Patent ID: 8344535

Claim:
An electricity-generating platform having a buoyancy, comprising: (A) a frame; (B) at least two fluid turbines, each fluid turbine coupled to the frame and adapted to rotate about an axis when placed in a stream of flowing water, said fluid turbines collectively providing a substantial majority of the buoyancy for the platform, wherein (i) a first of the at least two fluid turbines is adapted to rotate in a first direction around its axis of rotation, and (ii) a second of the at least two fluid turbines is adapted to rotate in a second direction around its axis of rotation, said second direction being opposite the first direction; and (C) at least one electric generator coupled to at least one of the at least two fluid turbines and adapted to generate electricity in response to rotation of the at least one of the at least two fluid turbines; and wherein the at least two fluid turbines each has a generally prolate shape from at least a midpoint to a front.