Patent US4098086A successfully refreshed from Google Patents.
US4098086A
Expired / Lapsed
US
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Breakwater
Assignee: BP PLC
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Filing: 1976-10-18
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Granted: 1978-07-04
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Expires: 1996-10-18
Abstract
Abstract Method of wave calming in which a plate rigid in the direction of wave travel is suspended in the water to be calmed. The plate has a length of one half of the incident water wavelength in the wave direction and is suspended to a still water depth of 1/5 to 1/40 of the plate beam.
Inventors
- 👤 Denis Henry Desty
- 👤 Roger Duckworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:55
CPC Classifications
E; E02; E02B; E02B3/00; E02B3/04; E02B3/06; E02B3/062; Y; Y02; Y02A; Y02A10/00; Y02A10/11
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
125 words
A floating breakwater suitable for reducing the height of liquid waves comprising a plate having a beam direction and a cross-beam direction at right angles and in the plane of the plate, the plate being substantially rigid at least along the beam direction, wherein the ratio of mean liquid wavelength to the length of the plate along its beam direction is 0.5 to 5.0, buoyancy means associated with the plate so as to locate the upper surface of the plate at a depth of 1/40 to 1/5 of the length of the plate along its beam direction below the mean liquid surface level, and anchoring means attached to said plate which permit rocking motion of the plate along a horizontal axis in the cross-beam direction.
Claim 2
Dependent Claim
125 words
A floating breakwater suitable for reducing the height of liquid waves comprising a plate having a beam direction and a cross-beam direction at right angles and in the plane of the plate, the plate being substantially rigid at least along the beam direction, wherein the ratio of mean liquid wavelength to the length of the plate along its beam direction is 0.5 to 5.0, buoyancy means associated with the plate so as to locate the upper surface of the plate at a depth of 1/40 to 1/5 of the length of the plate along its beam direction below the mean liquid surface level, and anchoring means attached to said plate which permit rocking motion of the plate along a horizontal axis in the cross-beam direction.
Claim 3
Dependent Claim
17 words
A floating breakwater according to claim 1 in which the plate is flexible along the cross-beam direction.
Claim 4
Dependent Claim
27 words
A floating breakwater according to claim 2 in which the plate is formed from corrugated welded sheet steel piling having its ridges running in the beam direction.
Claim 5
Dependent Claim
22 words
A floating breakwater according to claim 1 in which the plate is substantially rigid along both its beam direction and cross-beam direction.
Claim 6
Dependent Claim
22 words
A floating breakwater according to claim 4 in which the plate is fabricated from concrete having voids filled with a buoyant material.
Claim 7
Dependent Claim
29 words
A floating breakwater according to claim 1 in which the ratio of mean liquid wavelength to the length of the plate along its beam direction is 1.0 to 2.0.
Claim 8
Dependent Claim
34 words
A floating breakwater according to claim 1 having its mass concentrated near or at a central axis of the plate parallel to the liquid surface, and at right angles to the incident wave direction.
Claim 9
Dependent Claim
25 words
A floating breakwater according to claim 1 having an excess buoyancy in the form of surface floats so as to maintain a substantially constant draught.
Claim 10
Dependent Claim
36 words
A floating breakwater according to claim 1 wherein the depth of the upper surface of the plate below the mean liquid surface level is 1/30 to 1/20 the length of the plate along its beam direction.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |