Tide Or Wave Motor Patents (Class 417/330)
  • Patent number: 10428786
    Abstract: The active water hydroelectric system uses a hydraulic ram pump to increase pressure to turbine blades using water from a low head water source, the system comprising a housing, drive pipe, delivery pipe, pressure vessel, turbine, waterwheel, and first and second generators. The drive pipe is fluidly coupled to the low head water source and pressure vessel. A primary flow moves across a turbine turning a first generator. Primary and secondary flows turn the waterwheel which turns the second generator. The passive hydroelectric system a floatation device such as a ship or barge. A vertical siphon pipe and vector siphon pipe comprise a siphon mechanism that delivers water to the hydraulic ram pump. A primary flow of water flows from the pump to a drive pipe to the turbine. Primary and secondary flows of water turn the waterwheel. Water exits through an exit pipe.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: October 1, 2019
    Inventor: Richard M. Navarro
  • Patent number: 9863395
    Abstract: An ocean wave energy converter (WEC) using one or more elongated light-weight low-cost surface floats, oriented and self-orienting parallel to oncoming wave fronts are mechanically linked to a motion stabilized or fixed frame or base through one or more power take-offs in such manner that multi-directional rotational and translational wave-induced forces and relative motion between the float(s) and base are efficiently captured. Some embodiments have at least one forward positioned float that moves upward and rearward on wave crests and downward and forward on ensuing wave troughs to capture a majority of both heave and surge wave energy components. Other embodiments also provide apparatus and means to totally submerge the floats during severe seas or adjust submerged depth and float mass to optimize performance.
    Type: Grant
    Filed: November 1, 2014
    Date of Patent: January 9, 2018
    Assignee: Rohrer Technologies, Inc.
    Inventor: John W. Rohrer
  • Patent number: 9797367
    Abstract: A wave energy converter (WEC) 10 has a body portion 18 with a face 20 and at least one flexible membrane 16 bounding at least part of a volume of a fluid to form a variable volume cell 22. The membrane is inclined from vertical providing a flow smoothed passage for wave energy from a wave 14 to travel over the WEC whilst deforming the at least one membrane towards the body to compress the fluid. The cell(s) can be submerged or floating. The inclination of the at least one membrane assists conversion of potential and kinetic energy of the wave to pressure within the fluid. Fluid pressure within the WEC cell(s) and/or system can be optimised to suit wave and/or performance conditions.
    Type: Grant
    Filed: February 13, 2015
    Date of Patent: October 24, 2017
    Assignee: Bombora Wave Power Pty Ltd
    Inventors: Glen Lee Ryan, Shawn Kay Ryan
  • Patent number: 9739257
    Abstract: A wave energy extraction device (or paddle) for converting wave energy into mechanical motion is curved in the horizontal plane, with a concave side (11) facing the incoming waves to increase energy capture and a convex side (12) on the lee side to reduce energy dissipation. The concave surface is substantially parabolic or semi-elliptical and the convex side is optionally provided with a substantially Gaussian profile (4) to improve the hydrodynamics and provide additional strength. To simplify connection to a base platform the paddle curvature optionally tapers to a straight edge (1) at the mounting points and the base device can be located either above or below the water surface. One embodiment is also curved about a vertical as well as the horizontal plane to create a spoon- or cup-shaped paddle (9).
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: August 22, 2017
    Assignee: Zyba Renewables Limited
    Inventor: William John Douglas Bateman
  • Patent number: 9644600
    Abstract: A power generation apparatus for underwater power generation including at least two balloons completely submerged under a water surface of a water body, wherein a first balloon is filled with a gas and a second balloon is initially empty, a first and a second flexible hose, a plurality of hose reels, a plurality of pulleys, a cord connecting the first balloon and the second balloon, a pump connected to the first flexible hose and the second flexible hose in an airtight manner, a first valve, a second valve, at least two pressure sensors and at least two flow rate sensors, a generator. The apparatus further includes a power controller that reads data from the at least two pressure sensors and the at least two flow rate sensors to control the opening of the first valve, the second valve, and a pumping direction of the pump.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: May 9, 2017
    Inventor: Fahd Nasser J Aldosari
  • Patent number: 9017042
    Abstract: A multi-stage pump system for use in desalination systems including a first stage S1 providing low pressure for priming the system a second stage S2 that is in fluid communication with the first stage and is primed by the low pressure from the first stage. The second stage S2B includes at least one reciprocating piston 122, in an enclosing cylinder 121, 121A and is attached to the two second flexible inflatable bladders 123. The piston 122 will move up and down within the cylinder 121 121A relative to the movement of the two second stage flexible bladders 123 due to priming by the first stage affecting their buoyancy. The driving fluid then passes into a passage 130 and is expelled to an outlet and Stage three (S3) at higher pressure when the first reciprocating member 122 proceeds through a complete stroke.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: April 28, 2015
    Inventor: Rob Frazer
  • Publication number: 20150104332
    Abstract: An adaptive hydraulic pressure generator is provided for systems in which the mechanical force producing energy varies significantly, especially for wave energy systems. The pressure generator includes at least two fluid chambers with a piston surface/displacement surface arranged to reciprocate with the fluid chamber, whereby the piston surface/displacement surface acts on the fluid in the chamber by means of the said mutual reciprocating movement. The pressure generator is equipped with a control system which is arranged to connect the chambers to each other and/or to different pressure ducts in such a way that the effective area of the piston/displacement surfaces changes in accordance with the changes in the driving force exerted on the piston/displacement surfaces and/or the body forming the fluid chamber in such a way that the pressure produced by the pressure generator in the fluid supplied to the application exceeds the threshold pressure.
