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.

The present invention discloses a flat ground cross-country type roller skate comprising a skate body (1), wherein a wheel assembly at a lower part of the skate body, wherein the wheel assembly comprises a mounting seat (6) used to mount the skate body (1) and a hoisting mechanism disposed on the mounting seat (6). There are at least three wheel assemblies disposed on the hoisting mechanism, and each wheel assembly can hoist independently under the action of the hoisting mechanism. Thus, the wheel assemblies of the roller skate can be hoisted independently so as to adapt to various roads with uneven surface.

A pipe transporter traction wheel suitable for mounting on a pipe transporter travelable along an interior surface of a pipe may include a tractor portion configured to be attached to a pipe transporter, the tractor portion having a tractor surface configured to contact an interior surface of a pipe when the pipe transporter is driven in the pipe. The tractor portion may include a harder granular material and a softer matrix material embedding the granular material. The wheel may include a hub and/or a mounting interface. A kit may be provided including one or two adapters and a wheel.

A self-propelled skateboard with at least one front wheel, a rear wheel, and a board, that is propelled without the rider's foot touching the ground. A driving force is generated the rider's weight is continuously shifted up and down in synchrony with the rocking motion of the eccentrically mounted rear wheel, which causes the board to be repeatedly pushed down and bounced back. Mounting multiple axles and one-way sprag clutch bearings on the rear wheel allows the rider to propel the board up inclined surfaces and to stop his/her motion and rest on the board, yet keep the skateboard continuously running.

The present invention refers to a roller skate with a single wheel comprising a wheel (2110, 2120); a connection means (230) configured so as to allow the connection of a shoe (S); characterized in that the wheel is made up of a first circular element (2110) and a second circular element (2120), inside the first circular element, between which a rolling element (2130) is arranged, configured so as to facilitate the relative movement of the first circular element (2110) with respect to the second circular element (2120); and in that the connection means (230) is connected to the second circular element (2120) and is configured so as to position the shoe (S) at least partially inside the first circular element, preferably in an orientable manner according to any direction with respect to the second circular element (2120).

In one embodiment, a skateboard includes a pair of trucks mounted to the underside of a skateboard deck. Each truck includes a base plate, a hanger, axles and a kingpin. The base plate is secured to the underside of the deck. The base plate has a pivot recess that mates with the pivot on the hanger. The hanger includes a hanger pivot and the bushing seats. The pivot recess houses a pivot tube supporting the hanger pivot. The hanger pivot, pivot tube and the pivot recess are all in-line. In contrast, the hanger pivot axis is negatively offset relative to the pivot-to-axle axis.

A self-balancing electric vehicle may include a platform having first and second foot placement sections rigidly coupled to each other, and a pair of coaxial, motorized wheels independently mounted between the first and second foot placement sections. The first and second wheels may be coupled to the platform via spring suspensions. Rider presence and turning intentions may be determined based on strain induced in the platform by the rider. The strain may be detected by one or more strain gauge systems. One of the strain gauge systems may be configured for use in a steering control circuit, and may include a strain gauge sensor mounted diagonally with respect to a long axis of the platform, such that the strain gauge detects only twist-induced strain.

The present invention is a personal mobility device having multiple modes of operation, including a deck, and a first and second wheel assembly, and at least one battery powered electric motor, and actuation means. The deck includes an elongate substantially flat body, and each wheel assembly is attached to the deck in the vicinity of a respective end of the elongate body. The respective axle of each wheel assembly is located upon the plane of the deck. The at least one battery powered electric motor is adapted to be actuated via the actuation means when a user steps onto the deck, and adapted to drive the first and second wheel assemblies, and wherein in the first mode of operation, both the first and second wheel assemblies are adapted to roll in a circumferential direction, predominately under the influence of the at least one electric motor, so that the device moves in an orthogonal direction to the longitudinal axis of the deck, and wherein in a second mode of operation, both the first and second wheel assemblies are also adapted to optionally free-roll in an orthogonal direction to the plane of the wheel assembly, thereby allowing the device to move substantially in the direction of the longitudinal axis of the deck. There is a transitional mode of operation, where the device is capable of continuously and smoothly transitioning between the first and second mode of operation, while the device is being ridden.

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 self-balancing electric vehicle may include a platform having first and second foot placement sections rigidly coupled to each other, and a pair of coaxial, motorized wheels independently mounted between the first and second foot placement sections. The first and second wheels may be coupled to the platform via spring suspensions. Rider presence and turning intentions may be determined based on strain induced in the platform by the rider. The strain may be detected by one or more strain gauge systems. One of the strain gauge systems may be configured for use in a steering control circuit, and may include a strain gauge sensor mounted diagonally with respect to a long axis of the platform, such that the strain gauge detects only twist-induced strain.