Abstract: A hydraulic actuator control system that includes an actuator. A pump pumps a hydraulic fluid to move the actuator. A first control valve fluidly couples to the pump. The first control valve provides a first hydraulic fluid flow to the actuator. A maximum first hydraulic fluid flow through the first control valve is less than a maximum required hydraulic fluid flow of the actuator. A second control valve fluidly couples to the pump. The second control valve provides a second hydraulic fluid flow to the actuator. A maximum second hydraulic fluid flow through the second control valve is less than the maximum required hydraulic fluid flow of the actuator. A controller controls the first control valve and the second control valve to provide the hydraulic fluid to the actuator.

Abstract: A wave receiving plate is pivotably supported by a support device in the wave force generation system and includes a flexible plate in at least a part of the wave receiving plate.

Abstract: A system reclaiming contaminated water includes a heat exchanger that receives the contaminated water and converts at least a portion of the contaminated water into steam and collects at least a portion of the contaminants within the heat exchanger. A thermal transfer fluid is heated by a heat exchanger is communication with a heat source. The heated fluid is circulated through the heat exchanger to heat the contaminated water. A steam engine is coupled to a generator, the steam engine receives the steam from the heat exchanger to drive the generator to provide power for the system. Steam exhausted from the steam engine is supplied to supplemental heat loads and then condensed in a modular condensing system. The collected contaminants are directed to an evaporation device to remove residual liquid.

Abstract: A system reclaiming contaminated water includes a heat exchanger that receives the contaminated water and converts at least a portion of the contaminated water into steam and collects at least a portion of the contaminants within the heat exchanger. A thermal transfer fluid is heated by a heat exchanger is communication with a heat source. The heated fluid is circulated through the heat exchanger to heat the contaminated water. A steam engine is coupled to a generator, the steam engine receives the steam from the heat exchanger to drive the generator to provide power for the system. Steam exhausted from the steam engine is supplied to supplemental heat loads and then condensed in a modular condensing system. The collected contaminants are directed to an evaporation device to remove residual liquid.

Abstract: The disclosure provides a device for converting wave motion into electricity, and methods of using the devices for generating electricity. The disclosure also provides a power generation device that includes a water blanket having a plurality of pods arranged in a grid for floating on the surface of a body of water. In one example, ball joints and hydraulic cylinders couple each of the pods to adjacent pods. Motors are coupled to the hydraulic cylinders such that a flow of hydraulic fluid created by expansion and compression of the cylinders due to movement of the pods causes rotational motion in the motor. Generators are coupled to respective motors to generate electricity from the rotational motion of the motors. Power from the ocean blanket can be supplemental with wind turbines, water paddles, water turbines, and solar cells.

Abstract: The invention relates to a mooring device that is suitable for use in water. The mooring device includes a pile configured to be embedded in a floor supporting the body of water, at least one arm configured to engage at least one entity; a joint configured to couple the pile and the at least one arm and permit rotation of the at least one arm relative to the pile, and joint locking means configured to lock the joint. The invention may further relate to a method of mounting the mooring device in water, a mooring system including multiple mooring devices and a system including the mooring devices.

Abstract: An apparatus for extracting power includes a track and an airfoil coupled to the track. The track includes first and second elongate sections, where the first elongate section is positioned above the second elongate section. The airfoil includes a pressure surface lying between a suction surface and the track, and is moveable in opposite directions when alternately coupled to the first elongate section and second elongate section.

Abstract: The invention relates to a wave power plant, comprising at least one floating power plant body and means for converting movement of the floating power plant body into a rotary motion for power take off. The floating power plant body (1) is adapted to perform a gyrating motion in response to waves.

Abstract: A wave energy converter (WEC) having an asymmetrically shaped float and a spar which move relative to each other in response to the waves. The asymmetrical float has one side longer than the other. A power take off device (PTO) is coupled between the asymmetric float and the spar for converting their relative motion into useful power. Apparatus is coupled to the WEC for: (a) orienting and rotating the longer side of the float to face and receive oncoming waves to increase energy capture when the waves have an amplitude below a predetermined value for improving the power generation of the WEC; and (b) rotating the float to orient the narrower side of the float to face and receive the incoming waves when the waves have an amplitude above a predetermined value, so as to reduce the forces to which the WEC is subjected. There is no known WEC system with an asymmetrical float which is raised and lowered by the waves.

