Abstract: Speed adjuster devices, systems, and methods are provided. In an embodiment of the present invention, a speed adjustor device comprises an input shaft, an output shaft, and a housing. The input shaft can receive a first rotational velocity input in a first direction. The housing can receive a second rotational velocity input in a second direction such that the housing rotates relative to the input shaft. The output shaft can be coupled to the input shaft and the housing to provide an output rotational velocity. Other embodiments are also claimed and described.

Abstract: Speed adjuster devices, systems, and methods are provided. The embodiments of the present invention can be used to effectively and efficiently mechanically couple components having different optimal rotational velocities. In an embodiment of the present invention, a speed adjustor device comprises an input shaft, an output shaft, and a housing. The input shaft can receive a first rotational velocity input in a first direction. The housing can receive a second rotational velocity input in a second direction such that the housing rotates relative to the input shaft. The output shaft can be coupled to the input shaft and the housing to provide an output rotational velocity. Other embodiments are also claimed and described.

Abstract: An environmentally non-intrusive multiple turbine unit for adjustable deployment in water. Counter-rotating turbines are captured in a shroud to define the turbine unit. The counter-rotation arrangement of the turbines effectively counteracts the rotational counter-torque of individual turbines, thereby enabling greater stability of the turbine unit in the flow of water without requiring rigid stabilizing structures.

Abstract: A bi-directional hydroturbine assembly for tidal deployment. A hydroturbine is carried by a cylindrical shroud. Rotation of the hydroturbine blades by tidal currents drives rotation of the shaft, thereby converting kinetic energy into electrical energy. Stabilizer fins extend radially outwardly from the shroud along substantially the entire length of the shroud. Each comer of each stabilizer fin carries a pivot point for connection of pivoting deflectors between adjacent pivot points of adjacent stabilizer fins at the same end of the shroud. Pivoting deflectors are positioned between pivot points about the periphery of each end of the shroud and are biased such that tidal current flow in a first direction urges pivoting deflectors at the first end of the shroud into a non-deflective position, while urging pivoting deflectors at the second end of the shroud into a deflective position, and vice versa for tidal current flow in the opposite direction.

Abstract: An environmentally non-intrusive multiple turbine unit for adjustable deployment in water. The turbines are captured in a shroud having an integrally formed augmentor ring and ballasting member to improve efficiency. The multiple turbine arrangement effectively counteracts the rotational counter-torque of individual turbines, thereby enabling stable deployment of the unit without requiring rigid stabilizing structures.

Abstract: A bidirectional hydroturbine assembly for tidal deployment. A hydroturbine is carried by a cylindrical shroud. Rotation of the hydroturbine blades by tidal currents drives rotation of the shaft, thereby converting kinetic energy into electrical energy. Stabilizer fins extend radially outwardly from the shroud along substantially the entire length of the shroud. Each corner of each stabilizer fin carries a pivot point for connection of pivoting deflectors between adjacent pivot points of adjacent stabilizer fins at the same end of the shroud. Pivoting deflectors are positioned between pivot points about the periphery of each end of the shroud and are biased such that tidal current flow in a first direction urges pivoting deflectors at the first end of the shroud into a non-deflective position, while urging pivoting deflectors at the second end of the shroud into a deflective position, and vice versa for tidal current flow in the opposite direction.

Abstract: The efficiency of a hydro-electric generator is improved by providing open-ended hollow tubes having influx ends proximate the axis and efflux ends proximate the periphery of a fan-bladed turbine. The jets of water developed by rotation of the fan-bladed turbine are directed against turbine vanes at the periphery of the fan blades. The device is particularly suitable for mounting in a water current such as in an ocean current or river.