| 主权项 |
1. A powder inhaler comprising: a body that is provided with a dispenser orifice; at least one reservoir containing a dose of powder for dispensing; reservoir-opening means for opening a reservoir on each actuation; and a dispersion chamber including an outlet that is connected to said dispenser orifice, and an inlet that is connected to said opening means and that receives the dose of powder from said open reservoir, said dispersion chamber containing at least one movable element; wherein said dispersion chamber includes a ball path that defines displacement of said at least one moveable element;
wherein the ball path comprises a bottom surface that is substantially planar, an outer edge that is substantially circular, and an inner edge that is substantially circular and that is formed by a central profile, a central axis of said outer edge being offset from the central axis of said inner edge, wherein a width of said substantially plane bottom surface of the ball path narrows in a direction of movement of the ball along the ball path away from the air inlet. |