Abstract: An underwater wave energy converter (WEC) (10) has a piston (32) that reciprocates up and down as recurring waves (22) pass over. Downward motion of the piston (32) drives the rods or plungers (50b) of a multiplicity of hydraulic jacks (50) to pressurize hydraulic fluid in an energy conversion system. Ultimately, the energy conversion system powers one or more hydraulic motors (511, 512) that drive an electric generator (510) or multiple generators. A sensor system (25) detects characteristics of in-coming waves such as by detecting changes in pressure as in-coming waves (22) pass over the sensor system (25). The sensors can be mounted on the ocean floor seaward from the WECs (10), and a control computer system (231) calculates characteristics of the in-coming waves such as wave height and speed data, and uses the data to control aspects of the WECs (10) and other components of the energy conversion system.

Abstract: The invention relates to a wave power plant, comprising at least one float or pontoon (1) or a plurality of interconnected floats or pontoons (2). The float or pontoon (1) is shaped or the interconnected floats or pontoons (2) are disposed asymmetrically relative to the advancing direction of waves, such that the float or pontoon (1) or a member (3) linking the interconnected floats or pontoons is set in a gyrating motion in response to the buoyancy of a succession of waves advancing in said direction. The wave power plant includes elements (5, 6, 7; 9, 10) for converting the gyrating motion into a rotational motion for power take-off.

Abstract: A method and system of connecting buoyant members of an Attenuator type Wave Energy Converter (WEC) for converting the energy of water waves to electricity. By coupling a joint between two buoyant members of the WEC into the hull of one of the members, removes the joint from the exposure of the elements, slowing down the wear and tear on the joint from wind, sun and water. Furthermore, any required repair of the joint occurs in the substantially dry hull of one of the members reducing the need for the repair to be conducted in water. The joint keeps the members linked during heave, roll and yaw forces placed on the linked members by the moving water.

Abstract: A wave energy extraction device (or paddle) for converting wave energy into mechanical motion is curved in the horizontal plane, with a concave side (11) facing the incoming waves to increase energy capture and a convex side (12) on the lee side to reduce energy dissipation. The concave surface is substantially parabolic or semi-elliptical and the convex side is optionally provided with a substantially Gaussian profile (4) to improve the hydrodynamics and provide additional strength. To simplify connection to a base platform the paddle curvature optionally tapers to a straight edge (1) at the mounting points and the base device can be located either above or below the water surface. One embodiment is also curved about a vertical as well as the horizontal plane to create a spoon- or cup-shaped paddle (9).

Abstract: A rotating wave energy machine includes at least one rotor that revolves in a synchronous manner for utilizing an orbital flow of an undulating body of water that circulates over the rotor. An output power is tapped at a rotor shaft and the power (in the power flow) is converted by at least one lift device of the rotor. A cross-section of the lift device includes at least one curve or angle that is shaped depending on a curve of a total flow. The at least one angle or curve is configured such that the influence of the relative flow on the total flow is taken into account. When the rotating wave energy machine is operational, the relative flow is superposed on the circulating orbital flow that acts on the lift device from outside, and a total flow is produced which is curved about the rotor shaft.

Abstract: A wave absorber element (100) of the front pivot type for the absorption of wave energy from a body of water has a front end (101) comprising a front pivot axis (1) around which the absorber element (100) swings under operation, and an absorber element body (103) being substantially defined by a front side (4) extending from the front end (101) to a lower rear edge (2), a rear side (5) extending from an upper rear edge (3) to the lower rear edge (2), a top side (6) extending from the front end (101) to the upper rear edge (3), and lateral sidewalls (7, 8) defining the width Fw of the absorber body (103) in an axial direction parallel to the front pivot axis (1). The lower rear edge (2) is located in a first radial direction (11) at a first distance from the pivot axis (1), the upper rear edge (3) is located in a second radial direction (12) at a second distance from the pivot axis (1), and the first and second radial directions (11, 12) define an acute tip angle (alpha) of the absorber element (100).

