Abstract: A wave driven variable leverage pump for water desalination is disclosed. According to one embodiment, a variable leverage pump comprises a platform and a paddle comprising at least one lever arm extending therefrom. The at least one lever arm is pivotally coupled with the platform. The pump further comprises a pump having a first end pivotally coupled with the platform, and a second end pivotally coupled with the paddle. A pivot point of the at least one lever arm is located above a pivot point of the pump relative to the platform.

Abstract: A unique point absorber type wave energy conversion device is disclosed that includes a Power Take Off (PTO) which uses a torsion spring to return a vertical shaft to its original position after being rotated by a rope or cord that pulls a reel via a guide system. This spring return allows the PTO and housing to stay stationary under the wave energy while a buoy at the surface provides an oscillating linear movement. The oscillating rotary motion caused by the interaction of the buoy and spring is converted into a one directional motion via a one-way clutch and is transmitted to generators using a gearbox that increases rotational speed.

Abstract: An adjustable multi-functional bottom-hinged flap-type wave energy utilization device includes at least three wave energy conversion devices arranged in parallel and with adjustable spacing. Each wave energy conversion device includes a wave energy conversion component, a direction adjustment component for adjusting a wave-facing direction of the wave energy conversion component, and a height adjustment component for adjusting a height of the wave energy conversion component. The wave energy conversion component includes a mounting base plate, a transmission shaft arranged on the mounting base plate, a wave energy flap that can drive the transmission shaft to rotate, a generator connected to the transmission shaft, a hydraulic oil cylinder positioned on a back surface of the flap for pushing the flap to reset, and a wave monitor arranged on the mounting base plate for monitoring a draught and a wave direction angle of the flap.

Abstract: An ocean current power generation system which uses an inlet pipe to redirect the ocean current to a pool at the sea surface for power generation, the ocean current's kinetic energy is transformed into potential energy when the water flows into the pool and stored therein, an outlet pipe or path drains the stored water back to the sea and a generator or turbine is installed at the drainage path to generate electric power.

Abstract: The active water hydroelectric system uses a hydraulic ram pump to increase pressure to turbine blades using water from a low head water source, the system comprising a housing, drive pipe, delivery pipe, pressure vessel, turbine, waterwheel, and first and second generators. The drive pipe is fluidly coupled to the low head water source and pressure vessel. A primary flow moves across a turbine turning a first generator. Primary and secondary flows turn the waterwheel which turns the second generator. The passive hydroelectric system a floatation device such as a ship or barge. A vertical siphon pipe and vector siphon pipe comprise a siphon mechanism that delivers water to the hydraulic ram pump. A primary flow of water flows from the pump to a drive pipe to the turbine. Primary and secondary flows of water turn the waterwheel. Water exits through an exit pipe.

Abstract: 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.

Abstract: A wave energy converter (WEC) 10 has a body portion 18 with a face 20 and at least one flexible membrane 16 bounding at least part of a volume of a fluid to form a variable volume cell 22. The membrane is inclined from vertical providing a flow smoothed passage for wave energy from a wave 14 to travel over the WEC whilst deforming the at least one membrane towards the body to compress the fluid. The cell(s) can be submerged or floating. The inclination of the at least one membrane assists conversion of potential and kinetic energy of the wave to pressure within the fluid. Fluid pressure within the WEC cell(s) and/or system can be optimised to suit wave and/or performance conditions.

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 power generation apparatus for underwater power generation including at least two balloons completely submerged under a water surface of a water body, wherein a first balloon is filled with a gas and a second balloon is initially empty, a first and a second flexible hose, a plurality of hose reels, a plurality of pulleys, a cord connecting the first balloon and the second balloon, a pump connected to the first flexible hose and the second flexible hose in an airtight manner, a first valve, a second valve, at least two pressure sensors and at least two flow rate sensors, a generator. The apparatus further includes a power controller that reads data from the at least two pressure sensors and the at least two flow rate sensors to control the opening of the first valve, the second valve, and a pumping direction of the pump.

