Abstract: Includes at least one floating body (1), and is characterised in that includes a device (2) fitted inside said body (1) for transforming the movement of the floating body (1) into pneumatic or hydraulic energy and means for transmitting the energy to dry land or to a fixed structure. An energy-generation system is obtained thereby with a manufacturing time and cost lower than the systems currently known. Moreover, the fact that the transforming device (2) is fitted inside the floating body (1) means that it is protected against corrosion caused by the water, against sharp movements caused by marine currents and against other possible outside agents which might harm or damage any of the components which make up the device.

Abstract: The wave force machine as such is constructed in such a way that it is capable of utilizing the upward force from the waves with (FIG. 1) the force from float (1) and rocker arm (3) via rocker arm pipe (4), wherein 1 or more lock bearings are provided, which transfer the upward force causing the driving force shaft (8) to rotate in the same direction. On each driving force shaft (8) may be one after the other of mounted float, rocker arm and rocker arm pipe with lock bearings after the other, and several driving force shafts (FIG. 6) (6,7,8 and 9) may be interconnected both horizontally and vertically to toothed wheel (1, 2, 3, 10, 11, 12, 13 and 14) shown here with 4 driving force shafts, but in principle any number of shafts may be interconnected. The total force from the driving force shafts may be brought to gearbox and electric generator and used in electricity production. 3 wave force machines may e.g. be interconnected to form e.g.

Abstract: A tidal irrigation and electrical system used to harness the power of the ocean tide to generate electricity, create sustainable aquaculture, act as a CO2 sink, and generate hydrocarbons. An artificial atoll is created on the continental shelf to define a lagoon completely isolated from the surrounding ocean. As the tides rise and fall, the natural tidal action draws nutrient-rich, cold seawater into the lagoon to stimulate the growth of biolife. As the ocean tide falls, the natural tidal action draws the lagoon water out of the lagoon and through a biofilter to remove the biolife prior to discharge of the water back to the ocean.

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: A wave energy conversion apparatus is described. It comprises at least two devices (3, 4), each comprising a surface float (5, 6), at least one of the surface floats being rigidly attached to a submerged body (9, 10). The movement of the two devices in response to a passing wave may be used to effect an energy transfer.

Abstract: Disclosed is an apparatus and method for generating energy, and in particular electrical energy, using fluid supported bodies, each disposed in one of a plurality of chambers filled with a fluid. The fluid, which issues from a fluid source, has a density which is greater than the body so that the bodies are all buoyant, and therefore float, in the fluid. A rotatable shaft is supported above the chambers, with each of said bodies being coupled to the shaft through a clutch mechanism for driving the shaft in rotation. An electrical energy-generating device may be coupled to the shaft for generating electrical energy when the shaft rotates. Conduits interconnect the chambers with the fluid source, and fluid level sensors and valve means communicating with the conduit means and the chambers for regulating ingress and egress of fluid from the chambers. The fluid in each of the chambers is selectively evacuated whenever the body in the respective chamber has been lifted to a preselected height within the chamber.

Abstract: Apparatus for converting energy contained in surface waves on a body of water to useful energy comprises a float from which is suspended a fully or effectively fully submerged inverted cup-shaped member having a closed top end and an open bottom end. Disposed within the top space is a compressible fluid separated by a flexible membrane from a column of water filling the bottom open end of the submerged member. Passing surface waves cause pressure variations at the bottom end of the member causing changes in the water column height and corresponding changes in the buoyancy of the member. The buoyancy changes induce vertical oscillations of the member relative to the float and known means are used for converting the relative movements of the float and submerged member to useful energy. Preferably, the float vertically oscillates in synchronization with the passing waves, and the vertical movements of the float increase the relative movements between the float and the submerged member.

