Patent ID: 9352097
Filing Date: 2016-05-31
CPC Classification: A61M,Y10T

Claim Text:
1. A dose setting mechanism for use with a drug delivery device comprising a housing, a clutch, a number sleeve, an inner housing, a spindle for driving a bung of a cartridge and further comprising a driver for driving said spindle, which extends about the spindle, with said driver comprising a helical groove form that engages a first helical groove of said spindle, said spindle comprising: a generally circular shaft having an outer surface, said generally circular shaft extending from a distal end to a proximal end of said circular shaft; a first helical groove provided along a first portion of said outer surface of said generally circular shaft, said first helical groove having a first pitch; and a second helical groove provided along a second portion of said outer surface of said generally circular shaft, said second helical groove overlapping said first helical groove, said second helical groove having a second pitch; wherein the number sleeve is in rotatable engagement with respect to said housing; wherein the driver is releasably coupled to said number sleeve with the clutch disposed about the driver between the driver and the number sleeve; and wherein the spindle is operatively coupled to said driver, such that when a user sets a dose by rotating said number sleeve, said driver also rotates, wherein the inner housing fits between the clutch and the number sleeve.