Patent attributes
A fluid flow rotary driven apparatus includes a support having an axis of rotation and a plurality of elongate, curved rotor wings attached to and extending outwardly from the support. Each wing is attached to the support at an inner end and projects outwardly in a direction transverse to the axis of rotation to a distal end. Each wing includes a convex surface defining a plurality of logarithmic spiral line segments interconnecting the inner and outer ends. Each spiral line segment extends completely within a respective plane transverse to the axis of rotation. The wings are responsive to a fluid flow across the outer surface of the wings for driving the support to turn about the axis of rotation. A rotary transmission device is operably connected to the support and responds to turning of the support for producing an energy output.