    Type: Application
    Filed: March 20, 2013
    Publication date: April 16, 2015
    Inventors: Olof Calonius, Juha Elonen, Heikki Eskonen, Jyrki Kajaste
  • Patent number: 8974192
    Abstract: An apparatus utilizing wave energy to capture ocean water and send it to shore for hydroelectricity, hydrodynamic energy conversion or desalination. The submerged device is located offshore and is preferably oriented orthogonal to the shoreline or the incoming water surges. Responding to underwater wave surges, a deformable bladder filled with sea water is compressed and the seawater contained therein is expelled and sent to shore. A one-way valve responds to the differential in water pressure inside the empty bladder as compared to outside the bladder and permits seawater to enter and refill the bladder. The bladder may have any of several forms including that of a bellows. The present invention discusses several ways by which the bladder may be compressed and several ways by which it can sense and respond to underwater wave surges.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: March 10, 2015
    Inventor: Gary Ross
  • Patent number: 8863511
    Abstract: This is a low-cost, ingenious, high-efficiency energy producing system from hydrokinetic energy in water waves, currents and tides. Cost advantages are due to the use of existing bridge structures to mount the water energy converter to withstand fierce wind and water forces.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: October 21, 2014
    Inventor: Paul M Swamidass
  • Patent number: 8668472
    Abstract: A pumping apparatus for harvesting the wave energy and converting such energy into hydraulic power which may be transmitted and used to generate electricity or to produce desalinated water. The pumping apparatus has a float, an accumulator pressurized above the ambient pressure of the pump, the accumulator is charged with fluid and the pump is full of fluid. A check valve is closed and a pumping chamber is pressurized. An additional pumping chamber is also equally pressurized. An axial force is generated on a first tube by the pressure difference between its ends. An opposite axial force is generated on a second tube by the pressure difference between its ends. The second tube is larger in diameter than the first tube and hence the magnitude of the force on the second tube is greater. The resultant of these forces is balanced by a portion of the buoyancy of float.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: March 11, 2014
    Inventor: Robert Tillotson
  • Patent number: 8622719
    Abstract: A hydraulic pump unit includes a cylindrical member that is fit into an outer circumference of the main shaft and a hydraulic pump body arranged on an outer circumferential side of the cylindrical member. The hydraulic pump body includes a ring cam mounted on the outer circumference of the cylindrical member, a pump bearing, a pump housing, a plurality of pistons housed in the pump housing and actuated by the ring cam, and a plurality of cylinders which guide the plurality of pistons in a radial direction and are arranged in a circumferential direction. The hydraulic pump unit is configured such that the pump unit is insertably fixed to the main shaft by the cylindrical member.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: January 7, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kazuhisa Tsutsumi, Noguchi Toshihide, Yasuhiro Korematsu, Masayuki Shimizu, Alasdair Robertson, Uwe Stein, Hauke Karstens
  • Patent number: 8480381
    Abstract: Apparatus (10) for harnessing ocean wave energy and for converting the harnessed energy to high pressure sea water, typically above 100 psi and preferably above 800 psi. The high pressure seawater generated by the apparatus (10) can be piped to shore for use in any appropriate purpose. The apparatus (10) comprises a float (12) buoyantly suspended within the body of seawater (1) and a pump (13) operatively connected to the float (12). The pump (13) comprises an intake chamber (47), a discharge chamber (49) and a piston (61) extending between the intake and discharge chambers (47, 49). The piston (61) comprises a tube (63) having a flow passage (102) extending between the intake and discharge chambers (47, 49). The piston (61) and discharge chamber (49) cooperate to define a pumping chamber (100) adapted to undergo expansion and contraction in response to reciprocatory motion of the piston. The piston (61) is operatively connected to the float (12) to be driven by upward movement of the float.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: July 9, 2013
    Assignee: CETO IP Pty Ltd.
