Abstract: An energy accumulator and rectifier equipment for converting and generating renewable energy from ocean waves and winds, which includes a storage tank or compressed air accumulator, a series of vertical tubes filled with non-compressible fluid so that it can displace movable elements, forming a group, wherein each group is in connection with another similar group at both the upper level and the lower level by means of a fluid circulation pipes and by means of a pipe of smaller diameter, at the upper and lower portion, for air circulation, and wherein the fluid circulation pipes of every group are attached to a common pipe at the upper level which conveys the fluid toward a turbine-generator to produce electricity and a common pipe at the lower level to recirculate fluid toward the cylinders.

Abstract: Wave energy conversion device (WEC) comprising a means for damping the reactionary motion of a wave energy conversion device to wave motion, which is a cylindrical bellowed elastomeric member that acts under axial compression.

Abstract: Apparatus and method for generating electrical energy from a body of water flowing in a downstream direction are disclosed. A lever arm including a flap member is coupled to a rotatable shaft. The lever arm is movable from a first vertical position where the flap member is located in the body of water and a second vertical position where the flap member is in located above the body of water. When the lever arm is lowered into the first vertical position, the body of water engaging the flap member pushes the lever arm from an upstream position to a downstream position. The rotation of the lever arm from the upstream position to the downstream position actuates the rotatable shaft, which can be coupled to a power generation device configured to generate electrical energy from motion of the rotatable shaft.

Abstract: Roughness is added to the surface of a bluff body in a relative motion with respect to a fluid. The amount, size, and distribution of roughness on the body surface is controlled passively or actively to modify the flow around the body and subsequently the Vortex Induced Forces and Motion (VIFM). The added roughness, when designed and implemented appropriately, affects in a predetermined way the boundary layer, the separation of the boundary layer, the level of turbulence, the wake, the drag and lift forces, and consequently the Vortex Induced Motion (VIM), and the fluid-structure interaction. The goal of surface roughness control is to increase Vortex Induced Forces and Motion. Enhancement is needed in such applications as harnessing of clean and renewable energy from ocean/river currents using the ocean energy converter VIVACE (Vortex Induced Vibration for Aquatic Clean Energy).

Abstract: A wave power converter employing a flow-controlled duct for capturing and converting useful wave surge energy to electric power over a relatively broad range of surf or river flow conditions. The power converter includes an inclined ramp with several openings for receiving wave or river water and retaining surge water in hydraulic isolation, permitting water to flow into a flow-controlled conduit and a generator for producing electrical power from water flow in the conduit. The power converter apparatus is suitable for low-cost manufacture, offers simple robust operation suitable for underdeveloped regions of the world, may be fabricated from commonly-available components, requires few moving parts and no valuable (lootable) components other than a generator, and is self-flushing for low maintenance operation.

Abstract: There is disclosed a hydro-electric generating device comprising a solid plate fixedly supporting two bearings, which bearings rotatably support a shaft, the plate has a cutout fillable with water subjected to wave motions; a turbine fixed on the shaft. The turbine has a plurality of blades disposed in the cutout. The device further comprises a transmission, kinematically connected to the shaft, an electrical generator mounted on the plate and driven by the transmission, and a forklift furnished with wheels. The plate is secured on the forklift, and the forklift provides for a three-dimension adjustment that constitutes relocation of the generating device along the coastal line, displacement of the generating device from and to the current waterline, and vertical displacement of the plate and turbine of the generating device depending upon the current wave height. The device can be supplemented by a mat placeable on the coastal surface.

Abstract: A method for storing potential energy and generating electrical energy. The method has the steps of accumulating and storing potential energy, converting the potential energy to mechanical energy at the election of a user, and converting the mechanical energy to electrical energy. There are various embodiments of energy storage and generation systems for carrying out the steps of the method.

Abstract: A system and method for harnessing power associated with ocean waves and converting that power into electricity. The apparatus is a buoy that houses a vertically oriented central shaft, a pendulum, a generator mechanism, and other components that synergistically operate to optimize power output of the buoy. Both the load on the pendulum and the effective length of the pendulum may be varied in response to changing environmental conditions. Also, the buoy may be part of a network that shares environmental data and a series of best tuning responses to that data, across the network. A library of environmental data and associated tuning responses is built at a central location and shared across the network.

