An ocean wave energy converter (WEC) using one or more elongated light-weight low-cost surface floats, oriented and self-orienting parallel to oncoming wave fronts are mechanically linked to a motion stabilized or fixed frame or base through one or more power take-offs in such manner that multi-directional rotational and translational wave-induced forces and relative motion between the float(s) and base are efficiently captured. Some embodiments have at least one forward positioned float that moves upward and rearward on wave crests and downward and forward on ensuing wave troughs to capture a majority of both heave and surge wave energy components. Other embodiments also provide apparatus and means to totally submerge the floats during severe seas or adjust submerged depth and float mass to optimize performance.

This invention relates to an arrangement for a surface area adjustment of a reciprocating wing system in a wave energy recovery system where the wave energy recovery system comprises at least a body, a set of wings fastened to a support means that is hinged at its lower ends onto the body to make a reciprocating motion in response to kinetic energy of waves or tidal currents, and a power-take-off means. The arrangement comprises at least adjustment means capable to adjust the total effective surface area of the wings.

Provided are a floating structure fluid dynamic force use system and a wind-propelled vessel which uses the system whereby it is possible to compensate for overturning moment due to fluid dynamic force and to alleviate both tilting and size increases of a floating structure. A floating structure fluid dynamic force use system (1) comprises an assembly (12) which extracts energy from wind or water, and a floating structure (13) which supports the assembly (12). The assembly (12) comprises a wind receiving part (10) which receives fluid dynamic force, and a support column (11) which supports the wind receiving part (10). The assembly (12) is positioned with the center of gravity (15) thereof below the water line and is supported to be capable of tilting in an arbitrary direction upon the floating structure (13).

The present invention is a kinetic inshore wave energy conversion (WEC) device which uses the force of the wave to convert ocean water to pressurized water to eventually push on the blades of a turbine on shore to generate electrical energy. The WEC structure is affixed to a pipe reef structure with these pipes filled with water, submerged in the ocean and anchored to the ocean floor by a multiplicity of anchors. The dedicated pipes can run from any distance and extend all the way up to and underneath the shoreline and into a structure on shore which retains the turbine to convert the head pressure of the sea water to energy.

This invention relates to an energy transfer arrangement of a wave energy recovery apparatus comprising at least a base, a reciprocating panel, supporting legs and a pivot shaft for the reciprocating panel, and a driving and power-take-off arrangement equipped with an actuating mechanism and one or more power-take-off units to convert kinetic energy of waves or tidal currents to another type of energy, each PTO unit comprising a power transmission mechanism. The actuating mechanism is arranged to transfer the reciprocating motion of the panel mechanically to a linear motion of the power transmission mechanism of each PTO unit.

A device is provided that converts random movement of extrinsic oscillation from an ocean wave into purposeful movement, such as torque or other motion that can be used to generate electricity. This device may include but is not limited to two major components: 1) a collection unit and 2) a transmission unit. The collection unit represents the interactive part of the device that interfaces with an extrinsic force which provides the randomized kinetic motion that is translated by an actuating arm connected with the transmission unit into pivoting bidirectional movement along at least two directional axes, and may include a series of connected pivoting arms of different lengths. The transmission unit is the portion of the device that converts the pivoting directional movement of the actuating arm or arms into rotation of a drive shaft that is then converted into purposeful torque, and thus, electricity.

An apparatus is for producing electricity from a moving fluid, wherein the apparatus has: an elongated body having a longitudinal axis, the elongated body being arranged to be attached to the ground or seabed and exposed to the moving fluid; at least one tensioned cable, which is supported in tension from the elongated body, and which is arranged at least in part inside the elongated body and further arranged to oscillate or vibrate upon oscillation of the elongated body; and at least one energy harvester for converting kinetic energy of the at least one oscillating or vibrating tensioned cable to electric energy.

There is provided a wave power generation system comprising: first and second floating members to generate a floating force, wherein the first and second floating members are spaced from each other; first and second frames respectively coupled to the first and floating members; a pendulum swayably coupled to the first and second frames, wherein the pendulum is disposed between the first and second frames; a physical power converter operatively coupled to the first and second frames and operatively coupled to the first connection bars, wherein the physical power converter is configured to convert a pendulum movement force of the pendulum to a rotation force; a first wire operatively coupled to the physical power converter; a gearbox disposed on a land and operatively coupled to the wire, wherein the gearbox is configured to receive the rotation force from the first wire and to generate a continuous rotation force using first and second weights and one-way clutch.

This invention relates to a wave energy recovery apparatus with an energy transfer arrangement comprising at least a base, a reciprocating panel, a pivot shaft for the reciprocating panel, a control system, and a driving and power-take-off (PTO) arrangement equipped with an actuating mechanism (6), and one or more power-take-off (PTO) units to convert kinetic energy of waves or tidal currents to another type of energy, each PTO unit comprising a hydraulic power transmission mechanism having hydraulic cylinders with pistons inside the hydraulic cylinders. The pistons are fastened with their free ends to the common connecting plate that is arranged to move all the pistons simultaneously inwards into the hydraulic cylinders and to draw all the pistons simultaneously outwards from the hydraulic cylinders.

An absorber unit for absorption of wave energy from a body of water comprises a pivoting absorber element with a front end around which the absorber element reciprocates between turning positions. The absorber unit has a frame structure defining an absorber chamber and is at rest with respect to the body of water. The frame structure pivotally supports the absorber element within the absorber chamber from a horizontal front pivot axis above an average surface level of the body of water, wherein the absorber element in an idle position under still water conditions is partially submerged, with an idle draft of the absorber element being determined by the depth of submersion of the lower rear edge below the average surface level. A bottom plate attached to the frame structure has a front portion arranged underneath the absorber element and an upwardly projecting rear portion aft of the absorber element.