    Inventor: Alan Robert Burns
  • Patent number: 8348636
    Abstract: A wave energy converter for compressing air from the movement of waves of a body of water is provided. The wave energy converter includes a middle cylinder upon which an upper cylinder slides thereon and in which a lower cylinder slides therewithin. An upper and lower compression chamber disposed within the upper and lower cylinders allows air to be drawn therewithin and compressed when the upper and lower cylinders are moved relative to the middle cylinder as waves progress through their wavelength from crest to trough and vice versa.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: January 8, 2013
    Inventor: Terry L. Spidell
  • Publication number: 20120299303
    Abstract: A wave energy converter (10) for extracting energy from waves in a body of liquid. The converter (10) comprises an inflatable sleeve (12) having an air inlet (14) at or towards one end and an air outlet (18) at or towards its other end. A flexible diaphragm (22) is located within the sleeve (12) so as to extend lengthwise thereof. The diaphragm (22) is sealingly engaged with the sleeve (12) along opposed, elongate edges (22a,22b) thereof. A flexible spine (24) is retained within the diaphragm (22) so as to extend lengthwise thereof. The spine (24) is fixed with the diaphragm (22), relative to the sleeve (12), at or towards each end of the sleeve (12). The converter (10) also comprises a loading device operable to apply an axial compressive force to the spine (24) relative to the sleeve (12) such that, on operation of the loading device, the spine (24) and the diaphragm (22) are buckled into a waveform (26) constrained within the sleeve (12).
    Type: Application
    Filed: November 3, 2010
    Publication date: November 29, 2012
    Inventors: Norman West Bellamy, Neil Michael Bellamy, Robert Ian Smith
  • Publication number: 20120251349
    Abstract: A primary piston that is connected to a secondary piston that is part of a compressor, primary and secondary piston are connected by a connecting rod, the primary piston is driven by the pressure and vacuum produced by a pressure chamber that is driven by the variation of the sea waves. The output of the compressor is applied to a pressure tank, and then the out put flow is controlled and applied to the turbine.
    Type: Application
    Filed: March 28, 2011
    Publication date: October 4, 2012
    Inventor: Israel Ortiz
  • Publication number: 20120187689
    Abstract: A wave energy conversion apparatus comprises:-a mechanical element arranged in operation to move repeatedly in a cycle in response to wave motion, wherein the speed of the mechanical element varies between a maximum and a minimum during each cycle; power extraction means arranged to extract energy from the movement of the mechanical element; and movement assistance means arranged to assist the movement, in response to the wave motion, of the mechanical element, during at least one part of the cycle during which the speed of movement of the mechanical element is substantially equal to the minimum for that cycle, wherein the power extraction means comprises a fluid pressurisation system that is arranged so that in operation fluid in the fluid pressurisation system is pressurised in response to movement of the mechanical element, the fluid pressurisation system comprises a one-way valve for transferring pressurised fluid from the fluid pressurisation system and the movement assistance means is located upstream o
    Type: Application
    Filed: July 22, 2010
    Publication date: July 26, 2012
    Applicant: Aquamarine Power Limited
    Inventor: Michael David Crowley
  • Publication number: 20120063929
    Abstract: An object of the present invention is to provide a hydraulic pump structure which improves the ease of mounting the hydraulic pump on the main shaft, and a method of mounting the hydraulic pump which can be performed in a simplified manner. A hydraulic pump unit 10 is formed by unitizing a cylindrical member 46 fit into an outer circumference of the main shaft 12 and a hydraulic pump body 76 arranged on an outer circumferential side of the cylindrical member 46. The hydraulic pump body 76 comprises a ring cam 52 mounted on the outer circumference of the cylindrical member 46, a pump bearing 54, a pump housing 34, a plurality of piston 58 housed in the pump housing 34 and actuated by the ring cam, and a plurality of cylinders 60 which guide the plurality of pistons in a radial direction and are arranged in a circumferential direction, and the hydraulic pump unit 10 is configured such that the pump unit 10 is insertably fixed to the main shaft 12 by the cylindrical member 46.
    Type: Application
    Filed: November 30, 2010
    Publication date: March 15, 2012
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Kazuhisa Tsutsumi, Toshihide Noguchi, Yasuhiro Korematsu, Masayuki Shimizu, Alasdair Robertson, Uwe Stein, Hauke Karstens
  • Patent number: 8118569
    Abstract: A hydraulic power device is provided. The hydraulic power device includes: a first cylinder with a cylindrical chamber, a first fluid inlet, a first fluid outlet, and a weight unit having a first piston. The first piston hermetically fits into the first cylinder and moves upwards and downwards within the first cylinder. When the first piston moves downwards within the first cylinder, the fluid in the cylindrical chamber flows out through the first fluid outlet under the pressure from the first piston, and thereby generates hydraulic power. When the first piston moves upwards within the first cylinder, the fluid flows into the cylindrical chamber through the first fluid inlet, to get prepared for subsequent hydraulic power output. The hydraulic power device in the present invention is designed to lift a weight unit with a small initial power and then generate hydraulic power utilizing the gravity of the weight unit.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: February 21, 2012
    Inventor: Chun Kwan Yu
  • Publication number: 20120019009
    Abstract: A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control.
    Type: Application
    Filed: August 25, 2011
    Publication date: January 26, 2012
    Applicant: LightSail Energy Inc.
    Inventors: Danielle A. FONG, Stephen E. Crane, Edwin P. Berlin, JR., AmirHossein Pourmousa Abkenar, Kartikeya Mahalatkar, Yongxi Hou, Todd Bowers
  • Patent number: 8099955
    Abstract: The invention herein proposed describes a plant operated by the movement of floaters (A) connected to horizontal arms (B). These arms (B) move hydraulic pumps (C), which inject water into the hyperbaric chamber (E). This chamber (E) supplies water through an outflow control valve, to set in motion a conventional turbine (G) that connected to electric generator supplies electricity.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: January 24, 2012
    Assignee: COPPE/UFRJ—Coordenacao dos Programas de Pos Graduacao de Engenharia da Universidade Federal do Rio de Janeiro
    Inventors: Segen Farid Estefen, Paulo Roberto Da Costa, Marcelo Martins Pinheiro
  • Patent number: 8102068
    Abstract: A buoyant hydro turbine(31) for capturing and utilizing energy in the currents of flowing water. A driven component(33) produces electricity or other energy is coupled to and supported by a buoyant rotor(64), increasing efficiency and eliminating the need for an independent supporting structure. Tethered in flowing water, the current(71) rotates the rotors(32) and transfers rotatable energy to the central driven component(33) where electricity or other mechanical work is produced. A number of embodiments are adapted for optimizing and maintaining positioning in a stream of moving water. Additional embodiments optimizing the efficiency and effectiveness of the turbine in capturing and utilizing the current's kinetic energy as well as hydrostatic pressure.
    Type: Grant
    Filed: March 3, 2009
    Date of Patent: January 24, 2012
    Inventor: Brent Lee Gutekunst
  • Patent number: 8097150
    Abstract: A wave energy conversion system includes a barge support frame having a frame superstructure and a plurality of frame support legs selectively extendable from the frame superstructure, a barge carried by the barge support frame and at least one wave energy conversion pump comprising a water transfer conduit carried by the barge support frame and having a filter port and an inner water transfer space disposed in fluid communication with the filter port, a pressure conduit mounted for displacement on the water transfer conduit and having an outer water transfer space disposed in fluid communication with the inner water transfer space and a buoyancy vessel carried by the pressure conduit. Also disclosed are a power generation pumping system and a river or stream fed system having tanks to contain and pressurize water to a force sufficient to drive turbine generators for electric power production and potable water use.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: January 17, 2012
    Inventors: Dwight Francis Houser, Dwight F. Houser, II, Mattew J. Houser
  • Publication number: 20110280739
    Abstract: A pump assembly comprises a first piston near a lower end of a coiled water and/or other condensed liquid discharge conduit, which is actuated by second and third pistons that are arrange at the upper and lower ends of a hydraulic or pneumatic fluid conduit, wherein the third piston is connected to a floating body, which is oscillated by waves, such that a pair of one way check valves suck and push production water and other condensed liquids sequentially from a lower region of the well into a lower portion and subsequently into an upper portion of the coiled water and other condensed liquid outlet conduit.
    Type: Application
    Filed: December 23, 2009
    Publication date: November 17, 2011
    Inventor: Lubbertus Lugtmeier
  • Patent number: 7980832
    Abstract: A stationary structure is mounted on the floor of an ocean or other body of water subject to wave motion. The structure provides a floatation body that moves with the waves and is able to drive a sealing plate in a compression chamber. When the water level changes, or wave action magnitude changes, a second sealing plate is able to move automatically to maintain a constant size of the compression chamber. Air compressed in the chamber is let into a tank to maintain a constant elevated pressure in the tank and the air pressure is used to power a turbine to generate electricity. In an alternate embodiment, a mechanical linkage drives the turbine directly.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: July 19, 2011
    Inventor: Ned M. Ahdoot
  • Patent number: 7969033
    Abstract: A device for the generation of energy and in particular electrical energy includes a cell or chamber which moves upwardly and downwardly in a body of water. Cog wheels are connected to the cell. The cog wheels are connected to the shafts of generators. Rotation of the cog wheels operates the generators which produce energy. The cog wheels engage anchor chains or vertical supports. One end of each anchor chain is secured to an anchor located at the bottom of the body of water. The other end of the anchor chain is secured to a float which floats at or near the surface of the body of water. The up and down movement of the cell causes the cog wheels to move upwardly and downwardly along the anchor chains and thereby rotate. This rotation drives the energy generator and generates energy, preferably electricity. The cog wheels are permitted to rotate upon the receipt of a request for energy. This results in a highly efficient source of energy or electricity.
    Type: Grant
    Filed: May 8, 2009
    Date of Patent: June 28, 2011
    Inventor: James Ryan
  • Patent number: 7963111
    Abstract: The invention relates to a method for generating energy from an undulating movement of a medium such as seawater, comprising of following the movement of the medium, wherein a direction of movement of the movement changes at a point in time, converting the followed movement into energy, interrupting the following of the movement for an interruption period close to the point in time, wherein conversion of energy comprises of pumping a fluid with the followed movement by feeding and discharging said fluid.
    Type: Grant
    Filed: November 10, 2005
    Date of Patent: June 21, 2011
    Inventors: Zakaria Khalil Doleh, Rany Zakaria Doleh, John Douglas Lock
  • Patent number: 7948107
    Abstract: An energy conversion system comprising a support structure upstanding within a volume of water subject to the occurrence of both wave motion and tidal flow, a first apparatus mounted from the support for deriving usable power from the tidal flow, and a second apparatus operationally supported relative to the support structure for deriving usable power from the occurrence of wave motion independently from that derived from tidal flows and power transfer apparatus for facilitating the transfer of such usable powers to a land based location, or for making some alternative use of such power elsewhere.
    Type: Grant
    Filed: October 18, 2006
    Date of Patent: May 24, 2011
    Assignee: Marine Current Turbines Limited
    Inventor: Peter L. Fraenkel
  • Publication number: 20110067641
    Abstract: A method and apparatus for pumping deeper water from a large body of water to an upper portion thereof using wave energy, thereby increasing nutrients at said upper portion and thus the fish populations thereof.
    Type: Application
    Filed: May 18, 2009
    Publication date: March 24, 2011
    Applicant: ATMOCEAN, INC.
    Inventor: Philip W. Kithil
  • Patent number: 7911073
    Abstract: A system and method for generating electricity using a hydro-hydraulic gravitational generator. In such a system, a main housing that is disposed in deep water may be exposed to deep water pressure. A piston disposed in the main housing may be raised as water enters the main housing. Water passing through water turbines generate electricity in this phase. After the piston is raised to its highest point within the main housing, the main housing may be exposed to atmospheric pressure such that the gravitational force on the piston expels the water that was just drawn in. The expelling water also may generate electricity by being passed though water turbines. The cycle may be repeated and electricity may be continuously generated.
    Type: Grant
    Filed: October 8, 2008
    Date of Patent: March 22, 2011
    Inventor: Todd Smith
  • Publication number: 20110027107
    Abstract: Power plant comprising: a lower level reservoir, a feed-through (line, hose, pipe, channel) for fluid communication from the lower level reservoir to a higher level reservoir, characterised by a pump arranged in connection with the feed-through in order to pump water from the lower level reservoir to the higher level reservoir in order to store energy by emptying the lower level reservoir, and a turbine/generator for power production arranged in or at the lower level reservoir in connection with said feed-through, or additional feed-through, for fluid communication between the lower level reservoir and the higher level reservoir for power production during flow of water from the higher level reservoir to the lower level reservoir. A method for power production. Use of the power plant.
