Tide And Wave Motors Patents (Class 290/53)
  • Patent number: 10844829
    Abstract: The present invention provides an oscillating water column-oscillating buoy combined wave energy converter. The present invention combines the advantages of the wave energy converters of the oscillating water column and the oscillating buoy. The conversion principles of wave energy of the oscillating water column and the oscillating buoy are on the contrary. The oscillating water column works when the structure does not move, while the oscillating buoy works when the structure substantially vibrates. The oscillating water column and the oscillating buoy are respectively operated in respective spectral ranges without affecting each other, thereby expanding the effective frequency band width of wave energy conversion. Due to the characteristic of absorbing the wave energy at all directions of 360°, the absorption efficiency of the wave energy is enhanced. Through the adoption of a fixed structure, stability of the converter can be ensured, generating efficiency is enhanced and maintenance is facilitated.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: November 24, 2020
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Dezhi Ning, Yu Zhou, Chongwei Zhang
  • Patent number: 10844831
    Abstract: Methods, system and devices 10 for capturing wave energy are disclosed. A submersible wave energy capture device 10 comprises a tube 12 and a plurality of one-way valves 21, 31, 41. The tube 12 has a seawater inlet 11 at an upstream end 10u of the tube 12. The downstream end 10d of the tube 12 is communicable with an energy utilisation means 2 powered by seawater flow from the tube 12. The one-way valves 21, 31, 41 divide the tube 12 into a series of chambers 20, 30, 40. The chambers comprises elastic walls 22, 32, 42. These are deformable so as to alter an effective internal volume of each respective chamber 20, 30, 40. The valves 21, 31, 41, open to permit water flow within the tube 12 in a downstream direction, and close to resist water flow within the tube 12 in an upstream direction.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: November 24, 2020
    Assignee: FORTITUDO MARIS LTD
    Inventor: Zsolt Szarka
  • Patent number: 10815961
    Abstract: The ocean wave power generator with an artificially intelligent controller is a wave power generator based on a two-body mass-spring-damper system, including a first mass, a second mass, and a linear generator coupled to the second mass. A linear actuator is coupled to the second mass, and first and second motion sensors are positioned for detecting position and speed of the first and second masses. The maximum power output of the linear generator is determined based on the position and the speed of the first mass, and an ideal position and an ideal speed of the second mass, corresponding to the maximum power output of the linear generator and the position and the speed of the first mass, are determined. The position and the speed of the second mass are adjusted using a linear actuator to match the ideal position and the ideal speed of the second mass.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: October 27, 2020
    Assignee: ABU DHABI POLYTECHNIC
    Inventor: Murad Al-Shibli
  • Patent number: 10780367
    Abstract: A track start wedge includes a housing, a ratchet gear assembly, and a locking pawl assembly. The ratchet gear assembly is disposed at least partially within the housing and includes a bar, a pinion gear at each end of the bar, and a ratchet gear between the ends of the bar. The locking pawl assembly is coupled to the housing and includes a locking pawl disengageably coupled to the ratchet gear and a spring operable to bias the locking pawl into engagement with the ratchet gear. The ratchet gear assembly is configured to rotate in unison in a first direction toward a front of the housing and a second direction toward a rear of the housing, but the locking pawl prevents rotation of the ratchet gear in the second direction when the locking pawl is engaged with the ratchet gear.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: September 22, 2020
    Assignee: EVERLAST CLIMBING INDUSTRIES, INC.
    Inventors: Charles Henry, Shane Clagett, John Florin
  • Patent number: 10731622
    Abstract: Device for converting mechanical energy from sea waves into electric energy including at least a float and two rigid rods. The rods are preferably anchored to the seabed at one end, and to the float at another end. There are also two ballasts that effect their weight towards the sea bed to keep the free ends of the rods constantly in traction and free to rotate around their hinges. The float oscillates up and down along a vertical line due to waves. There are at least two cables that connect the free ends of the rods to a transmission shaft of a generator positioned along the vertical line so that the vertical, horizontal, or rotary oscillatory motion of the float caused by the waves generates an oscillatory motion of the rods which are pivoted on their respective hinges, and thus transfers rotary motion to the transmission shaft of the generator.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: August 4, 2020
    Assignee: Ensea S.R.L.
