Class 114/127 - CENTERBOARDS

Subclass of Class 114 - Ships
Definition: Vessels having boards, plates, planks, etc., placed longitudinally
No. of patents: 39
Last issue date: 10/14/2008

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Number	Title	Issue Date
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
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
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
7128010	CBTF sailing yacht appendage retraction system A canting ballast twin foil (CBTF) sailing yacht constructed according to the invention includes a sailing hull, a laterally moveable ballast suspended beneath the hull that provides a counter heeling force when the yacht is underway, and fore and aft foils that pro...	10/31/2006
6991504	Surfboard fin mounting system Provided is a system including a fin box that allows surboard fins to be installed, removed or adjusted to the front or rear of the board within the box and a means for installing the box on the surfboard. More importantly, the fins can be installed in the fin box, ...	01/31/2006
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
6916220	Removable fin system A pivotal fin system, for use with an aquafoil, such as surfboards, body boards, wave skis, sail boards, wake boards and the like, comprising a pot (3) and a fin (2), having a tab (18) extending from the base (17) of the fin (2). T...	07/12/2005
6247985	Surfboard box cover In mounting of a fin on a surfboard, there is formed a through hole within the surfboard with the fin to be mounted within the through hole and extend from the underside of the surfboard. The through hole is normally open the top side of the surfboard. A ...	06/19/2001
5839700	Articulated fin An articulated fin of the present invention includes a nose section, a tail ection, an upper flexible control surface, and a lower flexible control surface. The upper and lower flexible control surfaces each span from the tail section to the nose section. ...	11/24/1998
5649846	Pivotable fin system A pivotable fin system, for use with an aquafoil such as a surfboard, comprising a plug and a fin having a main portion and a tab. The plug mounts in the surfboard, and has a central slot for receiving the tab. The tab has a reverse taper that matches a r...	07/22/1997
5503097	High performance centerboard system A movable centerboard for water craft capable of multiple settings having an upper position within the hull, a lower position at full depth below the hull and multiple settings therebetween such that the system is adapted to receive and operate the center...	04/02/1996
5480331	Flexible surfboard fin A flexible fin for surfboards, sailboards and other watercraft comprises a thin core sheet made of laminated fiberglass sandwiched between two slabs of closed-cell polyurethane foam. The flexible fin provides for sharper turns while increasing the buoyanc...	01/02/1996
5385495	Self adjusting water ski assembly A water ski fin extends through the rear of a water ski. Pivotally connected to a lower portion of the fin is a wing extending substantially perpendicularly from the fin. A device is connected to the wing that allows the wing to pivot and change its angle...	01/31/1995
5342231	Self adjusting water ski assembly A water ski fin extends through the rear of a water ski. Pivotally connected to a lower portion of the fin is a wing extending substantially perpendicularly from the fin. A linkage is connected to the wing that permits the wing from pivoting until the spe...	08/30/1994
5224435	Fin box assemblies for windsurfers A windsurfer board is formed, towards the tail end thereof, with a slot in which a box is fitted. The box provides a mounting for a fin which is movable, while in use, relative to the board in such manner as to permit simultaneous adjustment of the inclin...	07/06/1993
5195915	Sealing lip of plastic for the lower end of the inlet opening for a dagger board housing and dagger board, particularly of sailboards The lip-type seal for the bottom closure of the inlet opening (2) for dagger board housing (3) and dagger board (4), intended for sailboards, exhibits two mounting strips (6) of a hard plastic with a sealing lip (7) of an elastic plastic, countersunk on b...	03/23/1993
5181678	Flexible tailored elastic airfoil section A flexible airfoil section for a wing or a blade comprising a streamlined shape and an elastic structure whose stiffness distribution along its chord and span is tailored to provide a desirable cambered shape with proportional increases in camber with inc...	01/26/1993
5176096	Assembly for fastening a fin to a sailboard The assembly for fastening a fin to a sailboard comprises a fin receiving box secured in the sailboard and having an opening to receive a fin shaft. A conical or wedge seat is provided between the fin shaft and the opening in order to warrant a firm attac...	01/05/1993
5133681	Frangible sailboard fin retaining member A frangible sailboard fin retainer and method of releasably retaining a fin to a sailboard fin box including forming complementary openings in the fin and the fin box, inserting a bolt assembly having a bolt and a threaded female threaded member joining t...	07/28/1992
5129344	Actuating mechanism An actuating mechanism is provided for controlling external devices by means of coaxial actuating cables or other suitable linkages. The actuator includes an internal slide element movable to selected detent positions by means of a lever arm which pushes ...	07/14/1992