Abstract: A pair of articulated rods connect between a float and a pair of shafts through a one-way clutch on the respectively shafts. When a float rises an “up” connecting rod causes the “up” shaft to rotate as its clutch is engaged, and when the float falls, that clutch disengages, allowing that shaft to freewheel. Likewise when the float falls a “down” connecting rod causes the “down” clutch to engage and the “down” shaft to rotate, typically rotating opposite the rotation of the “up” shaft. When the float reverses and begins to rise again, the “down” clutch disengages and the “up” clutch reengages. A connecting rod hand member connected pivotably to the forearm at a wrist joint is adjustable in length. The wrist joint adjusts the effective length of the hand member to change the stroke of the machine to match wave amplitude through a computer-controlled pneumatic actuator.

Abstract: A system for using tidal or wave action to compress air at a high pressure and produce electricity. The system includes a piston contained in a chamber including an air intake port. The chamber is connected to an air storage tank through a valve. A moveable power transfer shaft contained in a sleeve guide has a float disposed on ocean waves providing motion to the shaft. A lever arm is contacted by the power transfer shaft at one end and is connected to the piston at another end. As the power transfer shaft is upwardly displaced by the float, so is the lever arm at one end causing the piston to compress air within the chamber at another end. When a dual piston embodiment is employed, air is compressed upon upward and downward movement of the power transfer shaft. In an alternative embodiment, a gear mechanism is employed to transfer the linear movement of the power transfer shaft to the pistons. In both the lever and the gear embodiments, the air is compressed and stored at a high pressure in a storage tank.

Abstract: An air compressor system utilized in a body of water that produces compressed air from water wave energy. The air compressor system includes floating structures in a body of water designed to receive ambient air and produce compressed air, utilizing a bellow assembly. The air compressor system converts water wave energy into storable and consumable energies, such as compressed air in a storage tank. The instant invention primarily comprises a low-wave air compressor, high-wave air compressor, and a stabilizing system.

Abstract: A floating modular system for the protection of harbours and the transformation of energy, consisting of: a plurality of modules (1) made of metal and/or reinforced marine concrete box-structure, comprising internal air spaces (2) for determining the floating thereof and a lower flooded room (4) for the stabilization, under the impact of the sea waves against the level surfaces (6) for their reflection, for the protection of the opposed harbour environment (AP), provided with floating quays (7); a series of floats (8) applied to the wave front of the modules (1), operated by the wave motion for absorbing their energy by double effect pumps (9) with the successive transformation into electric energy; a self-levelling system for the anchorage of each of the modules (1), with self-distributed traction; a system for balancing the tide variations and for levelling the modules (1); a system of joints for coupling the modules (1) according to the extension.

Abstract: A pump (10) comprises a pair of bladders (28,30) attached to respective opposite sides of a flexure plate (32) for pumping fluid by alternately compressing and expanding the bladders. Each bladder has at least one input connector (22, 34) with a one-way valve (38) therein and at least one output connector (24, 36) with a one-way valve (40) therein, in order to provide one-way flow of fluid through each of the bladders. The pump (10) is positioned to be acted upon by a moving liquid, such as natural wave action of a body of water, for example, by being connected to floating objects on the surface. The moving liquid causes the flexure plate (32) to bend in an undulate manner, first in one direction and then in the other. This bending action causes fluid to be alternately drawn into and expelled from the bladders as the bladders are alternately expanded and compressed.

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: An apparatus and method as seen in FIG. 2 for converting the motion of waves on a body of fluid 52 into useable energy. This apparatus employs a wave follower 20 to track the rising and falling waves. The reciprocating wave follower interacts with a driven device, such as a pump 202a or generator 202b through an optional lever arm 171 and also through a drive member such as a reciprocating shaft 26. Because the driven device is incorporated into an essentially immovable floating or fixed support member 17, work is accomplished. By increasing the work producing travel distance of the driving member, being the wave follower 20 beyond that of previous art and, in certain embodiments such as that shown in FIG. 2, and by more effectively capturing surge forces that has previous art, this apparatus is intended to produce significantly more work than other similar devices operating in the same waves.