Abstract: Synchronous generators are driven by shafts to produce 3-phase AC power. The frequency and amplitude of power depends on the speed of the respective shaft. The outputs are rectified and connected in series to provide an output of varying voltage DC power to a load. Applications in aerospace and renewable energy supply are described.

Abstract: The Wave Gear Drive, WGD system is a new method for directly converting sea wave energy to mechanical drive using wave undulations and a buoyant float directly acting on a spiral spring or rack and pinion or power pulley system to drive a rotary or reciprocating water pump that pumps a small quantity of water to a high head, collect it and feed it directly or in conjunction with a water reservoir on top of the offshore WGD system supporting structure, to a hydro turbo generator to generate leveled electric power covering the full wave cycle duration and transmit it to the shore using power and control cables laid at the sea bed, or to drive a polyphase generator to generate electric current, control and condition it to operate in parallel, and transmit it to shore using power and control cables laid at the sea bed; in addition to ebb/tide turbo generators and wind turbo generators that are part of the offshore REWGD system which provides access platform for the wind turbines for ease of construction and maint

Abstract: In accordance with the present invention, a portable wave-swash & coastal-wind energy harvester, placed on a sea coast in swash zone captures energy contained in coastal waves and in coastal-wind through the utilization of wave turbines, wind turbines, and wave floats. Wave-float levers carrying wave floats and wave turbines, swing and maintain lower halves of wave turbines below water always. A gear system with one-way clutches transmits torque to an alternator to generate electricity. Flywheels maintain steady rotation of alternator shaft. A buoyancy chamber at the bottom produces reduction of weight of the unit when buoyancy chamber is emptied of water, and thereby enhances maneuverability of unit in water. Stabilization tanks at the top when filled with water provide extra weight and stability of the unit in its operating location. Units linked together in an energy farm combine their energy while forming a seawall-like barrier offering protection against coastal erosion.

Abstract: A tidal current power generator according to an embodiment of the present invention includes: a generator column; an impeller-type rotating blade provided on the upper portion of the generator column; and a first sealed chamber having a bottom portion formed with a lower inlet into which a rotating shaft of the impeller-type rotating blade is vertically introduced and having an inner space in which a vertical shaft generator is disposed to produce electrical energy from the rotational motion of the rotating shaft of the impeller-type rotating blade.

Abstract: A piston pump is anchored to the ocean floor with the piston rod connected to a float that rides on the surface waves. The pump connects to a sparge line that discharges a spray of water through the float to indicate proper pump function. The float is formed with a conical upper portion and a conical lower portion and has an annular resilient rim. An array of pumps sends water under pressure through an aquaduct to an onshore electric power generation station, optionally including a reservoir. Water is returned from the generation station to the vicinity from which it was pumped.

Abstract: A system to harness energy from water waves, comprising a frame assembly, first and second hydraulic systems, at least one float assembly, and an electrical assembly. The float assembly comprises front, rear, bottom, top, and first and second lateral faces. The float assembly further comprises a trailing face. The trailing face and the rear face merge to define an edge. The float assembly is mounted onto the mounting plate. The float assembly is placed in a body of water that comprises wave forces. The electrical system comprises a generator. The generator produces electricity when driven by the hydraulic motor when hydraulic fluid is displaced and pressurized within a hydraulic system when the wave forces cause the float assembly to move when in the body of water.

Abstract: The present invention relates to a platform for capturing wave energy suitable for deep and ultra-deep bodies of water, comprising a cover (1) supported on a submerged hull (2) by means of hydrodynamic pillars (3) uniformly distributed along its sides. Its plan view is V-shaped and it is self-orienting such that the wave front moves forward perpendicularly to its plane of symmetry. The wave energy is absorbed by means of separate capture modules (4) which, located between the pillars (3) along the sides, come into contact with the waves progressively as they move forward, which makes it possible to convert their periodic movement into a continuous movement. The platform is stabilized using large ballasts (8) connected, by means of mooring lines (9), to the lower edge of its pivot shaft (10), which allows it to automatically position itself correctly at all times.

