Improved skateboards and methods of obtaining or providing skateboards with improved trucks. Trucks have two axles or axes, two primary wheels, and two secondary wheels, and skateboards have eight wheels, four in front and four at the rear portion of the skateboard. The four primary wheels support most or all of the weight of the skateboard when the skateboard is on a flat surface, and the two secondary wheels support the weight of one portion of the skateboard (e.g., front or rear) when the primary wheels cross a crack (e.g., a sidewalk contraction joint). In various embodiments, the secondary wheels are located outboard of the primary wheels. Further, in a number of embodiments, the axis of rotation or axle of the primary wheels remains parallel to that of the secondary wheels, whether the skateboard is going straight or turning.

An apparatus comprising a platform; a plurality of trucks coupled to the platform; and a roller assembly coupled to the platform, wherein the roller assembly is configured for an omnidirectional rotation, wherein the roller assembly is configured for an elastic biasing, wherein the roller assembly is driven by a motor.

To provide inline skates that prevent skidding when curving and turning, and enable stable curving turns to be performed while maintaining straight running speed. An inline skate has a plurality of running wheels arranged in a row in series in the running direction. Wheel shafts of curving wheels have axial directions that are orthogonal to the axial directions and running directions of the wheel shafts of the running wheels, respectively. When the inline skate is upright, ground surfaces of the plurality of curving turn wheels are located at a position higher than the sliding surface and on both sides of the inline skate.

An apparatus comprising a platform; a plurality of trucks coupled to the platform; and a roller assembly coupled to the platform, wherein the roller assembly is configured for an omnidirectional rotation, wherein the roller assembly is configured for an elastic biasing, wherein the roller assembly is driven by a motor.

A multidirectional wheel system, apparatus, and method to control one or more multidirectional wheels to provide multidirectional motion or movement for a movable apparatus, such as a skateboard, roller blades, a car, a motorcycle, a cleaning robot, to which the one or more multidirectional wheels are attached. The multidirectional wheel system can include a braking system to slow and/or stop the movement of the multidirectional wheel(s). At least one of the multidirectional wheels can be an omnidirectional wheel(s), with a plurality of multidirectional wheels acting thereon to control movement thereof.

An apparatus comprising a platform; a plurality of trucks coupled to the platform; and a roller assembly coupled to the platform, wherein the roller assembly is configured for an omnidirectional rotation, wherein the roller assembly is configured for an elastic biasing, wherein the roller assembly is driven by a motor.

A multidirectional wheel system, apparatus, and method to control one or more multidirectional wheels to provide multidirectional motion or movement for a movable apparatus, such as a skateboard, roller blades, a car, a motorcycle, a cleaning robot, to which the one or more multidirectional wheels are attached. The multidirectional wheel system can include a braking system to slow and/or stop the movement of the multidirectional wheel(s). At least one of the multidirectional wheels can be an omnidirectional wheel(s), with a plurality of multidirectional wheels acting thereon to control movement thereof.

A swing scooter includes a frame, a riser bar, a handlebar, a front wheel, at least two carrier rods, a flexible linking mechanism, at least two rear wheels, at least two pedals, at least two auxiliary wheels and at least two swinging modules. The auxiliary wheels are installed at the rear of the rear wheels. When the front wheel and the rear wheels touch the ground, the auxiliary wheels are situated at an appropriate height from the ground, and the swinging module is coupled between the carrier rods and the rear wheels. During use, the front and rear wheels situated at the general using status touch the ground, or the front of the scooter is tilted, such that the rear wheels and the auxiliary wheels touch the ground to add more fun to the use of the scooter.

A wheel assembly comprises a wheel, a transmission assembly mounted on the wheel, and a motor coupled to the wheel through the transmission assembly. The motor includes an axle extending in a radial direction of the wheel. The transmission assembly transmits a rotational motion of the axle to a rotational motion of the wheel.

An apparatus comprising a platform; a plurality of trucks coupled to the platform; and a roller assembly coupled to the platform, wherein the roller assembly is configured for an omnidirectional rotation, wherein the roller assembly is configured for an elastic biasing, wherein the roller assembly is driven by a motor.