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8156880 |
Impact absorbing drop keel
The present invention relates to a keel construction for a floating vessel, where a drop keel (3) can be adjusted from a retracted/extended position to an extended/retracted position for the...
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6382121 |
Boat ballast system
A ballast system for a sailing boat includes an elongate body having a first end and a second end. A mounting is provided at the first end of the elongate body for suspending the elongate body from...
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6325009 |
Sailboat for sailing in shallow water
A sailboat having a novel hull shape, a fixed, shallow keel, dual rudders, and retractable, shallow dagger boards for sailing in shallow or shoal water is provided. The combination of features...
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6176191 |
Bilge keel and method for FPSO petroleum production systems
This is a mechanical element intended to control the rolling of FPSO type petroleum production systems which use adapted decommissioned ships as the floating facility. The bilge keel is made up of...
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6032603 |
Method and apparatus to increase the velocity of sailing vessels
An asymmetric wing for decreasing the leeward drift of a vessel has two different surfaces, one of which is cambered in cross-section and the other which has less camber in cross-section or flat....
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5617805 |
Trimaran
An improved trimaran is provided that includes a car-like steering configuration and interchangeable floats or pontoon supports to vary the width of the trimaran, depending on whether the user...
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5503581 |
Apparatus for adjustable fin and fin block
A water ski adjustable fin block and fin are disclosed. The fin block employs a slidable wedge for clamping the fin in place within the fin block during use and allowing the fin to be unclamped...
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5431121 |
Sailboat keel hoist assembly
A keel hoist assembly for use in raising and lowering the keel of a retractable keel sailboat and including a winch unit and a generally tubular retractable support tube. The winch unit is...
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5280760 |
Sailing craft
A sailboat apparatus includes a hull having a bottom, bow and stern portions along with a central portion and at least one mast for supporting a sail extending above the hull. The mast is mounted...
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5235926 |
Anti-skid device for flat-bottomed boats
A pair of pivotally attached fins depend into the water below the hull of the boat. When turning maneuvers are executed the tendency of the boat to skid sideward is resisted by the downwardly...
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5036783 |
Sailing yacht with a centerboard
In a sailing yacht with a centerboard having a hull accommodating a centerboard well containing the centerboard capable of movement therein through rollers along curvilinear guides provided in the...
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4759308 |
Sealing lip assembly for surfboards and sailboats
A sealing lip assembly for surfboards or sailboats, which closes the underwater side of the opening of the centerboard case or fin case in a virtually flow-tight and non-vortical manner in every...
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4721051 |
Tandem winch reels
A tandem-reel realignment winch system having two rotatable reels and a line wound around each of the reels. The line is wound in a first direction around the first reel and in a reverse direction...
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4703708 |
Steerable keel
A steerable keel (10) comprising, in a first embodiment, a stationary section (12) and a rotatable section (14) and in a second embodiment, a stationary section (30) and two rotatable sections (32)...
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4690089 |
Boat with a raisable and lowerable keel
A boat with a raisable and lowerable keel is proposed, which can be constructed as a swivel, lifting or ballast drop keel. The keels are fixed to tensioning members either directly or via cables....
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4563971 |
Retractable boat keel
A boat hull keel is disclosed which retracts into the boat hull on a fixed pivot. The pivot location is placed above the keel/hull bottom intersection, rearward of the major axis of the fully...
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4439166 |
Adjustable water ski fin and wing
A water ski fin is carried by a housing mounted to the upper surface of the rear end of a ski with the fin extending downwardly through an elongated slot in the ski. The fin carries a transversely...
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4378748 |
Sailboat keel apparatus
A sailboat carries a pair of opposed keel sections which are angularly positionable about a common hinge axis, either as a keel unit or individually, by means of compressed air biased hydraulic...
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4376416 |
Convertible sailboat/motorboat
A convertible sailboat/motorboat is disclosed which has capability for displacement movement under maximum speeds typical of the maximum for displacement boats as a function of their size,...
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4316425 |
Lifting keel for sporting sail boats
A lifting keel assembly for sailboats having a shaft obliquely inclined in forward and upward directions slidably receiving the lifting keel, the upper area of the lifting keel being provided with...
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4297757 |
Marine rescue capsule
A marine capsule for sea rescue and transportation having a generally spherical configuration and on its sides hermetically closed hatches of tempered glass and a sun-reflecting signal-sending...
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3951090 |
Hydraulic system for raising and lowering keel
The hydraulic system for raising and lowering a heavy keel comprises a cylinder, a piston movable in the cylinder and connected to the keel, and an accumulator for supplying hydraulic fluid at a...
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3776171 |
VESSEL HAVING A CONTROL FIN, FOR EXAMPLE, A KEEL OR RUDDER, AND MECHANISM FOR USE THEREIN
This invention relates to a vessel having a control fin which is fixed to or integral with a shaft rotatable about its longitudinal axis in a bearing attached to the vessel, the shaft being...
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3547065 |
KEEL BOAT
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3516100 |
AUTOMATICALLY ADJUSTING SKEG FOR SURFBOARDS
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D130389 |
Title is not available
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5860381 |
Variable draft tandem appendages for yachts
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3381648 |
Retractable centerboards for yachts
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3371737 |
Controlled height aerodynamic and hydrodynamic baffles for air cushioned vehicles
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3304898 |
Ship controls
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3110281 |
Extensible keet construction
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3074368 |
Retractable twin keel
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