Abstract: A floating energy generating device includes at least two wind turbines mounted on a floating open structure, the floating open structure being moored to the seabed with a mooring system, each wind turbine featuring in operation mode a blade and rotor part mounted at the top of a tower and being connected via a cable to a central control power electronic unit on the floating open structure, the central control power unit being connected to a submerged high voltage power export cable for exporting the electricity generated by the at least two windmills, characterized in that the floating open structure being connectable to or disconnectable from the mooring system and that when disconnected from the mooring system, the center of gravity of the floating open structure is at or below its center of buoyancy.

Abstract: The invention relates to a grid-connected power plant, having the following systems which are adjusted in their capacitance to each other: a) a wind power plant, water power plant, solar-thermal system and/or photovoltaic system for the production of electrical energy for operating the systems b) through f); b) a CO2 absorption system for the absorption of atmospheric CO2; c) a CO2 desorption system for the desorption of the CO2 gained in b); d) an electrochemical or solar-thermal H2 synthesis system for the operating system e); e) a synthesis system selected from the group catalytic methanol synthesis, catalytic DME synthesis, catalytic methane synthesis; f) a storage system selected from the group methanol storage system, DME storage system, methane storage system. The invention also relates to the use of such a power plant and methods for the operation of such a power plant.

Abstract: A power generation system includes a plurality of submerged mechanical devices. Each device includes a pump that can be powered, in operation, by mechanical energy to output a pressurized output liquid flow in a conduit. Main output conduits are connected with the device conduits to combine pressurized output flows output from the submerged mechanical devices into a lower number of pressurized flows. These flows are delivered to a location remote of the submerged mechanical devices for power generation.

Abstract: A wave energy converter has a shell, a pendulum pivotally positioned in the shell, a magnet thereon, a variable inductor positioned in the shell, a pendulum adjustor for changing a center of gravity of the pendulum, a motion sensor positioned in the shell, a position sensor connected to the pendulum, a rotation sensor connected to the pendulum, and a controller connected to the motion sensor and the position sensor and the rotation sensor. The pendulum has a magnet thereon. The magnet of the pendulum oscillates adjacent the variable inductor. The variable inductor can adjust the inductive capacity.

Abstract: A wave energy generator includes a float for floating on the surface of a body of water. An electrical energy generator that is capable of generating usable electrical energy from the kinetic energy of waves is mounted to or otherwise engaged with the float. The electrical energy generator includes a housing, a coil of electrically conductive material, a reciprocally movable electromagnetically active mass, and springs for connecting the mass to the housing. The electrical energy generator may optionally include spring adjustment means engaged with the housing, means for constraining non-linear motion of the electromagnetically active mass, and/or means of mitigating motion retardation of the electromagnetically active mass within the housing.

Abstract: The invention is a two-way generation tidal power plant with bypasses participating in generation. The preferred embodiment of such a tidal power plant has a power house with one-way turbines and additional head and tail reservoirs formed by additional barrages in the basin and the outer bay. The purpose of this invention is to increase the energy production per each tidal cycle and the water volume used for it. The closer this water volume to the water volume filling and emptying the basin under natural conditions without barrage, the smaller is the environmental impact of the tidal power plant. In order to achieve this, the main barrage is equipped with bypasses, the sluices passing water during the final phases of the ebb and the flood generations in parallel to the power house turbines and having a discharge capacity up to 15 times higher than the discharge capacity of the turbines.

Abstract: Deployed laterally (broadside to the waves), this power plant hydraulically converts the breadth of waves into electricity. Costly hydraulic motors, generators Etc. need not be duplicated for each unit in series. Depleted waves break gently. Sand put into suspension by the turbulent release of energy from waves crashing onto un-harvested beaches, carried by the alongshore current to calm water, settles and remains. Replenishment is the natural by-product of wave energy conversion, avoiding costly, environmentally intrusive dredging and pumping. At sea, extensions aid energy harvesting from swells. In series, it defends against oil spills Etc. from washing up onto beaches. Free floating, easily removed for maintenance when tourism takes priority over energy, beach replenishment and oil spill protection. When the series is to be transported over long distances at sea, inclined planes can be pivoted 90 degrees enabling the series to be self-propelled by the swells to its new site.

