Device
First Claim
1. 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:
- setting a first target speed to be reached by the piston rod,determining 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, orif the first target speed cannot been reached, setting a second target speed.
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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
11 Claims
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1. 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:
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setting a first target speed to be reached by the piston rod, determining 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, or if the first target speed cannot been reached, setting a second target speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11)
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10. An injection device for injecting a set dose of medicine from a medicine containing ampoule, 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 comprising a user interface a microprocessor, a memory module, a motor controller and at least one A/D converter for converting an incoming analogue signal to the control module into a digital format.
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Specification