Abstract: The invention relates to a drop-stitch element in which at least one adhesive fold (9, 10) of variable depth is introduced into a flat drop-stitch component (8) such that the outer skin of the drop-stitch component can be folded on one side of the drop-stitch component or, according to the position of the fold, alternately on both sides of the drop-stitch component.

Abstract: An inflatable transport box including a base, a rear wall, and first and second side walls. The rear wall can be connected to the base along a folding edge and forming a single-piece drop stitch component with the base. The first and second side walls can be connected to opposite sides of the rear wall along folding edges, respectively. The side walls can be drop stitch components. The base, the rear wall and the side walls can be made of drop stitch material including an outer drop stitch wall and an inner drop stitch wall. Partial surfaces of the inner drop stitch wall of the rear wall and the side walls, respectively, can be arranged on both sides of a fold, and can be configured to come to rest on top of each other to form adhesive surfaces that are adhesively bonded together or welded to each other.

Abstract: The invention relates to an inflatable watercraft which consists of at least two inflatable parts that are joined together by means of holding strips or the like under preload. The invention also relates to a method for producing said inflatable watercraft and a gluing table that can be used in the production of the watercraft.

Abstract: The invention relates to an inflatable watercraft which consists of at least two inflatable parts that are joined together by means of holding strips or the like under preload. The invention also relates to a method for producing said inflatable watercraft and a gluing table that can be used in the production of the watercraft.

Abstract: An inflatable transport box including a base, a rear wall, and first and second side walls. The rear wall can be connected to the base along a folding edge and forming a single-piece drop stitch component with the base. The first and second side walls can be connected to opposite sides of the rear wall along folding edges, respectively. The side walls can be drop stitch components. The base, the rear wall and the side walls can be made of drop stitch material including an outer drop stitch wall and an inner drop stitch wall. Partial surfaces of the inner drop stitch wall of the rear wall and the side walls, respectively, can be arranged on both sides of a fold, and can be configured to come to rest on top of each other to form adhesive surfaces that are adhesively bonded together or welded to each other.

Abstract: The invention relates to a paddle device (10) for water vehicles, wherein a double or single paddle (2) is attached to a height-adjustable spar (1) so as to be movable in all directions, and the spar can be movably and detachably connected to the floating body (6) of a water vehicle, wherein the paddle device has a device (14, 16) for fixing the spar (1) in the direction of the bow and/or stern of the water vehicle; the paddle device (10) is used for force-saving paddling together with improved propulsion.

Abstract: The invention relates to a paddle device (10) for water vehicles, wherein a double or single paddle (2) is attached to a height-adjustable spar (1) so as to be movable in all directions, and the spar can be movably and detachably connected to the floating body (6) of a water vehicle, wherein the paddle device has a device (14, 16) for fixing the spar (1) in the direction of the bow and/or stern of the water vehicle; the paddle device (10) is used for force-saving paddling together with improved propulsion.

Abstract: A display body or picture frame wherein an image or a retainer panel supporting the image is received between two retainer sections formed at a rear bracket and pre-tensioned against a rear support, so that the image is clamped in a concave configuration towards the viewer.

Abstract: The invention relates to a rig for a windsurfing board in which the clew (8) of the sail (2) prior to tensioning and trimming of the sail (2) is fixed in location in a stern fitting (10) of the wishbone boom (3). The stationary fixing can either be done preprogrammed with the aid of a scale, whereupon the wishbone boom (3) is fixed to the mast in that it is pushed downwardly from above and engaged, or a fixed point is established which holds the clew (8). In this embodiment the trimming of the said (2) is made in the bow fitting (11) in that the connection (15) between the mast (1) and wishbone boom (3) is constructed in such a manner that the mast (1) is displaceable longitudinally to and fro with respect to the wishbone boom (3) and lockable.

Abstract: The present invention is with respect to craft such as surfboards and more specially sailboards made up of a board body of synthetic resin foam and with a synthetic resin shell and having fittings such as a daggerboard case, mast foot sleeves or sockets, connection points for foot straps, skegs etc. The sailboard is made up of a base element having all the fittings on it. The top part of a skin-compatible, flexible light-weight synthetic resin or plastic is fixed on the base element. All mechanical forces are taken up by the base element while the greater part of the buoyant volume is formed by the top part. The top part may more specially be so designed that it may be taken off the base element and an other one put in its place.

Abstract: A footloop for a windsurfing board having a deck with a top surface. The footloop is formed of a strap having opposite ends attached at the ends to the top surface of the board, including a device for attaching at least one of the ends to the deck which includes a releaseable mechanism for holding an end portion of the strap until a certain amount of force is exerted on the strap, whereupon the strap is released. The releaseable mechanism is adjustable for differing amounts of force and includes a fixed member permanently affixed to the board, a moveable member co-acting with the fixed member for holding the end portion of the strap and an adjustable device for locking the moveable member relative to the fixed member until the certain amount of force is exerted on the strap.

Abstract: A mast foot for sail boards having a universal joint for connection of the mast through the mast foot, with the sail board hull. The universal joint is joined up by way of a middle pin forming part of a bearing unit, which is designed to be fixedly joined to the hull. The middle pin is furthermore able to be moved, together with the universal joint, in relation to the rest of the bearing unit against the force of a spring in a direction generally normal to the deck of the sail board. The spring may be adjusted with respect to the force produced by it acting against upward motion of the middle pin. The bearing unit can be joined with the sail board hull in a sleeve by way of a turning joint like a bayonet connection.

Abstract: A sailboard having an unstayed rig comprises a mast mounted by a universal joint on a surfboard having a retractable keel. A sail having a neck and a lower bolt-rope is attached between the mast and nocks of spars fixed to the mast for the retention and adjustment of the mast and sail. The lower bolt-rope of the sail extends from the nocks of the spars to the mast at a downward inclination, the spars being fixed to the mast above the neck of the sail. The surfboard is provided with a coupling portion for coupling to a similar surfboard by a coupling member to form a composite surfer.