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Match Document Document Title
8166898 Wind-powered personal hydrofoil watercraft  
A personal wind-powered hydrofoil watercraft having a sail supported by a mast coupled to a buoyant body, where the mast is tiltable forward and backward but not side to side, in order to prevent...
7370593 Windsurfing catamaran vessel  
An improved windsurfing catamaran type vessel. The illustrated vessel has an improved steering mechanism that includes a relatively stiff but bendable plastic rod that is directly received within...
7285031 Fin systems  
FIG. 1 is an exploded view of the invention that consists of a reusable installation guide or router template, (13), which also doubles as a resin dam to secure receptacle, (9), into substrate...
7108571 Method and apparatus for attaching a fin to a small watercraft  
Apparatus is provided for attaching a fin to the underside of a small watercraft, such as a surfboard. The apparatus includes a holder which is attachable to the underside of the surfboard, so...
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...
6821173 Removable and adjustable surf fin system  
A fin plug assembly to receive and engage a fin includes a cavity, a cam with gears, and a worm gear. The fin plug assembly allows a quick and easy fore-aft adjustment of the fin. Disclosed also...
6789489 Sailboat with gimbaled mast and keel  
A modified mast and keel system for a sailing vessel. The mast is gimbaled to the hull, so that it can move in a pitch roll. A downward extension of the mast pivotally connects to a winged keel....
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...
6746292 Bottom fin for a watersports board  
A bottom fin for a watersports board such as a surfboard or a windsurfer board. It has an upper body portion having a leading edge that extends downwardly and rearwardly from its front end. The...
6739925 Hydrodynamic device  
A hydrodynamic device for use with a recreational water vessel such as a surfboard, disrupts a flow of water under the recreational water vessel. A channel member (12) and a fixing device (14) are...
6386933 Enhanced customizable surfboards with adjustable fins and methods for making the same  
A surfboard includes a body, a fin, a chamber disposed in the body, and a fastener. The fin is receivable in the chamber and projects from the body at a cant when received in the chamber. The...
6139383 Fin assembly  
A fin assembly [10] is provided for detachably removing a fin [12] in a surfboard [13]. The fin [12] has a mounting base [26] and spigots [22 and 23] projecting from front and rear positions on...
6135837 Water sports board  
A water sports board for use in supporting a person riding along on the top surface of the water. The elongated buoyant board has an elongated slot in its bottom surface for each of its fins. The...
6106346 Stabilizing fin for a water planing device  
The stabilizing fin includes an upper vertical stabilizer element, a hollow tubular element, and a lower vertical stabilizer element. The upper vertical stabilizer element has an upper end for...
6032600 Weighted daggerboard stabilizer for wind surfing apparatus  
A wind surfing apparatus formed with a hull supporting a mast and sail includes a removable daggerboard having a weighted mass in a lower end portion thereof to lessen the tendency of the hull to...
5873588 Assembled sail powered vehicle  
An assembled sail powered vehicle, including: a sail; a frame for supporting the sail, the frame including a plurality of elongated rigid frame members, a plurality of joint assemblies releasably...
5809926 Lifting fin  
A sloped hydrofoil (22) is mounted to the bottom of a sailboard or surfboard vertical strut (26) using a hinge joint (24). Hinge joint (24) allows reversal of sloped hydrofoil (22) slope in...
5533462 Keel arrangement for sailboat hull  
The invention provides an improvement in a keel arrangement for a sailboat hull, of the kind having an elongated ballast member spaced below the hull so as normally to extend horizontally and...
5471942 Hydrofoil sailboard with supercavitating canard hydrofoil  
Canard configured hydrofoil sailboards which are normally operated rolled to windward and without yaw and which employ a canard hydrofoil that tracks the water surface are of proven practicality....
5409408 Sailboard with reciprocating fins and umbrella type rotary parafoil sail  
The windsurf board comprise a revolving sail, reciprocating fins and single sided pedal. The revolving sail rotates a drum to drive the reciprocating fin. On the drum, there are multiple cycles of...
5309859 Hydrofoil device  
A hydrofoil sailboard comprising a conventional sailboard, without the usual tail skeg, equipped with two hydrofoils arrayed in a canard configuration, the combined lift of the foils being...
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...
5211123 Sailboard  
An improved sailboard in which the sail assembly is mounted to the board in a manner to allow pivoting about an axis inclined rearwardly and also about a horizontal pivot pin. The sail assembly is...
5195444 Sailboard  
The present invention relates to an apparatus designed to launch a sailboard out of the water while the sailboard is being sailed on the water. The apparatus comprises launching means including a...
5176091 Sailboard pontoon and mast rigging assembly  
A pontoon and mast rigging assembly for a sailboard. Four pontoons are arranged laterally about the sailboard hull and attached thereto by means of individual outriggers. Individual elastic straps...
