WO2007086750A1 - Device for wave-powered generator - Google Patents

Device for wave-powered generator Download PDF

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Publication number
WO2007086750A1
WO2007086750A1 PCT/NO2007/000016 NO2007000016W WO2007086750A1 WO 2007086750 A1 WO2007086750 A1 WO 2007086750A1 NO 2007000016 W NO2007000016 W NO 2007000016W WO 2007086750 A1 WO2007086750 A1 WO 2007086750A1
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WO
WIPO (PCT)
Prior art keywords
trolley
roller way
power generator
float
pulleys
Prior art date
Application number
PCT/NO2007/000016
Other languages
French (fr)
Inventor
Olaf Akervoll
Original Assignee
Craft Services As
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 Craft Services As filed Critical Craft Services As
Publication of WO2007086750A1 publication Critical patent/WO2007086750A1/en

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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
    • F03B13/1885—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 tied to the rem
    • 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

Definitions

  • the invention regards a wave-powered generator, more particularly a main module comprising a roller way onto which a trolley, which drives a generator, is brought to move along the roller way by means of the wave-induced motion of a float, the roller way being inclined or extending substantially in a vertical direction.
  • Transmission means ensure a unidirectional direction of rotation of the generator when the direction of motion of the trolley is changed.
  • a wave-powered generator in which only one of the main elements of the wave-powered generator, a float, is located in the area where the wave power acts, whilst the rest of the wave-powered generator, a main module, is placed submerged below the sea level at a depth where the waves generally do not propagate, the float and the main module being connected in a load-bearing manner to a stay for transmission of wave motion from the float to the main module .
  • the invention concerns a device for a wave- powered generator provided with at least one power generator and cables for transmission of electric current to a consumer, wherein the wave-powered generator comprises a main module provided with a first roller way, the longitudinal extent of which is non-horizontal, i.e.
  • a trolley placed on the roller way, in which a plurality of trolley pulleys are arranged in a manner allowing them to move along the roller way in the longitudinal direction thereof; and transmission means arranged in a manner allowing them to convert the rotary motion of at least one trolley pulley into rotation of the at least one power generator; and also a float placed afloat in an area affected by waves, the float of which is connected to the trolley by means of one or more substantially load-bearing float stays.
  • the transmission means comprise transmission elements arranged to maintain the predetermined direction of rotation in the at least one power generator, preferably independently of the direction of rotation of the at least one trolley pulley.
  • an upper roller way is placed parallel to, and above, the first roller way, the trolley being placed between the roller ways, and wherein the mutual distance between the roller ways exceeds the diameter of the trolley pulleys .
  • the trolley upon experiencing tension provided in the float stay in response to the waves' vertical, upwardly- directed motion of the float, the trolley is arranged in a manner allowing it to bring the trolley pulleys into contact with the upper roller way, and also in a manner allowing it to move in the longitudinal direction of the roller way, whereby rotation of the power generator is allowed.
  • the at least one power generator comprises means for electronic blocking of the current-generating function of the power generator when the power generator rotates in a particular direction.
  • a combination of several power generators, in which the current-generating function of each power generator is disabled at certain and dissimilar directions of rotation, may thus maintain a uniform, even supply of power without using driving means for maintaining the predetermined direction of rotation in each power generator.
  • the opposite contact surfaces of the trolley- pulleys and the roller ways are provided with a friction layer.
  • the opposite contact surfaces of the trolley pulleys and the roller ways are toothed.
  • the float stay is provided with an overload protection device.
  • the main module is placed afloat above the seabed and is provided with buoyancy elements and also anchor means fastened to the seabed.
  • the trolley is provided with ballast.
  • Fig. 1 shows a principle sketch of a wave-powered generator having two inclined roller ways according to the invention.
  • Fig. 2 shows a principle sketch of a wave-powered generator having one substantially vertical roller way according to the invention.