Abstract: A wave pump activated by a wave energy for conveying a water to a desired place. The wave pump includes a tiltable hollow piston tube having an upper portion and a lower portion. The lower portion is communicated with a submerged pipe and the upper portion extends vertically upward toward a water surface. A piston portion is formed at an outer periphery of the hollow piston tube, and a cylinder which defines a cylinder chamber above the piston portion is fitted over the piston portion such that the cylinder can slide up and down. The cylinder is equipped with a float for moving the cylinder up and down such that a flow of water is generated in the hollow piston tube and submerged pipe.

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: Piezoelectric electrical generators comprise cantilevered beams of piezoelectric material, cross sections of the beams preferably being triangular and of increasing area from free end to fixed end. Arrays of spaced apart beams are disposed in overlapping, interdigitated relationships with arrays of cams, and the cam arrays are moved relative to the beam arrays for causing engagement and deflection of the beams by the cams for the generation of electrical energy. One system comprises a raft floating on the surface of an ocean. Cam arrays are suspended from the raft for interaction with vertically extending beam arrays mounted on the ocean floor beneath the raft. Relative vertical movements are caused by passing surface waves. In another system, beam arrays are suspended from an above surface structure, e.g., an oil drilling ocean platform, and the beam arrays extend towards and interact with cam arrays mounted on the upper surface of a floating raft.

Abstract: A wave energy device comprising a tube assembly comprising a plurality of open pipes of different lengths and natural resonant frequencies each (FIG. 8) where each tube (13) floating upright in the water (FIG. 2), with the tower end of the tube open to the water and generally disposed below the effective wave base. There is an air column above the water in the tube. Turbine (17) is provided for harnessing power from fluctuations in the air column caused by the changing water level (16) in the tube as a result of the wave motion of the surrounding water (11).

Abstract: A multi-tiered support structure, with each of the tiers having a horizontally rotating pivoted arm having a float and paddle arrangement on one end and the opposite end is attached to an air compressor. As the waves hit the paddles the pivot arms will operate the compressors to store energy. This energy can then be used to produce electrical or other types of 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 system for converting the mechanical energy of ocean waves to electrical energy comprises a weighted member supported from a piezoelectric element for applying a preselected strain to the element. In one embodiment, the element is supported by a float floating on the surface of the water. In another embodiment, the element is supported above the surface of the water and the weighted member, of negative buoyancy, is immersed in the water. The system functions, in use, as an oscillating, weighted spring and, for tuning the system to cause it to enter into mechanical resonance in response to passing waves, means are provided for tuning the natural frequency of the oscillating system.

Abstract: Disposed within a float on the surface of a body of water is a vertically suspended, resilient piezoelectric element provided with a preselected strain by a hanging weight. The piezoelectric system functions as a weighted coiled spring which is driven into oscillation in response to movements of the float in response to passing surface waves. Preferably, the natural frequency of the system is selected in correspondence with the frequency of the passing waves for causing the system to oscillate in resonance with the passing waves. Additionally, a mechanism is provided for automatically adjusting the natural frequency of the system in response to changing wave conditions for maintaining the system in resonance with the waves.

Abstract: A known type of piezoelectric power generating system for converting the mechanical energy of waves on a body of water comprises a float and a piezoelectric power generating element suspended, under tension, between the float and a bottom anchor. For preventing excessive vertical stretching of the piezoelectric element in response to the presence of excessively high waves, a protective element is coupled between the float and the bottom anchor for effectively limiting the rise of the float above a preselected height corresponding to the maximum straining desired for the piezoelectric element. The coupling is automatic and occurs only at those instances when the piezoelectric element elongation is approaching its maximum amount, and automatic decoupling occurs immediately upon the float falling to a height where non-excessive straining occurs.

Abstract: A wave motion power generator comprising a frame, including ballast members and buoyancy members, first cross members extending between opposed buoyancy members, a plurality of pairs of cylinders, a hollow piston rod associated with each cylinder, support bars extending upwardly from the second cross members, a buoyancy plate having elongate openings through which the support bars extend, the buoyancy plate being connected to the piston rods associated with a pair of the cylinders, a pressure reservoir, a manifold connected with the reservoir, a flexible conduit connected between each piston rod and the manifold and an electricity generator driven by liquid discharged from the reservoir.

Abstract: An apparatus and method for converting the motion of waves on a body of fluid into useable energy. The apparatus includes a floating or fixed rotatable support structure, a lever arm(s) pivotally supported from the support structure, and a wave follower fixed to one end of the lever arm(s) and positioned on the body of fluid. The lever arm is connected to an energy transfer device such as a piston rod which drives a load in response to the action of waves on the wave follower. The wave follower is designed such that the upper portion is constructed of a buoyant substance and the lower portion constructed in the form of a hollow chamber, open at the bottom, with the seaward face being angled so as to harness the energy of the lateral force of the wave. The open bottom of the wave follower allows the chamber to fill with fluid generally on the rise of a wave. When the fluid level drops, a suction is created in the chamber by the closing of a valve located in the upper portion.

Abstract: The improved hydrodynamic variator of velocity comprises a pump (3) having radial pistons and a hydromotor (4) also having radial pistons. At least the pump is arranged with a variable eccentricity and there is provided a central body (56) the latter having frontal distributors (30 and 31) which are placed in communication with the radial cylindrical cavities respectively of the pump and the hydromotor by means of the openings of the conduits (32 and 33). By varying the eccentricity of the pump, the rate of flow of the liquid in the pump is varied, thus causing a variation in the number of turns of the hydromotor.

Abstract: A method and device are provided for generating energy from the motion of waves. Fluid is conveyed through a series of fluid pressurization units, each unit incrementally increasing the pressure of the fluid as the fluid passes under the force of differential pressure within that unit. The pressurized fluid from a preceding unit is outlet from that unit and input into the succeeding unit in series. Each unit includes a first member and an associated second member, the first member being immersed in or floating on the surface of a body of water, the first member rising and falling with the rise and fall of wave motion, and the second member being submerged and anchored. The fluid is pressurized as the result of the relative movement between the first and second members as the fluid passes through a unit. The pressurized fluid may then be used to drive turbines and electric generators or other energy conversion devices.

Abstract: An apparatus for generating rotary motion from rise and fall motion of waves includes an outer hollow sleeve, a float sealably attached across the upper end of the outer sleeve to define an interior cavity, prevent entry of water into the cavity and provide the outer sleeve with sufficient buoyancy to floatably follow up and down motion of waves, an inner hollow sleeve fitted telescopically within the outer sleeve, and an anchoring arrangement attached to the inner sleeve for restraining it from following up and down motion of waves with the outer sleeve and float. The outer sleeve will slidably move up and down relative to the inner sleeve as the outer sleeve and float floatably follow up and down motion of waves and correspondingly will draw a flow of water upwardly and force a flow of water downwardly through the inner sleeve. The apparatus also includes a single rotary motion-producing mechanism mounted within the inner sleeve intersecting and engaging the flow of water through the inner sleeve.

Abstract: A turbine device for harvesting wave energy has a hollow vertical tube having an open top and a closed bottom. The vertical tube is located in a body of water with its bottom located beneath the surface of the body of water and its top located above the surface of the water. A hollow turbine tube having an open top and an open bottom is sized and shaped with respect to the vertical tube such that a variable portion of the turbine tube including its open bottom is located in and is movable within the vertical tube. A float for raising and lowering the turbine tube with respect to the vertical tube in response to wave motion is attached near the top of the turbine tube. Raising and lowering of the float in response to wave motion raises and lowers the turbine tube in the vertical tube. A liquid is contained in and is displaceable between the vertical tube and the lower portion of the turbine tube.

Abstract: A pumping apparatus and method for pumping fluid using energy from rising and failing wave action in a body of fluid includes at least one float; a primary pump, such as a piston pump, connectable to the float for pumping fluid as the float rises with rising wave action; a secondary pump, such as a piston pump, connectable to the float and connectable to a fluid container extending above the pumping apparatus; and at least one anchor connectable to at least one of the primary pump and the secondary pump for anchoring the primary pump and the secondary pump relative to the float. The primary pump is moved from a reloaded position to a discharged position as the float rises the rising wave action in order to pump fluid. The secondary pump pumps fluid into the fluid container as the float rises with rising wave action.

Abstract: A phase control mechanism for a wave energy conversion apparatus is provided by means of a cam brake locking mechanism. Frictionally contacting locking cams retain a reciprocable drive shaft alternately in upper lower positions with minimal expenditure of electrical power. When the wave crests and troughs have reached predetermined levels, the cams are released allowing the drive shaft of the mechanism to translate to the opposite position.

Abstract: A power generating apparatus including a watertight sealed buoyant vessel of cylindrical form having an external stabilizer for directing the vessel into the current. Internally, the vessel is provided with a supporting structure on the axial centerline for rotatably supporting the axle or pivot shaft of a lever arm having a weight at the end thereof, the weight being supported on a circumferential rail assembly adjacent the upper end of the vessel. The weight is freely rotatable in either direction thorugh 360 degrees. The lower end of the shaft is coupled to a piston type hydraulic pump, which draws fluid from a reservoir, and pressurizes the fluid into a two stage accumulator, the controllable flow therefrom actuating a hydraulic motor coupled to an electrical generator, Fluid from the hydraulic motor then returns to the reservoir for further usage.

Abstract: Apparatus for recovering kinetic energy bound in the movement of water waves. The apparatus comprises a bouyant unit (2) and an energy-absorbing device connected to the bouyant unit. The energy-absorbing device comprises an immersed rigid piston (6) which is slideably arranged in a substantially vertical, elongate accelerating tube (1) which is intended to be immersed in the water and which is open at both ends thereof. The accelerating tube is connected to the buoyant unit (2) so as to accompany movement of the unit imparted thereto by the wave movement of the water. The working stroke (1) of the piston in the accelerating tube is limited by means of movement-limit means (8,9) incorporated in the accelerating tube and arranged to abrogate the force acting on the piston. In accordance with one suitable embodiment, these movement-limiting means comprise openings (9) arranged in the accelerating tube and co-acting with corresponding openings (8) in the piston (6).

Abstract: A wave-activated power generating apparatus in the form of a buoy includes a floatable main body provided with a vertically extending central pipe having its bottom open end opened into the water and its top open end located above the water surface when the main body floats in the water surface, an air turbine disposed at the top open end of the central pipe, a generator operatively coupled to the air turbine, and a plate-shaped guide plate fixedly attached to the main body as located opposite to and separated away from the bottom open end of the central pipe. The provision of the bottom guide plate allows to define a laterally opened circular opening between the guide plate and the bottom of the main body, through which the water moves into and out of the central pipe. This structure allows to use the present apparatus even in shallow waters.

Abstract: A float on a body of water is mechanically coupled to a piezoelectric material member for causing alternate straining and destraining of the member in response to the up and down movement of the float in response to passing waves, thereby causing the member to generate electricity. The output impedance of the float is matched to the input impedance of the member for increasing the energy transfer from the float to the member.

Abstract: A wave energy power generating process and apparatus is presented which takes advantage of the changing hydrodynamic pressure of ocean waves. The present invention comprises a fluid (preferably a gas) filled constant pressure reservoir positioned on land adjacent the ocean, i.e., the beach, which is connected by a hose or conduit to a submerged wave machine. The submerged wave machine consists of a water filled outer housing and a fluid filled inner flexible bladder. The housing includes at least one opening through a wall thereof communicating with the ocean. The opening includes at least one turbine therein which is connected to an electrical generator. When a wave crest flows above the wave machine, the water pressure over the housing and inner reservoir increases thereby collapsing the bladder. The collapse of the bladder will decrease the volume thereof and provide increased volume for ocean water.

Abstract: A wave powered engine including a float that rises and falls by wave action and which is guided by rails attached to the sea bed to restrict the motion of the float to vertical motion. The float having variable buoyancy and a depending skirt to increase the thrust of the float on upward and downward power strokes, and means on a framework fixed to the ocean bed that cooperates with means fixed to the movement of a shaft as a result of the reciprocating movement of the float.

Abstract: An off-shore platform is provided with a power grid comprised of a plurality of depending float members which are buoyant and weighted sufficiently to rise vertically in response to the buoyant energy of the wave action and to fall in response to gravity. A reciprocating piston member disposed in a cylinder is operatively connected to each float member to compress a fluid on the up stroke as the float member rises on a wave, and to extract fluid from a reservoir on the down stroke as the float member falls after the wave passes. The exhaust ports of the cylinders are commonly connected to accumulate fluid pressure in an exhaust reservoir sufficient to drive a turbine which powers an electric generator. The intake ports of the cylinders are commonly connected to an intake reservoir whereby the fluid extracted therefrom drives a second turbine and electric generator. The generating equipment disposed atop the platform sends the electricity to shore through subsea power lines.

Abstract: A relatively lightweight `motivator buoy` (15), constrained by guides (93) attached to a ballasted "floating platform" (1) of contrasting and static buoyancy characteristics, reciprocates vertically by wave action, lifting water via a piston (20) and cylinder (4) through automatic non-return valves (21,22) into a pressurized storage compartment (23) incorporating a compressible medium such as an airspace, then turning a water turbine (10) and electricity generator (11), or alternatively providing a hydraulic power source for other uses. Modules so constructed may be linked by an above-water framework to form continuous arrays.

Abstract: A buoy type wave energy extraction construction in which the natural frequency of vertical oscillation of the buoy is mechanically altered to at least partially conform to the wave frequency occurring during a period of operation, whereby the maximum amount of energy available from each successive wave front is extracted. The device includes a buoy, a vertically oscillating shaft supporting said buoy, a horizontally oriented motion output means driven by said vertical shaft, a braking means for arresting movement of the buoy at its uppermost limit of travel during any given oscillation, said braking means holding the buoy until the buoy may be dropped under gravity into a following wave trough.

Abstract: The hydraulic machine according to the invention comprises a reservoir intended to be filled with a fluid, a rotor freely rotatably supported about a horizontal axis within the reservoir, the rotor being so shaped that the center of buoyancy and resultant force or thrust to which the rotor is subject when immersed in the fluid is not located on the axis of rotation of the rotor, and means for causing a variation in the distance between the axis of rotation of the rotor and the free surface of the fluid within the reservoir, and/or for causing a variation in the volume of the fluid within the reservoir.

Abstract: At least one caisson which is part or all of a breakwater forms a water chamber therein whose closure is a pendulum having a natural period in rocking or oscillating the same as a period of stationary wave surges caused in the water chamber by rocking movement of the pendulum owing to wave force impinging against the pendulum. At least one double-acting piston and cylinder assembly is connected to the pendulum, so that when a piston of the assembly is reciprocatively moved by the pendulum, pressure difference between cylinder chambers on both sides of the piston of the assembly controls a change-over valve which in turn controls hydraulic pressure discharged from the cylinder chambers to be supplied to a plurality of hydraulic motors respectively having accumulators of a type wherein accumulated pressure and volume of the hydraulic liquid are proportional to each other, whereby driving a common generator alternately by the hydraulic motors.

Abstract: A collection device for energy from water with wave motion has working fluids, a number of pumping units and accumulators interconnected together, and valves to regulate the fluid flow. Each pumping unit has a chamber with an intake port connected to an accumulator, an exhaust port connected to another accumulator, and an outlet to the water. The working fluid in the chamber is in contact with the water, or is partitioned from the water by a flexible membrance or a piston. The pressure from the wave motion of the water pumps the working fluid from one accumulator to another with certain pressure or elevation increase. The working fluid gains suitable pressure or elevation increase through several stages of pumping units.

Abstract: A device and a method for extracting energy from waves on a liquid from the oscillations of a column 14 of liquid in a chamber 22. The oscillations are caused by an oscillatory excitation force `Fe` produced by the effect of the waves. The phase of the velocity `z` of the column 14 of liquid and the phase of the excitation force `Fe` are brought substantially into phase by arresting the motion of the column 14 of liquid, and holding the column 14 of liquid stationary until the column 14 of liquid can be released in phase with the excitation force `Fe`.

Abstract: A wave pump apparatus includes a number of upstanding cylinders connected together by a subframe. Each cylinder mounts a float on the outside of the cylinder connected to a piston within the cylinder. The upstanding cylinders are spaced approximately a distance of half of an average wave length from the main floats of a particular wave pattern such that as certain floats are moving upwardly, other floats are moving downwardly. Each cylinder is connected to a chamber at the bottom thereof with an inlet valve and an outlet valve, such that as the piston in the cylinder is moving upwardly, it will draw in water, and as the piston moves downwardly in the cylinder, it will pump the water.

Abstract: An improved rotational buoyant mass for wave energy conversion apparatus is disclosed. The rotational buoyant mass comprises at least one pair of helical volumes mounted for rotation about a common axis. The helical volumes are rotationally displaced with respect to one another about the common axis. The improved rotational buoyant mass may include multiple pairs of helices, the helices of respective pairs being displaced with respect to one another.

Abstract: The preferred embodiment of the invention is a wave powered generator including a "Hagen" float array comprising a plurality of floats each of which is coupled to a subsea support structure through a nonlinear power extraction means. The array may be moved below the surface to avoid adverse sea states. Individual array elements are sized and positioned on the support structure to permit fluid coupling of reflected wave energy between the floats.

Abstract: The invention is an improvement in the economical generation of energy by providing a system for utilizing the wave action of bodies of water, such as ocean waves. The system consists of a pair of floating units, each separately connected to a shaft member by a connecting arm, a ratchet-like gear affixed to the shaft member is indexed forward alternately or concurrently by spring loaded pawls affixed to each of the connecting arms from the floating units to the shaft members. The wave action alternately raising and lowering the floating units concurrently turns the ratchet-like gear through the action of the pawls. Thus, the turning shaft, properly geared can turn an electric generator, air compressor, or other device of generating another form of energy which can be used or stored for future use.

Abstract: A wave activated power generation system of the float type comprising at least one piston-cylinder device having an anchored cylinder and a piston slidable in the cylinder and cooperating with the cylinder to form a pumping chamber above the piston and a low pressure chamber below the piston. The cylinder has an intake port and an exhaust port both formed at an upper portion thereof to communicate with the pumping chamber and each provided with a check valve. A float is connected through a cable to the piston of the piston-cylinder device. A pair of fluid storages are connected to the intake port and the exhaust port of the pumping chamber, respectively. A waterwheel generator is driven by the fluid flowing from one of the fluid storages to another.

Abstract: Wave energy apparatus comprises a hollow buoy (2) for floating in water. The buoy has a turbine (5) which rotates in response to air flow into and out of the buoy (2) through a nozzle (4). The turbine (5) is designed to rotate in the same direction regardless of the axial direction of air flow. The air flow is caused by the change of level of water (W) within the buoy in response to wave motion.To enable rocking motion to be accommodated as well as vertical motion, the interior of the buoy is divided into a plurality of conduits (9), by means of partitions (6), the conduits directing air to different portions of the turbine (5). The conduits (9) preferably have lateral openings (10) and may be defined in part by upwardly inclined portions (11) of an inertial body (8).In an alternative embodiment the buoy has a closed bottom and liquid in the buoy is acted on by a centrally disposed air spring.