An adjustable roller skate includes a skate device and a boot body. The boot body includes a base frame having a bottom side coupled to the skate device, an insole platform having a rear heel portion and a front toe portion frontwardly extended therefrom, and a vamp cover attached to the front toe portion of the insole platform. The insole platform is slidably coupled at the base frame to define an adjustable accommodating cavity between a rear end of the base frame and a front end of the insole platform, wherein the insole platform is frontwardly slid to extend the adjustable accommodating cavity at its maximum size and is rearwardly slid to reduce the adjustable accommodating cavity at its minimum size.

The present invention relates to motorized platforms wearable by a user, for enhancing the speed of walking while maintaining stability and reducing overall weight, due to a simplified structure and relatively modest number of components.

An electric skateboard with a hinge mechanism includes a first load plate, a second load plate, a hinge mechanism and an electric wire. A first wheel set is installed in the first load plate, and the first load plate includes a first accommodating space. A second wheel set is installed in the second load plate, and the second load plate includes a second accommodating space. A hinge mechanism includes a bridge base and two shaft sleeves pivotally connected at two sides of the bridge base. The bridge base and the two shaft sleeves together form a wiring slot. The two shaft sleeves are fixed to the first load plate and the second load plate respectively, so that the first load plate and the second load plate are foldable toward each other. The electric wire is inserted through the wiring slot.

The present steerable wheel assembly incorporates a lean-to-steer mechanism into an inner race of a roller bearing, while a wheel is mounted to an outer race of the roller bearing. A shaft extending from the mechanism is attached to a body, and the mechanism acts to steer the outer race and the wheel about a vertical steering axis when the shaft is tilted about a horizontal axis. The mechanism can be a pivot joint, providing a linear steering response, or can be a lean-to-steer mechanism that provides a non-linear response where the steering action is not proportionally responsive to tilting over the expected range of tilting.

The present steerable wheel assembly incorporates a lean-to-steer mechanism into an inner race of a roller bearing, while a wheel is mounted to an outer race of the roller bearing. A shaft extending from the mechanism is attached to a body, and the mechanism acts to steer the outer race and the wheel about a vertical steering axis when the shaft is tilted about a horizontal axis. The mechanism can be a pivot joint, providing a linear steering response, or can be a lean-to-steer mechanism that provides a non-linear response where the steering action is not proportionally responsive to tilting over the expected range of tilting.

A roller ski adapter system is disclosed. Said roller ski adapter system comprises a ski adapters, a skis, a poles and a brake lines. Said ski adapters comprises a front adapters and a rear adapters. Said poles comprises a shaft, a brake lever assembly, a first end, a second end and a grip. Said brake lever assembly comprises said brake lines, a lever and a cable guide. Said front adapters comprises a squeeze plate assembly, a trucks and a wheels. Said rear adapters comprises a braking system, a rear wheel assembly, a squeeze plate assembly, a trucks and a wheels. Said braking system comprises a braking bar, a brake line, a one or more spring assemblies, a splitter and a brake lines. Said one or more spring assemblies comprises a first end, a second end, a first bracket, a second bracket and a one or more braking bar fasteners.

The present disclosure includes a transportation apparatus. The apparatus comprises: a surface to receive a plurality of forces at a plurality of locations thereon; a plurality of force sensors, attached to the surface, to provide information related to the plurality of forces; a plurality of wheels beneath the surface, each of the plurality of wheels being coupled with a motor; and a controller to: determine, based on the provided information, a first plurality of forces at the plurality of locations; determine, based on the first plurality of forces, a reference distribution associated with the plurality of locations; determine, based on the provided information, a second plurality of forces; determine a target speed and a target direction of the apparatus based on the reference distribution and the second plurality of forces; and provide one or more signals to the motors based on the target speed and the target direction.

The present disclosure includes a transportation apparatus. The apparatus comprises: a surface to receive a plurality of forces at a plurality of locations thereon; a plurality of force sensors, attached to the surface, to provide information related to the plurality of forces; a plurality of wheels beneath the surface, each of the plurality of wheels being coupled with a motor; and a controller to: determine, based on the provided information, a first plurality of forces at the plurality of locations; determine, based on the first plurality of forces, a reference distribution associated with the plurality of locations; determine, based on the provided information, a second plurality of forces; determine a target speed and a target direction of the apparatus based on the reference distribution and the second plurality of forces; and provide one or more signals to the motors based on the target speed and the target direction.

The present steerable wheel assembly incorporates a lean-to-steer mechanism into an inner race of a roller bearing, while a wheel is mounted to an outer race of the roller bearing. A shaft extending from the mechanism is attached to a body, and the mechanism acts to steer the outer race and the wheel about a vertical steering axis when the shaft is tilted about a horizontal axis. The mechanism can be a pivot joint, providing a linear steering response, or can be a lean-to-steer mechanism that provides a non-linear response where the steering action is not consistently responsive to tilting over the expected range of tilting. The present non-linear lean-to-steer mechanisms can also be incorporated into alternative lean-to-steer devices, and alternative mechanisms can employ tracking structures to coordinate tilting motion of a first moving element with steering motion of a second moving element to provide a non-linear lean-to-steer response.

A ground-engaging devices that is capable of sustained rolling, stable braking, secure standing, and walking. In one preferred embodiment, the invention relates to a wheeled footwear device. In another preferred embodiment, the invention relates to a wheeled footwear platform. In yet another preferred embodiment, the invention relates to a wheeled artificial foot.