5148761 Daggerfin adjustable sailboard skeg  
A wind propelled sailing apparatus having a sailboard hull adapted to support a user; a sail for propulsion of the sailboard hull and adapted to receive wind for motive power; a skeg positioned...
5143008 Sailboard  
A windsurfing board or sailboard is shown having a dash for supporting a sailboarder and an improved rudder gear assembly. The dash projects upward from the sailboard and is positioned such that...
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...
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...
5048440 Sailing apparatus  
A sailing apparatus includes a sail having a batten which is positioned relative to the mast by a coupling member which serves to induce a camber in the batten and enhance and stabilize the draft...
5022337 Lift producing device exhibiting low drag and reduced ventilation potential and method for producing the same  
A lift producing device is disclosed which is adapted to be connected to a vehicle to provide lift to the vehicle when the vehicle is moved relative to a first fluid medium having a first density...
4998494 Device for enhancing the buoyancy of sailboards and the like  
The bow portion of a sailbaord is insertable into a pocket at the underside of an inflatable delta-shaped hull having a width exceeding that of the sailboard. This results in a boat which is...
4924791 Adjustable sailboard  
A sailboard including hull, mast and rigged sail assembly and a foot operated rudder pivotally and rotatably mounted to the stern of the hull, with the rudder being adjustable longitudinally to...
4922845 Boom for a sailing device  
A multi-level boom adapted for use on a sailing device such as a sailboard. The boom comprises a lower portion in a wishbone type shape having a forward end adapted to be secured to a mast and an...
4771723 Sailboard assembly having a foot-operable steering assembly  
A sailboard assembly is disclosed which has a body on which the user stands, a mast, boom and sail assembly for propulsion of the board. The mast-boom-sail assembly is mounted to the board by a...
4753183 Double boom rigged windsurfer  
Wind propelled apparatus employing a mast and a sail, in particular a windsurfer for boardsailing is provided with a first boom, rigged in the usual fashion, and also having a second boom of...
4735163 Collapsible sail board  
A collapsible sail board is disclosed which includes an inflatable flotation member, a multisection mast, a collapsible boom, a sail, and a keel. The mast is detachably mounted on the upper side...
4730568 Waterborne craft  
A water borne craft includes a smooth rounded elongate sailboard type hull of little depth. The hull tapers down in width and in depth from its middle towards its ends and has smooth upper and...
4715304 Hydrofoil marine apparatus  
Hydrofoil marine apparatus comprising a hull, a pair of hydrofoils, each including first and second planar surface portions, pivotal mounting apparatus for mounting the pair of hydrofoils onto the...
4708079 Flex wing apparatus with resilient couplings  
A flex wing apparatus comprising a support, a mast coupled to the support and a sail. Battens are carried by the sail, and a coupling arrangement joins the leading edge of the battens to the mast...
4628853 Recreational watercraft  
A watercraft has a hull that is further supported above the surface while underway by a ski and integral hydrofoil, the hydrofoil is semicircular and is affixed to the hull and ski.
4539926 Board-like floating body  
A board-like floating body has a fixed mast, a swingable sail fastened to the mast, and an outrigger which is arranged so as to be swingable about an axis perpendicular to the upper side of the...
4508046 Wind surfing hydrofoil apparatus  
Wind surfing hydrofoil apparatus for enabling hydroplaning of a wind surfing board having a mast mounted centrally thereon between a front end portion and a rear end portion of the board, and...
4448142 Boom assembly for sailboard  
A boom assembly is pivotally attached to the mast of a sailboard for pivotal movement between a use position and a storage position. The boom assembly includes a boom bracket and a pair of booms...
4434737 Displacement, planing sailboard  
A highly efficient sailboard shape has a full displacement form for efficient light and upwind sailing and has an efficient planing form for high wind sailing with the conversion from displacement...
RE31167 Wind-propelled apparatus  
Wind-propelled apparatus in which a mast is universally mounted on a craft and supports a boom and sail. Specifically a pair of curved booms are arcuately connected athwart the mast and secure the...
4369724 Wingsail  
A low drag and high lift sail has a fabric skin suspended by an edge tension device able to control forward and trailing edge tension to tune and reverse the airfoil section. The fabric skin is...
4331093 Composite wind surfboard  
Two single surfboards (11, 12) are linked and assembled together in tandem fashion by a linking member (13) of elongated shape located underneath the two single surfboards (11, 12) and secured at...
4311107 Wind propelled apparatus  
An improved wind-propelled apparatus is disclosed which includes a body mounting a stub mast generally orthogonal thereto. The stub mast is mounted in a well formed on the body and secured by a...
4253209 Sail boards  
A transportable sail board has one or more inflatable bladders, and an envelope subdivided into plural demountable longitudinal sections. Rigidifying elements cooperate with bladder and envelope...

Matches 1 - 50 out of 55 1 2 >