SKATEBOARD COMPOSITE DECK Russian patent published in 2025 - IPC A63C17/02 

FIELD: skateboards.

SUBSTANCE: composite deck for skateboard relates to sports and recreation decks, namely to decks of sports roller boards – skateboards, and is intended for arrangement of feet of sportsman (skateboarder) from upper side, as well as for attachment of suspensions with wheels to lower side. Composite deck consists of core (1), upper composite layer (2) and lower composite layer (3), wherein middle part, as well as upper and lower parts of core (1) contain at least one layer of wood veneer (4, 5 and 6), orientation of fibres of which is parallel to longitudinal axis (7) of composite deck – longitudinal layers of wood veneer, and intermediate parts of core (1), located between middle and upper parts of core (1), as well as between the middle and lower parts of core (1) contain one layer of wood veneer (8 and 9), orientation of fibres of which is perpendicular to longitudinal axis (7) of composite deck – transverse layers of wood veneer, or intermediate parts of core (1) contain alternating at least one transverse (8 and 9) and at least one longitudinal layers of wood veneer. Inclusion in the upper, lower and middle parts of core (1) of at least one longitudinal layer of wood veneer (4, 5 and 6) in combination with upper (2) and lower (3) composite layers enables to achieve maximum strength of the composite deck at bending deformations due to action of moments and/or shearing forces on it. However, in addition to loads leading to bending deformations, during operation the composite deck can experience impact loads along the perimeter of its core (1), i.e. on its edge. In order to increase the resistance of the edge of the composite deck to such impacts, at least one transverse layer (8 and 9) is included in the intermediate parts of core (1). With such arrangement of wood veneer layers, upon impact on the surface of the edge of core (1), the component of the impact load normal to the surface of the edge of core (1) will be absorbed by the fibres of the wood veneer layers at an angle of at least 45 degrees to the direction of the greatest strength of the wood fibres (i.e. to direction along fibres) of at least one layer, which means reduction of impact load across fibres (direction of least strength) of wood veneer from 30 to 100 % depending on point of impact load application to line of edge of core (1). This results in reduction of edge chipping and extension of service life of composite deck as a whole. Intermediate parts of the core can be made of alternating transverse (8 and 9) and longitudinal layers of wood veneer, which makes it possible to control anisotropy of mechanical properties of core (1) in thickness. So, with an odd number of alternating layers, provided that the transverse layers in the intermediate part of the core are more than longitudinal layers, there is averaging of mechanical properties (reduction of anisotropy, i.e. strengthening of weak points and weakening of excessively strong ones) along the perimeter.

EFFECT: increased resource of composite deck.

10 cl, 7 dwg