A roller board has axles provided with castors and secured at the front and rear ends of a board deck such that a steering movement is transferrable to the axles by a person on the board deck by lateral shifting of weight. Steerability and problem-free operation are improved. Substantially rigid booms, one directed to the front and one directed to the rear, are provided at the front and rear ends of the board deck, respectively. A support arm pointing in the direction of the central axis of the board deck is rigidly fastened to each boom. The support arms are pivotable on the two sides about a pivot axis inclined in the direction of travel by 40° to 50° relative to the plane of the board deck. The axle of a single castor is mounted rotatably in or on each hub, with the pivot joint inside the castor.

A portable energy-saving and environment-friendly electric vehicle is light in weight, small in volume, convenient in electricity charging, and disassemble to be collected into a backpack for portability. The backpack is further furnished with a crank-handle generator to fulfill manpower electricity generation and working out simultaneously. This energy-saving and environment-friendly electric vehicle is mainly consisted of two adjustable skateboards and a support rod for adjusting speed and connecting a battery set. The battery set can be conveniently replaced roadside or domestically. In a situation of power out, manpower can be used to charge the battery set. Thus, the situation of power out to shut down the electric vehicle can be met. In addition, the battery set associated with the generator is reliable for charging mobile phones and computers.

One or more sets of dual brake pads and related assemblies are disposed over and upon one or more wheels of an inline skate. One or more center assemblies are above each brake enabled wheel and center over each wheel. A brake assembly may be secured to a skate boot or to the frame of an inline skate. A brake assembly may attach to a hand control braking system enabling foot free braking. A brake assembly may be attached to one or more center wheels of an inline skate so as to not impede skating maneuvers.

A portable energy-saving and environment-friendly electric vehicle is light in weight, small in volume, convenient in electricity charging, and can be disassembled for portability in a backpack. The backpack is further furnished with a crank-handle generator to enable manpower electricity generation and working out simultaneously. This energy-saving and environment-friendly electric vehicle is mainly comprised of two adjustable skateboards and a support rod for adjusting speed and connecting a battery set. The battery set can be conveniently replaced roadside or at other locations. In a situation of power loss, manpower can be used to charge the battery set. Thus, the situation of power loss fully disabling the electric vehicle can be met. In addition, the battery set associated with the generator is reliable for charging mobile phones and computers.

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 subject of the invention is an in-line skate braking system designed to brake in-line skate wheels. This is achieved by an electric motor controlling the action of the brake segment on in-line skate wheels.

A roller board has axles provided with castors and secured at the front and rear ends of a board deck such that a steering movement is transferrable to the axles by a person on the board deck by lateral shifting of weight. Steerability and problem-free operation are improved. Substantially rigid booms, one directed to the front and one directed to the rear, are provided at the front and rear ends of the board deck, respectively. A support arm pointing in the direction of the central axis of the board deck is rigidly fastened to each boom. The support arms are pivotable on the two sides about a pivot axis inclined in the direction of travel by 40° to 50° relative to the plane of the board deck. The axle of a single castor is mounted rotatably in or on each hub, with the pivot joint inside the castor.

A removable skateboard brake apparatus for easily adding and removing brakes to a skateboard includes a clip base having a base underside and a base top side. A clip top has a top underside and a top top side. The top underside is pivotably coupled to the base top side. A spring is coupled to the clip base and the clip top to bias the clip top towards the clip base. The clip base and the clip top are attached to a deck of a skateboard. A brake housing has a housing top side coupled to the base underside, a housing bottom side, a housing inner side, a housing outer side, and a pair of housing lateral sides. A brake pad is coupled to the brake housing. The brake pad is coupled to the housing bottom side to contact a wheel perimeter of a wheel of the skateboard.

A board apparatus that a user can ride and use to traverse inclines is disclosed. The board apparatus comprises an elongated board with a pivot wheel protruding through the board. A user of the board apparatus can stand on the board with feet in front and behind the pivot wheel, balancing a substantial portion of their weight on the pivot wheel. By adjusting their weight on the pivot wheel, the user is able to control the board's direction of travel. The board apparatus may further comprise a brake apparatus integrated to the pivot wheel that allows the user to maintain control over their speed as the board apparatus gains momentum going down an incline. The board apparatus may further comprise low friction elements at their front and/or rear ends to assist in maintaining momentum if the front or rear end comes into contact with the ground or an obstacle.

A method, system, apparatus, and/or device for propelling a non-motorized vehicle forward. The method, system, apparatus, and/or device may include a frame, a first wheel, a second wheel, a motor, a controller, and a bracket. The frame may attach to the first wheel, the second wheel, and the motor. The first wheel may attach to a first side of the frame and rotate about an axis. The second wheel may attach to a second side of the frame and rotate about the axis. The motor may connect to the first wheel, where the motor is configured to rotate the first wheel to propel the apparatus forward. The controller may control a speed at which the motor rotates the first wheel. The bracket may attach to a front of the first frame and connect to a non-motorized vehicle.