A dual-stage caster is disclosed. The caster includes a horn assembly and an arm assembly pivotally coupled to the horn assembly. The caster further includes a wheel rotatably mounted to the arm assembly and a mounting plate mounted to the horn assembly and configured be mounted to a transport vehicle. When the wheel is moved along a support surface, the arm assembly is in a neutral position and the wheel is in the up position. When the wheel moves into a depression in the support surface, the wheel stage spring moves the wheel from the up position to the down position and the arm assembly remains in the neutral position. When the wheel moves over a raised portion in the support surface, the arm assembly pivots relative to the horn assembly so as to compress the main stage spring. The caster may be a swivel caster or a rigid caster.

A support assembly includes a body and a bearing assembly. The body defines a first opening. The bearing assembly is selectively repositionable within the first opening. The bearing assembly includes a housing, a socket, and a ball. The housing defines a second opening. The socket is positioned at least partly within the second opening and coupled to the housing. The ball bearing is positioned within the socket. The ball bearing is configured to rotate with respect to the housing. The bearing assembly is selectively repositionable between a first position, where the ball bearing extends from the body, and a second position, where the ball bearing does not extend from the body.

An EZ SPEEDY AXLE KIT for increasing the mobility of foldable sawhorse stands while allowing the tires used to be customizable. The invention consists of an axle that connects all of the pieces together. It is mounted with two fasteners that pass through the axle. Two spindles thread into the axle to allow them to be removable. Two objects with threaded apertures lock the spindles in place as well as provide the necessary preload to the bearing races of any tire used. The invention allows for any size spindle and tires to be used as long as the spindle can thread into the axle.

A transport vehicle includes: a vehicle body (31) and a first traveling mechanism (32) mounted on the vehicle body (31). The first traveling mechanism (32) includes a plurality of crawling assemblies (320) respectively provided on two opposite sides of the vehicle body (31). Each crawling assembly (320) includes: a wheel carrier (321) extending outwardly from a lateral side of the vehicle body (31); and a driving wheel (322) mounted on the wheel carrier (321), the driving wheel has an axis perpendicular to an extending direction of the wheel carrier (321). The wheel carrier (321) is rotatable about the central axis of the wheel carrier (321) in the extension direction.

An object to provide a brake device for a caster that has a simple structure, provides reliable braking, has no risk of damaging the circumferential surface of a roller, and has high durability. The brake device for a caster includes: a plurality of projecting parts formed concentrically at regular intervals on opposite side-surfaces of a roller in a direction in parallel with the axis, and levers set across the roller at both side-panels of a fork so as to be opposed to the projecting parts, and a claw formed at a tip of each of the levers so as to be opposed to the projecting parts, wherein the levers are operated so that the claw is engaged with a concave part formed between the projecting parts, thereby locking rotation of the roller.

A three-wheeled all-terrain vehicle or push chair utilizes an innovative front wheel mount, employing a side-mounted caster mechanism, for improving its pushability and steerability. Because of this approach, lifting is not required to steer the chair, and any size or type and width of wheel can be used. As a result, the invention provides a new class of all-terrain product for the disabled adult market and a rugged, truly off-road runner/jogger/hiker stroller for the young child market.

A wheel for a cart comprises a hollow cylindrical body. The hollow cylindrical body is formed of a stiff material and has a corrugated outer surface and a corrugated inner surface.

A steerable omni-directional cart is disclosed. The cart includes either a driven wheel or a sphere disposed on a lower surface of the cart platform to provide powered motion to the cart. A mechanical element is provided to allow the direction of the powered motion to be changed by the user to thereby allow the cart to be steered. The power may be provided by a removable and rechargeable battery pack. The battery pack may drive a motor which includes a driven output element in contact with the sphere to provide powered motion. Alternatively, the driven wheel may be a hub driven wheel which is powered by the battery pack.

A support assembly includes a body and a bearing assembly. The body defines a first opening. The bearing assembly is selectively repositionable within the first opening. The bearing assembly includes a housing, a socket, and a ball. The housing defines a second opening. The socket is positioned at least partly within the second opening and coupled to the housing. The ball bearing is positioned within the socket. The ball bearing is configured to rotate with respect to the housing. The bearing assembly is selectively repositionable between a first position, where the ball bearing extends from the body, and a second position, where the ball bearing does not extend from the body.

The invention concerns a rolling device for a device to enable moving the device along a surface. The rolling device comprises a housing arranged for attachment to the device and a wheel support assembly arranged in the housing for carrying a wheel. The wheel support assembly comprises a wheel carrying member arranged for connection with the wheel, and a retainer element arranged for connection with the housing. The wheel carrying member comprises a deflective rib with an protrusion for releasable engagement with a groove of the retainer element to select the release or attachment between the wheel carrying member and the retainer element.