US4970979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sailing yacht
Assignee: Airbus Defence and Space GmbH
•
Filing: 1988-12-03
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Granted: 1990-11-20
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Expires: 2008-12-03
Abstract
Abstract A sailing yacht having a hull and a sectional mast holding a sail, is equipped with a canard rudder and two rolling keels. Each rolling keel has a ballast container. A three point wing system is formed by wings carried by the canard rudder and by the two rolling keels for producing buoyancy, for steering, and for stabilizing. Thus, the three point wing system has a fore wing (9) forming an end wing of the canard rudder and two aft wings (11, 11') forming end wings of the rolling keels (10, 10'). The rolling keels (10, 10') are tiltable about rotational axes extending above the water line approximately in parallel to the hull axis, whereby the rolling keels (10, 10') are normally above the water line and only the long end (14, 14') of the wing (11, 11') dips into the water, so that the end disk wing (15) functions as a lift producing surface. The ballast is shiftable between two ballast containers 17, 17'.
Inventors
- 👤 Ernst-August Bielefeldt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:48
CPC Classifications
B; B63; B63H; B63H25/00; B63H25/06; B63B; B63B1/00; B63B1/16; B63B1/24; B63B1/28; B63B1/30; B63H9/00; B63H9/04; B63H9/06; B63H9/061
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
205 words
A sailing yacht, comprising a hull with a bow and a stern, a mast mounted on said yacht for holding a sail, canard rudder means secured to said hull near said bow, two rolling keels each hinged to one side of said hull rearwardly of said canard rudder, a first wing means secured as an end wing to said canard rudder, second wing means secured to one rolling keel, third wing means secured to the other rolling keel, said first, second, and third wing means forming a three point wing system for producing buoyancy, for steering, and for stabilizing, said second and third wing means extending approximately perpendicularly from said rolling keels, each of said second and third wing means comprising a long wing section and a short wing section opposite said long wing section, said long wing section extending approximately downwardly when the respective rolling keel is tilted laterally outwardly, each long wing section comprising a wing end disk, said rolling keels being so positioned that in a laterally outwardly tilted position the respective rolling keel is above water and only the corresponding long wing section dips into the water so that the respective wing end disk functions as a lift producing wing surface.
Claim 2
Dependent Claim
205 words
A sailing yacht, comprising a hull with a bow and a stern, a mast mounted on said yacht for holding a sail, canard rudder means secured to said hull near said bow, two rolling keels each hinged to one side of said hull rearwardly of said canard rudder, a first wing means secured as an end wing to said canard rudder, second wing means secured to one rolling keel, third wing means secured to the other rolling keel, said first, second, and third wing means forming a three point wing system for producing buoyancy, for steering, and for stabilizing, said second and third wing means extending approximately perpendicularly from said rolling keels, each of said second and third wing means comprising a long wing section and a short wing section opposite said long wing section, said long wing section extending approximately downwardly when the respective rolling keel is tilted laterally outwardly, each long wing section comprising a wing end disk, said rolling keels being so positioned that in a laterally outwardly tilted position the respective rolling keel is above water and only the corresponding long wing section dips into the water so that the respective wing end disk functions as a lift producing wing surface.
Claim 3
Dependent Claim
89 words
The sailing yacht of claim 1, wherein each of said rolling keels comprises a ballast container secured to an end of the respective rolling keel, and wherein said long wing section and said short wing section are secured to the respective ballast container on opposite sides thereof, so that said long and short wing sections extend approximately vertically when a respective rolling keel extends approximately horizontally, and so that said long and short wing sections extend approximately horizontally for producing lift when said respective rolling keel extends approximately vertically.
Claim 4
Dependent Claim
56 words
The sailing yacht of claim 1, wherein each rolling keel has a separate hinging axes extending above a water line and approximately in parallel to a longitudinal hull axis for permitting the respective rolling keel to normally extend above water and to dip into the water in a downwardly tilted position of the respective rolling keel.
Claim 5
Dependent Claim
16 words
The sailing yacht of claim 1, wherein said mast has a trailing edge with an S-configuration.
Claim 6
Dependent Claim
19 words
The sailing yacht of claim 1, wherein said mast has a mast tip adapted for telescoping into said mast.
Claim 7
Dependent Claim
29 words
The sailing yacht of claim 1, further comprising gliding flaps arranged laterally at said stern and tiltable about hinging axes extending approximately in parallel to a longitudinal hull axis.
Claim 8
Dependent Claim
13 words
The sailing yacht of claim 1, wherein said mast comprises a nose flap.
Claim 9
Dependent Claim
13 words
The sailing yacht of claim 1, wherein said mast has an aerodynamic cross-section.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-19 | 1994-05-21 | 1994-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-19 | 1998-05-21 | 1998-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-19 | 2002-05-21 | 2002-11-20 | $7700.00 | Window Closed / Lapsed |