Abstract: A multi-stage pump system for use in desalination systems including a first stage S1 providing low pressure for priming the system a second stage S2 that is in fluid communication with the first stage and is primed by the low pressure from the first stage. The second stage S2B includes at least one reciprocating piston 122, in an enclosing cylinder 121, 121A and is attached to the two second flexible inflatable bladders 123. The piston 122 will move up and down within the cylinder 121 121A relative to the movement of the two second stage flexible bladders 123 due to priming by the first stage affecting their buoyancy. The driving fluid then passes into a passage 130 and is expelled to an outlet and Stage three (S3) at higher pressure when the first reciprocating member 122 proceeds through a complete stroke.

Abstract: An adaptive hydraulic pressure generator is provided for systems in which the mechanical force producing energy varies significantly, especially for wave energy systems. The pressure generator includes at least two fluid chambers with a piston surface/displacement surface arranged to reciprocate with the fluid chamber, whereby the piston surface/displacement surface acts on the fluid in the chamber by means of the said mutual reciprocating movement. The pressure generator is equipped with a control system which is arranged to connect the chambers to each other and/or to different pressure ducts in such a way that the effective area of the piston/displacement surfaces changes in accordance with the changes in the driving force exerted on the piston/displacement surfaces and/or the body forming the fluid chamber in such a way that the pressure produced by the pressure generator in the fluid supplied to the application exceeds the threshold pressure.

Abstract: An apparatus utilizing wave energy to capture ocean water and send it to shore for hydroelectricity, hydrodynamic energy conversion or desalination. The submerged device is located offshore and is preferably oriented orthogonal to the shoreline or the incoming water surges. Responding to underwater wave surges, a deformable bladder filled with sea water is compressed and the seawater contained therein is expelled and sent to shore. A one-way valve responds to the differential in water pressure inside the empty bladder as compared to outside the bladder and permits seawater to enter and refill the bladder. The bladder may have any of several forms including that of a bellows. The present invention discusses several ways by which the bladder may be compressed and several ways by which it can sense and respond to underwater wave surges.

Abstract: This is a low-cost, ingenious, high-efficiency energy producing system from hydrokinetic energy in water waves, currents and tides. Cost advantages are due to the use of existing bridge structures to mount the water energy converter to withstand fierce wind and water forces.

Abstract: A pumping apparatus for harvesting the wave energy and converting such energy into hydraulic power which may be transmitted and used to generate electricity or to produce desalinated water. The pumping apparatus has a float, an accumulator pressurized above the ambient pressure of the pump, the accumulator is charged with fluid and the pump is full of fluid. A check valve is closed and a pumping chamber is pressurized. An additional pumping chamber is also equally pressurized. An axial force is generated on a first tube by the pressure difference between its ends. An opposite axial force is generated on a second tube by the pressure difference between its ends. The second tube is larger in diameter than the first tube and hence the magnitude of the force on the second tube is greater. The resultant of these forces is balanced by a portion of the buoyancy of float.

Abstract: A hydraulic pump unit includes a cylindrical member that is fit into an outer circumference of the main shaft and a hydraulic pump body arranged on an outer circumferential side of the cylindrical member. The hydraulic pump body includes a ring cam mounted on the outer circumference of the cylindrical member, a pump bearing, a pump housing, a plurality of pistons housed in the pump housing and actuated by the ring cam, and a plurality of cylinders which guide the plurality of pistons in a radial direction and are arranged in a circumferential direction. The hydraulic pump unit is configured such that the pump unit is insertably fixed to the main shaft by the cylindrical member.

Abstract: Apparatus (10) for harnessing ocean wave energy and for converting the harnessed energy to high pressure sea water, typically above 100 psi and preferably above 800 psi. The high pressure seawater generated by the apparatus (10) can be piped to shore for use in any appropriate purpose. The apparatus (10) comprises a float (12) buoyantly suspended within the body of seawater (1) and a pump (13) operatively connected to the float (12). The pump (13) comprises an intake chamber (47), a discharge chamber (49) and a piston (61) extending between the intake and discharge chambers (47, 49). The piston (61) comprises a tube (63) having a flow passage (102) extending between the intake and discharge chambers (47, 49). The piston (61) and discharge chamber (49) cooperate to define a pumping chamber (100) adapted to undergo expansion and contraction in response to reciprocatory motion of the piston. The piston (61) is operatively connected to the float (12) to be driven by upward movement of the float.

