A wave-shaped ramp has two ascending platforms and a curved platform. Each ascending platform has a ground end, a tip end, and a slope. The tip end is higher than the ground end. The slope connects the ground end and the tip end. The curved platform is mounted between the two ascending platforms. Two ends of the curved platform are higher than a middle of the curved platform. With the curved platform forming a cavity shape between the two ascending platforms, the wave-shaped ramp provides more varieties in height, and thereby the player can perform more fancy stunts on the wave-shaped ramp. Besides, the wave-shaped ramp is a combination of the ascending platforms and the curved platform, so the wave-shaped ramp is separable and is capable of being stacked for storage.

A modular ramp system includes a ramp component and a connector releasably joined to the ramp component. The ramp component has first and second inclined surfaces and a connecting portion positioned between the first and second inclined surfaces. The connector has a bottom side formed with first and second coupling sections connectible to the connecting portion. The connector is positionable in a first position in which one of the first and second coupling sections is releasably joined to the connecting portion of the ramp component, and the other of the first and second coupling sections is adapted to releasably couple to a ramp or an external structure, and is positionable in a second position in which the first and second coupling sections are releasably joined to the connecting portion of the ramp component.

A digital video ramp assembly incorporates process-formed structural LED tiles with modular components that join in a system of scalable structural LED tiles forming a complete LED display structure with integrated LED embedded tiles with interlocking and inter-trans-positioning features sometimes requiring additional structural framing.

Described herein is a modular skate system that includes at least one modular skate component comprising a major surface, a core comprising a body formed from a first material, an outer layer formed from a second material, the outer layer surrounding at least a portion of the core, wherein the first material is different from the second material, and wherein the major surface comprises the outer layer.

A digital video ramp assembly incorporates process-formed structural LED tiles with modular components that join in a system of scalable structural LED tiles forming a complete LED display structure with integrated LED embedded tiles with interlocking and inter-trans-positioning features sometimes requiring additional structural framing.

The enclosed invention is a portable professional regulation size skate board and snowboard half pipe park. The park is made up of two mobile trailer units. Each unit consisting of a quarter ramps, performer platform with safety railing and a weather canopy cover. One unit consists of spectator platform and spiral staircase for climbing to the platform.

Each unit comprising of structural steel framing is mechanically operated using hydraulics to raise and lower the unit on the a axis and raise and lower the quarter ramps on V axis, safety rails followed by horizontal movement on the X and Y axis.

Once placed, the units, facing each other in a parallel position, hydraulically raised, then quarter ramps lowered and then hydraulically moved in the horizontal position connecting the two individual quarter ramps to be mechanically attached providing a smooth surface transition as required for the professional skate board performer.

A method of extracting surface composition for a clay-like athletic field is disclosed. The method includes extracting a by-product i.e., coal shale, which is a sedimentary rock that has undergone high-temperature combustion during the coal mining process. The coal shale is crushed to predefined size particles. The coal shale is dried for a predetermined time period. Subsequently, the dried coal shale is screened via mesh screens of different grain sizes to separate the dried shale for use as the surface composition for the clay-like athletic field, such as a clay tennis court. The coal shale is used in place of a traditional crushed brick.