5036785	Lightning protection installation on a boat A lightning protection installation for boats comprising a copper lightning rod mounted on the top of the mast or, in the case of a power boat, mounted on the deck, a copper wire attached to the rod and running downwardly to a point where it is attached t...	08/06/1991
5030151	Flanged fin for watercraft The invention relates to fins for watercraft such as surfboards, surf-skis, sailboards, kayaks, canoes, skiffs, water-skis, and also "soft" plastic watercraft such as polyethylene boards. These fins have an apertured, basal flange; each fin being affixabl...	07/09/1991
4949919	Foil Hydrofoil families which have high lift and low drag coefficients. Induced vorticity is partly suppressed by introducing a longitudinal component of the flow directed from the foil tip towards the hydrofoil base at least in the area of the hydrofoil tip. ...	08/21/1990
4940438	Surfboard with angularly related fins A surfboard is provided with fins, at least one of which is canted at an angle to the longitudinal axis and also tilted relative to the surface of the board, and reinforcing fibers are applied to extend continuously from along the fin to along the board, ...	07/10/1990
4936243	Transom rudder seat This invention is a transom-mounted combination casting seat and anti-drift fin, herein called a transom fin seat. The transom fin seat includes a fin stem, a fin deployed at the bottom of the fin stem, a rigid or pivoting casting seat affixed to the top ...	06/26/1990
4805546	Retractable water board fin A generally trapezoidal fin (22) is pivotally fastened to a casing which can receive the entire fin, permitting total retraction of the fin. The casing is formed with at least one notch (42) for selectively positioning the fin relative to the casing. In a...	02/21/1989
4766830	Boat, especially a catamaran, with large deck space and collapsible frame A boat, especially a catamaran, having a rectangular collapsible frame with a one-man mast stepping structure. The tubular frame is comprised of fore, aft and central sub-frame assemblies which can be collapsed so as to be easily car topable and serve as ...	08/30/1988
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 position of the centerboard, and including two sealing lips,...	07/26/1988
4759552	Lip gasket of a synthetic resin, especially for the daggerboard well of a sailboard The lip gasket for the daggerboard well of a sailboard (1) exhibits two supporting strips (3) embedded in the board body on both sides of the daggerboard well opening (2), as well as two cover strips (5), terminating with the profile (4) of the underwater...	07/26/1988
4561371	Catamaran stabilization structure A catamaran stabilization structure for catamaran sailboats which includes a centerboard and dagger-boards. The centerboard has a double wing stabilizer with adjustable pitch. The dagger-boards protrude through each of the hulls. Each dagger-board has a s...	12/31/1985
4493665	Hydrofoil A fin which can be secured in the channel of a curved fin box in a plurality of locations. The fin has a grooved flange which mates with the open channel of the fin box. One wall of the channel has a groove which aligns with the flange groove and a fasten...	01/15/1985
4421492	Adjustable fin system A fin system for surfboards, wind surfers or similar sporting equipment having an elongated channel extending lengthwise underneath the board. The fin is adjustable in the channel by the interaction of a resilient finger cut out of the fin base with a rib...	12/20/1983
4377124	Sailboat with an inclinable keel board The invention relates to a sailboat with a keel board that is inclinable sideways. A single keel board is resiliently inclinable due to the effect of the water which rotates it about an axis disposed substantially in the vertical plane of longitudinal sym...	03/22/1983
4341176	Air foil with reversible camber A reversible airfoil generally wing-like in shape comprising at least two spaced apart rigid spars having at least two slots therethrough, bars projecting through the slots in each rigid spar, each end of each bar attaching to a flexible slat, and a commo...	07/27/1982
4325154	Surfboard fin A surfboard fin is disclosed which is formed of shaped plastic opposed members which are joined and sealed to form a hollow light-weight buoyant construction, which provides an external contour to reduce drag in surfboarding. The novel profiled plastic su...	04/20/1982
4280433	Underwater appendages for vessels A keel assembly or similar fin-like underwater appendage for a boat is provided which is adjustable to adapt its characteristics to the operating conditions of the boat, for example to optimize hull performance of a sailing boat on opposite tacks. The ass...	07/28/1981
4263866	Ski boat An elongated ski boat is provided for producing a relatively small, well-defined wake and a relatively smooth working table. The boat comprises an elongated hull which includes a bow, a stern, a port side, a starboard side and a transom. The hull comprise...	04/28/1981
4037279	Water ski A water ski comprising a water ski body having a forward end, a rear end, a top side and a bottom side, and a fin extending downwardly from the bottom side, wherein the fin has an elastic portion movable laterally of the water ski body under the action of...	07/26/1977
4029037	Process for reinforcing plastic material and products therefrom A plastics structure, such as the center-board for a sailing boat or a vehicle body panel, comprises a foamed plastics material containing arrays of high tensile steel reinforcing wires having a diameter in the range 0.040 to 0.125 inches and a yield stre...	06/14/1977

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Class 114/127 - CENTERBOARDS