Methods and systems are provided for draining water from the interior of a watercraft via a drainage valve system. In one example the drainage valve system has an outer frame housing an inner ball valve. The drainage valve system is adapted to be slidable between a first and a second position.

Methods and systems are provided for draining water from the interior of a watercraft via a drainage valve system. In one example the drainage valve system has an outer frame housing an inner ball valve. The drainage valve system is adapted to be slidable between a first and a second position.

In one example, a method includes positioning, within a mold, a device with a movable element that defines a portion of a volume, and the volume is contained within the mold, as part of a molding process, at least partly defining a molded watercraft by introducing plastic into the mold, disposing the plastic about the movable element, and with the movable element, excluding the plastic from the portion of the volume that is defined by the movable element so as to define a recess and an undercut that are integral with the watercraft and extend lengthwise with respect to a centerline of the watercraft, and the recess and undercut are integral, and communicate, with each other.

In one example, a method includes positioning, within a mold, a device with a movable element that defines a portion of a volume, and the volume is contained within the mold, as part of a molding process, at least partly defining a molded watercraft by introducing plastic into the mold, disposing the plastic about the movable element, and with the movable element, excluding the plastic from the portion of the volume that is defined by the movable element so as to define a recess and an undercut that are integral with the watercraft and extend lengthwise with respect to a centerline of the watercraft, and the recess and undercut are integral, and communicate, with each other.

A hull configuration has a bow and a stern, and is for use in a single or multiple hull vessel. The hull configuration comprises: a pair of cutting edges, each cutting edge sloping rearwardly, downwardly and in an outwardly lateral direction, from the bow; a pair of keels, each keel extending longitudinally rearwardly and laterally inwardly from an end of a respective one of the cutting edges and converging at the stern; a pair of sidewalls, each sidewall extending generally upwardly from a respective one of the cutting edges and from a respective one of the keels, the sidewalls extending rearwardly to the stern; and a bottom channel defined between the cutting edges and between the keels. The channel comprises a forward portion having a concave upper surface and rearward portion having a planar upper surface. The channel decreases in width from ends of the cutting edges towards the stern.

The present invention relates to a polymeric composition suitable for watercrafts or nautical applications. The present invention relates also the use of a transparent polymeric composition for watercrafts. More particularly the present invention relates to a transparent (meth)acrylic polymer composition and relates also to a process for preparing such a (meth)acrylic polymer composition, its use in watercrafts and watercraft comprising it.

One example watercraft includes a blow-molded plastic hull in the form of a unified, single-piece, structure, and the structure of the blow-molded plastic hull defines first and second cutting paths. The watercraft also includes a sacrificial portion that is integral with the blow-molded plastic hull, and two different configurations of the sacrificial portion are respectively defined by the first and second cutting paths, and each of the two configurations of the sacrificial portion is removable from the blow-molded plastic hull so that a respective seating configuration is defined in the blow-molded plastic hull.

One example watercraft includes a blow-molded plastic hull in the form of a unified, single-piece, structure, and the structure of the blow-molded plastic hull defines first and second cutting paths. The watercraft also includes a sacrificial portion that is integral with the blow-molded plastic hull, and two different configurations of the sacrificial portion are respectively defined by the first and second cutting paths, and each of the two configurations of the sacrificial portion is removable from the blow-molded plastic hull so that a respective seating configuration is defined in the blow-molded plastic hull.

In one example, a watercraft includes a hull in the form of a unitary, single-piece structure that is substantially hollow, and made of plastic. A grip is provided that is integral with the hull and includes a recess that is formed in a skin of the hull and is integral with the hull, and the grip also includes an undercut that is formed in the skin of the hull proximate an edge of the recess. The undercut is integral with the hull and communicates with the recess.

A deep-drawn, marine hull having a sandwich structure and watercraft utilizing same are provided. The hull includes an outer skin having a waterproof outer surface, an inner skin having a compartment-defining outer surface and a shock absorbing, cellular core positioned between the skins. The skins are bonded to the core by press molding. The cellular core has a 2-D array of cells, each of the cells having an axis substantially perpendicular to the outer surfaces. Thickness of side walls of the hull is substantially uniform to maximize stiffness of the hull. The cells absorb energy of an impact at the outer surface of the outer skin by deformably crushing. Air trapped within cells which are not completely crushed or punctured by the impact provide the hull with buoyancy to allow the hull to float at the surface of a body of water.