A method and system for use in the game of football to determine ball placement and position, as well as first down demarcations, is described, with various embodiments configured to track the location of a football to determine its position on the field and to determine and display the first down demarcation on the field. Certain embodiments employ software to assist in performing placement determinations, distance determinations, track movement of the ball, first down markers, as well as light emitting modules along a track that extends parallel to the field.

An electric vehicle may comprise a board including first and second deck portions each configured to receive a left or right foot of a ride, a wheel assembly disposed between the deck portions and including a ground-contacting element, a motor assembly mounted to the board and configured to rotate the ground-contacting element around an axle to propel the electric vehicle, at least one sensor configured to measure orientation information of the board, and a motor controller configured to receive orientation information measured by the sensor and to cause the motor assembly to propel the electric vehicle based on the orientation information. The electric vehicle may include exactly one ground-contacting element, and the motor may be a hub motor.

Provided is ring equipment made on the basis of an idea going beyond conventional knowledge, which is capable, not only of enhancing the mood of spectators and further creating feeling of high tension and interest of a match, but of making it possible for players to effectively use the ring equipment for the handling of the match, or the like, thereby making the match richer in content. A rope strung between corner posts includes a rope body having translucency and a light emitting member buried in the rope body. The ring equipment is configured so that light from the light emitting member is passed through the rope body and emitted outward in the radial direction of the rope body.

A method and system for use in the game of football to determine ball placement and position, as well as first down demarcations, is described, with various embodiments configured to track the location of a football to determine its position on the field and to determine and display the first down demarcation on the field. Certain embodiments employ software to assist in performing placement determinations, distance determinations, track movement of the ball, first down markers, as well as light emitting modules along a track that extends parallel to the field.

An electric vehicle may comprise a board including first and second deck portions each configured to receive a left or right foot of a ride, a wheel assembly disposed between the deck portions and including a ground-contacting element, a motor assembly mounted to the board and configured to rotate the ground-contacting element around an axle to propel the electric vehicle, at least one sensor configured to measure orientation information of the board, and a motor controller configured to receive orientation information measured by the sensor and to cause the motor assembly to propel the electric vehicle based on the orientation information. The electric vehicle may include exactly one ground-contacting element, and the motor may be a hub motor.

A wheel assembly configured to be rotationally engaged with a supported structure, the wheel assembly having a light up wheel hub having a light up ring, the light up ring having at least one light emitting device and a generator body configured to be in electrical communication with each light emitting device and an outer shell configured to be engaged with the light up ring, such that each light emitting device is enclosed within the outer shell, wherein the rotation of the light up wheel hub about a wheel rotational axis is configured to generate electrical energy to power each light emitting device. Thus an advantage is that each light emitting device may be sealed within the outer shell, protecting it from debris, fluids and other hazards. The light up wheel hub may be configured to engage with sinusoidally shaped wheel rims through selective adjustment of light emitting device positioning.

A powered skateboard having a powered wheel. The powered wheel formed of a motor within tire of the wheel. The powered wheel fixed to a truck of the powered skateboard. The powered skateboard including at least one onboard battery to provide electrical power to the powered wheel.

An ultraviolet court-illumination system is used to light a playing court and any related equipment in a fluorescent manner. The system includes at least one playing court, a first plurality of ultraviolet (UV) court lights, a plurality of fluorescent game boundary-markers, and at least one fluorescent game fixture. The playing court is used for playing games or sports. The plurality of fluorescent game boundary-markers is superimposed onto the playing court and is used to delineate the boundaries of the playing court. The fluorescent game fixture is mounted onto the playing court and may be a net, a goal, or any other fixture used to play the sport. Each of the first plurality of UV court lights is peripherally positioned about the playing court and is used to illuminate the fluorescent game boundary-markers and the fluorescent game fixture. The first plurality of UV court lights is powered by a power source.

An accessory assembly for a skateboard includes a bracket configured to be mounted to a first surface of a base plate of a skateboard truck. The first surface is opposite a second surface of the base plate, where the second surface faces a deck of the skateboard when mounted to the skateboard. The bracket includes a mounting hole and a receiving element, and is configured to span only a portion of a perimeter of the base plate. An accessory component includes a housing having an engaging element, the engaging element being configured to be removably coupled with the receiving element. An accessory is mounted to the housing.

In one example, a ski binding control and release assembly includes a motor, an actuator element connected to the motor, an arm operably engaged with the actuator element and selectively engageable with a toe piece of a ski binding, and a binding plate. The binding plate is configured to be mounted at least indirectly to a ski, wherein the binding plate is configured to slidingly engage a toe piece of a ski binding so that the toe piece is movable lengthwise relative to the binding plate when the toe piece and the binding plate are engaged with each other. Finally, a control system is provided that is operable to cause movement of the arm.