    Inventors: Paolo Greco, Marcello Di Risio
  • Patent number: 10711760
    Abstract: A wave operated assembly (20) configured to be submerged in a body of water (12), the wave operated assembly (20) comprising a wave actuated member (24), a second portion and a piston assembly, pressure chamber (22) or spring coupled between the wave actuated member (24) and the second portion. The wave actuated member (24) and the fixed portion each define part of a first chamber (22) or volume comprising or configured to receive a fluid. A lower portion of the wave actuated member (24) at least partly defines a free surface (35) between the fluid within the first chamber (22) or volume and the body of water (12). The wave actuated member (24) is movable relative to the second portion. The piston assembly, pressure chamber (22) or spring is configured to apply a force on the wave actuated member (24) that works in opposition to a force on the wave actuated member (24) due to the fluid in the first chamber (22) or volume.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: July 14, 2020
    Assignee: AWS Ocean Energy Limited
    Inventor: Simon Grey
  • Patent number: 10662918
    Abstract: Described herein are wave energy conversion systems including actuated geometry components. An example system may include at least one body portion configured to transfer wave energy to a power take off device, and at least one actuated geometry component that is connected to the at least one body portion, the at least one actuated geometry component operable to modify a geometric profile of the system.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: May 26, 2020
    Assignee: Alliance for Sustainable Energy, LLC
    Inventors: Robert Thresher, Michael Lawson, Nathan Tom, Jason Cotrell, Yi-Hsiang Yu, Alan Wright
  • Patent number: 10662926
    Abstract: The present invention relates to a floating wind energy harvesting apparatus for offshore installation, comprising an elongated wind turbine body extending along a longitudinal wind turbine body axis; at least one blade attached to the wind turbine body for converting wind energy to rotation of the wind turbine body around the longitudinal wind turbine body axis; an energy converter coupled to the wind turbine body for converting the rotation of the wind turbine body to electrical energy; and a braking arrangement for controllably reducing a rotational speed of the wind turbine body. The braking arrangement comprises an inlet; an outlet; a water transporting arrangement coupled to the wind turbine body to transport water from the inlet to the outlet in response to rotation of the wind turbine body; and an access control arrangement for controllably preventing water from passing through the water transporting arrangement.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: May 26, 2020
    Assignee: SEATWIRL AB
    Inventor: Daniel Ehrnberg
  • Patent number: 10619620
    Abstract: Apparatus comprising a floating platform, a cylinder connected thereto, and a piston having a piston rod connected to a mooring at the sea floor. At least one penstock tube is in fluid connection at its lower end with a lower portion of the cylinder, below the piston. The penstock tube being provided along the cylinder and has an opening at the upper end arranged so that water pumped upwards in the at least one penstock tube will hit a water turbine arranged above the cylinder. The water turbine being in connection with a generator. The cylinder has an opening in an upper portion and in the lower portion thereof, provided with a one-way valve allowing water into the lower portion of the cylinder while the cylinder moves downwards, and when the platform rises, water will be refilled in the upper section through the opening.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: April 14, 2020
    Assignee: NOVIGE AB
    Inventor: Jan Skjoldhammer
  • Patent number: 10605223
    Abstract: The invention relates to a module for converting wave energy, consisting of a floating enclosure comprising a hull which communicates its pitching movement to an eccentric mass capable of rotating without backlash about a central axis, and characterized in that: —the pitching is encouraged by the particular profile of the hull and by dynamically adjustable mobile ballast, —the eccentric mass takes the form of an autonomous carriage describing an orbit along a set of circular rails by means of sets of rollers which limit friction and spread load, —an electric generator, mounted on the carriage, meshes with a set of racks of which the pitch, potentially variable, facilitates the electrical conversion, —a generator control system governs the movement of the carriage so as to optimize the extraction of energy.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: March 31, 2020
    Inventors: Felix Elefant, Alexandre Elefant
  • Patent number: 10584674
    Abstract: A hydraulic power generating apparatus which can be easily disposed in a water channel, such as a waterway or a water conducting pipe. The hydraulic power generating apparatus comprises a horizontal rotor supporting housing (4) having a rotor, a holding body (5) erected on an upper surface of the rotor supporting housing (4), a support ring (2) in which the rotor supporting housing (4) is fixed, and a power generator (11). The rotor supporting housing (4) is integrally fixed within the support ring (2) by the holding body (5). The power generator (11) is disposed on the upper part of the holding body (5) protruding from the support ring (2), and the support ring (2) is formed with attachment portions (2A, 2B) for fixing the rotor supporting housing (4) in a water channel.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: March 10, 2020
    Assignee: NTN CORPORATION
    Inventor: Masahiko Suzuki
  • Patent number: 10578075
    Abstract: Disclosed is a novel method, process, and system (hereinafter “method” or “process”) for deploying, stationing, and translocating buoyant wind- and wave-energy converters and/or other buoyant structures or devices, as well as farms of same. Also disclosed is a novel apparatus and/or machine comprising a farm of buoyant wave energy converters deployed by said method and/or configured to be deployed by said method.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: March 3, 2020
    Assignee: Lone Gull Holdings, Ltd.
    Inventors: Garth Alexander Sheldon-Coulson, Brian Lee Moffat
  • Patent number: 10557453
    Abstract: A wave energy converter (100) is provided which comprises a heaving buoy point absorber (122) having a surface piercing float (120) operably coupled to an adjustable reference mass (125) defining a volume for accommodating sea water therein. The surface piercing float and the adjustable reference mass are configured to move together in response to passing waves. A chamber (105) provided within the surface piercing float is in fluid communication with the sea for trapping a volume of air above an enclosed column of water. The height of the enclosed column of water varies as the point absorber reacts against its surface via an adjustable air-spring. A power take off (140) is configured for being driven by a stream of vented air in communication with the chamber as the heaving buoy point absorber reacts against a trapped volume of air. A control mechanism is configured for tuning one or more operating characteristics of the heaving buoy point absorber.