    Type: Application
    Filed: March 26, 2009
    Publication date: February 3, 2011
    Applicant: STATOIL ASA
    Inventor: Bjørn Bekken
  • Publication number: 20110008178
    Abstract: A wave energy converter for compressing air from the movement of waves of a body of water is provided. The wave energy converter includes a middle cylinder upon which an upper cylinder slides thereon and in which a lower cylinder slides therewithin. An upper and lower compression chamber disposed within the upper and lower cylinders allows air to be drawn therewithin and compressed when the upper and lower cylinders are moved relative to the middle cylinder as waves progress through their wavelength from crest to trough and vice versa.
    Type: Application
    Filed: July 13, 2009
    Publication date: January 13, 2011
    Inventor: Terry L. Spidell
  • Publication number: 20100226798
    Abstract: A completely submersed means of extracting energy from a tidal flow is particularly adapted to pump water to be stored and used around tidal change periods or to stabilize the output of offshore windmills. It can be retrieved and brought to the surface for maintenance and also repositioned on the sea bed, by remote control. Operation of its reaction means is automatically limited to prescribed water depths.
    Type: Application
    Filed: January 23, 2007
    Publication date: September 9, 2010
    Inventor: William Kingston
  • Publication number: 20100219065
    Abstract: Apparatus (10) for harnessing ocean wave energy and for converting the harnessed energy to high pressure sea water, typically above 100 psi and preferably above 800 psi. The high pressure seawater generated by the apparatus (10) can be piped to shore for use in any appropriate purpose. The apparatus (10) comprises a float (12) buoyantly suspended within the body of seawater (1) and a pump (13) operatively connected to the float (12). The pump (13) comprises an intake chamber (47), a discharge chamber (49) and a piston (61) extending between the intake and discharge chambers (47, 49). The piston (61) comprises a tube (63) having a flow passage (102) extending between the intake and discharge chambers (47, 49). The piston (61) and discharge chamber (49) cooperate to define a pumping chamber (100) adapted to undergo expansion and contraction in response to reciprocatory motion of the piston. The piston (61) is operatively connected to the float (12) to be driven by upward movement of the float.
    Type: Application
    Filed: August 17, 2006
    Publication date: September 2, 2010
    Applicant: SEAPOWER PACIFIC PTY LTD.
    Inventor: Alan Robert Burns
  • Publication number: 20100219640
    Abstract: Systems, processes, and techniques for harnessing the dynamic energy of a fluid body may be used to generate electric power. In particular implementations, harnessing the dynamic energy of a fluid body may include the ability to follow movements of a fluid body and pressurize a volume of fluid due to following the movement. The pressurized volume of fluid may be used, at least in part, to drive an electrical power generator.
    Type: Application
    Filed: August 11, 2009
    Publication date: September 2, 2010
    Inventor: Fernando Gracia Lopez
  • Publication number: 20100126160
    Abstract: In a method for converting fluctuating energy into a stable energy supply, the fluctuating energy is derived from the group of solar energy, wind power, waves or water currents, this energy being delivered to a first pump being integrated in a pressure circuit for delivering stable energy and the pressure circuit comprising a pressure amplifier with a double-cone device being driven by the liquid flow circulated by the first pump. This allows the stabilisation of fluctuating energy to be used e.g. in desalination plants without supplemental storage energy and without reverting to electric current conversion.
    Type: Application
    Filed: March 6, 2007
    Publication date: May 27, 2010
    Inventor: John Stark
  • Publication number: 20100032950
    Abstract: A device for a wave-powered generator which is provided with at least one energy generator and lines for transferring energy to a consumer, the wave-powered generator comprising a main module provided with a running rod which is substantially vertical in its longitudinal extent, several supporting devices arranged around a portion of the running rod and arranged for sliding or rolling movement on surface portions extending in the longitudinal direction of the running rod, at least one sheave which is arranged to roll on the running rod, and transmission means which are arranged to translate the rotating motion of the at least one sheave into rotation of the drive shaft of the at least one generator; and a first float which is floatingly disposed in an area affected by waves and which is connected to the running rod by a primary driving line substantially of tensile strength.
    Type: Application
    Filed: March 3, 2008
    Publication date: February 11, 2010
    Applicant: CRAFT SERVICES AS
    Inventor: Olaf Akervoll
  • Publication number: 20090041575
    Abstract: Driving apparatus for a wave power device, in which a turbine is placed in a substantially stationary open tubular element, the tubular element extending through the water surface into the water, and in which the amount of water flowing into and out of the tubular element due to a varying wave height around the tubular element, has to pass the turbine; alternatively, the tubular element being placed substantially horizontally below the water surface, a flow of water passing through it, the turbine being connected to a supported turbine shaft, and the turbine shaft being provided with a co-rotating eccentric part, the eccentric part being surrounded by a freely rotatable eccentric bearing connected to the eccentric part, and the eccentric bearing forming the driving part of a fluid pump.