Abstract: A wave energy converter for compressing air from the movement of waves of a body of water is provided. The wave energy converter includes a middle cylinder upon which an upper cylinder slides thereon and in which a lower cylinder slides therewithin. An upper and lower compression chamber disposed within the upper and lower cylinders allows air to be drawn therewithin and compressed when the upper and lower cylinders are moved relative to the middle cylinder as waves progress through their wavelength from crest to trough and vice versa.

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 primary piston that is connected to a secondary piston that is part of a compressor, primary and secondary piston are connected by a connecting rod, the primary piston is driven by the pressure and vacuum produced by a pressure chamber that is driven by the variation of the sea waves. The output of the compressor is applied to a pressure tank, and then the out put flow is controlled and applied to the turbine.

Abstract: A wave energy conversion apparatus comprises:-a mechanical element arranged in operation to move repeatedly in a cycle in response to wave motion, wherein the speed of the mechanical element varies between a maximum and a minimum during each cycle; power extraction means arranged to extract energy from the movement of the mechanical element; and movement assistance means arranged to assist the movement, in response to the wave motion, of the mechanical element, during at least one part of the cycle during which the speed of movement of the mechanical element is substantially equal to the minimum for that cycle, wherein the power extraction means comprises a fluid pressurisation system that is arranged so that in operation fluid in the fluid pressurisation system is pressurised in response to movement of the mechanical element, the fluid pressurisation system comprises a one-way valve for transferring pressurised fluid from the fluid pressurisation system and the movement assistance means is located upstream o

Abstract: An object of the present invention is to provide a hydraulic pump structure which improves the ease of mounting the hydraulic pump on the main shaft, and a method of mounting the hydraulic pump which can be performed in a simplified manner. A hydraulic pump unit 10 is formed by unitizing a cylindrical member 46 fit into an outer circumference of the main shaft 12 and a hydraulic pump body 76 arranged on an outer circumferential side of the cylindrical member 46. The hydraulic pump body 76 comprises a ring cam 52 mounted on the outer circumference of the cylindrical member 46, a pump bearing 54, a pump housing 34, a plurality of piston 58 housed in the pump housing 34 and actuated by the ring cam, and a plurality of cylinders 60 which guide the plurality of pistons in a radial direction and are arranged in a circumferential direction, and the hydraulic pump unit 10 is configured such that the pump unit 10 is insertably fixed to the main shaft 12 by the cylindrical member 46.

Abstract: A hydraulic power device is provided. The hydraulic power device includes: a first cylinder with a cylindrical chamber, a first fluid inlet, a first fluid outlet, and a weight unit having a first piston. The first piston hermetically fits into the first cylinder and moves upwards and downwards within the first cylinder. When the first piston moves downwards within the first cylinder, the fluid in the cylindrical chamber flows out through the first fluid outlet under the pressure from the first piston, and thereby generates hydraulic power. When the first piston moves upwards within the first cylinder, the fluid flows into the cylindrical chamber through the first fluid inlet, to get prepared for subsequent hydraulic power output. The hydraulic power device in the present invention is designed to lift a weight unit with a small initial power and then generate hydraulic power utilizing the gravity of the weight unit.

Abstract: A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control.

Abstract: The invention herein proposed describes a plant operated by the movement of floaters (A) connected to horizontal arms (B). These arms (B) move hydraulic pumps (C), which inject water into the hyperbaric chamber (E). This chamber (E) supplies water through an outflow control valve, to set in motion a conventional turbine (G) that connected to electric generator supplies electricity.

Abstract: A buoyant hydro turbine(31) for capturing and utilizing energy in the currents of flowing water. A driven component(33) produces electricity or other energy is coupled to and supported by a buoyant rotor(64), increasing efficiency and eliminating the need for an independent supporting structure. Tethered in flowing water, the current(71) rotates the rotors(32) and transfers rotatable energy to the central driven component(33) where electricity or other mechanical work is produced. A number of embodiments are adapted for optimizing and maintaining positioning in a stream of moving water. Additional embodiments optimizing the efficiency and effectiveness of the turbine in capturing and utilizing the current's kinetic energy as well as hydrostatic pressure.

