Patent ID: 9125994
Filing Date: 2015-09-08
Classification: A61M,Y10T

Abstract:
1. A dose setting mechanism for a drug delivery device, said mechanism comprising: an outer housing; an inner housing having a helical groove along an external surface of said inner housing, said inner housing comprising a first rotational stop member near one end of said helical groove, wherein the first rotational stop member comprises a first flexible arm member; and a dial sleeve having internal and external surfaces where the internal surface is rotatably engaged with said helical groove of said inner housing and where the external surface does not contain a helical groove and comprises a generally smooth outer surface, wherein, when a user rotates said dial sleeve to select a dose, said first rotational stop member prevents said user from selecting a dose greater than a pre-defined maximum selectable dose, wherein the internal surface of the said dial sleeve comprises an inner surface having a helical groove and a second rotational stop member, wherein said first rotational stop member of said inner housing engages with said second rotational stop member of said dial sleeve when a user attempts to select a dose greater than said pre-defined maximum selectable dose, wherein said second rotational stop member comprises a second flexible arm member, and wherein the second flexible arm member rotates out and contacts an internal surface of the outer housing when a user attempts to select a dose greater than said pre-defined maximum selectable dose.