WO2010077158A4 - Wave energy converter and the 3-phase mechanic method - Google Patents
Wave energy converter and the 3-phase mechanic method Download PDFInfo
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- WO2010077158A4 WO2010077158A4 PCT/PT2008/000058 PT2008000058W WO2010077158A4 WO 2010077158 A4 WO2010077158 A4 WO 2010077158A4 PT 2008000058 W PT2008000058 W PT 2008000058W WO 2010077158 A4 WO2010077158 A4 WO 2010077158A4
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
- F03B13/16—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"
- F03B13/20—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" wherein both members, i.e. wom and rem are movable relative to the sea bed or shore
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2250/00—Geometry
- F05B2250/20—Geometry three-dimensional
- F05B2250/23—Geometry three-dimensional prismatic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/40—Transmission of power
- F05B2260/406—Transmission of power through hydraulic systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
This invention describes a Wave Energy Converter (WEC), which is the mechanical equivalent to a fully balanced 3-phase electrical generator, aimed to produce continuous power. By virtue of its 3-phase mechanic architecture, the WEC reacts force against himself and doesn't need any mooring system to react force against. The WEC is characterised by three equal legs (12,13,14), which are the three individual mechanical phases, all of them connected to a central articulation (1). The angle between each mechanical phase/leg (12,13,14) centre of mass (2,3,4) is exactly 120° degrees. Each leg/phase (12,13,14) must have the same inertia moment and is characterised by an equal large rigid mass (22,23,24) connected to each leg/phase (12,13,14). Only one of the three masses (22,23,24) interferes with Ocean waves, being the other two deeply submerged. Each leg/phase is connected by one of three equal springs (5,6,7) and one of three equal power-take-off dampers (8,9,10).
Claims
AMENDED CLAIMS
1. An offshore deepwater Wave Energy Converter (WEC) working submerged, characterised in that it reacts force against itself and, therefore, requires no mooring to the seabed, nor requires any kind of superstructure (like a massive platform) to react force against.
The WEC comprises a central articulation (1). Every move that any reactive element (22,23,24) makes will be done via the said central articulation (1). The WEC further comprises three rigid legs (12,13,14), three spring (5,6,7) systems, three reactive elements (22,23,24) and three power-take-off
(8,9,10) systems. The three power-take-off (8,9,10) systems are power conversion systems aimed to convert wave energy into a more useful form of energy. The power-take-off
(8,9,10) systems could be, for instance, hydraulic rams, or linear electrical generators, or any other kind of known suitable power-take-off. The three reactive elements
(22,23,24) are large masses (22,23,24) aimed to either capture wave energy and/or to react force against. The three rigid legs (12,13,14) are aimed to make connections between all said elements. Finally, the three spring (5,6,7) systems are the motor of the working mechanism that drives the WEC into resonance and allows it to maximise wave energy capture. The three spring (5,6,7) systems also give the WEC its shape and are fundamental to keep a 120 degrees equilibrium angle between the three rigid legs (12,13,14) as claimed below.
The WEC is also characterised by the fact that, when not actuated by waves, the axis of each rigid leg (12,13,14) makes an exact angle of 120 degrees between any other rigid leg (12,13,14) axis, being the central articulation (1) the vertex of the said angle. Therefore, all three rigid legs
(12,13,14) axis make an angle of 120 degrees to each other, within a 360 degrees circle, and define three symmetry axis at 120 degrees from each other, crossing over the central articulation (1).
The WEC is also characterised by the fundamental requirement that, when not actuated by waves, the center of mass
(11) of the entire WEC must be positioned exactly over the axis of the central articulation (1) . This is achieved mostly by the above said 120 degrees symmetry and fine-tuned by means of balancing the (reactive) mass of the reactive elements (22,23,24).
Each rigid leg (12,13,14) have one extremity firmly connected to the central articulation (1), by means of a bearing or any kind of elastic element that allows a perfect rotation around that point (1,11), while the other extremity of the same leg structure (19,20,21) is firmly connected to one of the three reactive elements (22,23,24) described as large masses (22,23,24).
