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| Number | Title | Issue Date |
| 7841285 | Waterborne vessel with loop keel A vessel (10) for traveling on water comprises a hull (20) and a keel (30) comprising a member (34) depending from the hull, the member (34) comprising two limbs (44) each depending from a respective lateral side of the hull... | 11/30/2010 |
| 7513205 | Movable ballast in a sailing vessel An external adjustable ballast system for keeled sailboats comprising a weight that is designed for low hydrodynamic drag, mounted through a beam to a shaft running down the leading edge of the fin keel. Turning the shaft moves the weight to optimize hull trim, both... | 04/07/2009 |
| 7509917 | Apparatus and method to optimize sailing efficiency This invention provides improvements in the efficiency of a sailing vessel through the use of flaps, hydrofoils, or members on the keel of a sailing vessel. One or more are positioned at the top, or root of the keel of the vessel, which primarily generate a force in... | 03/31/2009 |
| 7435147 | Breakaway skeg for a marine propulsion device A marine propulsion device is provided with a breakaway skeg having first and second attachment points. The first and second attachment points are configured to result in the second attachment points disengaging from a gear case or housing structure prior to the fir... | 10/14/2008 |
| 7393256 | Fin assembly An integrally formed fibreglass fin assembly (1) including a base (2)—that is defined by broken lines (3,4)—for mounting the assembly to an object in the form of a surfboard (5). A primary fin (6) extends upwardly from base ( | 07/01/2008 |
| 7370596 | Kayak having stabilizing flares A kayak comprises a hull with a relatively narrow cross sectional underwater width for increasing speed and efficiency of the kayak moving through water and first and second pairs of convex surfaces for providing kayak stability. ... | 05/13/2008 |
| 7353763 | Ship A ship includes semi-bottoms that transition into the ship's sides, and a keel that extends downwardly from the semi-bottoms. The keel and semi-bottoms form an equivalent of 120 degree therebetween. Each of the sides is located in the same planar surface with the ap... | 04/08/2008 |
| 7326281 | Hydrogen storage tank A tank main body accommodates a heat exchanger including a heating medium pipe. A plurality of heat exchanger fins are coupled to the heating medium pipe to divide the interior of the tank main body into a plurality of spaces. A hydrogen storage alloy is provided in... | 02/05/2008 |
| 7323043 | Storage container associated with a thermal energy management system A container for storing hydrogen comprises an outer shell having an inlet for inputting hydrogen gas and an outlet for outputting hydrogen gas. A thermally conductive liner lines an interior of the outer shell. An inner hydride core is in communication with the inle... | 01/29/2008 |
| 7311576 | Adjustable watercraft fin apparatus and method having three degrees of freedom The three-degree of freedom fin apparatus and method described herein is for use on a watercraft (such as a surfboard) and allows adjustment of up to three degrees of freedom, including a translational degree of freedom along a longitudinal axis of the fin structure... | 12/25/2007 |
| 7244157 | High-lift, low drag fin for surfboard and other watercraft This invention discloses a fin, for use on a surfboard and other watercraft, of a low-drag, high-lift, high-aspect-ratio, low-sweepback-angle planform of symmetrical foil section, with a fit root section that has a forwardly projecting leading edge and cutaway at th... | 07/17/2007 |
| 7240632 | Personal watercraft center keel A personal watercraft having improved bottom hull shapes in general, and improved center keel shapes in particular. The center keel can have a substantial section over which the keel angle becomes sharper progressing from front to rear, and the concavities on either... | 07/10/2007 |
| 7210422 | Fin stabilizer to reduce roll for boats in turns method and apparatus The invention relates to a fin stabilization system adapted to minimize roll about the longitudinal axis of the boat during sharp cornering at very high speeds. In one form, equipment such as a machine gun is mounted to the bow of the boat and targets are adapted to... | 05/01/2007 |
| 7198532 | Fin attachment system A fin box for releasable attachment of a fin to the body of a surfboard or the like; said fin including a fin-tab associated therewith; said fin box adapted for insertion into and retention within said surfboard; said fin box further adapted for reception and releas... | 04/03/2007 |
| 7192323 | Stabilizer device A low profile stabiliser device for attaching to the under surface of a watercraft, typically a surfboard or a boat, including in combination a plurality of stubby keel members joined by one or more transverse members spaced from the bottom surface of the watercraft... | 03/20/2007 |
| 7188008 | System for controlling the operation of at least one aircraft engine A system for supervising the speed of at least one engine of an aircraft includes three independent information sources determining first, second and third values for an aerodynamic parameter of the aircraft and precision information indicating the precision of thes... | 03/06/2007 |
| 7182661 | Detachable surfboard fin system A system for attaching fins to surfboards that utilizes fixing elements embedded in the body of the board, the elements having slots that receive footings extending from the end of the fin. The footings are removably secured by a passive wedge clip fixing system, en... | 02/27/2007 |
| 7165501 | Sail conversion kit and method for small watercraft An assembly for converting a non-sailing boat to a sailboat comprises a sailing keel adapted to be removably attached to the keel of a boat, a first and a second support frame, one or more straps connected on a first end to the sailing keel and connected on a second... | 01/23/2007 |
| 7121911 | Surfcraft removable fin system improved plug installation A surfcraft fin system utilizing a rib between fin anchors. The rib sets the distance between the anchors eliminating the need for a manufacturing jig. The rib is removed during the surfcraft manufacturing process resulting in multiple fin anchors adhered into the s... | 10/17/2006 |
