Mooring system for drifting energy converters

Patent metadata

Field	Value
Publication number	US-10988211-B2
Application number	US-202016938226-A
Country	US
Kind code	B2
Filing date	Jul 24, 2020
Priority date	Aug 3, 2016
Publication date	Apr 27, 2021
Grant date	Apr 27, 2021

Abstract

A system that maintains the relative and/or absolute geographical positions of two or more buoyant devices floating in a body of water. A plurality of formation restoring tethers are disclosed which permit the unrestricted vertical movement of networked buoyant devices, while resisting increases in their lateral separations by providing restoring forces to oppose such separations. Tensioning mechanisms incorporated into the tethers generate the resistance to the lateral separations of two or more entities by transforming such separations into an increase in the potential energy stored within such tensioning mechanisms, the potential energy of which is released in the process of restoring the original separations and/or positions of the displaced buoyant devices.

First claim

We claim:

1. A formation-restoring system for drifting Motion-To-Electrical Energy Transforming Devices (MTEETDs), comprising:
a plurality of drifting interconnected MTEETDs;
a first tether connected to a first MTEETD;
a second tether connected to a second MTEETD; and
at least one buoyancy spring connecting the first and second tether, the at least one buoyancy spring formed of at least one positively buoyant element and at least one negatively buoyant element, the at least one buoyancy spring adapted to exert no force on the first and second MTEETDs when the first MTEETD is separated from the second MTEETD by a distance less than a critical distance, and adapted to exert a separation restoring, attractive force when the first MTEETD is separated from the second MTEETD by a distance greater than the critical distance;
wherein a horizontal expansion of the buoyancy spring imparts buoyancy-based potential energy to a vertically reciprocating member; and
wherein the buoyancy spring converts the buoyancy-based potential energy to the separation restoring, attractive force to bias a separation distance of the first and second MTEETDs toward the critical distance.

2. The formation restoring system of claim 1 , wherein the vertically reciprocating member has a positive buoyancy.

3. The formation restoring system of claim 1 , wherein the vertically reciprocating member has a negative buoyancy.

4. The formation restoring system of claim 1 , wherein the MTEETDs convert wave motion to electrical energy.

5. The formation restoring system of claim 1 , wherein the MTEETDs convert wind motion to electrical energy.

6. The formation restoring system of claim 1 , wherein the buoyancy spring further comprising a second positively buoyant element, and wherein the at least one negatively buoyant element is disposed between the at least one positively buoyant element and the second positively buoyant element.

7. The formation restoring system of claim 1 , wherein the buoyancy spring further comprising a second negatively buoyant element, and wherein the at least one positively buoyant element is disposed between the at least one negatively buoyant element and the second negatively buoyant element.

Assignees

• Lone Gull Holdings Ltd

Inventors

• Moffat Brian Lee
• Sheldon-Coulson Garth Alexander

Classifications

• Y02E10/72

  Wind turbines with rotation axis in wind direction · CPC title

• B63B2021/005

  Resilient passive elements to be placed in line with mooring or towing chains, or line connections, e.g. dampers or springs · CPC title

• B63B21/50 Primary

  Anchoring arrangements {or methods} for special vessels, e.g. for floating drilling platforms or dredgers · CPC title

• Y02E10/727

  Offshore wind turbines · CPC title

• F03B13/14

  using wave energy · CPC title