  • FIG 1 in which a main module 1 is anchored to a seabed 7.
  • the main module 7 is provided with buoyancy elements 31 to be able to float in a submerged state, and it is connected to a float 3 floating on a water surface 5.
  • the main module 1 is provided with first and second inclined roller ways 11a, lib.
  • the roller ways 11a, Hb are mutually parallel and are attached to a framework 12.
  • a trolley 13 is placed between the roller ways Ha, Hb.
  • the trolley 13 is provided with pulleys 15. In order to cause the pulleys 15 not to touch the second roller way Ha, lib when touching the first roller way Ha, Hb, the distance between the roller ways Ha, Hb exceeds the diameter of the pulleys 15.
  • the trolley comprises transmission means in the form of a gear wheel 17a and a transmission drive 17b engaged with the gear wheel when operational.
  • the gear wheel 17a is arranged in a manner allowing it to engage with a toothed portion (not shown) of the first roller way Ha when the pulleys 15 move along the first roller way Ha, and in a manner allowing it to engage with a toothed portion (not shown) of the second roller way Hb when the pulleys 15 move along the second roller way Hb, insofar as the toothed portions span substantially the entire longitudinal extent of the roller ways Ha, Hb.
  • the transmission drive 17b e.g. a gear drive, chain drive or belt drive, is also engaged with a power generator 19, so as to impart rotation to a rotor (not shown) when the gear wheel 17a is set into rotation due to the motion of the trolley 13 along the roller ways Ha, Hb.
  • the gear wheel 17a may be in engagement with at least one of the pulleys 15.
  • the opposite contact surfaces of the pulleys 15 and the roller ways Ha, Hb advantageously are provided with a friction means.
  • they may be toothed. The purpose of so doing is to reduce the risk of slippage between the generator- driving pulley 15 and the roller way Ha, Hb.
  • Ballast elements 23 are attached to the trolley 13 via a fastening arrangement 25.
  • the float 3 is connected to the trolley 13 via a load-bearing stay arrangement 21.
  • the stay arrangement 21 comprises an overload protection device 21a which ensures that the float 3 may be released from the main module 1 in a situation involving a risk of, for example, extreme wave motion causing damage to the main module 1.
  • buoyancy elements 31 of the main module 1 are connected to the framework 12 of the main module 1 by means of stays
  • the main module 1 is secured to the seabed 7 by means of anchors 33 and anchor lines 32.
  • the power generator 19 is connected to a power distribution network (not shown) via cables extending along the seabed 7 to a switching and transformer station (not shown) .
  • the power generator 19 comprises means known per se (not shown) in order to maintain a specified electric current frequency.
  • FIG. 2 shows en alternative embodiment, in which the main module 1 is provided with a roller way 11a arranged substantially vertical.
  • the reference numerals depict elements as described above.
  • the trolley 13 is provided with support pulleys 15a arranged to roll along the opposite side, relative to the pulleys 15, of the roller way 11a.
  • the transmission drive 17b comprises means (not shown) arranged to maintain the same direction of rotation of the generator 19 when the direction of motion of the trolley 13 changes, for example in the form of free wheels.
  • the trolley 13 In response to the wave's 5 upwardly—directed motion of the float 3, the trolley 13 is lifted into engagement with the upper roller way lib. Due to the inclination of the roller way, the trolley 13 then is pulled upwards whilst the pulleys 15 rotate along the upper roller way lib.
  • the trolley 13 When the float 5 begins to fall into a wave trough, the trolley 13 is lowered by means of gravity into engagement with the lower roller way 11a, after which a downwardly-directed motion along the lower roller way 11a is initiated.
  • the pulleys 15 start to rotate in the same direction as during the upwardly- directed motion along the upper roller way lib. Thereby, the same direction of rotation of the power generator 19 is maintained.
  • the pulleys 15 or the transmission drive 17b may, as indicated above, be provided with free wheels (not shown) arranged in a manner wherein, for example, a pulley 15, or a pair of pulleys 15, is provided with a free wheel that locks upon right-hand rotation, whilst another pulley 15, or another pair of pulleys 15, is provided with a free wheel that locks upon left-hand rotation.
  • the object of the invention may thus be achieved through use of only one roller way 11a, as disclosed in figure 2.
  • the main module 1 may be provided with secondary buoyancy elements (not shown) to allow the main module 1, if in a situation where the buoyancy elements 31 are lost, to be kept afloat at a depth at which the ballast elements 23 rest on the seabed. This level of floating is determined by the fastening arrangement 25 of the ballast elements 23.

Abstract

A device for a wave-powered generator provided with at least one power generator (19) and cables (35) for transmission of electric current to a consumer, wherein the wave-powered generator comprises a main module (1) provided with: a first roller way (lla), the longitudinal extent of which is non- horizontal, i.e. inclined or vertical, and which is submerged in water and anchored to a seabed (7) ; a trolley (13) placed on the roller way (Ha) , in which a plurality of trolley pulleys (15) are arranged in a manner allowing them to move along the roller way (Ha) in the longitudinal direction thereof; and transmission means (17a, 17b) arranged in a manner allowing them to convert the rotary motion of at least one trolley pulley (15) into rotation of the at least one power generator (19) ; and also a float (3) placed afloat in an area affected by waves (5) , the float of which is connected to the trolley (13) by means of one or more substantially load-bearing float stays (21) .

Description

A DEVICE FOR A WAVE-POWERED GENERATOR
The invention regards a wave-powered generator, more particularly a main module comprising a roller way onto which a trolley, which drives a generator, is brought to move along the roller way by means of the wave-induced motion of a float, the roller way being inclined or extending substantially in a vertical direction. Transmission means ensure a unidirectional direction of rotation of the generator when the direction of motion of the trolley is changed.
Many different systems for exploitation of wave and tidal power for production of electric current are known. The problems in this area have been related to the technical equipment not being able to withstand the heavy loads inflicted on a wave-powered generator by the waves, and the efficiency has been inadequate. In order to avoid breakdown, attempts have been made to move the wave-powered generator into areas of "calmer" sea- and weather conditions. Naturally, this has resulted in a poorer wave power utilization and efficiency. The object of the invention is to remedy or to reduce at least one of the disadvantages of the prior art.
The object is achieved by means of features disclosed in the description below and in the subsequent claims.
In order to achieve maximum utilization of a wave- and tidal- powered generator, the equipment must be placed in areas that are exposed to bad weather and heavy waves. It is an object of the invention to provide a wave-powered generator in which only one of the main elements of the wave-powered generator, a float, is located in the area where the wave power acts, whilst the rest of the wave-powered generator, a main module, is placed submerged below the sea level at a depth where the waves generally do not propagate, the float and the main module being connected in a load-bearing manner to a stay for transmission of wave motion from the float to the main module .
In particular, the invention concerns a device for a wave- powered generator provided with at least one power generator and cables for transmission of electric current to a consumer, wherein the wave-powered generator comprises a main module provided with a first roller way, the longitudinal extent of which is non-horizontal, i.e. inclined or vertical, and which is submerged in water and anchored to a seabed; a trolley placed on the roller way, in which a plurality of trolley pulleys are arranged in a manner allowing them to move along the roller way in the longitudinal direction thereof; and transmission means arranged in a manner allowing them to convert the rotary motion of at least one trolley pulley into rotation of the at least one power generator; and also a float placed afloat in an area affected by waves, the float of which is connected to the trolley by means of one or more substantially load-bearing float stays.
Advantageously, the transmission means comprise transmission elements arranged to maintain the predetermined direction of rotation in the at least one power generator, preferably independently of the direction of rotation of the at least one trolley pulley.
Advantageously, an upper roller way is placed parallel to, and above, the first roller way, the trolley being placed between the roller ways, and wherein the mutual distance between the roller ways exceeds the diameter of the trolley pulleys .
Advantageously, and upon experiencing tension provided in the float stay in response to the waves' vertical, upwardly- directed motion of the float, the trolley is arranged in a manner allowing it to bring the trolley pulleys into contact with the upper roller way, and also in a manner allowing it to move in the longitudinal direction of the roller way, whereby rotation of the power generator is allowed.
Alternatively, the at least one power generator comprises means for electronic blocking of the current-generating function of the power generator when the power generator rotates in a particular direction. A combination of several power generators, in which the current-generating function of each power generator is disabled at certain and dissimilar directions of rotation, may thus maintain a uniform, even supply of power without using driving means for maintaining the predetermined direction of rotation in each power generator. Advantageously, the opposite contact surfaces of the trolley- pulleys and the roller ways are provided with a friction layer. Alternatively, the opposite contact surfaces of the trolley pulleys and the roller ways are toothed.
Preferably, the float stay is provided with an overload protection device.
Advantageously, the main module is placed afloat above the seabed and is provided with buoyancy elements and also anchor means fastened to the seabed.
Advantageously, the trolley is provided with ballast.
