Injection device comprising a locking nut
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United States of America Patent
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Jan 15, 2013
Grant Date -
May 6, 2010
app pub date -
Mar 14, 2008
filing date -
Mar 23, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to an injection device for injecting a dose of drug. The injection device comprises a housing, a dose setting mechanism being operable to set a desired dose, an injection mechanism comprising a piston rod (7) adapted to cooperate with a piston positioned in a cartridge containing a drug to be delivered in order to cause a set dose to be delivered from the cartridge via the injection device, a dosage tube (6), and retaining means arranged to prevent axial movement of the dosage tube in a distal direction relatively to the housing during dose setting. The dose setting mechanism comprises a rotatable dose knob (24), operation of the dose setting mechanism causing energy to be stored in a spring member. The injection mechanism is driven by releasing energy previously stored in the spring member during dose setting.
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