GB2451879A - Wave energy converter with hydraulically compressed pump chamber - Google Patents
Wave energy converter with hydraulically compressed pump chamber Download PDFInfo
- Publication number
- GB2451879A GB2451879A GB0715961A GB0715961A GB2451879A GB 2451879 A GB2451879 A GB 2451879A GB 0715961 A GB0715961 A GB 0715961A GB 0715961 A GB0715961 A GB 0715961A GB 2451879 A GB2451879 A GB 2451879A
- Authority
- GB
- United Kingdom
- Prior art keywords
- container
- wave energy
- energy converter
- converter according
- receptacle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000006835 compression Effects 0.000 claims description 17
- 238000007906 compression Methods 0.000 claims description 17
- 239000012530 fluid Substances 0.000 claims description 17
- 230000037361 pathway Effects 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 19
- 239000007788 liquid Substances 0.000 description 16
- 239000000463 material Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 240000004752 Laburnum anagyroides Species 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003653 coastal water Substances 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- 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
- F03B13/22—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 flow of water resulting from wave movements to drive a motor or turbine
-
- 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"
- F03B13/18—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" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore
- F03B13/188—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" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is flexible or deformable
-
- 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
-
- 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
Landscapes
- 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
A wave energy converter 1 comprises a flexible container 2 attached to a buoyant float 3. There is a resistance or drag plate 6 which is relatively stationary in the water. Hydraulic rams 17 are connected between the float 3 and the resistance plate 6, and coupled to lateral hydraulic rams 15, which compress the chamber 2 when the float 3 and resistance plate 6 move apart. The float 3 includes a buoyant chamber 13 and a header tank 4 which receives water pumped from the compressible chamber 2. Water drains from the header tank 4 via channel 7 and drives a turbine 8.
Description
1 2451879 Wave Encry Converter The present invention relates to a wave energy converter.
The depletion of the earth's natural resources, coupled with the need to cut carbon dioxide emissions, has led to a great deal of research into renewable energy sources, such as wind, wave and solar energy. Ocean waves represent a considerable renewable energy resource.
Waves are generated by the wind as it blows across the surface of oceans and they can travel great distances without significant energy loss. The majority of the energy of a wave is contained near the surface of the water.
There have been many attempts to harness the vast amounts of energy provided by waves and many countries have set targets for renewable energy resources. However, the niain problem presented by harnessing wave power is one of economics. Systenis for converting wave power into usable forms of energy must be able to do so at competitive prices. However, existing wave energy converters tend to be expensive. Furthermore, the systems need to be able to withstand the extreme conditions presented in coastal waters.
It is the object of the present invention to overcome some of the problems of the prior art systems. or at least to provide an alternative to them. The solution provides a passive system for converting energy froni waves.
According to the present invention there is provided a wave energy converter as set out in the accompanying claims.
In use of the wave energy converter buoyancy means will float on the surface of a body of water, which may conveniently be a sea or ocean, and the container will extend downwards below the surface of the water. The buoyancy means will stay at or proximate the surface of the water and will rise and fall according to the motion of the waves. When a wave causes the buoyancy means to rise, the resistance means is prevented by drag from rising at the sanie rate. This causes separation of the buoyancy means and resistance means which in turn actuates the means for compressing the container, so that the container is compressed and a volume of liquid located within the container is forced into the receptacle. The water then exits the receptacle through the outlet channel, rotating the turbine as it does so. The exit through the channel is driven by gravity / hydrostatic pressure. The turbinc is preferably configured to convert the energy of the waves into electrical energy.
As the wave passes the buoyancy means will bcgin to return to its original position and the separation between it and the resistance means will reduce.
The resistance means niay comprise a plate member disposed perpendicular to the longitudinal axis of the container. The size of the plate member may be chosen to suit the requirements of the energy converter. Typically, the plate may be a circular plate extending radially from a central point of the container. The plate member is preferably weighted to provide additional resistance.
In an alternative embodiment, the resistance means comprises an anchor. The anchor may conveniently be attached to any suitable structure, such as, but not limited to, the sea-bed.
The resistance means may alternatively be weighted.
In any event, it is preferred that the wave energy converter is provided with some form of mooring means to ensure that it remains in a specified location. It is well understood that certain areas have particularly high wave energy and in this manner the wave energy converter may be positioned for best results. Furthermore, it will be necessary to ensure that the wave energy converter does not interfere with other activities, in particular, fishing.