Abstract: A wave powered electrical generator includes: a floating unit that floats in water and accommodates a power generator therein. The floating unit has a wave power system that includes, a chamber containing fluid, a free-floating mass provided in the chamber that separates the chamber into first and second chambers defined at each side of the mass, a first valve that allows the fluid in the first chamber to be discharged from the first chamber as the free-floating mass moves toward the first chamber, and a second valve that allows the fluid in the second chamber to be discharged from the second chamber as the free-floating mass moves toward the second chamber. The fluid discharged through the first and second valves flows into a pipe that discharges the received fluid from an end thereof against a turbine attached to a power generator.

Abstract: A system for harvesting, storing, and generating energy, that includes floating structure supporting machinery to extract energy from wind, waves, surface generators, or currents. At least one energy storage and power generating unit is anchored to the seafloor and adapted to tether the floating structure to the unit. The unit includes an internal chamber into which water flows through a hydroelectric turbine to generate electrical energy. A pump is provided, powered by energy from the floating structure machinery, to evacuate water from the unit and a control system directs power from the machinery to pump water out of the unit during periods of excess energy extraction by the machinery and to allow water to flow into the chamber through the hydroelectric turbine to generate electrical energy during periods of lower energy extraction by the machinery.

Abstract: One embodiment of the present invention consists of a system of small, interconnected cubes, each containing interior walls made from a highly sensitive multi-layer piezoelectric material and each having heavy mass, such as stainless steel, inside the cube interior. An elastic material layer covers the heavy internal mass that is in contact with the piezoelectric cube walls. As the system moves with the water, the heavy mass inside each cube exerts varying inertial forces on the cube walls causing a piezoelectric current to be generated. However, the cell walls may also be constructed using commercially available piezoelectric materials. This approach is a second embodiment of the current invention and includes the same system design as the first embodiment except that the internal cubic cell walls are fabricated in a unique manner using commercially available piezoelectric materials, rather than the non-central symmetric LB poly-vinylidene fluoride (PVDF) multilayer piezoelectric material.

Abstract: An ocean wave power device, including a floating body, an electric generator, multiple water wheels, and a hydraulic accelerator, the electric generator is fixed on the floating body, the rotating shaft is disposed between the hydraulic accelerator and the floating body, and capable of rotating with respect to the floating body and the hydraulic accelerator, the top of the rotating shaft passes through the floating body and is connected to a rotor of the electric generator, the bottom of the rotating shaft passes through the hydraulic accelerator and is fixedly connected to the water wheel, a water channel is disposed on the hydraulic accelerator, and operates to form high-speed flow whereby driving the water wheels to rotate in the same direction.

Abstract: A wave energy converter has a primary body interconnected to a secondary body such that the bodies may oscillate longitudinally relative to one another. A slug mass is visco-elastically connected to the primary body. The slug mass has effective mass, stiffness and damping characteristics. A generator is drivingly connected between the primary and secondary bodies. The generator has a load damping characteristic. At least one of the characteristics is dynamically controllable, allowing the bodies' longitudinal motion to be varied in response to wave motion changes of the wave environment in which the wave energy converter is deployed, to maintain out-of-phase oscillation of the bodies, thus increasing the driving force imparted to the generator and thereby increasing the generator's electrical energy output.

Abstract: This invention is a device for transforming the energy of water waves into useable energy. The device comprises two or more floats, structural members connecting the floats, a means for transferring torque, and one or more generators.

Abstract: An energy generator for generating energy from renewable alternative sources, includes: a flotable platform adapted to be partially immersed in a fluid; a tower element arranged on the platform and including at least one wind generator for collecting wind energy and converting the same into electric energy, at least one first energy accumulator and at least one inverter. The energy generator further includes at least one system for storing and converting mechanical energy; the system for storing and converting mechanical energy including at least one charge mechanical accumulator, at least one flywheel balance coupled with the charge mechanical accumulator and a device for converting mechanical energy into electric energy.

