A foam product includes a foam core, a soft skin covering the foam core, and a base structure on which the foam core is disposed. The foam core of expanded beads has an outer surface on which some outermost beads of the expanded beads are exposed and bulging outward with different heights to form a bubbly texture. The foam skin has an inner surface attached to the outer surface of the foam core, and has at its inner surface a plurality of concave cavities each matedly surrounding a respective one of the bulging, outermost beads on the outer surface of the foam core.

Certain exemplary embodiments can provide a system comprising a plurality of discs coupleable to a first watercraft. Wherein, when the plurality of discs is coupled to the first watercraft, each of the plurality of discs deflects a flow of water along the first watercraft such that a partial hydrodynamic lift results as the first watercraft moves across a water surface compared to a second watercraft, the second watercraft not coupled to discs.

Certain exemplary embodiments can provide a system comprising a plurality of discs coupleable to a first watercraft. Wherein, when the plurality of discs is coupled to the first watercraft, each of the plurality of discs deflects a flow of water along the first watercraft such that a partial hydrodynamic lift results as the first watercraft moves across a water surface compared to a second watercraft, the second watercraft not coupled to discs.

The invention relates to a watercraft (10) having a hull which, in the area of the deck (13), has a support on which parts of the upper body of a user can rest and where the user can hold on to handles (20) preferably disposed in the bow area (11), wherein a flow channel (40) is assigned to the hull or the hull has a flow channel (40), wherein a propelling screw (41) is disposed in the flow channel (40), wherein the flow channel (40) has an intake port (33) and, downstream of the propelling screw (41), a jet outlet (43) in the stern area (12), and wherein a support body (50) is disposed on the stern area (12) in such a way that the support body (50) extends the support by means of its support surface (51). In such a watercraft, a considerable increase in traveling speed can be achieved if provision is made for at least one sliding surface (56) to be provided on the underside of the support body (50) and for the support body (50) to be rigidly connected to the hull.

The invention relates to a watercraft (10) having a hull which, in the area of the deck (13), has a support on which parts of the upper body of a user can rest and where the user can hold on to handles (20) preferably disposed in the bow area (11), wherein a flow channel (40) is assigned to the hull or the hull has a flow channel (40), wherein a propelling screw (41) is disposed in the flow channel (40), wherein the flow channel (40) has an intake port (33) and, downstream of the propelling screw (41), a jet outlet (43) in the stern area (12), and wherein a support body (50) is disposed on the stern area (12) in such a way that the support body (50) extends the support by means of its support surface (51). In such a watercraft, a considerable increase in traveling speed can be achieved if provision is made for at least one sliding surface (56) to be provided on the underside of the support body (50) and for the support body (50) to be rigidly connected to the hull.

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.

An inflatable stand-up paddle board (SUP) and a built-in inflation pump are provided. The inflation pump includes a pump body incorporated into a body of the SUP, an inflation assembly, and inflation and deflation valves in communication with an air chamber of the SUP. The body of the SUP includes first and second surfaces and a lateral confining band extending in a circumferential direction of the SUP and covering edges of the first and second surfaces. A mounting space may extend through the air chamber and the inflation pump may be mounted within the mounting space.

An inflatable stand-up paddle board (SUP) and a built-in inflation pump are provided. The inflation pump includes a pump body incorporated into a body of the SUP, an inflation assembly, and inflation and deflation valves in communication with an air chamber of the SUP. The body of the SUP includes first and second surfaces and a lateral confining band extending in a circumferential direction of the SUP and covering edges of the first and second surfaces. A mounting space may extend through the air chamber and the inflation pump may be mounted within the mounting space.

This invention relates in general to an improved foam blank for a surfcraft and in particular, to an improved reinforced foam blank and a method of manufacturing the same. The foam blank has a top blank face, an opposed bottom blank face, a pair of shaped rails extending between the opposed top and bottom blank faces at blank face edges, an enclosed core space and a midline axis extending between a nose region and a tail region and which divides the foam blank into two substantially equal regions. At least one longitudinally extending slotted aperture is formed in any one or more of the top, the bottom or the rails, such that the slotted aperture extends into the enclosed core space. At least one flexible spine is bonded to be fixed within the at least one longitudinally extending slotted aperture.