The wave energy converter is preferably configured to convert wave energy iiito electrical energy. In particular, the wave energy converter is preferably configured to convert horizontally propagating wave energy into rotational torque. The rotation of the turbine is used to generate electrical energy. The wave energy converter is preferably connected to an electricity grid. The wave energy converter niay conveniently be moored in the region of an underwater hub designed to connect to the electricity grid.
The compression means may conveniently comprise a hydraulic system including hydraulic rams arranged to compress the container in response to separation of the resistance means and buoyancy means. In such a system, at least one longitudinal hydraulic ram may be connected between the resistance means and the buoyancy means. such that during separation the rams also extend. This longitudinal ram is hydraulically connected to at least one CoflipreSSioll ram, so that extension of the longitudinal ram causes the compression ram to extend and thus compress the container, which in turn causes liquid in the container to flow up into the receptacle.
After the crest of the wave has passed, the buoyancy means will lower relative to the resistance means. At this point the container will begin to expand and water will be drawn into the container from the outside water mass, through the inlet valve. The longitudinal ram is caused to extend, which in turn retracts the compression ram, drawing liquid up into the container from the sunounding region.
For a better understanding of the present invention reference will now be made to the accompanying drawing showing, solely by way of example, an embodiment of the invention and, in which: Figure I shows a sectional view of a wave energy converter.
Fig. I shows a wave energy converter I comprising a substantially cylindrical container 2 for containing a volume of fluid and buoyancy means 3. Buoyancy means 3 contains within it a receptacle or header tank 4, which may ftr example be supported by struts or braces (not shown) connected to an interior wall of the buoyancy means 3. The container 2 has a first end 2a, which is in fluid communication with the receptacle 4 via fluid a pathway 5, which runs between the receptacle 4 and an internal wall of buoyancy means 3. Resistance means, in the form of a plate member 6, is disposed at the base of the converter, proximate a second end 2b of the container 2. A fluid outlet channel 7 allows liquid to pass from the receptacle 4 to the exterior of the converter I. A turbine 8 is provided within and proximate the lower end of the outlet channel 7. The turbine 8 is arranged for driving an electrical generator 9 disposed within the buoyancy means 3. The turbine 8 only needs to operate when it is rotated in a single direction, that caused by the action of downward flowing liquid through the outlet channel 7. The turbine 8 is set up to convert mechanical energy into electrical energy. The turbine 8 may conveniently be connected to an electricity grid, which may be used to supplement energy generated by other means, such a from the burning of fossil fuels, or it may be the sole source of energy.
The container 2 is an elongate structure of substantially leiiticular or "pillow-shaped" cross-section, approximately 20m in length and with a major diameter of approximately 9ni and a minor diameter of approximately 6m. The volume of the container is approximately 660m.
The container 2 is made of a flexible, elastic plastics material, for example a composite plastics bonded material, which is capable of elongating along its longitudinal axis. A flap inlet valve 10 is provided at the end 2b to al]ow fluid to enter the container 2 from the surrounding body of water but prevent its exit from the container 2. Fluid communication between the top end 2a of container 2 and the pathway Sis regulated by a spring valve II depending from the buoyancy means. This valve 11 acts to permit liquid to flow from IS container 2 into pathway 5 but prevent its return. A further flap valve 12 is provided within plate member 6 proximate cud 2b of container 2, arranged to enable liquid to flow upwardly through plate member 6, but prevent downward flow. This valve aids intake of water into the container 2 during a wave trough phase as described below, but maintains maximum water resistance of the plate member 6 during a swell phase.
Buoyancy means 3 is a buoyant, spheroid structure which is designed such that, in use of the wave energy converter 1, it floats on the surface of a body of water with the container 2 depending downwards below the surface of the water. The buoyancy means 3 is made of a lightweight, durable material such as aluminium and has a diameter of approximately 3Oni.
To aid buoyancy, a chamber 13 provided in the region underneath the receptacle 4 may be pressurised, filled with air or other buoyant material.
The buoyancy means structure includes a support franie 14 attached to its underside which extends parallel to, and on opposite sides of the container 2, and is attached to the container 2 at its lower end. The support frame carries hydraulic compression rams IS arranged so as to be extendable in the horizontal direction. The compression ram outputs are connected to a compression plate 16. As shown, five compression rams 15 are positioned on each side of container 2, with each group of five rams connected to a respective compression plate 1 6.
