The robotic device conducts an action on a curved ferromagnetic surface. The robotic device includes a chassis platform and at least one magnetic side drive module. The chassis platform rolls on the curved ferromagnetic surface and is maintained thereon by virtue of the curved ferromagnetic surface being ferromagnetic. The at least one magnetic side drive module is pivotally attached to the chassis platform and is for conducting the action on the curved ferromagnetic surface as the chassis platform rolls on the curved ferromagnetic surface.

A vehicle for variably sized transportation may include a vehicle basis and exterior elements coupled to the vehicle basis. At least some exterior elements may be collapsible or movably coupled to the vehicle basis at a first set of positions or a first set of extended or collapsed states to form a first operational configuration, or at a second set of positions or a second set of extended or collapsed states to form a second operational configuration. The first or second operational configuration may provide for a first or second shadow and a first or second passenger or cargo space for the vehicle. The first and second shadows and the first and second passenger or cargo spaces may differ in at least their longitudinal dimensions or in latitudinal dimensions. Other embodiments may also be described and claimed.

A stair assembly for a vehicle includes a frame, a first stair, a second stair, and an actuator. The frame includes a plate extending between a first side member and a second side member. The first stair is rotatably coupled to the frame and includes a first step body positioned on a first side of the plate. The second stair is rotatably coupled to the frame and includes a second step body positioned on the first side of the plate. The actuator is configured to move the first stair and the second stair between a deployed position and a storage position, and the actuator is separated from the first step body and the second step body by the plate.

A stair assembly for a vehicle includes a frame, a first stair, a second stair, and an actuator. The frame includes a plate extending between a first side member and a second side member. The first stair is rotatably coupled to the frame and includes a first step body positioned on a first side of the plate. The second stair is rotatably coupled to the frame and includes a second step body positioned on the first side of the plate. The actuator is configured to move the first stair and the second stair between a deployed position and a storage position, and the actuator is separated from the first step body and the second step body by the plate.

Drifting karts in accordance with embodiments of the invention are described that include a front wheel drive train and rear caster wheels that can be dynamically engaged to induce and control drift during a turn. One embodiment of the invention includes a chassis to which a steering column is mounted, where the steering column includes at least one front steerable wheel configured to be driven by an electric motor, a battery housing mounted to the chassis, where the battery housing contains a controller and at least one battery, wiring configured to provide power from the at least one battery to the electric motor, two caster wheels mounted to the chassis, where each caster wheel is configured to rotate around a rotational axis and swivel around a swivel axis, and a hand lever configured to dynamically engage the caster wheels to induce and control drift during a turn.

Drifting karts in accordance with embodiments of the invention are described that include a front wheel drive train and rear caster wheels that can be dynamically engaged to induce and control drift during a turn. One embodiment of the invention includes a chassis to which a steering column is mounted, where the steering column includes at least one front steerable wheel configured to be driven by an electric motor, a battery housing mounted to the chassis, where the battery housing contains a controller and at least one battery, wiring configured to provide power from the at least one battery to the electric motor, two caster wheels mounted to the chassis, where each caster wheel is configured to rotate around a rotational axis and swivel around a swivel axis, and a hand lever configured to dynamically engage the caster wheels to induce and control drift during a turn.

A moving body includes a frame, a pair of right and left first wheels, a pair of right and left second wheels, a pair of right and left first parallel links connecting the first wheels and the second wheels, a second parallel link connecting the pair of right and left first parallel links, a height changing unit connecting the second parallel link and the frame and changing a position of the frame in a height direction with respect to the second parallel link and a controller controlling the height changing unit so as to maintain a height of the frame from a road surface.

A moving body includes a frame, a pair of right and left first wheels, a pair of right and left second wheels, a pair of right and left first parallel links connecting the first wheels and the second wheels, a second parallel link connecting the pair of right and left first parallel links, a height changing unit connecting the second parallel link and the frame and changing a position of the frame in a height direction with respect to the second parallel link and a controller controlling the height changing unit so as to maintain a height of the frame from a road surface.

A chassis (200) embodiment having a geometrical structure surrounding the side and upper parts a vehicle (100), and with this geometrical structure, providing high damping effect in case of an accident, and it is characterized in comprising; a lower chassis extension (210) having front arms (211) configured at the upper part of said vehicle (100) and an upper dampener chassis (220) configured on said lower chassis extension (210).

A chassis (200) embodiment having a geometrical structure surrounding the side and upper parts a vehicle (100), and with this geometrical structure, providing high damping effect in case of an accident, and it is characterized in comprising; a lower chassis extension (210) having front arms (211) configured at the upper part of said vehicle (100) and an upper dampener chassis (220) configured on said lower chassis extension (210).