An auxiliary drive device for a wheelchair has at least one electrically driven drive wheel and a coupling mechanism for coupling the auxiliary drive device to the wheelchair. The electrically driven drive wheel is supported at a steering shaft and freely pivotable with respect to the auxiliary drive device. The steering shaft is arranged such that, when the auxiliary drive device is coupled at a wheelchair ready to be operated, a castor is provided for the electrically driven drive wheel.

An apparatus comprising a platform; a plurality of trucks coupled to the platform; and a roller assembly coupled to the platform, wherein the roller assembly is configured for an omnidirectional rotation, wherein the roller assembly is configured for an elastic biasing, wherein the roller assembly is driven by a motor.

An apparatus comprising a platform; a plurality of trucks coupled to the platform; and a roller assembly coupled to the platform, wherein the roller assembly is configured for an omnidirectional rotation, wherein the roller assembly is configured for an elastic biasing, wherein the roller assembly is driven by a motor.

A hydraulic system for controlling a pair of steerable caster wheels includes a left steering command valve, a right steering command valve, and a rear steering control valve. A supply pressure fluid circuit interconnects a pressure source and the rear steering control valve. A command valve supply fluid circuit interconnects the rear steering control valve with both the right steering command valve and the left steering command valve. A left side steering fluid circuit interconnects a left side actuator and the left steering command valve. A right side steering fluid circuit interconnects a right side actuator and the right steering command valve. A fluidic tie rod fluid circuit interconnects both the left side actuator and the right side actuator with the rear steering control valve. A tank return fluid circuit interconnects the rear steering control valve, the left and right steering command valves, and a tank.

A hydraulic system for controlling a pair of steerable caster wheels includes a left steering command valve, a right steering command valve, and a rear steering control valve. A supply pressure fluid circuit interconnects a pressure source and the rear steering control valve. A command valve supply fluid circuit interconnects the rear steering control valve with both the right steering command valve and the left steering command valve. A left side steering fluid circuit interconnects a left side actuator and the left steering command valve. A right side steering fluid circuit interconnects a right side actuator and the right steering command valve. A fluidic tie rod fluid circuit interconnects both the left side actuator and the right side actuator with the rear steering control valve. A tank return fluid circuit interconnects the rear steering control valve, the left and right steering command valves, and a tank.

An electric powered personal mobility vehicle that includes at least one front wheel and an electric motor that provides rotational force to a wheel of the vehicle. The electric motor is supported by the vehicle and is powered by a rechargeable battery that is also supported by the vehicle. The vehicle can also include swivel caster wheels each configured to rotate about a wheel axis.

Disclosed herein is a wheel shield apparatus that includes a pair of elongated parallel tube members in perpendicular engagement with a pair of short parallel tube members, at least one removable side of the wheel shield apparatus is operable to be temporarily opened or removed such that the wheel shield apparatus may be placed around a wheel of a neurosurgical microscope or some other type of heavy wheeled machinery and the removable side may be placed in a closed position such that the wheel shield surrounds the wheel. Each of the pair of elongated parallel tube members and/or each of the pair of short parallel tube members comprises a cavity configured to receive a ballast material to provide sufficient weight to ensure that the wheel shield apparatus contacts the floor such that cables along the floor are pushed out of the way by the wheel shield apparatus and prevented from being run over while the machinery is being transported.

Disclosed herein is a wheel shield apparatus that includes a pair of elongated parallel tube members in perpendicular engagement with a pair of short parallel tube members, at least one removable side of the wheel shield apparatus is operable to be temporarily opened or removed such that the wheel shield apparatus may be placed around a wheel of a neurosurgical microscope or some other type of heavy wheeled machinery and the removable side may be placed in a closed position such that the wheel shield surrounds the wheel. Each of the pair of elongated parallel tube members and/or each of the pair of short parallel tube members comprises a cavity configured to receive a ballast material to provide sufficient weight to ensure that the wheel shield apparatus contacts the floor such that cables along the floor are pushed out of the way by the wheel shield apparatus and prevented from being run over while the machinery is being transported.

A spinner wheel assembly for a luggage case is provided. The wheel assembly may include a housing, a support strut rotatably coupled to the housing about a spinner axis, and a plurality of wheels each rotatably coupled to the support strut about a wheel axis. Each wheel may rotate in a plane positioned at an angle to at least one other wheel. Each wheel may be coupled to the support strut in a spaced relationship thereto.

A patient transport apparatus comprises a support structure and at least one caster assembly coupled to the structure to facilitate movement of the structure along a floor. Each caster assembly comprises a wheel, an actuator moveable between three actuator positions, a steer lock assembly moveable by the actuator between a steer and non-steer locked state, and a brake assembly movable by the actuator between a braked and unbraked state. The brake assembly includes a plunger, a retainer coupled to the plunger, a brake pad for sliding movement along the retainer, and a brake biasing element disposed between the plunger and the brake pad to urge the brake pad away from the plunger such that movement of the actuator to place the brake assembly in the braked state simultaneously brings the brake pad into engagement with the wheel and slides the brake pad along the retainer to compress the biasing element.