Abstract: The purpose of this invention is to present a device for utilisation of the horizontal component of wave motions in which there is no proportionality between the installed power and the initial costs of the device. According to the invention, this is obtained with a device which contains at least one oblong supporting structure and three or more independently movable resistance elements.

Abstract: The present invention relates to a wave energy conversion device (1), for use in relatively shallow water, which has a base portion (2) for anchoring to the bed of a body of water (6) and an upstanding flap portion (8) pivotally connected (12) to the base portion. The flap portion is biased to the vertical and oscillates, backwards and forwards about the vertical in response to wave motion acting on its faces. Power extraction means extract energy from the movement of the flap portion. When the base portion (2) is anchored to the bed of a body of water (6) with the flap portion (8) facing the wave motion, the base portion (2) and the flap portion (8) extend vertically through at least the entire depth of the water, to present a substantially continuous surface to the wave motion throughout the full depth of water from the wave crest to the sea bed. A plurality of devices can be interconnected to form one system. The distance between the plurality of flaps is dependent on the wavelength.

Abstract: The present disclosure includes apparatus, methods, and systems for power generation. One power generator embodiment includes a shaft; a buoyant assembly slidably coupled to the shaft upon which the buoyant assembly rises and falls, the buoyant assembly configured to be moved in at least a first direction by a fluid on which the assembly is buoyant; wherein a first generator is arranged to create electric energy from interaction of a conductor with a number of magnetic elements on the buoyant assembly, in a manner to produce electricity, as the buoyant assembly moves on the shaft when falling in a second direction due to a gravitational force; and a slowing mechanism arranged to slow the movement of the buoyant assembly in order to separate an outer surface of the buoyant assembly from the fluid along at least a portion of the first or second direction.

Abstract: A method and apparatus for harnessing power associated with ocean waves and converting that power into electricity. The apparatus is a buoy that houses a vertically oriented central shaft, a pendulum, and a generator. As the buoy tilts from the vertical under the influence of wave motion, the pendulum is accelerated and rotates about the central shaft. A centrally-placed generator is mechanically coupled to, and driven by, the rotating pendulum so that the pendulum's kinetic energy is converted into electricity. The electricity may be stored at or near the buoy or transferred to a remote facility. Moreover, a fin array located along the bottom of the buoy serves as an anti-torque mechanism and improves the operational efficiency of the electricity production. The method involves employing use of the centrally located generator and the fin array to efficiently harness wave power.

Abstract: The invention relates to a device for the utilisation of wave energy, with an increased efficiency. Thereto, the device according to the invention comprises a Darrieus rotor having at least two Darrieus rotor blades, wherein the Darrieus rotor has a solidity ?D, and a Wells rotor having at least two Wells rotor blades, wherein the Wells rotor has a solidity ?W, wherein the Darrieus rotor and the Wells rotor are rotatable about a common axis of rotation A, and ?W is larger than or equal to ?D. The invention also relates to a method for harnessing wave energy.

Abstract: The present invention relates to a method for producing electromechanical converters, to the use of solutions of at least one polyurethane in one or more organic solvents to produce electromechanical converters, to electromechanical converters produced therefrom and to the use of such electromechanical converters.

Abstract: The invention relates to a wave-power unit for the production of electric power. It comprises a floating body (1) arranged for floating on the sea and an electric linear generator (2) having a stator (5) and a translator (8) reciprocating along a center axis. The stator (5) is arranged to be anchored in the bed of the sea and the translator (8) is connected to the floating body (1) by connection means (3, 7). According to the invention the generator (2) is enclosed in a water-tight encapsulation (4) having an upper end wall with an opening through which the connection means (7) extends. The opening has a seal (12) that seals against the connection means (7). The seal (12) is flexibly mounted. The invention also relates to the use of the wave-power unit and to a method for producing electric power.

Abstract: A device for generating electric energy (1) from a renewable source, in particular from wave energy, comprising an oscillating device (2) that can transform the thrust of a natural agent on the first extremity of oscillating device (2) into kinetic energy; a motor unit, operatively connected to a second extremity of the oscillating device in such a way as to receive the kinetic energy transmitted by the oscillating device (2); and an electrical rotating machine operatively connected to the motor unit and suitable for producing electricity when it is set to rotating by the said motor unit.