Abstract: A wave energy conversion system includes a barge support frame having a frame superstructure and a plurality of frame support legs selectively extendable from the frame superstructure, a barge carried by the barge support frame and at least one wave energy conversion pump comprising a water transfer conduit carried by the barge support frame and having a filter port and an inner water transfer space disposed in fluid communication with the filter port, a pressure conduit mounted for displacement on the water transfer conduit and having an outer water transfer space disposed in fluid communication with the inner water transfer space and a buoyancy vessel carried by the pressure conduit. Also disclosed are a power generation pumping system and a river or stream fed system having tanks to contain and pressurize water to a force sufficient to drive turbine generators for electric power production and potable water use.

Abstract: A pump assembly comprises a first piston near a lower end of a coiled water and/or other condensed liquid discharge conduit, which is actuated by second and third pistons that are arrange at the upper and lower ends of a hydraulic or pneumatic fluid conduit, wherein the third piston is connected to a floating body, which is oscillated by waves, such that a pair of one way check valves suck and push production water and other condensed liquids sequentially from a lower region of the well into a lower portion and subsequently into an upper portion of the coiled water and other condensed liquid outlet conduit.

Abstract: A stationary structure is mounted on the floor of an ocean or other body of water subject to wave motion. The structure provides a floatation body that moves with the waves and is able to drive a sealing plate in a compression chamber. When the water level changes, or wave action magnitude changes, a second sealing plate is able to move automatically to maintain a constant size of the compression chamber. Air compressed in the chamber is let into a tank to maintain a constant elevated pressure in the tank and the air pressure is used to power a turbine to generate electricity. In an alternate embodiment, a mechanical linkage drives the turbine directly.

Abstract: A device for the generation of energy and in particular electrical energy includes a cell or chamber which moves upwardly and downwardly in a body of water. Cog wheels are connected to the cell. The cog wheels are connected to the shafts of generators. Rotation of the cog wheels operates the generators which produce energy. The cog wheels engage anchor chains or vertical supports. One end of each anchor chain is secured to an anchor located at the bottom of the body of water. The other end of the anchor chain is secured to a float which floats at or near the surface of the body of water. The up and down movement of the cell causes the cog wheels to move upwardly and downwardly along the anchor chains and thereby rotate. This rotation drives the energy generator and generates energy, preferably electricity. The cog wheels are permitted to rotate upon the receipt of a request for energy. This results in a highly efficient source of energy or electricity.

Abstract: The invention relates to a method for generating energy from an undulating movement of a medium such as seawater, comprising of following the movement of the medium, wherein a direction of movement of the movement changes at a point in time, converting the followed movement into energy, interrupting the following of the movement for an interruption period close to the point in time, wherein conversion of energy comprises of pumping a fluid with the followed movement by feeding and discharging said fluid.

Abstract: An energy conversion system comprising a support structure upstanding within a volume of water subject to the occurrence of both wave motion and tidal flow, a first apparatus mounted from the support for deriving usable power from the tidal flow, and a second apparatus operationally supported relative to the support structure for deriving usable power from the occurrence of wave motion independently from that derived from tidal flows and power transfer apparatus for facilitating the transfer of such usable powers to a land based location, or for making some alternative use of such power elsewhere.

Abstract: A method and apparatus for pumping deeper water from a large body of water to an upper portion thereof using wave energy, thereby increasing nutrients at said upper portion and thus the fish populations thereof.

Abstract: A system and method for generating electricity using a hydro-hydraulic gravitational generator. In such a system, a main housing that is disposed in deep water may be exposed to deep water pressure. A piston disposed in the main housing may be raised as water enters the main housing. Water passing through water turbines generate electricity in this phase. After the piston is raised to its highest point within the main housing, the main housing may be exposed to atmospheric pressure such that the gravitational force on the piston expels the water that was just drawn in. The expelling water also may generate electricity by being passed though water turbines. The cycle may be repeated and electricity may be continuously generated.