A non-limiting example of a preferred embodiment is described in the following and is illustrated in the accompanying drawings, in which:
Fig. 1 shows a principle sketch of a wave-powered generator having two inclined roller ways according to the invention; and
Fig. 2 shows a principle sketch of a wave-powered generator having one substantially vertical roller way according to the invention.
Reference is first made to figure 1, in which a main module 1 is anchored to a seabed 7. The main module 7 is provided with buoyancy elements 31 to be able to float in a submerged state, and it is connected to a float 3 floating on a water surface 5. The main module 1 is provided with first and second inclined roller ways 11a, lib. The roller ways 11a, Hb are mutually parallel and are attached to a framework 12. A trolley 13 is placed between the roller ways Ha, Hb. The trolley 13 is provided with pulleys 15. In order to cause the pulleys 15 not to touch the second roller way Ha, lib when touching the first roller way Ha, Hb, the distance between the roller ways Ha, Hb exceeds the diameter of the pulleys 15.
The trolley comprises transmission means in the form of a gear wheel 17a and a transmission drive 17b engaged with the gear wheel when operational. Having an adapted diameter, the gear wheel 17a is arranged in a manner allowing it to engage with a toothed portion (not shown) of the first roller way Ha when the pulleys 15 move along the first roller way Ha, and in a manner allowing it to engage with a toothed portion (not shown) of the second roller way Hb when the pulleys 15 move along the second roller way Hb, insofar as the toothed portions span substantially the entire longitudinal extent of the roller ways Ha, Hb. The transmission drive 17b, e.g. a gear drive, chain drive or belt drive, is also engaged with a power generator 19, so as to impart rotation to a rotor (not shown) when the gear wheel 17a is set into rotation due to the motion of the trolley 13 along the roller ways Ha, Hb.
Alternatively, the gear wheel 17a may be in engagement with at least one of the pulleys 15. Then, the opposite contact surfaces of the pulleys 15 and the roller ways Ha, Hb advantageously are provided with a friction means. Alternatively, they may be toothed. The purpose of so doing is to reduce the risk of slippage between the generator- driving pulley 15 and the roller way Ha, Hb. Ballast elements 23 are attached to the trolley 13 via a fastening arrangement 25.
The float 3 is connected to the trolley 13 via a load-bearing stay arrangement 21. The stay arrangement 21 comprises an overload protection device 21a which ensures that the float 3 may be released from the main module 1 in a situation involving a risk of, for example, extreme wave motion causing damage to the main module 1.
The buoyancy elements 31 of the main module 1 are connected to the framework 12 of the main module 1 by means of stays
31a. The main module 1 is secured to the seabed 7 by means of anchors 33 and anchor lines 32.
The power generator 19 is connected to a power distribution network (not shown) via cables extending along the seabed 7 to a switching and transformer station (not shown) .
In the case of an alternating current power generator, the power generator 19 comprises means known per se (not shown) in order to maintain a specified electric current frequency.
Figure 2 shows en alternative embodiment, in which the main module 1 is provided with a roller way 11a arranged substantially vertical. The reference numerals depict elements as described above. In addition to the ordinary pulleys 15, the trolley 13 is provided with support pulleys 15a arranged to roll along the opposite side, relative to the pulleys 15, of the roller way 11a. Thus, the trolley 13 is kept in contact with the roller way 11a, whereby the motion of the trolley 13 along the roller way 11a causes the generator 19 to rotate. The transmission drive 17b comprises means (not shown) arranged to maintain the same direction of rotation of the generator 19 when the direction of motion of the trolley 13 changes, for example in the form of free wheels.
In response to the wave's 5 upwardly—directed motion of the float 3, the trolley 13 is lifted into engagement with the upper roller way lib. Due to the inclination of the roller way, the trolley 13 then is pulled upwards whilst the pulleys 15 rotate along the upper roller way lib. When the float 5 begins to fall into a wave trough, the trolley 13 is lowered by means of gravity into engagement with the lower roller way 11a, after which a downwardly-directed motion along the lower roller way 11a is initiated. Once again the pulleys 15 start to rotate in the same direction as during the upwardly- directed motion along the upper roller way lib. Thereby, the same direction of rotation of the power generator 19 is maintained.
Many possibilities exist for maintaining a uniform direction of rotation of the power generator 19 during alternating directions of motion of the trolley 13. For example, the pulleys 15 or the transmission drive 17b may, as indicated above, be provided with free wheels (not shown) arranged in a manner wherein, for example, a pulley 15, or a pair of pulleys 15, is provided with a free wheel that locks upon right-hand rotation, whilst another pulley 15, or another pair of pulleys 15, is provided with a free wheel that locks upon left-hand rotation. The object of the invention may thus be achieved through use of only one roller way 11a, as disclosed in figure 2.
The main module 1 may be provided with secondary buoyancy elements (not shown) to allow the main module 1, if in a situation where the buoyancy elements 31 are lost, to be kept afloat at a depth at which the ballast elements 23 rest on the seabed. This level of floating is determined by the fastening arrangement 25 of the ballast elements 23.

