A mobile X-ray imaging apparatus has an angle sensor and a movement calculation circuit that controls the driving of drive wheels based on the turning angle of auxiliary wheels relative to a straight moving direction of the base unit when a fine movement switch instructs movement of the base unit in the fine movement mode. The turning angle of auxiliary wheels is detected by a turning angle sensor and the rotation of the pair of drive wheels is controlled by the movement calculation circuit as the auxiliary wheels turns to the straight moving direction.

The hoverboard buddy system utilizes a number of components that can be attached together with a hoverboard in a number of different configurations in order to expand the riding options of the user. In one embodiment, components include: a hoverboard, a saddle possibly with additional wheels and a stability bar, a plurality of straight handles, a plurality of curved handles, a plurality of accessory wheels, a split seat that independently actuates either foot pedal on a hoverboard, a fixed bench seat, pusher extension, and other components.

An electrically driven moving vehicle includes a main body on which an article to be transported is loaded, and a handle provided on one side of the main body. A pair of force sensor units are provided in the handle. A force applied by a user is sensed by the pair of force sensor units to control the operation of electric motors. The user can operate the electrically driven moving vehicle while holding a position convenient for the user rather than a specific position of the handle. In addition, the user can conveniently operate the electrically driven moving vehicle with only one hand, without using both hands.

A folding cart for disc golf has frame elements allowing the cart to be folded with the elements in close, parallel planes, for storage or transport. In various models, the folding cart has a bag carrier implemented especially for a disc bag, the bag carrier foldable into a parallel plane, a seat also foldable into a parallel plane, a hand-operated brake, and an electric motor drive for driving one of the wheels of the cart.

The disclosure provides a vehicle drive system that includes a drive pedestal, a drive motor mounting plate connected to the drive pedestal, an electric drive motor assembly having an output shaft and being connected to the drive motor mounting plate, at least two bearings connected to the drive pedestal, an axle shaft rotatably connected to the at least two bearings, a drive wheel connected to the axle shaft, a chain drive assembly, and a controller that provides control signals to the electric drive motor assembly and is connected to the drive pedestal. The electric drive motor assembly also includes a first gear speed reduction, while the chain drive assembly includes a second gear speed reduction.

In the specification and drawings an accessory cart is described and shown with a base, a housing element that is connected to the base and extends upward from the base, and a platform, which is connected to the housing element with the height of the platform being automatically adjustable.

A power drive unit attachable to a wheelbarrow to apply rotational force to the wheelbarrow wheel, the drive unit comprising a drive motor to power a drive wheel, with the drive wheel extending outward from the drive unit frame to be contactable with a wheelbarrow wheel, and a battery receiver to the drive motor for receiving one or more batteries, to include the type of batteries used in cordless tools.

A drive wheel in which the rotational axial center of a wheel along the vertical direction intersecting the axial center of the axle is arranged shifted in the horizontal direction orthogonal to the axial center of the axle with respect to the axial center of the pivot shaft. When a radius R1 of the wheel, center distance R2 between the rotational axial center and the axial center of the pivot shaft, rotational frequency n1 of the wheel, rotational frequency n2 of the pivot shaft, rotational speed V1 of the wheel, and steering rotational speed V2 of the wheel rolling on a floor surface while turning the pivot shaft satisfy V1=V2, relations of V1=2R1n1, V2=2R2n2, and n1=n2 (R2/R1) are satisfied.

A motorized attachment to a utility wagon is provided. In one aspect, the attachment may include at least an adjustable frame for attaching to the wagon. In another aspect, the frame supports a power source, which may be disposed below the frame or above the frame. The frame, in a further embodiment, may further attach to a motor coupled or encased in a driving wheel. In one embodiment, the driving wheel may be disposed or positioned between the two existing front wheels of the wagon. In a further example, the driving wheel may include a tire with about 4 to 6 (in width) deep treated tire. The attachment may further include a control or a trigger to energize the motor and the driving wheel so that it provides the needed motion to assist the wagon.

A pushcart includes a left wheel, a right wheel, a left wheel driver, a right wheel driver, a control unit, a left wheel rotary encoder, and a right wheel rotary encoder. The left wheel driver rotates the left wheel. The right wheel driver rotates the right wheel. The left wheel rotary encoder detects a rotational angle of the left wheel. The right wheel rotary encoder detects a rotational angle of the right wheel. The pushcart performs feedback control on angular velocities of the left wheel and the right wheel at least using an integral operation. The control unit calculates a weighted average of an integral element with respect to the angular velocity of the left wheel and an integral element with respect to the angular velocity of the right wheel, and then separately controls the left wheel driver and the right wheel driver based on the weighted average.