    Type: Grant
    Filed: July 4, 2014
    Date of Patent: February 11, 2020
    Inventor: William Dick
  • Patent number: 10533531
    Abstract: A turbine comprises a shaft (20), a mass (10) eccentrically mounted for rotation about shaft (20), having its center of gravity at a distance from the shaft (20) and a motion base (15). Motion base (15) rigidly supports the shaft (20), and is configured for moving the shaft (20) in any direction of at least two degrees of movement freedom, except for heave. A floating vessel-turbine (120), encloses entirely the eccentrically rotating mass (10) and the motion base (15). The turbine converts ocean wave energy into useful energy, very efficiently.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: January 14, 2020
    Inventor: Vassilios Vamvas
  • Patent number: 10526056
    Abstract: A method and apparatus for producing electricity from a combination of three sources: ocean waves, wind and solar, includes converting an upward and downward motion of a buoyant platform into a rotational motion of a shaft using a plurality of blades mounted to the shaft, the blades causing the shaft to rotate from internal wind energy as the blades move up and down within a cavity. The shaft is coupled to a generator for producing electricity. A wind turbine is mounted to the buoyant platform for converting wind energy into electricity. Further, solar panels are included, for example, mounted to the buoyant platform and/or turbine blades of the wind turbine, the solar panels also generate electricity when exposed to light.
    Type: Grant
    Filed: April 29, 2019
    Date of Patent: January 7, 2020
    Assignee: Physician Electronic Network, LLC
    Inventors: A-Hamid Hakki, Edin Dervishalidovic, Belmina Hakki, Amela Dervishalidovic
  • Patent number: 10514019
    Abstract: A floating piezoelectric assembly for generating energy from waves is provided. The assembly includes a flexible buoyant planar member, an elastic planar member coupled to the same, and two spaced-apart layers of piezoelectric elements extending on and firmly attaching to the top and bottom of the elastic planar member. The elements of a first of the layers are staggered relative to the elements of a second of the layers. The assembly includes a weighted planar member coupled to the buoyant planar member. According to a second aspect, the assembly comprises a first plurality of longitudinally spaced-apart elongate buoyant planar members, a second plurality of longitudinally spaced-apart elongate buoyant planar members, and a series of piezoelectric elements extending between the first and second plurality of buoyant planar members. The assembly further includes a plurality of elastic planar members to which respective ones of the piezoelectric elements couple.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: December 24, 2019
    Inventor: Gaynor Dayson
  • Patent number: 10508640
    Abstract: A hinge system and method for an Articulated Wave Energy Conversion System (AWECS) that provides for hinge and piston pump displacements due to multi-axis forces in allowing adjacent barges of the AWECS to pivot with respect to one another due to wave motion. The hinge system uses a plurality of parallel hinges, and axle segments, coupled between adjacent barges wherein the hinges are coupled to upright trusses positioned transversely along facing edges of each barge. Hinge bracing includes lower V-shaped struts that act as lower stops when the barges pitch up and also include upper struts that act as upper stops when the barges pitch down. The pumps are positioned in parallel. The pumps have special couplings such as ball joint couplings that permit motions other than longitudinal pump/ram motions due to multi-axis forces generated by the wave motion and thus provide omni-directional stress relief to the pumps.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: December 17, 2019
    Assignee: Murtech, Inc.
    Inventors: Robert C. Murtha, Jr., Jeffrey Cerquetti
  • Patent number: 10436171
    Abstract: The disclosed technology provides for an apparatus for translating energy through the use of mechanics, fluid displacement, gravity and buoyancy. The apparatus generally includes a base having float chambers and plunger chambers in fluid communication, a plurality of floats and plungers, and an energy transform assembly. The energy transform assembly includes a plurality of linkage mechanisms supported by the upper support structure and a plurality of linkage mechanisms supported by the lower support structure. Each linkage mechanism includes a pair of levers and an elongated transfer bar, with each lever rotatably affixed to an opposing end of the transfer bar in a manner to translate rotation of one lever with lateral movement of the transfer bar and lateral movement of the transfer bar causes rotation of the other lever.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: October 8, 2019
    Inventor: Ernie N Crouch
  • Patent number: 10423126
    Abstract: A multi-resonant wide band controller decomposes the wave energy converter control problem into sub-problems; an independent single-frequency controller is used for each sub-problem. Thus, each sub-problem controller can be optimized independently. The feedback control enables actual time-domain realization of multi-frequency complex conjugate control. The feedback strategy requires only measurements of the buoy position and velocity. No knowledge of excitation force, wave measurements, nor wave prediction is needed. As an example, the feedback signal processing can be carried out using Fast Fourier Transform with Hanning windows and optimization of amplitudes and phases. Given that the output signal is decomposed into individual frequencies, the implementation of the control is very simple, yet generates energy similar to the complex conjugate control.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: September 24, 2019
    Assignees: National Technology & Engineering Solutions of Sandia, LLC, Michigan Technological University
    Inventors: David G. Wilson, Rush D. Robinett, III, Ossama Abdelkhalik, Jiajun Song, Giorgio Bacelli
  • Patent number: 10415538
    Abstract: A negative-pressure wave generator has a flow-driven assembly and a power-generating assembly disposed in the sea. The flow-driven assembly has multiple Venturi tubes connected to a power generating culvert of the power-generating assembly. The power generating culvert has a generator assembly. When sea water passes, the Venturi tubes generate negative pressure to make the water flow into the flow-driven assembly from the power generating culvert. A large pressure difference is formed between outside sea water out of a turbine disposed in a front end and a chamber disposed in a rear end, and the pressure difference drives the turbine to drive the generator assembly. The transferring efficiency is high and the water in all the flow channels is in low pressure to prevent the water pipes from burst and leakage. The negative-pressure wave generator is simple in structure and solid, lowering the maintenance cost.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: September 17, 2019
    Inventor: Ting-Ching Wu
  • Patent number: 10415537
    Abstract: A parametric excitation dynamic model is used for a three degrees-of-freedom (3-DOF) wave energy converter. Since the heave motion is uncoupled from the pitch and surge modes, the pitch-surge equations of motion can be treated as a linear time varying system, or a linear system with parametric excitation. In such case the parametric exciting frequency can be tuned to twice the natural frequency of the system for higher energy harvesting. A parametric excited 3-DOF wave energy converter can harvest more power, for both regular and irregular waves, compared to the linear 3-DOF. For example, in a Bretschneider wave, the harvested energy in the three modes is about 3.8 times the energy harvested in the heave mode alone; while the same device produces about 3.1 times the heave mode energy when using a linear 3-DOF model.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: September 17, 2019
    Assignees: National Technology & Engineering Solutions of Sandia, LLC, Michigan Technological University, South Dakota Board of Regents
    Inventors: Ossama Abdelkhalik, Rush D. Robinett, III, Shangyan Zou, David G. Wilson, Giorgio Bacelli, Umesh Korde, Ryan G. Coe
  • Patent number: 10393089
    Abstract: A wave energy converter includes a surface float including a non-axisymmetric profile, a reaction plate configured to be submerged below a water surface, and more than one flexible tether, each mechanically coupled to both the surface float and the reaction plate, the reaction plate having a moment of inertia in pitch and roll greater than a moment of inertia in pitch and roll of the surface float.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: August 27, 2019
    Assignee: Oscilla Power Inc.
    Inventors: Timothy R Mundon, Balakrishnan G Nair, Jennifer Vining
  • Patent number: 10393088
    Abstract: The invention relates to an installation having at least one caisson positioned at a given depth in a marine environment, said caisson including a rigid tank in which an oscillating plate moves, said oscillating plate being adapted to oscillate in relation to a vertical axis depending on fluctuations in the height of the water column created by the swell perpendicular to the plate, said tank and plate defining a chamber. The installation is characterized in that the chamber is sealed by a flexible hermetic pouch which is filled with a gas and deforms according to the oscillations of the oscillating plate, the pressure of the gas inside the pouch being adjusted so as to compensate for all or part of the weight of the water column perpendicular to the plate in the absence of swell.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: August 27, 2019
    Inventor: Christian Carme
  • Patent number: 10385820
    Abstract: A wave energy converter utilizes a flotation module that rises and falls with the passage of waves, a submerged tube containing a constriction which multiplies the speed of the water passing therethrough, a turbine (or other hydrokinetic apparatus) positioned so as to extract energy from the accelerated flow of water within and/or through the tube, and a submerged gas- or liquid-filled chamber housing one or more energy conversion components (e.g. generators, transformers, rectifiers, inverters). By providing a chamber in proximity to the turbine, generators can be placed in closer proximity to the turbine that turns them, and the shared shaft can be shorter than if the generators were placed in the buoy adjacent to the surface.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: August 20, 2019
    Inventors: Brian Lee Moffat, Garth Alexander Sheldon-Coulson
  • Patent number: 10371205
    Abstract: A tidal current energy generating device includes an outer frame (1), at least one inner frame (2), at least two hydro turbines (3), at least one center shaft (4), at least one generator (5), and at least three bearings (6). The at least one inner frame (2) is separably disposed in the outer frame (1). At least two hydro turbines (3) are located below a water surface and are disposed in one inner frame (2). At least two hydro turbines (3) are disposed coaxially and are vertical-axis hydro turbines. At least one center shaft (4) is disposed through the at least two hydro turbines (3), the axis direction of the center shaft is perpendicular to the horizontal plane, and the center shaft (4) rotates along with the rotating of the hydro turbines (3). The at least one generator (5) is located above the water surface and connected with one end of the center shaft (4). The at least three bearings are sleeved on the center shaft (4) and are located on two sides of and between the two hydro turbines (3), respectively.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: August 6, 2019
    Assignee: ZHEJIANG ZHOUSHAN LHD ENERGY DEVELOPMENT CO., LTD.
    Inventor: Dong Lin
  • Patent number: 10352288
    Abstract: An ocean wave energy generator and parabolic concentrator system includes a parabolic reflector wall, which may be in the form of a breakwater wall or the like, a generator adapted for mounting beneath a surface of a body of water, and a buoy. The buoy floats on the surface of the water and is coupled to the generator by a chain or the like. Wave-driven vertical oscillation of the buoy drives the generator to generate electrical power. The wall has opposed first and second surfaces, with the first surface thereof facing the buoy and having a parabolic contour. Because of the parabolic contour of the first surface, the first surface can reflect and focus waves to a single focus point or area. The buoy is positioned at the focus point in order to maximize power conversion.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: July 16, 2019
    Inventor: Saad KH. S. M. E. Alsahlawi
  • Patent number: 10344736
    Abstract: The invention provides optimal control of a three-degree-of-freedom wave energy converter using a pseudo-spectral control method. The three modes are the heave, pitch and surge. A dynamic model is characterized by a coupling between the pitch and surge modes, while the heave is decoupled. The heave, however, excites the pitch motion through nonlinear parametric excitation in the pitch mode. The invention can use a Fourier series as basis functions to approximate the states and the control. For the parametric excited case, a sequential quadratic programming approach can be implemented to numerically solve for the optimal control. The numerical results show that the harvested energy from three modes is greater than three times the harvested energy from the heave mode alone. Moreover, the harvested energy using a control that accounts for the parametric excitation is significantly higher than the energy harvested when neglecting this nonlinear parametric excitation term.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: July 9, 2019
    Assignees: National Technology & Engineering Solution of Sandia, LLC, Michigan Technological University
    Inventors: Ossama Abdelkhalik, Giorgio Bacelli, Shangyan Zou, Rush D. Robinett, III, David G. Wilson, Ryan G. Coe
  • Patent number: 10344737
    Abstract: A wave energy converter (1) has: a buoyant structure (2) which, in use, floats on water; a generator (18); a generator drive mechanism (38) on board the buoyant structure (2), the generator drive mechanism (38) having an rotational input drive shaft (20) and a rotational output drive shaft (36); a drive member (22) operably connected to the input drive shaft (20), the drive member (22) being moveable back and forth between a first position and a second position; a biasing arrangement (23, 26) for example a buoyant block acting on the drive member; and, a submerged element 4, 4? which, in use, moves below the surface of the water out of phase with the buoyant structure (2), the drive member (22) being attached by a tether (28) to the submerged element (4).
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: July 9, 2019
    Assignee: AQUA POWER TECHNOLOGIES LIMITED
    Inventor: Samuel Devon Etherington
  • Patent number: 10328996
    Abstract: A connection substation for a plurality of wave energy converters being part of a wave power station includes a transformer and a connecting device for electrically connecting input power cables to a common output cable. The connection substation has a buoyant body portion providing a buoyancy force and a fastening device for securing at least one mooring line connected to an anchor, wherein the at least one fastening device is disposed in the vicinity of the bottom end of the connection substation at a distance from an upper end of the buoyant body portion, wherein the at least one connecting device is disposed in a waterproof compartment in the connection substation, and wherein each of the plurality of input power cables are run so that at least a portion of the cable extends up to a level at least 2 meters above the design waterline of the connection substation.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: June 25, 2019
    Assignee: W4P WAVES4POWER AB
    Inventors: Filip Alm, Lennart Claesson
  • Patent number: 10273930
    Abstract: A power-take-off system for use in a wave energy converter buoy employs a meshing nut and screw shaft assembly for motion conversion. That is, the motion of the buoy float is coupled to drive the nut along the screw shaft on which it is mounted. The linear movement of the nut along the shaft causes the shaft to rotate and this rotational motion is then coupled to rotate an electrical generator.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: April 30, 2019
    Assignee: Ocean Power Technologies, Inc.
    Inventors: Mojtaba Safabakhsh, Chandreshkumar Dubey, John Joseph Bordmann
  • Patent number: 10253747
    Abstract: Disclosed is a system and method for generating and storing energy from water waves. Oscillatory motions of a floating base are transmitted to adjustable weights enclosed in a container suspended from a frame that is rigidly installed inside the floating base. The container is operably coupled to a sheave, via a crank. The movement of the adjustable weights in the container results in the movement of a sheave that is operably coupled to an output shaft that is in turn coupled to an electric generator via a network of gears. The generator supplies power to an electrolyzer producing hydrogen and oxygen from water. The hydrogen and oxygen are compressed into gas or liquid and stored in containers on-board the floating base, until they are off-loaded at a facility.
