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GB2486279B - Wave energy converter - Google Patents

Wave energy converter

Info

Publication number
GB2486279B
GB2486279B GB1021031.8A GB201021031A GB2486279B GB 2486279 B GB2486279 B GB 2486279B GB 201021031 A GB201021031 A GB 201021031A GB 2486279 B GB2486279 B GB 2486279B
Authority
GB
United Kingdom
Prior art keywords
wave energy
energy converter
mode
generator
converter
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.)
Expired - Fee Related
Application number
GB1021031.8A
Other versions
GB2486279A (en
GB201021031D0 (en
Inventor
Stephen John Packard
Malcolm Van Den Burgh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trident Energy Ltd
Original Assignee
Trident Energy Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Trident Energy Ltd filed Critical Trident Energy Ltd
Priority to GB1021031.8A priority Critical patent/GB2486279B/en
Publication of GB201021031D0 publication Critical patent/GB201021031D0/en
Priority to PCT/GB2011/001705 priority patent/WO2012076851A1/en
Priority to EP11813681.1A priority patent/EP2649304A1/en
Publication of GB2486279A publication Critical patent/GB2486279A/en
Application granted granted Critical
Publication of GB2486279B publication Critical patent/GB2486279B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F03B13/16—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
    • F03B13/1845—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 slides relative to the rem
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
    • B63B39/10—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by damping the waves, e.g. by pouring oil on water
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/06—Moles; Piers; Quays; Quay walls; Groynes; Breakwaters ; Wave dissipating walls; Quay equipment
    • E02B3/062—Constructions floating in operational condition, e.g. breakwaters or wave dissipating walls
    • 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
    • F03B13/1845—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 slides relative to the rem
    • F03B13/1855—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 slides relative to the rem where the connection between wom and conversion system takes tension and compression
    • 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
    • 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
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
    • 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
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/008—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations the wind motor being combined with water energy converters, e.g. a water turbine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B2035/4433—Floating structures carrying electric power plants
    • B63B2035/4466—Floating structures carrying electric power plants for converting water energy into electric energy, e.g. from tidal flows, waves or currents
    • 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
    • F05B2220/00—Application
    • F05B2220/70—Application in combination with
    • F05B2220/706—Application in combination with an electrical generator
    • F05B2220/707—Application in combination with an electrical generator of the linear type
    • 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
    • F05B2240/00—Components
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/93—Mounting on supporting structures or systems on a structure floating on a liquid surface
    • 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
    • F05B2270/00—Control
    • F05B2270/10—Purpose of the control system
    • F05B2270/18—Purpose of the control system to control buoyancy
    • 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
    • F05B2270/00—Control
    • F05B2270/10—Purpose of the control system
    • F05B2270/20—Purpose of the control system to optimise the performance of a machine
    • F05B2270/202—Tuning to wave conditions
    • 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
    • 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
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • 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
    • Y02E10/70—Wind energy
    • Y02E10/727—Offshore wind turbines

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Power Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

A wave energy converter which can be operated in a generation mode for converting wave energy into electricity or a damping mode in which wave motion is reduced more than in generation mode and the amount of wave energy converted into electricity is less than in generation mode. The converter has at least one float 1 for immersion in waves 20 connected to an armature 2 of a generator and a controller 30. Preferably the damping mode actively moves the float relative to the generator stator by using the generator as a motor. The wave energy converter may be used on a floating marine platform, such as a floating wind turbine, where the damping mode is used to reduce the motion of the platform. Also described is a method of boarding a marine platform by using the wave energy converter in the damping mode to aid boarding.
GB1021031.8A 2010-12-10 2010-12-10 Wave energy converter Expired - Fee Related GB2486279B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB1021031.8A GB2486279B (en) 2010-12-10 2010-12-10 Wave energy converter
PCT/GB2011/001705 WO2012076851A1 (en) 2010-12-10 2011-12-09 Wave energy converter
EP11813681.1A EP2649304A1 (en) 2010-12-10 2011-12-09 Wave energy converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1021031.8A GB2486279B (en) 2010-12-10 2010-12-10 Wave energy converter

Publications (3)

Publication Number Publication Date
GB201021031D0 GB201021031D0 (en) 2011-01-26
GB2486279A GB2486279A (en) 2012-06-13
GB2486279B true GB2486279B (en) 2013-11-06

Family

ID=43567042

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1021031.8A Expired - Fee Related GB2486279B (en) 2010-12-10 2010-12-10 Wave energy converter

Country Status (3)

Country Link
EP (1) EP2649304A1 (en)
GB (1) GB2486279B (en)
WO (1) WO2012076851A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106089558A (en) * 2016-02-22 2016-11-09 四川行之智汇知识产权运营有限公司 A kind of ocean wave generator
CN106089547A (en) * 2016-02-22 2016-11-09 四川行之智汇知识产权运营有限公司 Track structure for seawave power generation
WO2021098413A1 (en) * 2019-11-19 2021-05-27 邱东平 Method for enhancing wave energy of floating body