The support frame 14 also supports at least OflC longitudinal hydraulic ram I 7, in this case two such rams are shown. The distal ends of the longitudinal rams carry the resistance plate member 6. Hydraulic chambers within the longitudinal rams 17 are linked to those of the compression rams 15 to form a closed-loop hydraulic system, such that extension of the longitudinal rams 17 causes extension of the compression rams 15.
The operation of the wave energy converter I will now be described by way of an illustrative example. The wave energy converter I is positioned in a body of water, such as a sea, which is known to experience waves of a sufficient magnitude. The buoyancy means 3 floats on the surface of the water with the container 2 depending downwards below the surface of the water.
The buoyancy means 3 will stay on the surface of the water and will rise and fall according to the motion of the waves. When a wave swell causes the buoyancy means 3 to rise, the plate member 6 acts as a resistance means by virtue of its high drag coefficient. The motion of plate member 6 will therefore be much less than that of buoyancy means 3. This causes the longitudinal hydraulic rams 1 7 to elongate to compensate for the motion difference. The extension of longitudinal rams 17 causes corresponding extension of compression rams 15.
This extension causes the compression plates 16 to be brought together, squeezing the container 2. Liquid contained with container 2 is therefore forced up through valve I I into pathway 5. Inlet valve 10 prevents liquid exit through the bottom of container 2 The liquid is forced through pathway 15 and flows into receptacle 4, acting as a header tank. Liquid within receptacle 4 drains away through outlet channel 7, causing rotation of turbine 8 as it does so. This rotation is converted into electrical energy by generator 9. The rotation of the turbine 8 is aided by the head built up in the liquid by virtue of the header tank receptacle 4, ensuring a strong tiow through the outlet channel 7.
As the wave asses, the buoyancy means 3 begins to lower due to the trough, and the converter I experiences a net downward thrust due to gravity. Again, the movement of the buoyancy means 3 is greater than that of the resistance plate member 6. This relative movement retracts longitudinal rams 17, which in turn retract compression rams 15. As compression plates 1 6 move apart, a region of low pressure is created in container 2, which causes liquid to be drawn into the container 2. This effect is aided by the elasticity of the container 2 urging it to return to its original position. Liquid is drawn into container 2 through inlet valve 10 at its base, with valve II blocking inward flow at the to1) end. Valve 12 in plate member 6 also permits liquid from the surrounding region to be drawn toward and into container 2.
The operation of the wave energy converter 2 is passive and it will simply move with the motion of the waves and generate energy accordingly.
It is envisaged that the wave energy converter I may form part of a larger system comprising a plurality of similar wave energy converters. The wave energy converters I may conveniently be grouped together, for example secured together in a single line or in a bunch.
The wave energy converters I do not require to be spaced apart as they are able to operate passively as they rise and fall on the waves. The wave energy converters I may conveniently be provided with mooring means (not shown) to prevent them from being carried away by the waves.
Initial studies show that a system with a cylindrical container of about 660m and a receptacle of about 525m1 has a generating potential in excess of 1MW, with reasonable assumptions suggesting an average output of around 2.5MW. The output will of course be dependent on the prevalent sea-state, although the converter will be usefully operable throughout a range of wave-heights, for example from about 0.5ni to about 6m. In addition, the converter is robust enough to withstand harsh conditions such as storms.
The above-descnbed embodiment is exemplary only, and various alternatives or modifications within the scope of the claims will be apparent to the skilled person. For example, form sonic deployments, the resistance means may be anchored, e.g. to the sea-bed.
The resistance nieans may also be weighted to increase the drag effect. Compression means other than a hydraulic system may be employed, for example a mechanical linkage may be used. The buoyancy means may take a variety of forms. The top of the converter may be open, so that liquid incident thereon, e.g. rain or spray would land in the receptacle and increase the output flow. g
Claims (14)
- Claims I. A wave energy converter comprising a container for containing a volume of fluid, the container having first and second ends, buoyancy means disposed proximate the first end of the container, a fluid receptacle arranged such that fluid may flow from the container to the receptacle, a fluid outlet channel connected to the receptacle, a turbine disposed in the outlet channel, resistance means disposed proximate the second end of the container, and means for compressing the container in response to separation of the buoyancy means and resistance means.
- 2. A wave energy converter according to Claim 1, comprising an outlet valve located between the container and the receptacle, arranged to permit fluid flow froni the container to the receptacle but prevent fluid flow from the receptacle into the container.
- 3. A wave energy converter according to either of Claims 1 and 2, comprising an inlet valve in fluid communication with the container, arranged to permit fluid flow into the container, but prevent fluid flow from the container.
