A system, method, and apparatus for an athlete to variably control the flexibility and stiffness parameters of a piece of athletic equipment to select a desired performance characteristic of the equipment based on the stiffness parameter. According to certain embodiments discussed herein, an item of sporting equipment may be embedded, impregnated, lined, or encased using nitinol components, wherein the nitinol components may themselves be treated using a specific method in order to achieve the desired transformation results, as described below.

Disclosed are an optical rotating wheel and a self-balancing vehicle. The optical rotating wheel of the present application includes a stationary component, a moving component, a light source connected with the stationary component, and a laser plate connected with the moving component, in which the stationary component is fixedly connected with the vehicle body and relatively static with respect to the vehicle body, while the moving component is rotationally connected with the stationary component. Moreover, the laser plate is provided with a laser dot which displays a preset pattern under an illumination of the light source, and when the moving component rotates, the preset pattern rotates around the light source. In such a way, a dynamic optical pattern is obtained in the optical rotating wheel and self-balancing vehicle.

A human-machine interaction vehicle includes a vehicle body and a pair of wheels coupled with the vehicle body. The vehicle body includes a support frame, at least one pedal disposed on the support frame, a first position sensor, and a controller. The support frame is rotatably connected to the wheels. The first position sensor is configured to detect attitude information of the two pedals relative to the support frame. The actuation device drives the wheels to rotate based on the attitude information. The human-machine interaction vehicle includes a support frame, and the pedal is arranged on the support frame independently.

A device for generating a pulling, or drag, force. The device consists of a single large track, powered by a power source located on a bottom wall above said track; of which the power source is an electric or combustion engine, mechanically connected with a multitude of rollers. The device additionally consists of an elongated handle with a generally t-shaped or generally u-shaped distal end so as to be received and grasped by a human user. Additionally, side walls and an optional front and/or overhead wall may be utilized to protect the power source from the elements.

A motorized vehicle assembly includes an axle comprising a channel extending along a central axis of the axle, a socket positioned within the channel of the axle, and a motorized wheel configured to be mounted on an end the axle. The motorized wheel includes a boss configured to engage the end of the axle when the motorized wheel is mounted on the axle, an electric motor, a tire mounted on the rotor, and a plug positioned within the boss, the plug configured to engage with the socket when the motorized wheel is mounted on the axle. The electric motor includes a stator fixed to the boss and a rotor surrounding the stator, the rotor configured to rotate relative to the stator. The electric motor is configured to cause the rotor to rotate relative to the stator to cause the tire to rotate.

A method of mounting at least one spray gun assembly onto an arm of a line striper includes installing a first clamp onto the arm with the first clamp being connected to a first spray gun assembly and the first clamp having an opening. The first clamp is installed onto the arm by placing the arm within the opening of the first clamp without sliding the first clamp onto an end of the arm. The method also includes securing the arm of the line striper within the opening of the first clamp.

An electric weight sensing skateboard using one or more strain gauge systems to detect rider-induced strain on one or both trucks, an inertial sensor to detect accelerations and balance position, and wheel speed sensors. Throttle is controlled by rider position, for example, lean forward to increase speed, lean back to slow down. Several drive methods include a driver position detection velocity setpoint control, torque setpoint control, and direct velocity/torque control. A throttle remote is note required. Rider weight activates the motors.

A system for lighting a volleyball court has four corner light assemblies, two side center light assemblies, and four mid-court light assemblies. Each corner light assembly has an upper light fixture adapted to emit light outward and downward at a level generally below a player's eye level and a lower light element mounted in a manner to emit light outwards and upwards. Each side center light assembly has two lower light fixtures adapted to emit light outward and downward at a level generally below a player's eye level and an upper light assembly adapted to emit light outwards and upwards at a level generally above a player's eye level. Each mid-court light assembly has a light fixture adapted to emit light outward and downward at a level generally below a player's eye level. By ensuring that no light is emitted at a player's eye level, glare is significantly reduced.

An aluminum or aluminum alloy wheel hub having at least one display opening for electrically operated display device and at least one interior channel anodized to a sufficient electrically insulative thickness, the channel is dimensioned to receive at least one electrically conductive element of a compact generator. The display device can be a LED device. The wheel hub is especially suited for roller skate, in-line skate, and skate board wheels.

A self-propelled, one-wheeled vehicle may include a suspension system configured to dampen up and down motion of a board relative to the axle of a central wheel assembly when the vehicle encounters obstacles and bumps on a riding surface. Illustrative suspension systems include a shock absorber, a rocker, a pushrod, bell cranks, and/or a swingarm that couple the axle to the board. The suspension system may be disposed completely below a foot deck of the vehicle.