Abstract: An absorber unit 100 for the absorption of wave energy from a body of water 99 comprises an absorber element 110 of the front pivot type with a front end 111 comprising a front pivot axis 113 around which the absorber element 110 under operation reciprocates between a lower turning position and an upper turning position, and with a rear end 112 extending from a lower rear edge 114 to an upper rear edge 115. The lower rear edge 114 is located in a first radial direction 116 at a first distance from the pivot axis 113, the upper rear edge 115 is located in a second radial direction 117 at a second distance from the pivot axis 113, the first and second radial directions 116, 117 define an acute tip angle of the absorber element 110, and the first distance determines the absorber element length. The absorber unit 110 further comprises a frame structure 121 that defines an absorber chamber 122 and is configured to be essentially at rest with respect to the body of water 99.

Abstract: A wave energy converter comprises a pitching floating vessel and means for converting the pitching motion to electrical power. By varying the distribution of the ballast mass in the vessel and by varying the vessel's immersed length the moments of inertia of mass and of added mass are varied and wave-bridging is controlled. The immersed length of the vessel is varied by changing the draft of a v-shaped hull. Roll and yaw are suppressed by a vertical fin held at a substantial depth Inside the vessel is a compact pendulum that is a combination of tracked and folding pendulums. Both vessel and compact pendulum can be simultaneously and dynamically tuned over the range of periods that characterize high-energy ocean swells.

Abstract: A system and method for generating energy from the tuning 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 second mass can move relative to the first mass by various methods including rolling on a track or pendulum. The energy created by the relative motion can be converted to various forms of energy including electrical energy.

Abstract: In a wave powered electric generator system, multiple floatation devices are interconnected by torque arms arranged to convert pivotal movement of the torque arms due to up and down movement of the floatation devices, into one-way rotational movement of electric generator shafts, the torque arms being configured to permit expansion and contraction of their lengths when exposed to sudden, severe axial forces.

Abstract: The present invention relates to a damper for damping the reactionary motion of a wave energy conversion device to wave motion, comprising a damping energy absorber (7) having a reversible non-linear stress-strain response, arranged to damp the reactionary motion of the WEC. According to a first aspect, there is provided a damping structure (2) for a wave energy conversion device (1). The structure comprises a fixed member (6), and a damping member (7) having a reversible non-linear stress-strain response. The present invention also relates to a mooring component (2) for a mooring system (1) and to a method for manufacturing a mooring component (2). The component comprises a deformable element (6) having a reversible non-linear stress-strain response, wherein the response is a composite reversible non-linear stress-strain response.

Abstract: In accordance with the present invention, a Hydrokinetic & Wind Energy Harvester, placed in a wave-swash zone or in a flowing stream captures energy through water turbines and a wind turbine. A funnel guides water to converge and impinge on water turbines housed in a pipe. A trash guard attached to the funnel prevents trash from entering the pipe. A rotational transmission-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 in water, thereby enhances maneuverability of unit in water. Stabilization tank at the top when filled with water provides extra weight and stability against sliding and overturning of the unit in its operating location. An energy farm combines the energy of several units linked together; in coastal water, units form a seawall-like barrier mitigating coastal erosion.

Abstract: An electrical power generation device (10) utilising movement of the ocean comprising an elongate column (12) journalled in a support structure (14) for universal movement relative thereto. The support structure is adapted to be secured to the sea bed so that the column is disposed for at least partially submerged universal motion relative to the support structure automatically in response to force transmitted by movement of the ocean in which the support structure and the column reside. The support structure may contain an array of piston and cylinder assemblies (32) in such a construction the supported end (26) of the column is adapted to actuate one or more of the piston and cylinder assemblies in random sequence as a result of movement of the column relative to the support structure. The piston and cylinder assemblies are operatively connected to drive electrical power generators (40).

