Mechanism for generating power from wave motion on a body of water

• US 4,352,023 A
• Filed: 01/07/1981
• Issued: 09/28/1982
• Est. Priority Date: 01/07/1981
• Status: Expired due to Fees

• Current Assignee: George A. Sachs, Herbert K. Sachs
• Original Assignee: George A. Sachs, Herbert K. Sachs
• Inventors: Sachs, George A., Sachs, Herbert K.
• Primary Examiner(s): Rubinson, Gene Z.
• Assistant Examiner(s): Wade, Shelley
• Application Number:
  US06/223,120
• Time in Patent Office: 629 Days
• Field of Search: 60/495, 60/497, 60/499-501, 60/505-507, 290/42, 290/53, 417/330-333
• US Class Current: 290/42
• CPC Class Codes: F03B 13/20 wherein both members , i.e. wom and rem are movable relative to the sea bed or shore
• CPC Class Codes: F05B 2250/44 one element moving inside another one, e.g. wave-operated member (wom) moving inside another member (rem)
• CPC Class Codes: Y02E 10/30 Energy from the sea, e.g. using wave energy or salinity gradient

Abstract

A mechanism for generating power from wave motion on a body of water. The mechanism includes a buoyant body which is adapted to float on a body of water and to roll and pitch in response to the wave motion of the water. A gyro-wave energy transducer is mounted on the buoyant body for translating the pendulum-like motions of the buoyant body into rotational motion. The gyro-wave energy transducer includes a gimbal comprised of first and second frames, with the first frame being pivotally mounted to the second frame and the second frame being pivotally mounted to the buoyant body. A gyroscope is mounted to the first frame for rotation about an axis perpendicular to the axes of rotation of the first and second frames. A motor/generator is coupled to the gyroscope for maintaining a controlled rotational velocity for the gyroscope. Transferring members are associated with one of the first and second frames for transferring torque of one of the first and second frames to the gyroscope about an axis that is perpendicular to that of the gyroscope which results in rotation of the other of the first and second frames. An electrical generator is responsive to the relative rotational movement of the first and second frames for generating electrical energy. A storage battery is mounted on the buoyant body for storing and releasing electrical energy and is operatively coupled to the motor/generator and the electrical generator. A control circuit is associated with the generator and the motor/generator unit of the gyroscope and is responsive to the time rate of change of current produced by the generator for controlling the rotational velocity of the gyroscope in order to maintain maximum power output from the electrical generator.

Claims

1. A mechanism for generating power from wave motion in a body of water comprising:

a buoyant body adapted to float in said body of water and be partially immersed therein, said buoyant body being pivotally movable in response to said wave motion;

a gyro-wave energy transducer mounted to said buoyant body, said gyro-wave energy transducer comprising;

a gimbal including first and second frames, said first frame being pivotally mounted to said second frame for rotation about a first axis, said second frame being pivotally mounted to said buoyant body for rotation about a second axis perpendicular to said first axis;

a gyroscope mounted to said first frame for rotation about a third axis perpendicular to said first and second axes;

means for transferring rotational movement of one of said first and second frames to rotational movement of the other of said first and second frames;

means, responsive to the rotation of said other of said first and second frames, for generating electrical power;

means, coupled to said gyroscope, for maintaining said gyroscope at a controlled rotational velocity;

electrical power storage means, connected to said generating means and to said gyroscope rotational velocity maintaining means, for storing and releasing electrical power; and

means, responsive to the time rate of change of current from said generating means and operatively coupled to said gyroscope rotational velocity maintaining means, for controlling the rotational velocity of said gyroscope to maintain maximum power output from said said generating means.

2. The mechanism of claim 1 wherein the generating means includes a first electrical generator coupled to one of the first and second frames such that rotation of said one of said first and second frames causes electrical current to be produced by said first electric generator.

3. The mechanism of claim 2 wherein the generating means further includes the first and second means, connected to opposed sides of the one of the first and second frames, for unidirectionally coupling said generating means to said one frame such that said first unidirectional coupling means couples rotation of said one frame in a first direction only to said generating means and said second unidirectional coupling means couples rotation of said one frame in an opposed second direction only to said generating means.

4. The mechanism of claim 3 wherein the generating means further includes first and second transmission means, respectively connected to the first and second unidirectional coupling means, for increasing the amount of angular rotation of the one frame which is input to the generating means.