Only one of the three reactive elements (22,23,24) interferes with Ocean waves and captures wave energy. That reactive element (22) that captures wave energy is a buoy (22) that floats and, while being mostly submerged, the top of said buoy (22) appears above water surface. The other two reactive elements (23,24) are slightly heavier then the volume of water they displace (they will sink) and are out of reach of wave energy. In order to the said two other reactive elements (23,24) be out of reach of wave energy they got to be both placed at a depth larger then about 1/8 of the maximum wavelength (about 30 to 40 meters). Or else, one reactive element (23,24) deeply submerged and the other (23,24) positioned downstream the first reactive element (22) that captures wave energy, when and only when the energy capturing element (22) is able to capture almost all wave energy content, leaving an almost flat sea (with no energy) after the wave had passed it.
Each of the three spring (5,6,7) systems are to be articulate connected on two consecutive rigid legs (12,13,14) and each leg (12,13,14) got to be connected by the extremity of two different spring (5,6,7) systems. This is equivalent to say that the entire spring (5,6,7) system assumes a triangular shape, being each vertex positioned over the axis of one leg (12,13,14) . The said vertex is the point where the imaginary axis line of the individual spring (5,6,7) systems cross. This makes the entire spring system to assume a delta like configuration. The said three spring (5,6,7) systems are to be pre-tensioned, either all of them loaded at traction or compression, it doesn't matter as long they are all pre- tensioned the same way. Likewise, each of the three power- take-off (8,9,10) systems are to be articulate connected on two consecutive legs (12,13,14) and each leg (12,13,14) got to be connected by the extremity of two different power-take- off (8,9,10) systems, exactly like the three spring (5,6,7) systems connect.
The WEC is further characterised by that relative angular displacement between any two consecutive legs (12,13,14) must actuate simultaneously one spring (5,6,7) system and also one power-take-off (8,9,10) system. Therefore, between any two consecutive legs (12,13,14) there's one spring (5,6,7) system and one power-take-off (8,9,10) system.
2. A Wave Energy Converter, according to claim 1, that in order to achieve some rigidity between the three legs (12,13,14) and, thereby, to assume a 120 degree angle between any two consecutive legs (12,13,14), is characterised in that each one of the three spring (5,6,7) systems has one extremity connected to a point on a secondary central articulation (31,32,33), that receives motion from the relative motion of two consecutive legs (12,13,14), and the
other extremity connected to the central articulation (1). Relative motion from two consecutive legs (12,13,14) must be obtained by means of fully symmetric articulated rods (28,29,30), via fully symmetric articulations (34,35,36) on each leg (12,13,14). Likewise, the power-take-off (8,9,10) system could connect exactly the same. This is equivalent to say that the entire spring system, or the entire power-take- off system, each could assume a star like shape, instead of the previous delta-triangular shape described claim 1.
3. A Wave Energy Converter, according to claim 1 and 2, characterised in that all of the three reactive elements (22,23,24), described as rigid masses (22,23,24), can change the actual mass value, by means of filling in or expelling out some of the surrounding sea water, at variable volume.
9. A Wave Energy Converter, according to claim 1 and 2, characterised in that the single reactive element (22) that interferes with Ocean waves is positioned partially above the sea level (the still water surface) and mostly submerged (underwater). Therefore, such reactive element (22) works as a buoy (22) that carries some springiness in the vertical direction, whenever a change of its vertical position occurs.
10. A Wave Energy Converter, according to claim 1, 2 and 9, characterised in that the entire WEC mass and the springiness of the single reactive element (22), that interferes with Ocean waves, is in resonance with waves frequency.
12. A Wave Energy Converter according to claim 1, 2, 9 and 10, characterised in that it defines an internal oscillatory mechanic system, bearing three internal oscillatory angular motions, that is in resonance with Ocean waves frequency.
13. An offshore deepwater Wave Energy Converter (WEC) according to claim 1, 2 and 9 to 12, aimed to be independent of waves directionality, which we called a spherical 3-phase mechanic and whose geometry is that of a regular tetrapod
(four legs), working submerged, characterised in that it reacts force against itself and, therefore, requires no mooring to the seabed, nor requires any kind of superstructure (like a massive platform) to react force against .
The WEC comprises a spherical central articulation (1). Every move that any reactive element (22,23,24,38) makes will be done via the said spherical central articulation (1) . The WEC further comprises four rigid legs (19,20,21,39), six spring (5,6,7,40,41,42) systems, four reactive elements
(22,23,24,38) and six power-take-off systems placed side-by- side every spring (5,6,7,40,41,42) system. The six power-
take-off systems are power conversion systems aimed to convert wave energy into a more useful form of energy. The power-take-off systems could be, for instance, hydraulic rams, or linear electrical generators, or any other kind of known suitable power-take-off. The four reactive elements
(22.23.24.38) are large masses (22,23,24,38) aimed to either capture wave energy and/or to react force against. The four rigid legs (19,20,21,39) are aimed to make connections between all said elements. Finally, the six spring (5,6,7,40, 41,42) systems are the motor of the working mechanism that drives the WEC into resonance and allows it to maximise wave energy capture. The six spring (5,6,7,40,41,42) systems also give the WEC its shape and are fundamental to keep a 120 degrees equilibrium angle between the four rigid legs
(19.20.21.39) as claimed below.
