Drive mechanisms suitable for use in drug delivery devices
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United States of America Patent
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-
Dec 6, 2011
Issued Date -
N/A
app pub date -
May 15, 2009
filing date -
Mar 3, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present disclosure is directed to a dose setting mechanism that may be used with a drug delivery device. The dose setting mechanism may include an inner body having a helical thread along an outer cylindrical surface of the inner body, and a drive sleeve for driving a piston rod in an axial direction, the drive sleeve positioned within at least a portion of the inner body. The dose setting mechanism may further include a dose dial sleeve rotatably engaged with the helical thread of the inner body and a dial grip connected to the dose dial sleeve and releasably connected to the drive sleeve. Further when a dose is set, the dial grip is rotated so that both the dose dial sleeve and the drive sleeve rotate with respect to the inner body.
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