Abstract: A collapsible boat hull 10 has a pair of bottom panels 12, 14 with a first continuous hinge along an inner edge thereof 16 and a second continuous hinge 17, 19 along each outer edge thereof connecting to respective side panels 18, 20. A flexible material 30 forms the hinge line, supported either side by a support material 36, 38. The flexible hinge accommodates curvature of the panels when the hull is erected to its boat shape. The support material can be glass fibre or polymeric material, such as polyethylene, PVC or polypropylene. The hinge can be ‘W’ shape in cross section and can form a ridge 40 into the boat, and can be bonded to the respective panels e.g. by glass fibre to the panels. Hinge strengtheners/protectors can be provided, such as additional ribs 52, 54 bonded to or integral to the hinge protective material.

Abstract: The invention provides for a sandwich-type layered structure including at least one first core layer made of cellular material, a first reinforcing layer connected to a first surface of the first core layer, and a second reinforcing layer on the side connected to the second surface of the core layer, the layered structure including, between the first core layer and the first reinforcing layer, at least one compressed foam layer connected to these two layers.

Abstract: The invention proposes a gliding board including a sandwich-type layered structure comprising at least one first core layer (12) made of alveolar material, a first reinforcing layer (14) connected to a first surface of the first core layer, and a second reinforcing layer (14) connected to the second surface of the core layer, characterized in that the layered structure is reinforced at least locally by at least one compressed foam layer (16) that is arranged between the first core layer (12) and the first reinforcing layer (14), and is connected to these two layers.

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

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 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: 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: The invention relates to a structural subassembly provided to produce an aquatic gliding board.

Abstract: Gliding board, especially a snowboard with a composite structure, constituted by a solid core about which are adhered, on the one hand, at least one upper mechanical resistance element, and on the other hand, at least one lower mechanical resistance element on which a gliding bottom surface surrounded with a peripheral metallic running edge is arranged, wherein the metallic running edge is constituted by at least one steel shaped element whose length is substantially equal to the periphery of the bottom surface, and whose free ends are affixed to one another at a butt connecting point via an effective mechanical linkage device, so as to obtain a running edge that closes over itself.

Abstract: A gliding board for use in snowboarding. The board includes two off-centered portions located on either side of a central portion or middle sole along a longitudinal axis of the board. At least one off-centered portion of the board includes at least one reinforcement that provides the off-centered portion with a greater mechanical resistance during torsion, along the longitudinal axis, than the mechanical resistance during torsion of the middle sole along the same longitudinal axis.

Abstract: The invention relates to a shock absorption device comprising at least one elongated element for transmitting flexional forces, oriented longitudinally with respect to the ski and having a free end adapted to be displaced longitudinally during bias in flexion. The device comprises likewise: a housing rigidly connected to the ski, provided with an opening for the passage of the free end of the elongated element and an internal seat allowing for the free back and forth movement of the said free end in translation; at least one shock absorption plate guided in translation in the said seat, comprising at least one layer made out of flexible and/or viscoelastic material in direct contact with the free end; and an indexing means making it possible to select the number of small plates in the translationally latched position in this said seat, and whose layer of flexible and/or viscoelastic material is biased in shear during displacement of the free end in the seat.