Abstract: Power plant comprising: a lower level reservoir, a feed-through (line, hose, pipe, channel) for fluid communication from the lower level reservoir to a higher level reservoir, characterised by a pump arranged in connection with the feed-through in order to pump water from the lower level reservoir to the higher level reservoir in order to store energy by emptying the lower level reservoir, and a turbine/generator for power production arranged in or at the lower level reservoir in connection with said feed-through, or additional feed-through, for fluid communication between the lower level reservoir and the higher level reservoir for power production during flow of water from the higher level reservoir to the lower level reservoir. A method for power production. Use of the power plant.

Abstract: A wave energy converter for compressing air from the movement of waves of a body of water is provided. The wave energy converter includes a middle cylinder upon which an upper cylinder slides thereon and in which a lower cylinder slides therewithin. An upper and lower compression chamber disposed within the upper and lower cylinders allows air to be drawn therewithin and compressed when the upper and lower cylinders are moved relative to the middle cylinder as waves progress through their wavelength from crest to trough and vice versa.

Abstract: A completely submersed means of extracting energy from a tidal flow is particularly adapted to pump water to be stored and used around tidal change periods or to stabilize the output of offshore windmills. It can be retrieved and brought to the surface for maintenance and also repositioned on the sea bed, by remote control. Operation of its reaction means is automatically limited to prescribed water depths.

Abstract: Systems, processes, and techniques for harnessing the dynamic energy of a fluid body may be used to generate electric power. In particular implementations, harnessing the dynamic energy of a fluid body may include the ability to follow movements of a fluid body and pressurize a volume of fluid due to following the movement. The pressurized volume of fluid may be used, at least in part, to drive an electrical power generator.

Abstract: Apparatus (10) for harnessing ocean wave energy and for converting the harnessed energy to high pressure sea water, typically above 100 psi and preferably above 800 psi. The high pressure seawater generated by the apparatus (10) can be piped to shore for use in any appropriate purpose. The apparatus (10) comprises a float (12) buoyantly suspended within the body of seawater (1) and a pump (13) operatively connected to the float (12). The pump (13) comprises an intake chamber (47), a discharge chamber (49) and a piston (61) extending between the intake and discharge chambers (47, 49). The piston (61) comprises a tube (63) having a flow passage (102) extending between the intake and discharge chambers (47, 49). The piston (61) and discharge chamber (49) cooperate to define a pumping chamber (100) adapted to undergo expansion and contraction in response to reciprocatory motion of the piston. The piston (61) is operatively connected to the float (12) to be driven by upward movement of the float.

Abstract: In a method for converting fluctuating energy into a stable energy supply, the fluctuating energy is derived from the group of solar energy, wind power, waves or water currents, this energy being delivered to a first pump being integrated in a pressure circuit for delivering stable energy and the pressure circuit comprising a pressure amplifier with a double-cone device being driven by the liquid flow circulated by the first pump. This allows the stabilisation of fluctuating energy to be used e.g. in desalination plants without supplemental storage energy and without reverting to electric current conversion.

Abstract: A device for a wave-powered generator which is provided with at least one energy generator and lines for transferring energy to a consumer, the wave-powered generator comprising a main module provided with a running rod which is substantially vertical in its longitudinal extent, several supporting devices arranged around a portion of the running rod and arranged for sliding or rolling movement on surface portions extending in the longitudinal direction of the running rod, at least one sheave which is arranged to roll on the running rod, and transmission means which are arranged to translate the rotating motion of the at least one sheave into rotation of the drive shaft of the at least one generator; and a first float which is floatingly disposed in an area affected by waves and which is connected to the running rod by a primary driving line substantially of tensile strength.

Abstract: Driving apparatus for a wave power device, in which a turbine is placed in a substantially stationary open tubular element, the tubular element extending through the water surface into the water, and in which the amount of water flowing into and out of the tubular element due to a varying wave height around the tubular element, has to pass the turbine; alternatively, the tubular element being placed substantially horizontally below the water surface, a flow of water passing through it, the turbine being connected to a supported turbine shaft, and the turbine shaft being provided with a co-rotating eccentric part, the eccentric part being surrounded by a freely rotatable eccentric bearing connected to the eccentric part, and the eccentric bearing forming the driving part of a fluid pump.