The WEC is also characterised by the fact that, when not actuated by waves, the axis of each rigid leg (19,20,21,39) makes an exact angle of 120 degrees between any other rigid leg (19,20,21,39) axis, being the spherical central articulation (1) the vertex of the said angle. Therefore, all four rigid legs (19,20,21,39) axis make an angle of 120 degrees to each other, within a spherical contour, and define four symmetry axis at 120 degrees from each other, crossing over the spherical central articulation (1).
The WEC is also characterised by the fundamental requirement that, when not actuated by waves, the center of mass (11) of the entire WEC must be positioned exactly over the axis of the spherical central articulation (1) . This is achieved mostly by the above said 120 degrees symmetry and fine-tuned by means of balancing the (reactive) mass of the reactive elements (22,23,24,38).
Each rigid leg (19,20,21,39) have one extremity firmly connected to the spherical central articulation (1), by means of a spherical bearing or any kind of elastic element that allows spherical rotation around that point (1,11), while the other extremity of the same leg structure (19,20,21,39) is firmly connected to one of the four reactive elements
(22.23.24.38) described as large masses (22,23,24,38).
The WEC geometry is that of a regular tetrapod (four legs), similar to a breakwater, comprising a spherical central articulation (1), where all the individual four legs
(19.20.21.39) connect. In geometry, a regular tetrapod is defined as a four leg object having four projections radiating from one central node (1), with each forming an angle of 120° degrees with any other, so that no matter how the object is placed on a relatively flat surface, three of the projections will form a supporting tripod and the fourth will point directly upward.
Only one of the four reactive elements (22,23,24,38) interferes with Ocean waves and captures wave energy. That
reactive element (22) that captures wave energy is a buoy (22) that floats and, while being mostly submerged, the top of said buoy (22) appears above water surface. The other three reactive elements (23,24,38) are slightly heavier then the volume of water they displace (they will sink) and are out of reach of wave energy. In order to the said three other reactive elements (23,24,38) be out of reach of wave energy they got to be placed at a depth larger then about 1/8 of the maximum wavelength (about 30 to 40 meters) . Or else, those reactive elements (23,24,38) positioned downstream the first reactive element (22) that captures wave energy, when and only when the energy capturing element (22) is able to capture almost all wave energy content, leaving an almost flat sea (with no energy) after the wave had passed it.
Each of the six spring (5,6,7,40,41,42) systems are to be articulate connected on two consecutive rigid legs (19,20,21,39) and each leg (19,20,21,39) got to be connected by the extremity of three different spring (5,6,7,40,41,42) systems. The said six spring (5,6,7,40,41,42) systems are to be pre-tensioned, either all of them loaded at traction or compression, it doesn't matter as long they are all pre- tensioned the same way. Likewise, each of the six power-take- off systems are to be articulate connected on two consecutive legs (19,20,21,39) and each leg (19,20,21,39) got to be connected by the extremity of three different power-take-off systems, exactly like the six spring (5,6,7,40,41,42) systems connect .
The WEC is further characterised by that relative angular displacement between any two consecutive legs (19,20,21,39) must actuate simultaneously one spring (5,6,7,40,41,42) system and also one power-take-off system. Therefore, between any two consecutive legs (19,20,21,39) there's one spring (5,6,7,40,41,42) system and one power-take-off system.
14. A Wave Energy Converter according to claim 13, characterised in that each spring (5,6,7,40,41,42) system and each power-take-off system again connects to two different legs, but now the vertical leg (19), which carries the reactive element (22) that interferes with Ocean waves, is connected by three different spring (5,7,42) systems and three different power-take-off systems, while the three bottom legs
(20,21,39) are only connected by two different spring (5,6,7,40,41,42) systems and/or two different power-take-off systems, because there's a bottom star arrangement of three spring (6,40,41) systems and/or three power-take-off systems at 120° degrees angle to each other.
