A bottom structure of a roller skate includes a sole; a frame secured to the sole and including front and rear supports and two hubs disposed on the front and rear supports respectively; a pivotal member disposed in the hub; two spaced sleeves disposed in the hub wherein the sleeves are further partially disposed in the pivotal member and secured to the pivotal member; a shaft passing through the hub, the pivotal member, and a gap between the sleeves, and rigidly secured to the pivotal member; and two enlargements disposed at two ends of the shaft respectively.

A self-balancing board is provided, comprising a primary wheel assembly, a platform, at least one sensor, a controller, a first auxiliary wheel assembly, and a first brake element. The primary wheel assembly comprises a primary wheel and a motor driving the primary wheel. The platform is secured to the primary wheel assembly and has a foot deck. The at least one sensor senses the orientation of the platform. The controller receives data from the at least one sensor and controls the motor in response to the received data. The first auxiliary wheel assembly is secured to the platform distal the primary wheel assembly, and is elevated from contacting a flat surface upon which the primary wheel rests when the foot deck is parallel to the flat surface. The first brake element is manually movable relative to the first auxiliary wheel assembly to engage the first auxiliary wheel assembly to provide resistance to rotation of the first auxiliary wheel assembly.

An inline skate includes a front wheel mount secured to a bottom of a skate boot; a front wheel rotatably secured to the front wheel mount; a rear wheel mount secured to the bottom of the skate boot; a rear wheel rotatably secured to the rear wheel mount; and a shock absorber disposed between the front wheel mount and the rear wheel mount and including two sets of a positioning member secured to the skate boot; a threaded adjustment member disposed through either the rear or front wheel mount; a first bifurcation element through a biasing member and having one end secured to the adjustment member and the other two ends secured to the biasing member; and a second bifurcation element through the biasing member and having one end secured to the positioning member and the other two ends secured to the biasing member.

Skating device (1) provided with a plurality of wheels (2a, 2b, 2c, 2d), comprising: an electric motor (3) operatively coupled with at least one wheel (2a) of said plurality of wheels; at least one acceleration sensor (4) operatively coupled with at least one wheel (2a) of said plurality of wheels (2a, 2b, 2c, 2d); at least one speed sensor operatively coupled with at least one wheel (2a) of said plurality of wheels (2a, 2b, 2c, 2d); and at least one control unity adapted to actuate the operations of said electric motor (3) at least when said acceleration sensor (4) detects positive acceleration of said at least one wheel (2a), wherein the amount of electric power supplied by said electric motor to said at least one wheel (2a) is calculated according to the speed measured by said at least one speed sensor (5), at least when said acceleration sensor (4) detects said positive acceleration.

This locomotion device includes a mechanism suitable for converting the pivoting of a roller into a movement of a pad to an advanced position in which it brakes this roller, this mechanism includes a planetary gear set having: a planetary wheel attached to a sole and the axis of revolution of which coincides with a pivoting axis of the roller and a satellite gear rotated by the planetary wheel about an axis of revolution attached without any degree of freedom to the roller and a pin movable by the satellite gear between: a near position in which it pushes and maintains the pad in an advanced position and a distant position in which it allows the movement of the pad from its advanced position to a retracted position.

An electric vehicle may comprise a board including deck portions each configured to receive a foot of a rider, and a wheel assembly disposed between the deck portions. A motor assembly may be mounted to the board and configured to propel the electric vehicle using the wheel assembly. At least one orientation sensor may be configured to measure orientation information of the board, and at least one pressure-sensing transducer may be configured to determine rider presence information. A motor controller may be configured to receive the orientation information and the rider presence information, and to cause the motor assembly to propel the electric vehicle based on the orientation and presence information.

A skateboard with hand brake comprises a skateboard, a handle and a hand brake. A skateboard can be an ordinary skateboard or an electric motor skateboard. The handlebar has an L shape. The end of the lower part of the handle is fitted to the hanger of the front truck of the skateboard. A hand brake comprises a brake lever, a brake cable and a brake module. A brake lever is fitted to the upper part of the handle and a brake cable connects the brake lever to the brake module that is fitted underneath the deck.

Provided is a ball skate sole structure which can be customized for each individual or each sport. This ball skate sole structure includes: a base plate having a plurality of first holes and a plurality of second holes; at least one ball roller member, the at least one ball roller member being disposed in the first hole selected from among the plurality of first holes; and at least one brake member, the at least one brake member being disposed in the second hole selected from among the plurality of second holes.

Provided is a ball skate sole structure which can be customized for each individual or each sport. This ball skate sole structure includes: a base plate having a plurality of first holes and a plurality of second holes; at least one ball roller member, the at least one ball roller member being disposed in the first hole selected from among the plurality of first holes; and at least one brake member, the at least one brake member being disposed in the second hole selected from among the plurality of second holes.

A controller for an electric skateboard is provided. The controller includes a pistol-grip housing configured to fit in a palm of a hand of a user of the electric skateboard; an accelerator trigger positioned on an upper front portion of the pistol-grip housing, and configured to be actuated by a first finger of the hand when the pistol-grip housing is gripped; a brake trigger positioned on an upper rear portion of the pistol-grip housing, and configured to be actuated by a thumb of the hand when the pistol-grip housing is gripped; and a display screen positioned on a front upper portion of the pistol-grip housing above the accelerator trigger and forwardly of the brake trigger, and configured to be viewed by the user when the pistol-grip housing is gripped.