Abstract: Power generation technology using tidal power or wave power is provided, especially as related to power generation technology using a piezoelectric element. Power generation technology includes a power generation device for effectively generating electric power in water or on a ship with the use of tidal power or wave force and having power generation modules (5a, 5b) having a piezoelectric element (14) put between plates (1a, 1b, 1c). The plates are placed between two flanges (9b, 10) fixed to a rod (3) penetrating the plates. When the rod (3) inclines due to a water flow, the piezoelectric element (14) is compressed by the two flanges (9b, 10) which generates electric power. Moreover, when the rod (3) is restored from due to reduction of the water flow, thickness of the piezoelectric element (14) is restored which also generates electric power.

Abstract: A wave powered electrical generator includes: a floating unit that floats in water and accommodates a power generator therein. The floating unit has a wave power system that includes, a chamber containing fluid, a free-floating mass provided in the chamber that separates the chamber into first and second chambers defined at each side of the mass, a first valve that allows the fluid in the first chamber to be discharged from the first chamber as the free-floating mass moves toward the first chamber, and a second valve that allows the fluid in the second chamber to be discharged from the second chamber as the free-floating mass moves toward the second chamber. The fluid discharged through the first and second valves flows into a pipe that discharges the received fluid from an end thereof against a turbine attached to a power generator.

Abstract: The invention relates to a wave-power unit for the production of electric power. It comprises a floating body arranged for floating on the sea and an electric linear generator with a stator (5) and a reciprocating translator (6). The stator (5) is arranged to be anchored in the bed of a sea and the translator (6) is connected to the floating body by connection means, The translator (6) is journalled in a plurality of roiling elements (15) such that a circumferential gap (14) is formed between the stator and the translator. According to the invention each rolling element (15) has an elasticity that is low enough to meet the condition that a change in the width (d) of the gap results in a change in the total force from the roiling elements (15) that is larger than the total magnet forces on the translator resulting from the change in width (d). The invention also relates to a use of the invented wave-power unit.

Abstract: An apparatus converting the energy of waves on an open body of water includes a submerged articulated frame or frames formed of rods arranged largely in a parallelogram. The frame or frames are arranged so that as a wave passes the frames, the frames are distorted by having their rods rotate about connecting pivot points and so move toward and away (as well as relative to) from each other. This movement is then converted into energy. In alternate embodiments, multiple interconnected frames are provided, each pivoting in a respective plane.

Abstract: A system and method for generating energy from tuning the natural frequency of masses relative to a ground plane and an external force. In some embodiments the external force is the action of the waves. The system has a first mass movable relative to the ground plane, wherein the external force induces an oscillation in the first mass relative to the ground plane. A second movable mass is carried by and movable relative to the first movable mass. The second movable mass creates kinetic energy as the result of varying the position of the second movable mass relative to the first mass. The system adjusts or tunes the frequency of various components in relation to the natural frequency of the waves. The energy created by the relative motion can be converted to various forms of energy including electrical energy.

Abstract: An ocean wave energy system is for generating power from ocean waves. The system comprises wall components defining one or more channels for guiding propagation of ocean waves therealong. Each channel has a first end for receiving the ocean waves and a second end remote from the first end. A float arrangement is disposed along each of the one or more channels between its first and second ends. Moreover, the float arrangement being arranged in size to progressively absorb energy from the ocean waves commencing with longest wavelength components in the waves and finishing with shortest wavelength components in the waves. The ocean wave energy system is capable of extracting energy efficiently and conveniently from ocean wave motion.

Abstract: The invention concerns an apparatus for converting wave energy into electric power, comprising a closed floating element (1) and a mass forming element (2), the mass forming element (2) being arranged inside the floating element (1) and mounted mobile relative to the floating element (1), the mass forming element (2) being adapted to be set in relative motion with respect to the floating element (1) under the action of the waves on the floating element (1). The invention is characterized in that it also comprises locking means (13) adapted to lock the movement of the mass forming element (2) and control means adapted to control the locking means (13) for selectively locking or releasing the mass element (2) so as to amplify the movement of the mass forming element (2) by constant adaptation to the dynamics of the apparatus to successive waves.