- 4. A wave energy converter according to any preceding claim, wherein the means fhr compressing the container comprises a hydraulic system connected between the resistance means and buoyancy means.
- 5. A wave energy converter according to Claim 4, wherein the hydraulic system comprises a plurality of hydraulic rams.
- 6. A wave energy converter according to Claim 5, wherein the hydraulic system comprises a compression plate linked to a hydraulic rani output to effect compression of the container.
- 7. A wave energy converter according to any preceding claim, wherein the receptacle comprises a header tank.
- 8. A wave energy converter according to claim 7, wherein the tank is located within the buoyancy means.
- 9. A wave energy converter according to claim 8, wherein a fluid pathway is located within the buoyaiicy means in fluid communication with the container and the tank.
- 10. A wave energy converter according to any preceding claim, wherein the container is an elongate, cylindrical structure.
- II. A wave energy converter according to any preceding claim, wherein the resistance means comprises a plate member disposed perpendicular to the longitudinal axis of the container.
- 12. A wave energy converter according to claim 11, wherein the plate member is weighted.
- 13. A wave energy converter according to any one of claims 1-10, wherein the resistance means comprises an anchor.
- 14. A wave energy converter substantially as hereinbcforc described with reference to the accompanying drawing
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0715961A GB2451879A (en) | 2007-08-16 | 2007-08-16 | Wave energy converter with hydraulically compressed pump chamber |
| PCT/GB2008/050715 WO2009022186A2 (en) | 2007-08-16 | 2008-08-15 | Wave energy converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0715961A GB2451879A (en) | 2007-08-16 | 2007-08-16 | Wave energy converter with hydraulically compressed pump chamber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0715961D0 GB0715961D0 (en) | 2007-09-26 |
| GB2451879A true GB2451879A (en) | 2009-02-18 |
Family
ID=38566467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0715961A Withdrawn GB2451879A (en) | 2007-08-16 | 2007-08-16 | Wave energy converter with hydraulically compressed pump chamber |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2451879A (en) |
| WO (1) | WO2009022186A2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3487228A (en) * | 1967-04-17 | 1969-12-30 | Bernard Kriegel | Power generating system |
| GB2044843A (en) * | 1979-03-07 | 1980-10-22 | British Petroleum Co | Wave energy device |
| GB2068469A (en) * | 1980-01-31 | 1981-08-12 | Sendra Zurita H | Electrical power station driven by wave energy |
| EP0594537A1 (en) * | 1992-10-19 | 1994-04-27 | Branislav Previsic | Wave power device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2007314B (en) * | 1977-10-13 | 1982-03-24 | British Petroleum Co | Wave energy device |
| GB2081388A (en) * | 1980-08-04 | 1982-02-17 | Szuler Jan | Wave energy turbine |
| JPH06171577A (en) * | 1992-12-08 | 1994-06-21 | Kuroishi Tekko Kk | Wave vibration type generating light emitting float |
| CA2196224C (en) * | 1997-01-29 | 2003-07-01 | Gerald John Vowles | Wave energy generator |
| US6833631B2 (en) * | 2001-04-05 | 2004-12-21 | Van Breems Martinus | Apparatus and methods for energy conversion in an ocean environment |
| US6575712B1 (en) * | 2001-09-28 | 2003-06-10 | Slavcho Slavchev | Air compressor system |
| GB0309964D0 (en) * | 2003-05-01 | 2003-06-04 | Adamson Thomas | A device |
| GB0501873D0 (en) * | 2005-01-29 | 2005-03-09 | Palmer Bruce W | Wave energy converter |
-
2007
- 2007-08-16 GB GB0715961A patent/GB2451879A/en not_active Withdrawn
-
2008
- 2008-08-15 WO PCT/GB2008/050715 patent/WO2009022186A2/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3487228A (en) * | 1967-04-17 | 1969-12-30 | Bernard Kriegel | Power generating system |
| GB2044843A (en) * | 1979-03-07 | 1980-10-22 | British Petroleum Co | Wave energy device |
| GB2068469A (en) * | 1980-01-31 | 1981-08-12 | Sendra Zurita H | Electrical power station driven by wave energy |
| EP0594537A1 (en) * | 1992-10-19 | 1994-04-27 | Branislav Previsic | Wave power device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009022186A3 (en) | 2009-08-13 |
| WO2009022186A2 (en) | 2009-02-19 |
| GB0715961D0 (en) | 2007-09-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| COOA | Change in applicant's name or ownership of the application | ||
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |