Abstract: A surfboard includes a core covered with a laminate and having curved perforations in the deck area and the tail area of the surfboard, in order to prevent air blisters from forming between the core and laminate. The curved perforations are deformable under pressure to minimize the opening of the perforations to inhibit liquid from entering and maximizing under zero pressure to allow the maximum amount of trapped liquid and gasses from escaping. The core is formed from an extruded closed-cell polystyrene foam block that has been shaped by restraining it against a shaped form using shaped restraining tools and straps, and heating it; and by cutting using a hot wire. The core is laminated with FIBERGLAS® and epoxy resin, and the perforations are formed using a perforating tool that has a planar or curved working surface and one or more heated needles extending perpendicularly from the working surface.

Abstract: A foldable seat back includes a base, a back plate and a bracket. The base defines a positioning groove therein. The back plate is pivoted on the base, allowing the back plate to be positioned in at least one folded up state and a folded down state. The bracket has one end pivoted on a rear side of the back plate, and the other end releasably engaged in the positioning groove of the base to sustain the back plate in the folded up state.

Abstract: Embodiments of water activity board 10 that may be configured with several components 210A-H to form a WABS 200, where the components 210A-H may be securely and removably coupled to the board 10 via one or more rail modules 100A-I. Other embodiments may be described and claimed.

Abstract: A surfboard includes a core covered with a laminate and having curved perforations in the deck area and the tail area of the surfboard, in order to prevent air blisters from forming between the core and laminate. The curved perforations are deformable under pressure to minimize the opening of the perforations to inhibit liquid from entering and maximizing under zero pressure to allow the maximum amount of trapped liquid and gasses from escaping. The core is formed from an extruded closed-cell polystyrene foam block that has been shaped by restraining it against a shaped form using shaped restraining tools and straps, and heating it; and by cutting using a hot wire. The core is laminated with FIBERGLAS® and epoxy resin, and the perforations are formed using a perforating tool that has a planar or curved working surface and one or more heated needles extending perpendicularly from the working surface.

Abstract: A lightweight surfboard that is rigid yet provides uniform flex characteristic without the use of a traditional wooden stringer includes a stringerless blank foam and a set of channels shaped into a top portion of the body of the surfboard. The set of channels comprises a pair of adjacent, axially extending elongated concave grooves that run along the length of the set of channels, meet at their end points and form a convex center section. The convex center section of the set of channels provides the support to prevent the board from breaking due to the bending of the surfboard while being ridden on the wave. A laminating layer may be glassed on the set of channels for additional strength. The laminating layer may include fiberglass cloth, Kevlar, carbon fiber or any suitable material.

Abstract: A surfboard includes a core covered with a laminate and having curved perforations in the deck area and the tail area of the surfboard, in order to prevent air blisters from forming between the core and laminate. The curved perforations are deformable under pressure to minimize the opening of the perforations to inhibit liquid from entering and maximizing under zero pressure to allow the maximum amount of trapped liquid and gasses from escaping. The core is formed from an extruded closed-cell polystyrene foam block that has been shaped by restraining it against a shaped form using shaped restraining tools and straps, and heating it; and by cutting using a hot wire. The core is laminated with FIBERGLAS® and epoxy resin, and the perforations are formed using a perforating tool that has a planar or curved working surface and one or more heated needles extending perpendicularly from the working surface.

Abstract: Tills disclosure relates to a windsurfing board kit (100) for assembling windsurfing boards of different types. In light winds a relatively large windsurfing board is suitable, whereas in strong wind conditions a smaller windsurfing board is suitable, in addition, in fight winds a relatively large sail is suitable, whereas a relatively small sail is suitable in strong wind conditions, in light winds a relatively large board with a centerboard fin is suitable, whereas in strong wind conditions a smaller board without a centerboard fin is suitable. This disclosure enables assembling windsurfing boards of different sizes and different types. In addition, the disclosure enables adjusting the sail area of a sail for lire type of windsurfing board.

Abstract: An inflatable watercraft comprises a motorized cassette and at least one inflatable chamber. The at least one inflatable chamber is foldable relative to the motorized cassette at least when the inflatable watercraft is in a deflated configuration. The motorized cassette includes a motor, an impeller, at least one battery, and a pump configured to inflate the at least one inflatable chamber. The pump can include a reversible pump configured to deflate the at least one inflatable chamber.