Claims

C l a i m s
1. A device for a wave-powered generator provided with at least one power generator (19) and cables (35) for transmission of electric current to a consumer, c ha r a c t e r i z e d i n that the wave-powered generator comprises:
- a main module (1) provided with: a first roller way (lla) , the longitudinal extent of which is non-horizontal, i.e. inclined or vertical, and which is submerged in water and anchored to a seabed (7) ; a trolley (13) placed on the roller way (Ha), in which a plurality of trolley pulleys (15) are arranged in a manner allowing them to move along the roller way (Ha) in the longitudinal direction thereof; and transmission means (17a, 17b) arranged in a manner allowing them to convert the rotary motion of at least one trolley pulley (15) into rotation of the at least one power generator (19); and also
- a float (3) placed afloat in an area affected by waves (5), the float of which is connected to the trolley (13) by means of one or more substantially load-bearing float stays (21) .
2. The device according to claim 1, c h a r a c t e r i z e d i n that the transmission means (17a, 17b) are arranged in a manner allowing them to convert the rotary motion of at least one trolley pulley (15) into rotation of the at least one power generator (19) in a predetermined direction.
3. The device according to claim 1, c ha r a c t e r i z e d i n that the transmission means (17a, 17b) comprise transmission elements arranged to maintain the predetermined direction of rotation in the at least one power generator (19) independently of the direction of rotation of the at least one trolley pulley (15) .
4. The device according to claim 1, c ha r a c t e r i z e d i n that an upper roller way (lib) is placed parallel to, and above, the first roller way (lla), the trolley (13) being placed between the roller ways (Ha, lib) , and wherein the mutual distance between the roller ways (Ha, lib) exceeds the diameter of the trolley pulleys (15) .
5. The device according to claim 1, c ha r a c t e r i z e d i n that the trolley (13) , by means of tension provided in the float stay (21) in response to the waves' (5) vertical, upwardly-directed motion of the float (3), is arranged in a manner allowing it to bring the trolley pulleys (15) into contact with the upper roller way (lib) , and also in a manner allowing it to move in the longitudinal direction of the roller way (Ha), whereby rotation of the power generator (19) is allowed.
6. The device according to claim 1, c h a ra c t e r i z e d i n that the at least one power generator (19) comprises means for electronic blocking of the current-generating function of the power generator (19) when the power generator (19) rotates in a particular direction.
7. The device according to claims 1 and 5, c ha r a c t e r i z e d i n that the opposite contact surfaces of the trolley pulleys (15) and the roller way(s) (11a, lib) are provided with means for preventing or reducing the risk of slippage during the rotation of the trolley pulleys (15) along the roller way(s) (11a, lib) .
8. The device according to any one of claims 1 and 5, c ha r a c t e r i z e d i n that the opposite contact surfaces of the trolley pulleys (15) and the roller way(s) (11a, lib) are toothed.
9. The device according to claims 1 and 5, c ha r a c t e r i z e d i n that the float stay (21) is provided with an overload protection device (21a) .
10. The device according to claim 1, c ha r a c t e r i z e d i n that the main module (1) is placed afloat above the seabed (7) and is provided with buoyancy elements (31) and also anchor means (32, 33) fastened to the seabed (7) .
11. The device according to claim 1, c har a c t e r i z e d i n that the trolley (13) is provided with ballast elements (23) .
PCT/NO2007/000016 2006-01-25 2007-01-15 Device for wave-powered generator WO2007086750A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20060396A NO324112B1 (en) 2006-01-25 2006-01-25 Apparatus at an electric power plant
NO20060396 2006-01-25