Abstract: A wave power generator that can efficiently perform power generation in response to ocean-wave periods, which are waves of varying period, is provided. A vibration receiving portion that is provided in a float floating at a wave surface and that performs power generation by means of vibrations exerted thereon; a mass body that applies a mass loading on the vibration receiving portion from above; a plurality of elastic members that support the mass body in series; and a plurality of locking mechanisms that restrict/release the motion of the plurality of elastic members are provided.

Abstract: An oceanic wave energy utilization system includes a floating energy collection device, an energy transfer device and an energy conversion device. The floating energy collection device is connected to the energy conversion device via the energy transfer device. The floating energy collection device is made up of a hull-shaped float and a float limitation device. Vertical energy collection plates are arranged at the underside of the float, while the energy transfer device is made up of a fixed seat and an energy transfer rod, said fixed seat being fixed at shore-side or at the seabed and movably connected to the energy transfer rod. The energy transfer rod is movably connected to the floating energy collection device and to the energy conversion device.

Abstract: A wave energy collecting device comprises an array of modules, each including three pairs of buoyant members arranged in a circular configuration, a tubular shaft connector interconnecting each pair of buoyant members, and a trilateral radial plank member comprising three identical equidistantly spaced members located centrally within the circular configuration. Each of the three members of the plank member is linearly connected to a member of the plank member of an adjacent module through a spring assembly and perpendicularly connected with a pivotally hinged shaft of a corresponding tubular shaft connector. A working fluid medium flows within a pipe network lined along sequential members. An array of pumps mounted onto each buoyant member, another array of pumps mounted adjacently each spring assembly and another array of pumps mounted adjacently each shaft, impart wave induced pressure pulses into the working fluid medium, which is subsequently converted into energy.

Abstract: A float for use in capturing energy from waves, said float comprising: a central body providing buoyancy, said float further comprising: a leading part which has a leading surface which, in use of the float, is inclined upwards from horizontal such that the top of said leading surface projects further from said central body than the bottom of said leading surface and/or a trailing part which, in use of said float, extends downwards from said central body and presents a trailing surface which is inclined downwards from horizontal such that the top of said trailing surface is closer to said body than the bottom of said trailing surface.

Abstract: Wave-Energy-Conversion (WEC) systems harness the water motion internal to waves propagating on large bodies of water to produce more readily usable forms of power, such as electricity. The water motion internal to a wave is oscillatory, and power is extracted from it by submerging structures that oscillate with the water, but more slowly. The power extracted from a wave is the product of the speed of the structure and the associated drag force on the structure. Because the structure moves more slowly than the water, increasing its speed reduces its speed relative to the water and with it the drag force. This tradeoff is optimized by maximizing the drag force for a given relative speed. The disclosed WEC systems exploit, in a variety of ways, the greater drag force provided by WEC structures of concave shape.

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 wave energy converter (10) for extracting energy from waves in a body of liquid. The converter (10) comprises an inflatable sleeve (12) having an air inlet (14) at or towards one end and an air outlet (18) at or towards its other end. A flexible diaphragm (22) is located within the sleeve (12) so as to extend lengthwise thereof. The diaphragm (22) is sealingly engaged with the sleeve (12) along opposed, elongate edges (22a,22b) thereof. A flexible spine (24) is retained within the diaphragm (22) so as to extend lengthwise thereof. The spine (24) is fixed with the diaphragm (22), relative to the sleeve (12), at or towards each end of the sleeve (12). The converter (10) also comprises a loading device operable to apply an axial compressive force to the spine (24) relative to the sleeve (12) such that, on operation of the loading device, the spine (24) and the diaphragm (22) are buckled into a waveform (26) constrained within the sleeve (12).