Abstract: Tills disclosure relates to a windsurfing board kit (100) for assembling windsurfing boards of different types. In light winds a relatively large windsurfing board is suitable, whereas in strong wind conditions a smaller windsurfing board is suitable, in addition, in fight winds a relatively large sail is suitable, whereas a relatively small sail is suitable in strong wind conditions, in light winds a relatively large board with a centerboard fin is suitable, whereas in strong wind conditions a smaller board without a centerboard fin is suitable. This disclosure enables assembling windsurfing boards of different sizes and different types. In addition, the disclosure enables adjusting the sail area of a sail for lire type of windsurfing board.

Abstract: A windsurfing board may include an elongated hull having an upper deck side, a bottom side, a geometrical midpoint on the bottom side, a geometrical axis x extending through the midpoint and along the length of the elongated hull, a geometrical transverse axis y extending through the midpoint and in a direction that is perpendicular to the axis x, and a geometrical vertical axis z extending through the midpoint and in a direction that is perpendicular to both the axis x and the axis y. The hull may include one single hull body. The windsurfing board may also include a universal joint and at least one lateral resistance inducing projection projecting from the bottom. The bottom side of the windsurfing board may be symmetrical around the axis y, so that the parts of the bottom side that are divided by the axis y are mirror images of each other.

Abstract: This invention relates to a novel method and a novel inflatable flotation device for the method which are used in association with water sports boards such as kite boards, surfboards and the like, for the purpose of uprighting the water sports boards when inverted and encouraging the water sports boards to be moved by the wind in the direction of a water sports board rider when the rider becomes separated from the water sports board.

Abstract: A step shape in a planing hull for water craft and more particularly for sailboards, surfboard or PWC for increasing the lift in front of the step and decreasing it in back at high planing speed, which has dynamic lift directly behind the step when the hull is traveling at a transition speed between displacement mode and planing mode, but at high planing speed it does not have lift directly behind the step. The hull has increased speed because the lift behind the step at transition speed allows the position of the step to be moved forward and in one embodiment has cambered surface (9) in front of the step. This step does not go across the full width of the hull such that there is a continuous planing surface in front of the fins or other means, which it is desirous that they not ventilate, and fin or other means has more ventilation resistance in another embodiment.

Abstract: An improved structure for a sport board comprises: a first layer, which is a low density foam layer and has a first surface and a second surface; a second layer, which is a hardened layer, a first surface of the second layer being joined the second surface of the first layer; a third layer, which is a low density foam layer, a first surface of the third layer being joined a second surface of the second layer; and a cover layer, which is a waterproof layer, a first surface of the cover layer being completely joined the first surface of the first layer and a second surface of the third layer.

Abstract: High performance of a sailboard is achieved over a wider range of wind and water conditions by providing a hull having two or more planing surfaces which may differ in shape and/or aspect ratio. Drag due to suction at steps between planing surfaces is reduced by venting to the air. Cusp shaping of the respective planing surfaces can reduce and stabilize the angle of attack at the displacement/planing transition without causing fore-and-aft pitching effects known as porpoising. By confining water under the planing surfaces to reduce lateral outflow thereof through increased downward curvature of the bottom of the board, winglets, asymmetrical fins, fences and the like, the effective width and aspect ratio of the wetted area may be altered beyond that of the actual geometry of the planing surfaces to further increase lift and reduce drag while providing additional sources of lift at displacement, transitional and planing speeds.

Abstract: The present invention relates to a twin sailing board characterized in including a pair of surfboards (10, 12) adjacently disposed in a lateral direction, plate-like bodies (14, 16, 18) detachably secured to the surfboards (10, 12) by a screw (26), which is screwed with a mast end securing screw (MT) being movable in front and end directions of the surfboards (10, 12) within grooves (10d, 12d) provided on respective top surfaces of the pair of the surfboards (10, 12), a rig (24) including at least a mast (24c), which is connected to assume any inclined attitude by an engaging portion (30) fixed at substantially center of the plate-like bodies (14, 16, 18), a sail (24a) being set up on the mast (24c), and a boom (24b) circularly provided on the mast (24c) in such a manner that the sail (24a) is placed inbetween, and a rod-shaped member (20) erected on the plate-like bodies (14, 16, 18) at the further front side than the mast (24c) and whose leading edge is provided with a first ring member (20a).

Abstract: The invention is directed to a molded foam sports board made by steps: molding a foam core having a molded contour surface; laminating an extruded adhesive resin layer to a polyolefin foam sheet layer forming a film foam laminate; and thermoforming and heat laminating the film foam laminate to the molded foam core by pressing the molded foam core towards the film side of the film foam laminate and mating against the profile of a thermoforming bottom die surface. The board has a thermoformed polyolefin foam skin having an outer surface and an inner surface, a molded foam core having a molded contour surface, an extruded adhesive resin layer bonding the inner surface of polyolefin foam skin layer to the molded contour surface of the molded foam core. The molded foam core may comprise homopolymer or copolymer of expanded polystyrene foam, expanded polyethylene foam, expanded polypropylene foam and polyurethane foam.

Abstract: 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 one or more guiding passageways or grooves formed in the plastic hull of the vessel. The plastic-to-plastic interface between rod and groove provides relatively low friction interengagement as the rod moves. The groove is open to ambient water, which will further reduce the friction. The rod has stiffness/flexibility characteristics that allow it to turn around relatively large radii while still being able to span relatively short distances without significant bending. A manual operative control member is pivotally mounted on the hull and connected to the rod in a manner which multiplies the force applied by the use; this provides the magnitude of force needed to move the rod with minimum exertion by the user.

Abstract: An aquatic gliding board which incorporates a subassembly that includes a hollow inner shell which is covered with a casing made of foam capable of being machined. The invention also relates to a hollow gliding board, such as a surfboard, that includes at least one longitudinal partition, such partition(s) connecting upper and lower portions of the subassembly. The partition(s) is (are) made of a foam, such as an elastic foam.

Abstract: A method of manufacturing an apparatus, such as a board, is provided where a shell is formed in a forming mold cavity and the shell is substantially filled with a core in a filling mold cavity that substantially prevents distortion of the shell during filling.

Abstract: The present invention discloses a seat board for board kiting that is made of a substantially high durability of material, having a seating recess thereon, thereby permitting a rider to enjoy the board kiting in a convenient way. The seat board for board kiting that has a seating recess formed at an upper central portion thereof, is in a shape of a generally small boat and has a kite fixed thereto to thereby obtain a propelling force, the seat board including: a body made of a polystyrene foam material; a resin layer made of fiber glass and formed on the external surface of the body for preventing the damage caused upon collision of the body against an external object; and kite fixing means provided slidably in the seating recess for fixing the kite.

Abstract: A sports board that includes an expanded-polystyrene sports board core. A composite top skin is heat bonded to the top surface of the expanded polystyrene sports board core. Composite side rail skins are heat bonded to side rails of the expanded polystyrene sports board core. A composite slick bottom skin is heat bonded to a bottom surface of the expanded polystyrene sports board core.

Abstract: A hollow gliding board having an outer shell that demarcates at least one inner cavity, and having at least one inertial mass.

Abstract: A structural subassembly provided to produce an aquatic gliding board. The subassembly includes a hollow inner shell which is covered with a casing made of foam capable of being machined. The invention also relates to a method of making such a subassembly and to a board made by covering the preceding subassembly with a layer of resin-coated fibers.

Abstract: A hollow gliding board having an outer shell that demarcates at least one inner cavity, and having at least one inertial mass.

Abstract: A method for manufacturing a structural sub-assembly for a gliding board, such as a surfboard, as well as a method for manufacturing such gliding board, the method including at least: forming at least two shell elements, and assembling shell elements with a resin foam. The invention is also directed to the sub-assembly and to the gliding board formed by such methods.

Abstract: High performance of a sailboard is achieved over a wider range of wind and water conditions by providing a hull having two or more planing surfaces which may differ in shape and/or aspect ratio. Drag due to suction at steps between planing surfaces is reduced by venting to the air. Cusp shaping of the respective planing surfaces can reduce and stabilize the angle of attack at the displacement/planing transition without causing fore-and-aft pitching effects known as porpoising.

Abstract: High performance of a sailboard is achieved over a wider range of wind and water conditions by providing a hull having two or more planing surfaces which may differ in shape and/or aspect ratio. Drag due to suction at steps between planing surfaces is reduced by venting to the air. Cusp shaping of the respective planing surfaces can reduce and stabilize the angle of attack at the displacement/planing transition without causing fore-and-aft pitching effects known as porpoising.