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2013323151C1 (en) * 2012-09-28 2017-05-25 Columbia Power Technologies, Inc. Method and system for wave energy conversion
WO2017090790A1 (en) * 2015-11-25 2017-06-01 한국해양과학기술원 Floating-type power generation apparatus and integrated power generation system having same
WO2017090791A1 (en) * 2015-11-25 2017-06-01 한국해양과학기술원 Floating-type wave power generation apparatus and integrated power generation system having same
ES2785958T3 (en) * 2017-07-21 2020-10-08 Power conversion plant
US10865763B2 (en) * 2018-01-24 2020-12-15 Dehlsen Associates, Llc Power take-off for a wave energy converter
EP3804069B1 (en) * 2018-05-25 2023-07-26 Noble Drilling A/S Motion-state dependent operation of kinetic generator on a marine vessel or platform
CN109595119B (en) * 2019-01-11 2024-05-24 哈尔滨工程大学 Heave type wave energy power generation device based on floating breakwater
WO2020154184A1 (en) * 2019-01-21 2020-07-30 Dehlsen Associates, Llc A vernier permanent magnet linear generator
RU202538U1 (en) * 2020-11-27 2021-02-24 Федеральное государственное автономное образовательное учреждение высшего образования "Санкт-Петербургский государственный университет аэрокосмического приборостроения" Float wave power plant
CN116877317A (en) * 2023-08-01 2023-10-13 青岛哈尔滨工程大学创新发展中心 Self-adaptive efficient wave energy power generation device and method
CN116873140B (en) * 2023-08-11 2024-05-17 江苏科技大学 Floating platform integrating wave prevention, wave dissipation and ocean energy power generation and working method thereof
IT202300020322A1 (en) * 2023-10-02 2025-04-02 Pederini Enrico Maria METHOD OF CONTROLLING THE ENERGY GENERATION OF A WAVE MOTION SYSTEM
IT202300020313A1 (en) * 2023-10-02 2025-04-02 Pederini Enrico Maria WAVE MOTION HARVESTING SYSTEM

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GB1560499A (en) * 1976-11-20 1980-02-06 Hook C R Apparatus for extracting energy from waves
DE102005040808A1 (en) * 2005-08-29 2007-03-08 Schopf, Walter, Dipl.-Ing. Floating offshore wind energy system stabilization device, has regulating-and control device with components for operation of damping process and for generating power production management for utilization of energy of sea current, at board
GB2442719A (en) * 2006-10-10 2008-04-16 Iti Scotland Ltd Wave and wind power generation system
WO2010110671A1 (en) * 2009-03-23 2010-09-30 Pelagic Power As Floating, anchored installation for energy production
GB2472470A (en) * 2009-08-07 2011-02-09 Korea Electric Power Corp Variable liquid column oscillator using wave energy

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GB9916779D0 (en) 1999-07-16 1999-09-15 Kelly H P G Sea wave to electrical energy conversion plant
GB9916778D0 (en) 1999-07-16 1999-09-15 Kelly H P G Safeguarding wave to electrical power generating apparatus
US6791206B1 (en) * 2002-06-14 2004-09-14 David D. Woodbridge Method for making a stabilized energy conversion operating platform
GB0316869D0 (en) 2003-07-18 2003-08-20 Kelly H P G Method of operation for a self-protecting wave energy conversion plant
CA2537111C (en) * 2004-03-16 2012-10-16 Ocean Power Technologies, Inc. Antirotational structures for wave energy converters
GB0500507D0 (en) 2005-01-11 2005-02-16 Kelly H P G Improvements to tubular electrical generators
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US7420287B2 (en) * 2006-03-28 2008-09-02 Aleksandr Smushkovich Intermittent force powered electromagnetic converters especially for sea waves
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Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
GB1560499A (en) * 1976-11-20 1980-02-06 Hook C R Apparatus for extracting energy from waves
DE102005040808A1 (en) * 2005-08-29 2007-03-08 Schopf, Walter, Dipl.-Ing. Floating offshore wind energy system stabilization device, has regulating-and control device with components for operation of damping process and for generating power production management for utilization of energy of sea current, at board
GB2442719A (en) * 2006-10-10 2008-04-16 Iti Scotland Ltd Wave and wind power generation system
WO2010110671A1 (en) * 2009-03-23 2010-09-30 Pelagic Power As Floating, anchored installation for energy production
GB2472470A (en) * 2009-08-07 2011-02-09 Korea Electric Power Corp Variable liquid column oscillator using wave energy

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106089558A (en) * 2016-02-22 2016-11-09 四川行之智汇知识产权运营有限公司 A kind of ocean wave generator
CN106089547A (en) * 2016-02-22 2016-11-09 四川行之智汇知识产权运营有限公司 Track structure for seawave power generation
WO2021098413A1 (en) * 2019-11-19 2021-05-27 邱东平 Method for enhancing wave energy of floating body

Also Published As

Publication number Publication date
WO2012076851A1 (en) 2012-06-14
GB2486279A (en) 2012-06-13
GB201021031D0 (en) 2011-01-26
EP2649304A1 (en) 2013-10-16

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20191210