Abstract: A pump comprises a flexible container (11) filled with a fluid and having a fluid inlet (104) and a fluid outlet (105), and a constricting device (12), preferably in the form of a braid tube, conforming the container (11) to a generally circular cross-section and operable cyclically to reduce the diameter of the container (11) to expel fluid from the outlet and then allow the diameter to increase with fluid entering the inlet to refill the container (11). Such a pump can be suspended in the sea between an anchor and means for converting energy from the sea into a force acting on said constricting device, for example, a float, to cause the constricting device to reduce the diameter of the container (11) to expel fluid from the outlet (105), and then passing the expelled fluid to do work such as drive a generator (121).

Abstract: A buoyant actuator (19) for coupling wave motion to a device operable in response to wave motion in a body of water. The buoyant actuator (19) comprises a generally spherical body (20) defining an exterior surface and a hollow interior adapted to contain water received from the body of water. The exterior surface comprises a plurality of facets (101) which are tessellated. Typically, there are 36 facets (101), of which 12 comprise generally pentagonal facets (105) and 24 comprise generally hexagonal facets (107). The body (20) comprises a plurality of openings (143) for fluid flow between the hollow interior and the surrounding body of water. A closure configured as a flap (145) is provided for each opening (143) to block or at least inhibit fluid flow therethrough, the closure being adapted to move away from the opening to permit fluid flow therethrough in response to a predetermined fluid pressure differential imposed thereon between the hollow interior and the surrounding body of water.

Abstract: A tide activated power system has a plurality of horizontally oriented cylinders that each have a pair of chambers. The cylinders are carried on float/weight barges that are located in a lagoon. A plurality of float/weight barges each have at least two cylinders in series. Each cylinder has a chamber holding a piston movable in the chamber defining a pair of variable size chambers: a flood variable size chamber and an ebb variable size chamber. As the float/weight barge rises and falls on the tide in the lagoon, the variable size chambers vary in size and force a working fluid to a turbine generator to create electrical energy. The piston of each of the multiple cylinders of the multiple barges forces combined to move the working fluid above the turbine generator where the flow drives the turbine generator prior to returning to the cylinder. In alternative embodiments, other mechanisms convert the energy from the rising and falling of the flow/weight barges to a non-uniform motion in one direction.

Abstract: The invention relates to a wave power plant, comprising at least one floating power plant body and means for converting movement of the floating power plant body into a rotary motion for power take off. The floating power plant body (1) is adapted to perform a gyrating motion in response to waves.

Abstract: In accordance with the present invention, a portable wave-swash & coastal-wind energy harvester, once placed on a sea coast in the swash zone captures the mechanical energy contained in: (a) waves in the swash-zone, and (b) coastal-wind. Energy is extracted through: (a) wave turbines, (b) wind turbines, and (c) wave floats. A rotational transmission system with one-way clutches transmits torque to an alternator, while flywheels attached to the axles maintain steady rotation of axles. A wave funnel faces the waves and causes the wave uprush to converge toward wave turbines. A buoyancy chamber at the bottom produces reduction of weight of the portable wave-swash & coastal-wind energy harvester when water in the chamber is emptied and thereby enhances maneuverability of the unit on land and in water, while a stabilization tank at the top when filled with water provides extra weight and stability of the unit in its operating location.

Abstract: The invention relates to a method and an arrangement for recovering energy contained by waves. In the arrangement, a plurality of collecting devices (8) is coupled in series. Each collecting device comprises a float (7) coupled by means of a power transmission member (10, 11) to a motion converter (13). The coupling between the collecting devices may be mechanical, the motion converters being coupled up by means of an intermediate shaft (60).

Abstract: The stability and power conversion efficiency of a wave energy converter (WEC) which includes a float, a spar and a power taken device (PTO) connected between the spar and the float is increased by connecting a heave plate to the spar in a very secure manner and by carefully limiting the movement between the float and spar to one direction (i.e., up-down motion). Buoyancy chambers may be attached to the WEC to facilitate its transportation and deployment. The WEC may be formed in sections and assembled at, or close to, the point of deployment.

Abstract: A wave energy converter includes a flexible pipe and an inlet. The flexible pipe floats on the water surface, following the wave form. Slugs of water and air enter, one after the other, through the inlet. Because the flexible pipe follows the shape of the wave, water is transported through a manifold to a pressure chamber connected to a generator. The inlet consists of a hollow, inflexible pipe attached to the throat of the flexible pipe. The inflexible pipe is fixedly attached to a buoyancy tank or plurality thereof. The buoyancy tanks are arranged in a vertical plane or in tandem, with the inflexible pipe passing along the plane vertical to the fore and aft axis of the buoyancy tank and the frontward portion projecting sufficiently ahead of the buoyancy tank with the flexible pipe terminating at a singular outlet. The entire apparatus is facing the oncoming waves.

Abstract: A wave energy harvester (100A) includes an element (120A) that converts forward and/or backward of water in a wave (102A, B, C) passing the harvester (100A) into upward and/or downward movement to thereby increase the vertical amplitude of the harvester (100A) relative to the sea floor (104A, B, C). In most preferred aspects, the element (120A) is a hydrofoil that is coupled to the harvester (100A). Further preferred aspects include those in which part of, or the entire harvester (100A) has a neutral buoyancy, and where energy is extracted from the downwards movement of the neutrally buoyant part (100A) after a wave has lifted that part (110A).

Abstract: A wave power apparatus includes a plurality of rotationally supported arms, each of which carries a float (124) at its free end, so that a translational movement of the float caused by a wave results in rotation of the arm. The apparatus comprises power conversion means for converting power transmitted from the wave to the arms into electric power, e.g. a hydraulic system, in which a hydraulic fluid is displaced by the movement of the arms to drive one or more hydraulic motors. The plurality of are arranged in a row such that a wave passing the row of arms causes the arms to successively pivot with a mutual phase shift. Thereby, an even power output may be achieved, and the need for frequency converters may be reduced or eliminated. Preferably, each arm is connected to a hydraulic cylinder of the hydraulic system, whereby a plurality of arms feed hydraulic medium into the hydraulic motor or motors through common hydraulic conduits.

Abstract: An apparatus for wave energy harnessing includes at least one slide shaft, a buoyant unit, an energy-transmitting unit, and a rotate unit. The slide shaft is firmly mounted on the seabed. The buoyant unit is movably engaged with the slide shaft and has a reservoir and an adjusting board, so as to control the vertical position of the buoyant unit relative to sea level. The energy-transmitting unit is mounted on the buoyant unit. The rotate unit rotatably engages with the energy-transmitting unit and connects with an energy-transfonning unit through a transmission shaft. Thereby, the buoyant unit is driven by waves to vertically slide along the slide shaft, the energy-transmitting unit rotates the transmission shaft of the rotate unit, and, thus, the energy-transforming unit generates power.

Abstract: A cycloidal generator is provided to generate power from energy in a tidal flow. The generator includes a plurality of blades mounted on a hub for collective rotation about a hub axis, and a center shaft is positioned with its central axis oriented perpendicular to the tidal flow. Interconnecting the center shaft with each individual blade on the hub is a gear assembly that cyclically rotates the blade for autorotation of the hub in response to the tidal flow. A link assembly is also provided that interconnects the hub with the center shaft for rotation of the center shaft and the consequent generation of power in response to rotation of the hub.

Abstract: A long cylinder shaped beam is submerged in the ocean and suspended horizontally by multiple floats for converting ocean wave energy. The long length (at least the distance of the crest of two waves) and heavy weight of the beam, give the floats something stable to pull against. The weight of the beam pulling at the floats is transferred back and forth, as the ocean swells move over the beam, which activate machine components that may be installed in the beam, the floats or with rods connecting the floats to the beam. An individual float will not lift the beam except when the tide raises all the floats. The floats will pull and release the tension of the weight of the beam at randomly different times. The shape of the beam is straight. The ocean surface is continuously curving up and down and the beam will not bend to the shape of the ocean surface, but the floats will mimic the undulating or curvy shape of the ocean surface, and that motion actives the machine.

Abstract: A wind and wave energy plant (1) comprises a windmill with a rotor (3) and a wave-actuated water pump that can drive a turbine whose output shaft is in driving connection with an electric generator. The windmill includes a tubular mill tower (2), which is firmly anchored to the seabed and encloses a storage tank between the sea surface and the mill rotor (3), which tank can be filled with water by means of the pump via a non-return valve, and from which water can be led to the turbine.

Abstract: A device to convert vertical motion of waves in a body of water into useable work has hollow float (14) centrally mounted on vertical sleeve (16) sliding on fixed vertical shaft (10). Oscillations are converted into rotation via an opposing pair of pinion gears, transferring power from upstroke and downstroke respectively, by meshing with circular grooves (18) on sleeve (16). The device is protected from lateral and torsional forces of the waves by an encircling slotted wall (8). The float may be half filled with water to balance buoyancy and gravitational forces.

Abstract: A hydraulic circuit enables a plurality of hydraulic actuators to be locked or unlocked at the same time no matter whether control valves controlling pressurized oil feed to the hydraulic actuators are pilot-controlled or not. To this end, the circuit is provided with oil lines leading from hydraulic pumps to an oil reservoir without passing through the control valves and with first and second selector valves 20 and 24 opening or closing the oil lines.

Abstract: An improved electric power generation apparatus using a wave force and a method thereof which are capable of protecting the system from waves having a predetermined height higher than the previously set height based on the climate condition at the construction site of the system, which includes the steps of lifting/lowering a plurality of buoys in response to waves applied thereto, each of said buoys being connected to each of a plurality of support members disposed at a lattice-type frame submerged within sea, converting the lifting/lowering movement of each buoy into a rotation force, a driving compressed liquid generation unit provided at each buoy in cooperation with the rotation force, transferring the compressed liquid generated in the operation of the compressed liquid generation unit to a main transferring tube, driving a turbine using the compressed liquid transferred thereto through the main transferring tube, and generating power by driving a power generator drivingly communicating with the turbine

Abstract: An improved system for harnessing the energy of ocean waves to produce useful energy like electricity is disclosed wherein a power generating apparatus is attached to a support structure located out of the water and on dry land. The support structure comprises a mechanical boom disposed on a base located on the shore and a moveable mounting structure provided with a plurality of hydraulic cylinders such that the power generating apparatus may be moved in all directions and placed in position in the water flow optimal for the generation of power. The power generating apparatus comprises a selectively moveable turbine unit coupled to either a power generating mechanism, such as a generator, or pumping mechanism such that the rotation of the turbine unit due to the impact of the ocean waves can be converted into useful energy.

Abstract: A device for buoy based wave power apparatus, where the buoy (30) coacts with a cylinder piston arrangement which is connected to the sea bed, and where the arrangement is provided with the valve means (34, 35) enabling fluid flow through a piston (32) and possibly a piston rod (33) in said arrangement, a pressure being formed in one chamber (37) of the arrangement during the upward movement of the buoy (30) and simultaneously a suction via a snorkel or via focusing conduits/means (30', 44, 47) into that part of the cylinder which is adjacent the top face of the piston and which forms a second chamber (36). The piston rod (33) has mounted thereon a submarine buoy (29) or a sink member (80) and is articulated or flexibly (46) connected to a sea bed base member (40, 81). The cylinder (31) may be fixedly or articulated (68) connected with the buoy (30, 55, 67).

Abstract: A desalination apparatus including pressure responsive desalination means, a storage tank and conduit means connecting such storage tank to a pump mounted in a caisson defining a resonant chamber having an opening in one side thereof for receiving the incoming ocean waves. The caisson is configured in accordance with the natural frequency of the incoming waves and amplify such waves to drive a float coupled with the pump. Actuation of such pump pressurizes the storage tank to drive brine through the desalination means for separating therefrom potable water. The apparatus includes a turbine generator arranged to facilitate the pressurizing of the brine.

Abstract: Disclosed is a control apparatus for a variable-speed hydraulic power generating system comprising a variable-speed a.c. electric generator connected to an a.c. electric power system and a hydraulic machine system including a water turbine for driving the generator and a guide vane for controlling an amount of water supplied to the water turbine.