    Type: Grant
    Filed: August 25, 2018
    Date of Patent: April 9, 2019
    Inventors: Vladimir Shepsis, Leo Shepsis, Aleksandra Shepsis
  • Patent number: 10233894
    Abstract: An artificial reef to be anchored to the seabed comprises two or more juxtaposed conduits which are positioned in parallel with the direction of wave propagation. Both conduits include directrices. The upper conduit includes directrices which drive the flow of the wave's crest, and the lower conduit includes directrices which drive the water diverging from the apertures in the area under the wave's trough. The upper and lower conduits are hydraulically connected, each connection comprising a shut-down valve associated with a useful energy-generating unit.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: March 19, 2019
    Assignee: UNIVERSIDADE DE COIMBRA
    Inventor: José Paulo Pereira De Gouveia Lopes De Almeida
  • Patent number: 10151293
    Abstract: This invention relates to an energy transfer arrangement of a wave energy recovery apparatus comprising at least a base, a reciprocating panel, supporting legs and a pivot shaft for the reciprocating panel, and a driving and power-take-off arrangement equipped with an actuating mechanism and one or more power-take-off units to convert kinetic energy of waves or tidal currents to another type of energy, each PTO unit comprising a power transmission mechanism. The actuating mechanism is arranged to transfer the reciprocating motion of the panel mechanically to a linear motion of the power transmission mechanism of each PTO unit.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: December 11, 2018
    Assignee: AW-ENERGY OY
    Inventors: Sami Pasanen, Jussi Åkerberg, Arvo Järvinen
  • Patent number: 10082127
    Abstract: A wave energy convertor for extracting energy from ocean waves. The wave energy convertor may include a buoy arranged to oscillate relative to a reference point about an equilibrium position and a negative spring device connected between the buoy and the reference point, wherein the negative spring device is for applying a positive force in the direction of displacement when the buoy moves away from the equilibrium position.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: September 25, 2018
    Assignee: Norweigian University of Science and Technology
    Inventor: Jørgen Hals Todalshaug
  • Patent number: 10082128
    Abstract: A power generator comprises a casing (110) that in use is deployed in an environment in which the casing is subjected to an excitation motion such as wave motion. A series of masses (101, 103a-c) is located within the casing, wherein at least a first mass is coupled to the casing by a first spring (102), each of the masses is coupled to at least one adjacent mass by a respective spring, and wherein the casing and the series of masses bring a motion of the power generator into resonance with the excitation motion. A plurality of electric machines each comprising a stator and a field source are each associated with a corresponding mass such that a relative motion of a mass and associated electric machine generates electrical power. A power takeoff circuit receives generated electrical power from the plurality of electric machines and outputs electrical power from the power generator.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: September 25, 2018
    Assignee: DDNT Consultants Australia Pty Ltd.
    Inventors: Dalibor Frtunik, George Brawley
  • Patent number: 10077810
    Abstract: A sensor hub for use in machine condition monitoring comprising a rotation sensor and a wireless communication module each operatively connected to a processing device. The rotation sensor and processing device are configured to receive power from a controller of the monitored machine. One or more additional sensors, which may be associated with the monitored machine or another machine, may also be operatively connected to the processing device. In an embodiment, the additional sensors may comprise any one or more of, or any combination of, an accelerometer, a temperature sensor, an acoustic sensor, an high frequency sensor, an humidity sensor, a barometric pressure sensor, a current sensor or a proximity sensor. The wireless communication module may support an ad hoc wireless communication protocol. Further, the wireless communication module may receive additional sensor data from one or more wireless sensor nodes associated with the monitored machine or another machine.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: September 18, 2018
    Assignee: Dynapar Corporation
    Inventors: Mark Edward Langille, Kirk Alan Mitchell, Erik John Brewster, Abhishek Sumeet Jadhav, Ferran Alberto Ayala, Scott Thomas Benigni
  • Patent number: 10069441
    Abstract: An electric energy scavenger device has a housing forming an internal chamber with an internal wall, and a movable element contained within the internal chamber. The movable element is freely movable and unconnected to any other movable element within the internal chamber. Within the internal chamber, the device also has a plurality of piezoelectric charge conversion elements positioned along the internal wall. The plurality of piezoelectric charge conversion elements are positioned side-by-side to contact the movable element when the movable element moves within the internal chamber. In addition, the movable element is configured to simultaneously contact at least two of the plurality of side-by-side piezoelectric charge conversion elements. During use, the movable element is freely movable within the internal chamber in response to movement of the entire housing.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: September 4, 2018
    Assignee: Analog Devices, Inc.
    Inventors: Yingqi Jiang, Qian Zhang, Kuang L. Yang
  • Patent number: 10047718
    Abstract: An electrical generation system based on tidal flow includes a reservoir and a fluid inlet tube extending between a tidal source and the reservoir. The inlet tube has at least one inlet turbine generator disposed therein. The fluid inlet tube extends along a first level. A fluid outlet tube extends between the reservoir and the tidal source. The fluid outlet tube has at least one outlet turbine generator disposed therein. The fluid outlet tube extends along a second level vertically lower than the first level. During high tide at the tidal source, tidal fluid flows from the tidal source, into the fluid inlet tube, past the at least one inlet turbine generator, and into the reservoir and during a low tide at the tidal source, the tidal fluid flows from the reservoir, into the fluid outlet tube, past the at least one outlet turbine generator, and to the tidal source.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: August 14, 2018
    Assignee: Tidal Fan, LLC
    Inventor: Bradley Smith
  • Patent number: 10004995
    Abstract: A percussion instrument comprising an energy harvesting device is disclosed, embodiments take the form of a percussion shaker and a drum, various implementations are disclosed for harvesting kinetic energy from motion imparted to the instrument and converting it to electrical energy for later use and for transfer to an external device.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: June 26, 2018
    Assignee: BISH BASH PRODUCTIONS LTD.
    Inventor: Sudha Kheterpal
  • Patent number: 9951747
    Abstract: The invention relates to extracting kinetic energy from surface waves. Therein, at least one float (8) is kept floating in the area of the surface waves, while a working fluid is held in a reservoir structure (2, 3). The float is connected to a fluid displacement structure in such manner that an individual surface wave, which causes an upward stroke of the float, moves the working fluid within the reservoir structure in such manner that the potential energy of the working fluid is increased. Before the wave has reached the float, the wave is detected by a sensor (7). Based on said detection, a prediction is calculated of the amount of kinetic energy available in the wave. Tuned to said prediction, an energy transmission structure of the fluid displacement structure is adjusted for realizing the energy conversion.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: April 24, 2018
    Assignees: RIJKSUNIVERSITEIT GRONINGEN
    Inventor: Wouter Adrianus Prins
  • Patent number: 9945349
    Abstract: A closed-loop hydraulic apparatus 200 for converting wave energy comprises a pump 201 for pumping a fluid through the apparatus 200. The pump 201 includes a body 202 defining a chamber 203, and a piston 207 that partitions the chamber 203 into a working side 208 and a blind side 209. A buoyant actuator is connected to the piston 207. An inlet 64 is connected to the working side 208 of the chamber 203 so that the fluid is able to flow from the inlet 64 and into the working side 208 of the chamber 203. An outlet 63 is connected to the working side 208 of the chamber 203 so that the fluid is able to flow from the working side 208 of the chamber 203 to the outlet 63. A hydraulic controller 102 is operable to control the pump 201 by controlling the pressure of the fluid at the inlet 64 and the outlet 63 so as to optimise the output of the pump 201 in response to tidal variations and/or sea state. The pressure of the fluid at the inlet 64 and the outlet 63 is controlled in accordance with a control algorithm.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: April 17, 2018
    Assignee: CETO IP Pty Ltd.
    Inventors: Greg John Allen, Ruud Caljouw, Jonathan Pierre Fievez, David Kessel, Nigel Laxton, Laurence Drew Mann
  • Patent number: 9909554
    Abstract: A device and a method for converting wave motion energy into electric power are described. The device includes at least one support structure and a support frame to connect the floating element to the support structure. A linear element of motive power mounted on the support frame is movable with respect to the floating element and transfers motion to a motion conversion and transmission unit that converts linear motion into rotary motion, which drives kinetic energy accumulation elements and one or more electric power generators. The motion conversion and transmission unit, the kinetic energy accumulation elements and the electric power generators are all incorporated in the floating element.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: March 6, 2018
    Inventors: Federico Ghiringhelli, Giuseppe Andrea Varlonga
  • Patent number: 9847739
    Abstract: An autonomous intracorporeal capsule comprises a body containing electronic circuits and an energy harvesting module. The energy harvesting module comprises a moveable surface on the body of the capsule, subjected to pressure variations and to produce a mechanical stress under the effect of the pressure variations, and a transducer comprising a deformable piezoelectric component configured as a beam adapted to be forced to bend. The piezoelectric component has a recessed end integral with the capsule and a free end. A mechanical connection couples the free end of the piezoelectric component to the actuator. The mechanical connection may provide a degree of freedom in rotation between a main direction of the beam and the direction of application of the mechanical stress.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: December 19, 2017
    Assignee: Sorin CRM S.A.S.
