Patent ID: 8257319

Claim:
A dose setting mechanism for a drug delivery device, said mechanism comprising: a driver; an outer housing; an inner housing comprising an external surface having an external groove and an internal surface having an internal helical spline, said housing configured to guide said driver to dispense a dose set by said dose setting mechanism; a dial sleeve disposed between said outer housing and said inner housing, said dial sleeve rotatably engaged with said external groove of said inner housing; such that when a dose is set by said dose setting mechanism, said dial sleeve is rotated with respect to both said outer housing and said inner housing and said dial sleeve is translated away from both said outer housing and said inner housing; a dose limiter, said dose limiter splined to said helical spline of said inner housing; and wherein said dose limiter comprises an internal helical groove that is operatively coupled to a helical groove provided on said driver.