Ocean wave power recovery and conversion spar buoy engine

• US 7,535,117 B2
• Filed: 06/18/2007
• Issued: 05/19/2009
• Est. Priority Date: 06/17/2006
• Status: Expired due to Fees

• Current Assignee: James Scott Montgomery
• Original Assignee: James Scott Montgomery
• Inventors: Montgomery, James Scott
• Primary Examiner(s): Waks; Joseph
• Application Number:
  US11/764,798
• Publication Number:
  US 20080088134A1
• Time in Patent Office: 701 Days
• Field of Search: 290/53
• US Class Current: 290/53
• CPC Class Codes: B63B 2021/505 Methods for installation or mooring of floating offshore platforms on site
• CPC Class Codes: B63B 2035/442 Spar-type semi-submersible structures, i.e. shaped as single slender, e.g. substantially cylindrical or trussed vertical bodies
• CPC Class Codes: B63B 2035/4466 for converting water energy into electric energy, e.g. from tidal flows, waves or currents
• CPC Class Codes: B63B 35/44 Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices construction methods for floating offshore platforms B63B75/00
• CPC Class Codes: F03B 13/1865 where the connection between wom and conversion system takes tension only F03B13/187, F03B13/1875 take precedence
• CPC Class Codes: F03B 13/187 and the wom directly actuates the piston of a pump
• 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 2220/7068 equipped with permanent magnets
• CPC Class Codes: F05B 2240/93 on a structure floating on a liquid surface
• CPC Class Codes: Y02E 10/30 Energy from the sea, e.g. using wave energy or salinity gradient

Abstract

A device for capturing power in a wave of a body of water and converting it to useful form. The device includes a housing portion having an opening for receiving flow from a wave in a body of water, and an engine portion within said housing adapted to be acted upon by the flow from the wave, thereby producing electricity. The device also includes at least one float portion to position the device at a desired depth within a body of water.

Claims

1. A device for capturing power in a wave of a body of water and converting it to useful form, the device comprising:

a) a housing portion, said housing portion having at least one opening for receiving flow from a wave of a body of water; and

b) an engine portion operably positioned within said housing portion, said engine portion adapted to generate electricity upon engagement of flow from said wave of said body of water with said engine,

wherein said housing portion remains substantially vertically stationary within said body of water during operation of said device; and

a float portion fixedly attached to said housing portion for positioning said device at a depth within said body of water, wherein said float portion is a spar float.

2. The device according to claim 1 further comprising a float portion fixedly attached to said housing portion for positioning said device at a depth within said body of water.

3. The device according to claim 2 wherein said float portion is a spar float.

4. The device according to claim 1 further comprising a receiving portion fixedly attached to said housing portion at the at least one opening thereof, said receiving portion having a diameter greater than that of said housing portion for receiving flow from said wave of said body of water and directing said flow into said housing portion.

5. The device according to claim 1 wherein said engine portion is selected from the group consisting of a linear alternator, a linear pump, and a rotary slide crank.

6. A device for capturing power in a wave of a body of water and converting it to useful form, the device comprising:

a) a housing portion, said housing portion having first and second ends, said first end of said housing portions having an opening for receiving flow from a wave of a body of water;

b) a main float portion fixedly attached to a second end of said housing portion;

c) a spar float portion fixedly attached to said main float portion; and

d) an engine portion operably positioned within said housing portion, said engine portion adapted to generate electricity upon engagement of flow from said wave of said body of water with said engine,

wherein said housing portion remains substantially vertically stationary within said body of water during operation of said device.

7. The device according to claim 6 further comprising a receiving portion fixedly attached to said first end of said housing portion, said receiving portion having a diameter greater than that of said housing portion for receiving flow from said wave of said body of water and directing said flow into said housing portion.

8. The device according to claim 7 wherein said receiving portion is a bell-shaped portion.

9. The device according to claim 7 further comprising a weight portion fixedly attached to said receiving portion for maintaining said device at a depth within said body of water.

10. The device according to claim 6 further comprising an attachment portion removably attached to said main float portion for securing said device at a location within said body of water.

11. The device according to claim 6 wherein said housing portion is positioned substantially horizontally within said body of water and further comprising a second spar float portion for providing stability to said device.

12. The device according to claim 6 wherein said housing is substantially cylindrical in shape and further wherein said engine comprises a prime mover piston adapted to move within said housing when said prime mover piston engages flow from said wave of said body of water.

13. The device according to claim 12 wherein said engine portion is selected from the group consisting of a linear alternator, a linear pump, and a rotary slide crank.

14. The device according to claim 12 wherein said housing further comprises a transducer region and wherein during operation of said device said prime mover piston moves substantially freely along a portion of a useful stroke thereof in order to accumulate inertia prior to entering said transducer region.

15. The device according to claim 12 wherein said housing further includes a valve at a second end thereof to direct water away from said prime mover piston at the end of a useful stroke thereof.

16. The device according to claim 12 wherein a natural heave period of said device is lower than that of a wave of a body of water in which said device is positioned, and further wherein a period of said prime mover piston is faster than that of said wave, such that said device is substantially insensitive to a passing wave'"'"'s natural period.

17. The device according to claim 6 wherein said engine portion further comprises slide valves in operable engagement therewith.

18. A device for capturing power in a wave of a body of water and converting it to useful form, the device comprising:

a) a cylindrical housing portion, said housing portion having first and second ends, said first end of said housing portions having an opening for receiving flow from a wave of a body of water;

b) a main float portion fixedly attached to a second end of said housing portion;

c) a spar float portion fixedly attached to said main float portion;

d) an engine portion operably positioned within said housing portion, said engine portion adapted to generate electricity upon engagement of flow from a wave of a body of water with said engine and comprising a prime mover piston adapted to move within said housing when said prime mover piston engages flow from said wave of said body of water;

e) a receiving portion fixedly attached to said first end of said cylindrical housing portion, said receiving portion having a diameter greater than that of said housing portion for receiving flow form said wave of said body of water and directing said flow into said housing portion; and

f) a weight portion fixedly attached to said receiving portion for maintaining said device at said depth within said body of water

wherein said housing portion remains substantially vertically stationary within said body of water during operation of said device.

19. The device according to claim 18 wherein said engine portion is selected from the group consisting of a linear alternator, a linear pump, and a rotary slide crank.

20. The device according to claim 18 further comprising an attachment portion for attaching said device to a bottom surface of said body of water in which said device is positioned.