A caster brake device includes a brake gear, receiving unit, driving unit, elastic element and operating unit connected to the driving unit. The brake gear is disposed at an axle or wheel of a mobile carrier. Stop slots are disposed at the brake gear circumferentially. The receiving unit has a penetrating recess corresponding in position to the stop slots. The driving unit is disposed in the receiving unit and includes a penetrating portion corresponding in position to the penetrating recess and a stop spindle penetrating the penetrating recess and the penetrating portion. Two ends of the stop spindle correspond in position to the stop slots and thus are movably confined to the penetrating recess to enter or exit the stop slots. The elastic element has two ends abutting against the receiving unit and driving unit, respectively, to enable the stop spindle to undergo reciprocating motion within the penetrating recess.

The invention provides an operating control 28, comprising: a braking body 26 which is adjustable between a braking position, in which the braking body 26 is brought into frictional contact with a braking surface U, and a release position, in which the braking body 26 is pulled back from the braking surface U, a load input portion 22, which is set up to receive a loading force from a user, and a load trigger mechanism 42, 46 which converts a loading force acting on the load input portion 22 into an adjustment movement of the braking body 26 from the release position into the braking position.

In a heavy duty orbital caster assembly that includes a rotatable wheel unit joined to a transfer plate that pivots about a mounting post extending from a mounting plate adapted to be secured to the bottom surface of an object, the improvement comprising a pair of roller bearing assemblies that extend upwardly from the upper surface of the transfer plate adjacent to the caster wheel post as it extends through its bearing. The rollers impinge on the lower surface of the mounting plate, and serve to transfer some of the load of the supported object directly to the caster wheel, enabling the support of very heavy loads.

A wheel adapter for a cargo container includes a wheeled adapter body. A container connector on the adapter body is configured for connection to the cargo container. A container elevation bolt threadably engages the adapter body. The container elevation bolt is selectively adjustable to correspondingly adjust an elevation of the adapter body and raise the cargo container for transport.

A driven wheel assembly to provide a zero turn radius without wheel scrubbing. The assembly includes a vertical axis motor driving a vertical drive shaft to drive first and second spaced-apart wheels that are oriented horizontally or perpendicular to the vertical drive shaft for lateral motion of the vehicle. This is combined with an off-axis vertical motor and gear, which rotates or steers, the driven wheel assembly. Instead of a right angle gear drive as found in a conventional drive unit, the driven wheel assembly employs a center differential coupled to the output end of the vertical drive shaft and a hub of each of the first and second wheels and that is positioned in the space between the two wheels. The center differential drives the first and second wheels, and each of the first and second wheels can turn at a different rotational velocity or even in opposite directions.

A wheel mechanism (10) is disclosed as including an outer wheel (12), two inner wheels (36) received in the outer wheel, and two rubber dampers (24) each separating a respective outer wheel and inner wheel, the rubber dampers being deformable between a first configuration in which the entire outer periphery (37) of the inner wheel is in contact with an inner wall (29) of a recess (28) of the rubber damper and a second configuration in which a part of the outer periphery of the inner wheel is out of contact with the inner wall of the recess of the rubber damper.

A hollow caster structure includes a base, a caster body pivotally connected with the base, a first wheel unit mounted on the caster body, and a second wheel unit mounted on the caster body. Each of the first wheel unit and the second wheel unit forms a viewing space. Thus, the viewing space of each of the first wheel unit and the second wheel unit provides a visible effect. In addition, the hollow caster structure has a lighter weight by provision of the viewing space. Further, the parts of the hollow caster structure have different colors which are visible from the viewing space.

A caster includes a caster unit and at least one braking unit. The caster unit includes a receptacle, a wheel shaft disposed through the receptacle, a wheel assembly sleeved on the wheel shaft and rotatable relative to the receptacle, and a spring assembly which acts on the receptacle and the wheel shaft. The receptacle is movable relative to the wheel assembly in a vertical direction. The braking unit includes a surrounding teeth structure formed on the wheel assembly and having a hardness ranging from 65 to 75 on a Shore D scale, and a braking piece mounted on the receptacle. The braking piece includes a braking surface in form of a curve surface having a hardness ranging from 40 to 46 on the Shore D scale to be engaged with the surrounding teeth structure to retard rotation of the wheel assembly.

A subject support lift includes a mast portion, a base portion, and a lockable wheel assembly coupled to the base portion. The lockable wheel assembly includes an axle member, a lockable wheel coupled to the axle member, and a pivot member pivotally coupled to the lockable wheel and defining an axis extending in a vertical direction, where the lockable wheel is rotatable about the axis defined by the pivot member. A locking member is coupled to one of the pivot member or the lockable wheel, the locking member being repositionable between a locked position, in which the locking member engages the other of the pivot member or the lockable wheel, and an unlocked position, in which the locking member is spaced apart from the other of the pivot member or the lockable wheel.

A rough terrain cart for a wheel chair includes a frame operable to support a wheel chair and a wheel chair user. A pair of cart drive wheels are rotationally mounted to the frame. A locking mechanism is engaged with the frame. The locking mechanism is operable to secure the wheel chair to the cart. A rotational mechanism is engaged with the frame. The rotational mechanism is configured to support a pair of wheel chair drive wheels of the wheel chair and is operable to enable the wheel chair drive wheels to rotate when the wheel chair is secured to the cart by the locking mechanism. A transmission system is engaged with the frame. The transmission system is connectable to the wheel chair drive wheels. The transmission system is operable to transmit torque from the wheel chair drive wheels to the cart drive wheels.