15. A Wave Energy Converter according to claim 1, 2, 9, 10 and 12, aimed to be the mechanical equivalent of a 3-phase electrical generator and characterised by the fact that, when
sinusoidal wave load conditions are meet, the WEC performs 3- phase mechanic motion, meaning motion defined by three distinct angular displacements between three reactive elements (22,23,24). Those said three distinct motions are sinusoids de-phased 120 degrees one from each other, per wave period, being the sum of those three sinusoids zero (exactly like 3-phase current sinusoids and/or 3-phase voltage sinusoids generated by all electrical generators that power the entire World today) . When the sum of the three said sinusoids is zero the WEC produces constant mechanical power at constant value per wave period. Therefore, no intermediate energy storage system is required (placed after the power- take-off) .
Each mechanical phase comprises one leg (12,13,14), one spring (5,6,7) system, one reactive element (22,23,24) and one power-take-off (8,9,10) system. One mechanical phase is an angular displacement defined either, as the relative angular displacement between any two of the three legs (12,13,14), or defined as the angular displacement of any individual rigid leg (12,13,14), both relative to the central articulation (1). The difference between those two said angular displacements is that they are de-phased 60 degrees in time.
The spring is aimed to drive the oscillation of mechanical phase into resonance and the power-take-off to take the power out from that mechanical phase. Each mechanical phase is drive by the kinetic energy defined by the relative motion between two consecutive reactive mass elements (22,23,24) . The spring is aimed to store and deliver energy and the power-take-off to take power out and convert it into a more useful form. The wave power (force times velocity) is captured only and exclusively via the buoy (22), which is one of the three said reactive elements (22,23,24). Then the wave force is transmitted to the other two reactive elements (23,24) via the central articulation (1), at a precise angle of 120 degrees, to create the 3-phase mechanic system and produce continuous power, which is the aim of this invention.
Finally, the WEC is further characterised in that the three mechanical phases, while distinct, are dependent from each other. Meaning that whenever one mechanical phase has angular displacement that displacement automatically causes the actuation (angular displacement) of other mechanical phases, because mechanical phases close a circle.
The required technical features are those of claims 1, 2, 9, 10 and 12, and that all reactive elements (22,23,24) have the same reactive mass, all spring (5,6,7) systems have the same springiness and all power-take-off (8,9,10) have the same damping.
16. A Wave Energy Converter according to claim 13 and 14, aimed to be the mechanical equivalent of a 3-phase electrical generator and characterised by the fact that, when sinusoidal wave load conditions are meet, the WEC performs 3-phase mechanic motion, meaning motion defined by three distinct angular displacements between four reactive elements (22,23,24,38) .
The WEC is a 3-phase mechanic as defined in claim 15, therefore has three mechanical phases, all according to claim 1, but those three mechanical phases got to be defined differently. First we need to define an imaginary plane orthogonal to waves direction of propagation and passing through the central spherical articulation (1). The first individual mechanical phase will be the sum of legs (19,20, 21,39) relative displacements computed one side of the above- said vertical plane. The second individual mechanical phase will be the sum of legs (19,20,21,39) relative displacements computed the other side of the same above-said vertical plane. Finally, the third individual mechanical phase will be the sum of three legs (20,21,39) relative displacements below the horizontal plane that passes through the spherical central articulation (1).
The WEC is further characterised in that the three mechanical phases, while distinct, are dependent from each other. Meaning that whenever one mechanical phase has angular displacement that displacement automatically causes the actuation (angular displacement) of other mechanical phases, because mechanical phases close a circle.