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008115066A2 (en) * 2007-03-16 2008-09-25 Craft Services As Device for wave-powered generator
WO2011054125A1 (en) * 2009-11-09 2011-05-12 Rodolfo Requena Rivera Sea water pumping device
WO2011089280A1 (en) 2010-01-21 2011-07-28 Echenique Gordillo Inigo Balance wave-energy electricity generation system
WO2013064607A1 (en) * 2011-11-04 2013-05-10 Greco Paolo Device for conversion of mechanical energy from sea waves to electric energy
WO2019075539A1 (en) * 2017-10-18 2019-04-25 Johann Hoffmann Material separation system
US10731622B2 (en) 2016-08-03 2020-08-04 Ensea S.R.L. Device for conversion of mechanical energy from sea waves to electric energy
RU2759593C1 (en) * 2020-12-04 2021-11-15 Гафтдин Газдалиевич Газдалиев Wind and water power unit

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Publication number Priority date Publication date Assignee Title
GB167777A (en) * 1920-08-16 1922-11-13 Percy Alexander Charles Bates Improvements in and relating to the utilisation of the motion of waves
US6020653A (en) * 1997-11-18 2000-02-01 Aqua Magnetics, Inc. Submerged reciprocating electric generator
US20040251692A1 (en) * 2002-01-10 2004-12-16 Mats Leijon Electric device and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB167777A (en) * 1920-08-16 1922-11-13 Percy Alexander Charles Bates Improvements in and relating to the utilisation of the motion of waves
US6020653A (en) * 1997-11-18 2000-02-01 Aqua Magnetics, Inc. Submerged reciprocating electric generator
US20040251692A1 (en) * 2002-01-10 2004-12-16 Mats Leijon Electric device and method

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2460587B (en) * 2007-03-16 2011-11-16 Craft Services As Device for wave-powered generator
WO2008115066A3 (en) * 2007-03-16 2008-12-18 Craft Services As Device for wave-powered generator
GB2460587A (en) * 2007-03-16 2009-12-09 Craft Services As Device for wave-powered generator
ES2340018A1 (en) * 2007-03-16 2010-05-27 Craft Services As Device for wave-powered generator
WO2008115066A2 (en) * 2007-03-16 2008-09-25 Craft Services As Device for wave-powered generator
US8319359B2 (en) 2007-03-16 2012-11-27 Craft Services As Device for wave-powered generator
WO2011054125A1 (en) * 2009-11-09 2011-05-12 Rodolfo Requena Rivera Sea water pumping device
WO2011089280A1 (en) 2010-01-21 2011-07-28 Echenique Gordillo Inigo Balance wave-energy electricity generation system
WO2013064607A1 (en) * 2011-11-04 2013-05-10 Greco Paolo Device for conversion of mechanical energy from sea waves to electric energy
US9062649B2 (en) 2011-11-04 2015-06-23 Ensea S.R.L. Device for conversion of mechanical energy from sea waves to electric energy
US10731622B2 (en) 2016-08-03 2020-08-04 Ensea S.R.L. Device for conversion of mechanical energy from sea waves to electric energy
WO2019075539A1 (en) * 2017-10-18 2019-04-25 Johann Hoffmann Material separation system
RU2759593C1 (en) * 2020-12-04 2021-11-15 Гафтдин Газдалиевич Газдалиев Wind and water power unit

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Publication number Publication date
NO20060396L (en) 2007-07-26
NO324112B1 (en) 2007-08-27

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