Drive mechanisms suitable for use in drug delivery devices
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United States of America Patent
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Apr 5, 2011
Grant Date -
Jan 6, 2005
app pub date -
Apr 8, 2004
filing date -
Apr 10, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A drive mechanism for use in a drug delivery device comprising an epicyclic gearbox. This drive mechanism includes a housing having a helical thread; a piston rod having a non-circular cross section and an external helical thread; a dose dial sleeve, which is threadedly engaged with the housing and being rotatable with respect to the housing; and a drive sleeve, located between the housing and the piston rod, which is threadedly engaged with the piston rod.
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