The required technical features are those of claims 13 and that all reactive elements (22,23,24,38) have the same reactive mass, all spring (5,6,7,40,41,42) systems have the same springiness and all power-take-off have the same damping .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/PT2008/000058 WO2010077158A1 (en) | 2008-12-29 | 2008-12-29 | Wave energy converter and the 3-phase mechanic method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/PT2008/000058 WO2010077158A1 (en) | 2008-12-29 | 2008-12-29 | Wave energy converter and the 3-phase mechanic method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2010077158A1 WO2010077158A1 (en) | 2010-07-08 |
| WO2010077158A4 true WO2010077158A4 (en) | 2010-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/PT2008/000058 WO2010077158A1 (en) | 2008-12-29 | 2008-12-29 | Wave energy converter and the 3-phase mechanic method |
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| WO (1) | WO2010077158A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BRPI1004764B1 (en) * | 2010-11-04 | 2020-07-28 | Marcelo Regattieri Sampaio | wave power converter |
| DE102011102676B4 (en) * | 2011-05-28 | 2013-12-05 | Goran Kaurin | Swell driven pump |
| RU2633328C2 (en) * | 2012-06-05 | 2017-10-11 | Дднт Консалтентс Острелиа Пти Лтд | Wave energy generator and method of energy generation |
| EP2781732B1 (en) * | 2013-03-20 | 2016-04-06 | Anderberg Development AB | Energy converting system |
| CN105888946B (en) * | 2014-09-24 | 2018-08-28 | 嘉兴市迅程信息技术有限公司 | A kind of eight oscillator biserial spring formula ocean wave generator of four wobble plate |
| CN105888945B (en) * | 2014-09-24 | 2019-05-03 | 北京知投家知识产权运营有限公司 | A kind of turtle shape three swing plate double oscillator type wave generator |
| CN105443307A (en) * | 2014-09-24 | 2016-03-30 | 无锡津天阳激光电子有限公司 | Sea-turtle-shaped five-swing-plate four-vibrator double-row-spring type sea wave electric generator |
| CN105888937B (en) * | 2014-09-24 | 2019-01-04 | 台州大浪泵业股份有限公司 | A kind of four oscillator biserial spring formula ocean wave generator of six wobble plate |
| CN105888938B (en) * | 2014-09-24 | 2018-12-04 | 台州大浪泵业股份有限公司 | A kind of four wobble plate of green turtle shape, four oscillator biserial spring formula ocean wave generator |
| CN105888948B (en) * | 2014-09-24 | 2019-09-27 | 高邮市驿都小微企业服务管理有限公司 | A kind of eight oscillator biserial spring formula ocean wave generator of six wobble plate |
| CN105626360B (en) * | 2014-09-24 | 2018-09-04 | 骆云蓉 | A kind of imitation sea turtles shape eight swing plate fifteen oscillator type wave generator |
| CN107613211B (en) * | 2017-10-19 | 2023-11-10 | 广州娉婷视觉科技信息服务有限公司 | Underwater film and television damper |
| CN110645138B (en) * | 2019-09-24 | 2020-11-13 | 六安永贞匠道机电科技有限公司 | Method for generating power by using ocean wave energy and wind energy |
| CN111682549B (en) * | 2020-05-28 | 2022-04-22 | 东南大学 | Finite set model prediction control strategy of three-phase power spring |
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| US1061091A (en) * | 1911-12-12 | 1913-05-06 | James C Lewis | Wave-motor. |
| GB203860A (en) * | 1922-08-01 | 1923-09-20 | Edward Owen Baker | Improvements in utilizing the power of ocean waves |
| US3697764A (en) * | 1971-03-29 | 1972-10-10 | S & S Research & Dev Corp | Method and apparatus for generating electricity |
| EP0001730A1 (en) * | 1977-10-14 | 1979-05-02 | Gabriel Ferone | Plant for utilizing oceanic energy |
| GB2026621B (en) * | 1978-03-02 | 1982-08-25 | Sea Energy Associates Ltd | Wave power device |
| IT1139379B (en) * | 1981-08-18 | 1986-09-24 | Tecnomare Spa | SYSTEM FOR THE RECOVERY OF THE ENERGY OF THE WAVE MOTOR AND ITS TRANSFORMATION INTO USEFUL ENERGY |
| US4792290A (en) * | 1987-04-29 | 1988-12-20 | Berg John L | Wave actuated pump apparatus |
| NO942702D0 (en) * | 1994-07-19 | 1994-07-19 | Ottersen Hans Olav | Wave motor with pool |
| US6647716B2 (en) * | 2000-06-08 | 2003-11-18 | Secil Boyd | Ocean wave power generator (a “modular power-producing network”) |
| FI20055155A (en) * | 2005-04-07 | 2006-10-08 | Finn Escone Oy | Method and apparatus for collecting wave energy |
| US7538445B2 (en) * | 2006-05-05 | 2009-05-26 | Sri International | Wave powered generation |
| NZ577601A (en) * | 2006-11-28 | 2012-04-27 | 40South Energy Ltd | An ocean power generator using the relitive motion of to nuetraly bouyant parts to generate electricity |
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2008
- 2008-12-29 WO PCT/PT2008/000058 patent/WO2010077158A1/en unknown
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| Publication number | Publication date |
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| WO2010077158A1 (en) | 2010-07-08 |
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