| 7112239 | Gas storage apparatus A hydrogen storage apparatus that includes multiple gas storage tanks that each house a storing/adsorbing material and through the interior of which a fluid travels is provided. The gas storage apparatus 10 includes roughly cylindrical gas storage tanks 20... | 09/26/2006 |
| 7104211 | Watercraft stabilizing device A device for stabilizing boats and other watercraft that is generally blade-shaped and attaches to the body or hull of the boat. The stabilizing device projects generally outwardly and downwardly from the boat and is pivotally connected along the vertical axis at th... | 09/12/2006 |
| 6935910 | Watersport board fin assembly and methods of using same Fin assemblies for a variety of watersport boards including wakeboards, sailboards, surfboards and the like. The fin assemblies include a fin cap, at least one fin base and at least one locking member. Fin assemblies are secured to a watersport board by passing at l... | 08/30/2005 |
| 6918806 | Safety fin over mold system and safety fin sleeve for surfboard and other recreational vehicles A fin for an recreational device including: a rigid fin core having opposite sides, at least one edge and a base; at least one registration post on each of the opposite sides of the core, and a flexible material at least partially covering the core, wherein the flex... | 07/19/2005 |
| 6886481 | Pivotable bulb mounted foil for sailboats A pivotable deployable bulb mounted foil apparatus for a sailboat can pivot a foil mounted within a keel bulb remotely as needed to provide lateral resistance for the sailboat. The foil or foils can be rotated between a nested position for greater speed when the foi... | 05/03/2005 |
| 6796259 | Sailboat rotatable keel appendage For eliminating the dynamic drag of the member which supports the ballast by completely enveloping it with a indispensable component of the sailing vessel, namely, the hollow rotatable monolithic rigid hydrodynamic fin, and thereby reducing the dynamic drag of the c... | 09/28/2004 |
| 6767266 | Stabilizing element for use on mobile devices A stabilizer for a mobile device includes a first element that has a center-plane and an upper end for attachment to a bottom surface of the mobile device. The stabilizer also has a hollow tubular element that has a center-plane. The hollow tubular element is connec... | 07/27/2004 |
| 6764364 | Surf craft snap-in fin system A system for attaching fins to surfboards and other surf craft utilizing plugs embedded into openings in the body of the board, these plugs having slotted openings which receive tapered tabs protruding from the bottom surface of the fin. The tabs are removably secur... | 07/20/2004 |
| 6752674 | Sportboard fin attachment system A sportboard fin attachment assembly in accordance with the present invention includes a plug that is inserted into the cavity of a socket to define an enclosure. The enclosure is embedded into the underside of a sportboard so that the top wall of the enclosure is c... | 06/22/2004 |
| 6729256 | Personal watercraft A personal watercraft designed to advance suitably in a forward direction, to prevent an influence of side waves, and to incline to the turning center side when being steered by an operator from a forward direction to a turned direction. The personal watercraft incl... | 05/04/2004 |
| 6694907 | Sailboat hull and method for reducing drag caused by leeway A shaped hull with a fixed angle keel with respect to the hull that when heeled, orients the keel to an angle of attack substantially related to the heel angle. The angle of attack being sufficient to create on the keel a lateral force substantially equal... | 02/24/2004 |
| 6591772 | Slidable and impact absorbing keel A slidable, impact absorbing keel device for sailing vessels. A vessel hull and a fin keel are attached to a mutually slidable hull connection member and a slidable keel connection member respectively. A tongue-and-groove connection slidably connects the ... | 07/15/2003 |
| 6453836 | Sailboat keel with a rotatable secondary foil A fin-type sailboat keel with a ballast bulb and a single winglet projecting from the after portion of the bulb is disclosed. The after portion of the bulb, to which the winglet is affixed, rotates, allowing the winglet to be canted about the centerline o... | 09/24/2002 |
| 6397771 | Retractable wing keel for sailboats This invention pertains to a retractable wing keel for sailboats. A keel member is movably attached to the bottom of the sailboat, and a wing member is attached to the bottom of the keel member. In a first embodiment, the keel member is pivotally attached... | 06/04/2002 |
| 6379204 | Stabilizing element for use on mobile devices A foil having a stabilizing hollow element, the entire foil forming a wing- or fin-like shape. The hollow element may also have a leading edge that tapers to a defined point. The hollow element may also have a foil shape, running substantially parallel to... | 04/30/2002 |
| 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 allows the boat to achieve performance sailing at all points o... | 12/04/2001 |
| 6217402 | Stabilizing element for use on mobile devices A foil having a stabilizing hollow element, the entire foil forming a wing- or fin-like shape. The hollow element may also have a leading edge that tapers to a defined point. The hollow element may also have a foil shape, running substantially parallel to... | 04/17/2001 |
| 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 two lines of plates, continuous or sectioned, in this case... | 01/23/2001 |
| 6155894 | Off-center marine outboard skeg An outboard or stern marine drive assembly includes a skeg that is detachably secured to the lower gear case. The skeg plane is laterally off-set from the vertical plane that passes through the propeller thrust axis. One embodiment of the thin, high-stren... | 12/05/2000 |
| 6101963 | Rudder tab for suppression of tip vortex cavitation Cavitation of a hydrofoil element, such as the rudder of a marine vessel, om exposure to a body of water during onset flow at different angles to the chordal axis of the rudder profile, is suppressed by a tab on the lower end tip of the rudder. Such tab h... | 08/15/2000 |
| 6053789 | Surfboard fin pivotal mechanism The present invention discloses a limited pivotal fin system 12 for a surfboard 10. The fins self-pivot as the surfboard is turned by the body weight of the user. The pivotal fin system includes an upper stationary mounting portion 18 attached directly to... | 04/25/2000 |
