U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Wave driven power generation system

Patent 4781023 Issued on November 1, 1988. Estimated Expiration Date: Icon_subject November 30, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

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Inventor

Assignee

Application

No. 07/126969 filed on 11/30/1987

US Classes:

60/506, Working member pivotally supported290/42, Tide and wave motors290/53, TIDE AND WAVE MOTORS417/332, Pivoted60/398, Utilizing natural energy or having a geographic feature60/505Having relatively movable working members

Examiners

Primary: Husar, Stephen F.

Attorney, Agent or Firm

International Classes

F03B 13/20 (20060101)
F03B 13/00 (20060101)

Abstract

This invention relates to a system for the generation of useful energy from the power in ocean waves. The wave power generation system is an array of individual absorber units each consisting of a buoyant raft, connected to a stable mooring assembly by means of a yoke so as to allow relative motion between the buoyant raft and the mooring assembly in response to the motion of the waves. A linkage between the buoyant raft and the yoke allows conversion of the relative motion into mechanical, hydraulic and/or electrical power. The system is designed to be responsive to the broad spectrum of frequencies present in ocean waves. The response characteristics of the individual absorber units can be changed to match the conditions of the incident waves in order to provide maximum power conversion efficiency. Each unit of the array is tuned to a condition for maximum power absorption by control of the shape, mass, moments, and power extraction impedance. The system is deployed so as to minimize the capital and operating cost of the system. The deployment configuration is selected to produce minimum aesthetic effect on the environment yet be close enough to shore to keep electrical transmission and mooring costs to a minimum and to extract the maximum amount of power per unit area of installation. The system is capable of producing base load power to a large electrical grid.

Other References

  • "Available Ocean Wave Power and Prediction of Power Extracted by a Contouring Raft Conversion System", by E. L. Burdette and C. K. Gordon, Journal of Energy Resources Technology, Dec. 1983
  • "Observation of the Power Spectrum of Ocean Waves Using a Cloverleaf Buoy", by Hisashi Mitsuyasu, Fukuzo Tasai, Toshiro Suhara, Research Institute for Applied Mechanics, Kyushu University, Fukuoka, Japan, Sep. 5, 1979
  • Marine Hydrodynamics, by J. N. Newman, The MIT Press (1977), pp. 285-311
  • Principles of Naval Architecture, by J. E. Comstock, Society Naval Architects, 9/1967, pp. 611-620
  • "Effect of Various Spectral Formulations in Predicting Responses of Marine Vehicles and Ocean Structures", by Michael K. Ochi and Susan Bales, D. W. Taylor Naval Ship R&D Center, Offshore Technology Conference, May 2-5, 1977
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