    Type: Application
    Filed: March 1, 2006
    Publication date: February 12, 2009
    Inventor: Paul K. Morch
  • Patent number: 7419366
    Abstract: An apparatus for storage of potential energy using water from a deep body of water is described. The apparatus comprises one module including a cylinder, a piston slidably connected to the cylinder, a column for storing the water from the deep body of water received through an inlet being in communication with the cylinder/piston, and a connecting tube which mutually connects the cylinder and the column. The apparatus further comprises driving means for reciprocally displacing the piston in relation to the cylinder, wherein the driving means is a crankshaft drivingly connected to the piston and at least one flywheel mounted to the crankshaft for counteracting the pressure as result of the water stored in the column.
    Type: Grant
    Filed: May 14, 2001
    Date of Patent: September 2, 2008
    Inventors: Z K Doleh, R. Z. Doleh, John Douglas Lock
  • Patent number: 7131269
    Abstract: The invention relates to a method for utilising wave energy. In the method, the reciprocating movement of a water mass (5) in the vicinity of the bottom (6) of a water basin is adapted to actuate a body (2) or its part attached to the bottom of the water basin, the kinetic energy of the body (2) or its part being recovered into an energy reserve (3), and the energy being transferred from the energy reserve to the object of application. The invention also relates to the apparatus (1) used in the method.
    Type: Grant
    Filed: October 25, 2002
    Date of Patent: November 7, 2006
    Assignee: AW-Energy Oy
    Inventor: Rauno Koivusaari
  • Patent number: 7078827
    Abstract: A tidal generator system is provided that includes a containment tank, and a ring mechanism provided about the containment tank to rise and fall based on tidal actions. A valve mechanism allows a liquid to pass into the containment tank. Additionally, a turbine/generator system generates electrical energy based on the liquid passing through the valve mechanism.
    Type: Grant
    Filed: October 3, 2003
    Date of Patent: July 18, 2006
    Inventor: Doyle W. Brewington
  • Patent number: 7042112
    Abstract: An omni-directional system configured to convert the kinetic and potential energy in ocean waves to electrical energy or in some special cases to other forms of energy such as heat, mechanical and pressure energy. The system employs a float moored by a single hydraulic cylinder anchored to the seabed. Wave energy is captured as the float is displaced vertically and horizontally in response to wave action extending the hydraulic cylinder that in turn forces fluid under high pressure to the float where appropriate valves, hydraulic accumulators, and variable displacement hydraulic motors are arranged to drive electric generators. A secondary benefit of the system is the reduction of near shore erosion.
    Type: Grant
    Filed: February 3, 2004
    Date of Patent: May 9, 2006
    Assignee: Seawood Designs Inc.
    Inventor: Charles Wood
  • Patent number: 7023104
    Abstract: An impulse-type “wave motor” employs a seabed-mounted or supported structure mounting a wave energy absorbing panel on a hinged lever arm for reciprocation motion to obtain optimal absorption of wave energy from wave motion in the sea. For deepwater wavelengths of L, the panel is optimally positioned in a region within L/2 depth from the sea surface. The panel motion is coupled by a connecting rod to a fluid pump which generates a high-pressure fluid output that may be used to drive a reverse osmosis desalination unit or to produce other useful work. Seawater or brackish water may be desalinated through reverse osmosis membranes to produce water quality for consumption, agricultural, or other uses. The submerged operating environment of the device in a region of one-half the design wavelength provides the maximum available energy flux and forced oscillations. The pump may be of the positive-displacement piston type, plunger type, or multi-staging driver type, or a variable volume pump.
    Type: Grant
    Filed: July 9, 2003
    Date of Patent: April 4, 2006
    Inventors: Alvin Kobashikawa, Yu-Si Fok
  • Patent number: 6981373
    Abstract: A buoyancy engine, including an upper casing, a lower casing, and a manifold separating the upper and lower casings. The manifold has internal and external control means, that control amounts of liquid entering and leaving the manifold and casings through a primary route and an alternate route. There is a variably ballasted power piston within the upper casing, into and out of which liquid ballast can be pumped to change its buoyancy. There is a liquid discharge piston within the lower casing, that can be coupled to the variably ballasted power piston to form a primary pump. There is also a backup pump that can be used when the primary pump fails. A mechanical slide valve controls the entrance and exit of liquid from the manifold through the primary route.
