Patent ID: 8237304
Filing Date: 2012-08-07
Classification: B63B,F03B,F05B,Y02E

Abstract:
1. An underwater power-generating device comprising: a pair of electric generators each of which includes a turbine with a rotor and is housed in a fluid-tight nacelle, wherein the fluid-tight nacelles are connected together by a hydrofoil and provide buoyancy; wherein each of the fluid-tight nacelles is connected by a pair of device tethers to a buoyancy providing strut being moveable to control depth of the device; wherein a pair of control tethers is connected to the buoyancy providing strut and joins into a left side tether, a pair of control tethers is connected to the buoyancy providing strut and joins into a right side tether, and a pair of control tethers is connected to the buoyancy providing strut and joins into a main tether; wherein the main tether, the left side tether and the right side tether anchor said buoyancy providing strut, at least one of said tethers being a variable length tether; and wherein a length control is connected to said variable length tether.