Abstract: An apparatus for storage of potential energy using water from a deep body of water is described. The apparatus comprises one module including a cylinder, a piston slidably connected to the cylinder, a column for storing the water from the deep body of water received through an inlet being in communication with the cylinder/piston, and a connecting tube which mutually connects the cylinder and the column. The apparatus further comprises driving means for reciprocally displacing the piston in relation to the cylinder, wherein the driving means is a crankshaft drivingly connected to the piston and at least one flywheel mounted to the crankshaft for counteracting the pressure as result of the water stored in the column.

Abstract: The invention relates to a method for utilising wave energy. In the method, the reciprocating movement of a water mass (5) in the vicinity of the bottom (6) of a water basin is adapted to actuate a body (2) or its part attached to the bottom of the water basin, the kinetic energy of the body (2) or its part being recovered into an energy reserve (3), and the energy being transferred from the energy reserve to the object of application. The invention also relates to the apparatus (1) used in the method.

Abstract: A tidal generator system is provided that includes a containment tank, and a ring mechanism provided about the containment tank to rise and fall based on tidal actions. A valve mechanism allows a liquid to pass into the containment tank. Additionally, a turbine/generator system generates electrical energy based on the liquid passing through the valve mechanism.

Abstract: An omni-directional system configured to convert the kinetic and potential energy in ocean waves to electrical energy or in some special cases to other forms of energy such as heat, mechanical and pressure energy. The system employs a float moored by a single hydraulic cylinder anchored to the seabed. Wave energy is captured as the float is displaced vertically and horizontally in response to wave action extending the hydraulic cylinder that in turn forces fluid under high pressure to the float where appropriate valves, hydraulic accumulators, and variable displacement hydraulic motors are arranged to drive electric generators. A secondary benefit of the system is the reduction of near shore erosion.

Abstract: An impulse-type “wave motor” employs a seabed-mounted or supported structure mounting a wave energy absorbing panel on a hinged lever arm for reciprocation motion to obtain optimal absorption of wave energy from wave motion in the sea. For deepwater wavelengths of L, the panel is optimally positioned in a region within L/2 depth from the sea surface. The panel motion is coupled by a connecting rod to a fluid pump which generates a high-pressure fluid output that may be used to drive a reverse osmosis desalination unit or to produce other useful work. Seawater or brackish water may be desalinated through reverse osmosis membranes to produce water quality for consumption, agricultural, or other uses. The submerged operating environment of the device in a region of one-half the design wavelength provides the maximum available energy flux and forced oscillations. The pump may be of the positive-displacement piston type, plunger type, or multi-staging driver type, or a variable volume pump.

Abstract: A buoyancy engine, including an upper casing, a lower casing, and a manifold separating the upper and lower casings. The manifold has internal and external control means, that control amounts of liquid entering and leaving the manifold and casings through a primary route and an alternate route. There is a variably ballasted power piston within the upper casing, into and out of which liquid ballast can be pumped to change its buoyancy. There is a liquid discharge piston within the lower casing, that can be coupled to the variably ballasted power piston to form a primary pump. There is also a backup pump that can be used when the primary pump fails. A mechanical slide valve controls the entrance and exit of liquid from the manifold through the primary route.

Abstract: A tidal-powered desalinization system is mounted on a barge that oscillates about fixed pier structures, generating a two-way pumping action. The two-way pumping action is changed to a single direction flow of seawater. The sea water is directed into an on-board desalinization system. Fresh water is produced and collected in reservoirs, without an intervening generation of electricity.

Abstract: Apparatus for converting the motion of sea wave energy to electrical energy includes one or more float driven linear generators, in which the inertial mass of the float and any linkage means to the linear generator is minimised. In order to generate electrical power consistently upon both the upstroke and downstroke of the float, the moving part of the generator is so sized that its gravitational weight acting upon the float, together with that of the float itself and any intermediate linkage means, is substantially equal to half the total buoyancy of the float.

Abstract: A system and method for producing energy comprising an impoundment area having at least one buoyancy device positioned therein and extending from a pressurization assembly. The impoundment area is preferably positioned with respect to a lifting fluid source such that, by opening an inlet, lifting fluid will flow into the impoundment area to create a rising fluid level and will cause a motive fluid to flow into the pressurization assembly. The lifting fluid can then be removed from the impoundment area to cause the motive fluid to be pressurized. The pressurized motive fluid will preferably be delivered to a fluid turbine.