Abstract: An underwater substation pod (USP) adapted to collect and process the electrical outputs of an array of offshore power generating devices includes a voltage boosting transformer for combining and transmitting with increased efficiency an amplified version of the collected electrical outputs to an on shore facility. Combining the outputs and transmitting at a higher voltage reduces transmission losses and the number of cables required to transmit the electrical outputs. The USP is mounted on the seabed but operated at atmospheric pressure to accommodate standard components. The pod may be designed to include remotely controlled operation and to have a long service life since few, if any, moving parts are used. Also, the equipment may be designed to have a high degree of redundancy to provide greater reliability.

Abstract: The invention relates to a wave-power unit with a floating body (1) connected by flexible connection means (3) to a translator (6) reciprocating in a linear generator (2), The floating body (1) is arranged for floating on the sea and the stator (8) of the generator for anchoring on the sea bed, According to the invention the connection means is guided by a guiding device (9) through lower and upper openings, The part of the connection means (3) that momentary is within the guiding device (9) is thereby guided to be aligned with the translator movements adjacent the lower opening and to be allowed to be inclined adjacent the upper opening. The invention also relates to a use of the invented wave-power plant and to a method for producing electric energy.

Abstract: An ocean wave energy extractor includes a first flotation device that contains a second flotation device and a mechanism for extracting energy. The wave energy extractor floats in seawater and extracts energy from waves. A propagating wave rotates the first flotation device relative to the second flotation device. The mechanism is connected to both flotation devices and generates energy from this relative rotation. In one example, a first flotation device includes a spherical chamber with a flotation collar, and a second flotation device supported by a joint at a center of the chamber. A wave approaching from any direction rotates the first flotation device relative to the second flotation device, and a mechanism for extracting energy generates electrical energy from the relative rotation. The chamber shields inner components from seawater and adverse ocean conditions. The wave energy extractor need not be moored to a location to extract energy from waves.

Abstract: A generally horizontal distensible tube (1) in the sea containing fluid and oriented in the direction of wave travel, the distensibility being chosen so that the propagation velocity of pressure waves inside the tube (bulge waves) is the same as the velocity of propagation of the waves in the sea. Energy is then transferred from the ocean waves to the bulge wave. Energy extraction means (84, 85) at the stern and/or bow convert the bulge power to useful energy. Said energy extraction means may comprise pistons actuating pumps or linear or rotating generators, or one-way valves allowing the bulge wave to pump fluid via hydraulic accumulators through a turbine. The walls of the distensible tube (1) may be comprised partly of elastomer (86) and partly of inelastic flexible polymer coated fabric (87).

Abstract: A seesaw-type wave power generating device (1) includes: a first buoy (10); a second buoy (20) disposed on one side of the first buoy (10); an impeller generator (30) disposed between the first buoy (10) and the second buoy (20); a first connecting pipe (42) having both ends communicated with the first buoy (10) and the impeller generator (30); and a second connecting pipe (42) having both ends communicated with the second buoy (20) and the impeller generator (30). A liquid (2) is filled in the first buoy (10) and the second buoy (20). The first buoy (10) and the second buoy (20) bob on the water and water waves (4) causes the liquid (2) to flow back and forth between the first connecting pipe (41) and the second connecting pipe (42), thereby driving the impeller generator (30) to generate electricity. The present invention is easy for implementation and maintenance.

Abstract: Apparatus and method is disclosed for generating usable power derived from oscillatory hydro-kinetic energy available in the movement of waves having a given height and being spaced apart by a predetermined distance at the surface of a body of water. Apparatus and method is disclosed for generating usable power derived from hydro-kinetic energy available in a body of water moving in at least one direction of movement, the at least one direction being substantially horizontal or substantially vertical. Apparatus and method is disclosed for generating usable power derived from hydro-gravitational forces available at a site having a source of water at a first elevation higher than a second elevation at a selected location where the usable power is to be derived.