    Type: Grant
    Filed: May 14, 2004
    Date of Patent: January 3, 2006
    Inventor: Mark Douglas Robinson
  • Patent number: 6864592
    Abstract: Apparatus for converting the motion of sea wave energy to electrical energy includes one or more float driven linear generators, in which the inertial mass of the float and any linkage means to the linear generator is minimised. In order to generate electrical power consistently upon both the upstroke and downstroke of the float, the moving part of the generator is so sized that its gravitational weight acting upon the float, together with that of the float itself and any intermediate linkage means, is substantially equal to half the total buoyancy of the float.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: March 8, 2005
    Assignee: Hugh-Peter Granville Kelly
    Inventor: Hugh-Peter Granville Kelly
  • Patent number: 6863806
    Abstract: A tidal-powered desalinization system is mounted on a barge that oscillates about fixed pier structures, generating a two-way pumping action. The two-way pumping action is changed to a single direction flow of seawater. The sea water is directed into an on-board desalinization system. Fresh water is produced and collected in reservoirs, without an intervening generation of electricity.
    Type: Grant
    Filed: April 4, 2003
    Date of Patent: March 8, 2005
    Assignee: Lunatech, LLC
    Inventors: Christian Stark, Brett Holton
  • Patent number: 6800954
    Abstract: A system and method for producing energy comprising an impoundment area having at least one buoyancy device positioned therein and extending from a pressurization assembly. The impoundment area is preferably positioned with respect to a lifting fluid source such that, by opening an inlet, lifting fluid will flow into the impoundment area to create a rising fluid level and will cause a motive fluid to flow into the pressurization assembly. The lifting fluid can then be removed from the impoundment area to cause the motive fluid to be pressurized. The pressurized motive fluid will preferably be delivered to a fluid turbine.
    Type: Grant
    Filed: May 17, 2002
    Date of Patent: October 5, 2004
    Inventor: Brian K. Meano
  • Publication number: 20040161347
    Abstract: Described is a drive assembly (20) and a production assembly (22) for use in producing reciprocating motion. In one embodiment, the drive assembly is formed as a flexible hose hydraulic cylinder that uses a source of fluid pressure to extend and retract a flexible hose. One or more valves are available to regulate the pressure within the flexible hose. A reciprocating member is connected to the flexible hose. Extension and retraction of the hose cause corresponding translation in the reciprocating member. In one embodiment, the reciprocating member is a piston rod that is biased in one direction.
    Type: Application
    Filed: February 19, 2003
    Publication date: August 19, 2004
    Inventor: Richard K. Harris
  • Patent number: 6768217
    Abstract: A known type of surface wave energy converter comprises a submerged elongated tube supported by, but being vertically movable relative to, an anchored float. The tube vertically reciprocates in response to overpassing surface waves and drives a transducer for generating useful energy. Improvements include: a motion translator between the tube and the transducer for reducing the stroke length of the transducer and magnifying the force transmitted to the transducer; an energy buffer system for limiting the travel of the tube in response to excessively large surface waves; a gravity anchor for the system for absorbing energy from even greater amplitude waves; means for adjusting buoyancy in response to changing conditions, and pressure relief valves for automatically reducing excessive tube driving pressures caused by excessively large overpassing waves. Energy present in tilting movements of the apparatus are optionally captured in horizontally disposed transducers.
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: July 27, 2004
    Assignee: Ocean Power Technologies, Inc.
    Inventors: Peter Donald Chalmers, Jason Robert Liddell, William Blaine Powers
  • Publication number: 20040131479
    Abstract: A system and method generating electricity includes converting wave motion into mechanical power. A fluid matter is driven as a function of the mechanical power to a reservoir. The fluid matter is flowed from the reservoir. At least a portion of a kinetic energy of the flowing fluid matter is converted into electrical energy. The fluid matter may be liquid or gas.
    Type: Application
    Filed: October 10, 2003
    Publication date: July 8, 2004
    Inventors: Kenneth W. Welch, Curtis J. Rothi, Harold L. Rothi
  • Patent number: 6729857
    Abstract: An energy conversion system using the static head pressure of large bodies of water to compress a gas. A Pascal hydraulic link between a small piston and a large piston multiplies the force of the large piston compressing the gas. Heat transfer is established between the gas compressed by the large piston and a fluid used to drive a turbine. After time, the static head pressure on the small piston is relieved allowing the compressed gas to expand ending a cycle. Electrical energy is produced by a generator driven by the turbine using thermal energy generated by repeated compressions of the gas.
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: May 4, 2004
    Inventor: Fikret Mehmet Zabtcioglu