5. The mechanism of claim 1 wherein the electrical power storage means comprises a battery mounted on the buoyant body.

6. The mechanism of claim 1 wherein the gyroscope rotational velocity maintaining means includes a motor/generator mounted to the first frame and coupled to the gyroscope.

7. The mechanism of claim 3 wherein the first and second unidirectional coupling means each comprise:

a drive shaft connected to the one frame and extending outward therefrom;

a drive member operatively joined to said drive shaft for rotation therewith, said drive member being slidable along the length of said drive shaft;

a driven member, said driven member having an integral output shaft extending outward therefrom; and

means for biasing said drive and driven members into engagement;

said drive and driven members having mating surfaces configured to be coupled together for simultaneous rotation upon rotation of said one frame in a first direction and to slide over each other when said one frame rotates in a second opposed direction such that rotation of said drive shaft caused by rotation of said one frame results in rotation of said output shaft of said driven member only upon rotation of said one frame in one direction.

8. The mechanism of claim 1 wherein the buoyant body comprises a floatable buoy adapted to float on the surface of the body of water with a portion thereof submerged beneath said surface;

said buoy defining a platform for the gyro-wave energy transducer; and

a plurality of circumferentially spaced vanes joined to and extending outward from said buoy.

9. The mechanism of claim 8 where there are at least four equally spaced vanes.

10. The mechanism of claim 8 wherein opposing vanes have symmetrical propeller blade-shaped cross sectional configuration.

11. The mechanism of claim 8 further including means for attaching the buoy to the bottom floor of the body of water.

12. The mechanism of claim 11 wherein the attaching means comprises:

an elongated rod adapted to be anchored to the bottom floor of the body of water; and

ball and socket means for coupling the buoy to said rod to permit rotary and vertical deflectional movement of said buoy with respect to said rod.

13. The mechanism of claim 1 wherein the buoyant body comprises a floatable water craft adapted to be anchored in a fixed position and be pivotally movable in response to waves impinging thereon.

14. The mechanism of claim 13 further including a plurality of identical gyro-wave energy transducers mounted upon the floatable water craft.

15. The mechanism of claim 1 wherein the gyro-wave energy transducer is mounted within a hermetically sealed housing disposed upon the buoyant body.

16. The mechanism of claim 1 wherein the means for controlling the rotational velocity of the gyroscope comprises:

differentiator means, coupled to the generating means, for determining the time rate of change of the output current of said generator means;

first switch means, responsive to said differentiator means when the time rate of change of the output current from said generating means is decreasing, for coupling the gyroscope to the gyroscope rotational velocity maintaining means to decrease the angular velocity of said gyroscope; and

second switch means, responsive to said differentiator means when the time rate of change of said output current from said generating means is increasing, for coupling said gyroscope to said gyroscope rotational velocity maintaining means to increase the angular velocity of said gyroscope.

17. The mechanism of claim 4 wherein the first frame is oriented in a substantially vertical position when in a static condition;

the gyroscope is mounted for rotation in a substantially horizontal plane when in a static condition; and

the second frame is oriented in a substantially horizontal position when in a static condition.

18. The mechanism of claim 17 wherein the generating means includes first and second generators;

said first frame having outwardly extending drive shafts integrally formed with opposed vertical legs thereof;

the first and second unidirectional coupling means and the first and second transmission means respectively and unidirectionally coupling rotation of the drive shafts connected to said first frame to rotation of the armatures of said first and second generators for producing electrical power upon rotation of said first frame in first and second opposed directions.

19. The mechanism of claim 18 wherein the transferring means comprises first and second biasing means for coupling the motions of the second frame with those of the buoyant body.

20. The mechanism of claim 19 wherein the biasing means comprises coil springs disposed substantially vertically from the buoyant body and connected at one end to said buoyant body and to the second frame at the opposed end.

21. The mechanism of claim 17 wherein the generating means includes first and second electrical generators mounted to the buoyant body;

first and second drive shafts extending outward from opposed horizontally extending legs of the second frame;

the first and second unidirectionally coupling means and the first and second transmission means respectively coupling rotation of the first and second drive shafts connected to said second frame to said first and second electrical generators; and

the transferring means being disposed between opposed legs of the first frame and the corresponding opposed legs of said second frame for transferring rotational movement of said first frame to rotational movement of said second frame.

22. The mechanism of claim 21 wherein the translating means comprises torsion springs.

23. The mechanism of claim 17 wherein the generating means includes a first electrical generator mounted to the buoyant body;

first and second output shafts connected and extending outward from opposed horizontally disposed legs of the second frame;

connecting means extending between and coupling the first and second transmission means;

means for reversing the direction of rotation of said second transmission means to correspond to the direction of rotation of said first transmission means;

said first and second unidirectional coupling means and said first and second transmission means respectively coupling rotation of said first and second output shafts connected to said second frame to said first generator for producing electrical power upon rotation of the first and second frame; and

wherein the transferring means is disposed between and connected to opposed spaced legs of the first frame and the corresponding legs of the second frame.

24. A gyro-wave energy transducer, adapted to be mounted to a platform disposed in a fluid body and pivotally movable in response to movements of said fluid body, for generating power from said movement of said fluid body, said gyro-wave energy transducer comprising:

a gimbal including first and second frames, said first frame being pivotally mounted to said second frame for rotation about a first axis, said second frame being pivotally mounted to said platform for rotation about a second axis perpendicular to said first axis;

a gyroscope mounted to said first frame for rotation about a third axis perpendicular to said first and second axes;

means for transferring rotational movement of one of said first and second frames to rotational movement of the other of said first and second frames;

means, responsive to the rotation of said other of said first and second frames, for generating electrical power;

means, coupled to said gyroscope, for maintaining said gyroscope at a controlled rotational velocity;

electrical power storage means, connected to said generating means and to said gyroscope rotational velocity maintaining means, for storing and releasing electrical power; and

means, responsive to the time rate of change of current from said generating means and operatively coupled to said gyroscope rotational velocity maintaining means, for controlling the rotational velocity of said gyroscope to maintain maximum power output from said generating means.

25. The gyro-wave energy transducer of claim 24 wherein the generating means includes a first electrical generator coupled to one of the first and second frames such that rotation of said one of said first and second frame causes electrical current to be produced by said first electric generator.

26. The mechanism of claim 25 wherein the generating means further includes the first and second means, connected to opposed sides of the one of the first and second frames, for unidirectionally coupling said generating means to said one frame such that said first unidirectional coupling means couples rotation of said one frame in a first direction only to said generating means and said second unidirectional coupling means couples rotation of said one frame in an opposed second direction only to said generating means.

27. The mechanism of claim 26 wherein the generating means further includes first and second transmission means, respectively connected to the first and second unidirectional coupling means, for increasing the amount of angular rotation of the one frame which is input to the generating means.

28. The mechanism of claim 27 wherein the generating means includes first and second generators;

said first frame having outwardly extending drive shafts integrally formed with opposed vertical legs thereof;

the first and second unidirectional coupling means and the first and second transmission means respectively and unidirectionally coupling rotation of the drive shafts connected to said first frame to rotation of the armatures of said first and second generators for producing electrical power upon rotation of said first frame in first and second opposed directions.

29. The mechanism of claim 28 wherein the transferring means comprises first and second biasing means for coupling the motions of the second frame with those of the buoyant body.

30. The mechanism of claim 29 wherein the biasing means comprises coil springs disposed substantially vertically from the buoyant body and connected at one end to said buoyant body and to the second frame at the opposed end.

31. The mechanism of claim 27 wherein the generating means includes first and second electrical generators mounted to the buoyant body;

first and second drive shafts extending outward from opposed horizontally extending legs of the second frame;

the first and second unidirectionally coupling means and the first and second transmission means respectively coupling rotation of the first and second drive shafts connected to said second frame to said first and second electrical generators; and

the transferring means being disposed between opposed legs of the first frame and the corresponding opposed legs of said second frame for transferring rotational movement of said first frame to rotational movement of said second frame.

32. The mechanism of claim 31 wherein the transferring means comprises torsion springs.

33. The mechanism of claim 27 wherein the generating means includes a first electrical generator mounted to the buoyant body;

first and second output shafts connected and extending outward from opposed horizontally disposed legs of the second frame;

connecting means extending between and coupling the first and second transmission means;

means for reversing the direction of rotation of said second transmission means to correspond to the direction of rotation of said first transmission means;

said first and second unidirectional coupling means and said first and second transmission means respectively coupling rotation of said first and second output shafts connected to said second frame to said first generator for producing electrical power upon rotation of the first and second frames; and

wherein the transferring means is disposed between and connected to opposed spaced legs of the first frame and the corresponding legs of the second frame.