    Inventors: Martin Deterre, Elie Lefeuvre
  • Patent number: 9847697
    Abstract: A device and method for generating electric energy/power from a wave motion. The device comprises an input branch connected to a movable element, a secondary branch connected to a main electric generator, a power split transmission comprising a first mechanical port connected to the input branch, and a second mechanical port connected to a secondary branch, and a third port being a mechanical or electrical control port. The device further comprises a variable speed auxiliary electrical machine connected to the control port for mechanically or electrically controlling power distribution in the power split transmission. The device further comprises a control unit adapted for controlling the variable speed auxiliary electrical machine in such a way as to realize a one-way rotation of the main electric generator.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: December 19, 2017
    Assignee: UNIVERSITEIT GENT
    Inventors: Joris Degrieck, Wim Van Paepegem
  • Patent number: 9810194
    Abstract: The present invention is directed to a wave activated power generating device that incorporates a support frame; a buoy vertically positioned to rise and fall relative to motion of waves impacting the buoy and the support frame, the buoy being formed with a hollow interior space; a rack and pinion structure operatively connected between the buoy and the support frame such that a pinion element of the rack and pinion structure generates rotating torque by moving along the rack element in response to the buoy rising and falling by the wave motion; and a power generator unit operative connected to the rack and pinion structure to generate electricity in response to rotating torque generated by the pinion element. The rack structure is fixedly connected to at least one vertical surface inside the hollow interior space of the buoy.
    Type: Grant
    Filed: December 21, 2013
    Date of Patent: November 7, 2017
    Inventor: Tsukasa Nozawa
  • Patent number: 9790913
    Abstract: A wave energy converter (WEC) buoy includes at least one pitch-driven WEC (“PDWEC”) device. Each PDWEC device includes two reaction masses which are placed at diametrically opposite ends of a container designed to float along the surface of a body of water and to move in response to the pitching motion of the waves. The reaction masses are interconnected so that when one reaction mass moves up, the diametrically opposed reaction mass moves down, and vice-versa. The movement of the reaction masses drives power take off (PTO) devices to produce useful energy. The reaction masses may be interconnected by any suitable linking system. One or more PDWEC device may be combined with a heave responsive device to produce a WEC buoy which can produce a power output in response to pitch or heave motion.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: October 17, 2017
    Assignee: Ocean Power Technologies, Inc.
    Inventor: David B. Stewart
  • Patent number: 9784237
    Abstract: An improved ocean wave energy extraction system is disclosed. The system includes at least one duct for receiving an oscillating water column. The duct has a first segment, a second segment arranged transversely to the first segment and a flow control segment intermediate the first and second segments. The flow control segment is configured to inhibit turbulent flow of the oscillating water column flowing within the duct. A turbine is in fluid communication with the second segment of the duct such that the turbine is driven by the fluid flow which is generated by the oscillations of the oscillating water column within the duct. The turbine rotates an electric generator to thereby generate electrical energy.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: October 10, 2017
    Inventors: Tom Denniss, Scott Hunter
  • Patent number: 9776136
    Abstract: Some embodiments of the present disclosure include a water purification system for producing purified water from a body of water. The water purification system may include a floating platform having a ramp extending from an edge thereof at a downward angle into the body of water, a primary impoundment area extending from a top portion of the ramp onto the floating platform, a pair of sub-impoundment areas attached to an end of the primary impoundment area distal from the ramp, at least one hydraulic cylinder and at least one accumulator attached to the sub-impoundment areas, and a nanofiltration system operatively attached to the at least one hydraulic accumulator. Water may be configured to flow from the body of water onto the ramp and through the system, exiting the nanofiltration system as purified water.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: October 3, 2017
    Inventor: Brian K. Meano, Sr.
  • Patent number: 9771921
    Abstract: A free floating wave energy converter includes a flexible pine and an inlet. The flexible pipe floats on water surface, following the wave form. Slugs of water and air enter, one after the other, through the inlet. Because the flexible pipe follows the shape of the wave, water is transported through a manifold to a pressure chamber connected to a generator. The inlet consists of hollow, inflexible pipe attached to the throat of the flexible pipe. The inflexible pipe is fixedly attached to a buoyancy tank or plurality thereof. The buoyancy tanks are arranged in a vertical plane or in tandem, with the inflexible pipe passing along the plane vertical to the fore and aft axis of the buoyancy tank and the frontward portion projecting sufficiently ahead of the buoyancy tank with the flexible pipe terminating at a singular outlet.
    Type: Grant
    Filed: July 20, 2012
    Date of Patent: September 26, 2017
    Inventor: Syed Mohammed Ghouse
  • Patent number: 9735651
    Abstract: An energy production device including a frame, a body, first and second aligned input shafts projecting from two opposite faces of the body, and a third input shaft aligned with an output shaft. The direction of the first and second input shafts is perpendicular to the direction of the third input shaft and of the output shaft. A mechanical connection is provided at the proximal part of each of the shafts which is within the body. The mechanical connection operates with a transmission system within the body so that any rotation movement on any of the input shafts is converted into a unidirectional rotation movement on the output shaft. A distal end of the third input shaft is fixed to the frame. A bearing is fixed on the frame, into which the distal end of the output shaft is freewheeling.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: August 15, 2017
    Inventor: Martin John Wickett