Patent ID: 7850662
Filing Date: 2010-12-14
Classification: A61M

Abstract:
1. A dose setting mechanism for a drug delivery device, said mechanism comprising: an outer body; an inner body having an external helical groove, said inner body operatively coupled to a driver and guiding said driver to dispense a dose set by said dose setting mechanism; and a dial sleeve disposed between said outer body and said inner body, said dial sleeve rotatably engaged with said external helical groove of said inner body, wherein when a dose is set by said dose setting mechanism, said dial sleeve is rotated with respect to both said outer body and said inner body and said dial sleeve is translated away from both said outer body and said inner body, further comprising a spindle operatively coupled to said driver such that, when said inner body guides said driver to dispense said dose set by said dose setting mechanism, said driver is configured to push said spindle to act on a cartridge bung while said spindle translates in a distal direction to expel said dose from said cartridge; and wherein said spindle comprises at least first and second helical grooves.