A drive assembly for a walk-behind, powered device operably couples an engine of the powered device to a mobility assembly to provide mobility of the powered device responsive at least in part to operation of the engine. The drive assembly includes a transmission shaft and a short turning assembly. The transmission shaft selectively receives drive power operably coupled from the engine to drive a first drivable component and a second drivable component of the mobility assembly. The first and second drivable components are disposed substantially at opposite sides of the powered device. The short turning assembly is configured to cause both disengagement of drive power and activation of braking to the first drivable component while drive power is provided to the second drivable component.

A self-leveling single axle dump truck is provided, the truck comprising a frame, a dump body pivotably mounted on the frame, and a propulsion and self-leveling system comprising a single axle supporting the frame at least during motion of the self-leveling single axle dump truck, the single axle comprising at least a first and a second wheel and at least a first electric traction motor for driving the first wheel and a second electric traction motor for driving the second wheel.

A control system detects a loaded state for a lifting device. The control system receives a current load value from a load sensor corresponding to a load on the lifting device and compares the current load value from a previously received load value to determine a change in load. The control system receives a current displacement value from a displacement sensor corresponding to a displacement of the lifting device and compares the current displacement value with a previously received displacement value to determine a change in displacement. The control system compares the change in load with the change in displacement to determine a current load slope. The lifting device in identified in a loaded state based on a comparison of the current load slope with a load slope threshold. The control system may stop extending the lifting device after reaching the loaded state and start extending all of the lifting devices in unison to lift the load off of a base surface after all of the lifting devices reach the loaded state.

A hand-propelled, self-driving, traveling machine that includes a clutch which enables transmission between a wheel and a transmission shaft. The clutch provides a drive state in which the transmission shaft drives the wheel to rotate and an unlocked state in which the wheel is rotatable relative to the transmission shaft. The clutch includes a driving member, combined with the transmission shaft, a movable pin, movable between a locked position in which the clutch is in the drive state and an unlocked position in which the clutch is in the unlocked state, a transmission member connected to the wheel, a movable friction member provided with a limiting slot, where the movable pin is partially disposed in the limiting slot, and a fixed friction member that is fixed to the chassis and that is in a frictional contact with the movable friction member.

A wheel assembly is for a unitractor. The wheel assembly has a wheel, a static hub and an internal electrical motor. The wheel has a rim, a traction member arranged to the periphery of the rim and a plurality of magnets arranged to the inside of the rim. The hub has a stator having spherical windings. The wheel is rotatably connected to the hub via at least one bearing. At least one side panel extends from the rim and to the at least one bearing. At least one of an energy source and a controller for controlling the energy source is positioned in the hub. The hub is provided with a coupling member for an implement frame. A unitractor having the wheel assembly is also described.

A drill rig with a steering system may include a substructure having a wheelhouse, a drill floor arranged atop the substructure, a mast extending upwardly and above the drill floor, and a steering system arranged within the wheelhouse. The steering system may include a wheel assembly comprising an electric motor configured for driving rotational motion of a wheel, a deployment device configuring for deploying the wheel assembly to carry the drill rig, and a steering mechanism configured for selective engagement with the wheel assembly and rotating the wheel assembly.

Walk-behind power equipment includes: a main body provided with at least one front wheel and left and right rear wheels and a work unit; travel motors provided for the respective rear wheels; a handle extending from the main body rearward and upward; at least one of a tilt angle detector that detects a tilt angle of the main body and a load detector that detects a downward load applied to the handle; a yaw rate detector that detects a yaw rate; and a control unit that drive-controls the travel motors. The control unit determines whether the main body is in a rearward tilted state based on the tilt angle or the downward load, and if it is determined that the main body is not in the rearward tilted state, performs straight-line travel control to set a rotational speed difference between the travel motors to reduce the yaw rate.

A mobile trailer-cleaning system is a system that facilitates the cleaning of the exterior surfaces of a trailer. The system may include at least one brush assembly, a roof carriage, an agitation mechanism, and a steering assembly. The at least one brush assembly enables the cleaning of all the trailer's exterior surfaces including the rear of the trailer and any non-flat surfaces. The roof carriage serves as a guide to maintain the at least one brush assembly adjacent to the trailer's walls as the at least one brush assembly moves along the trailer. The roof carriage also prevents the at least one brush assembly from tipping over. The agitation mechanism eases the cleaning of the trailer's exterior surfaces by agitating the at least one brush assembly in predetermined modes of operation. The steering assembly enables the user to manually operate the at least one brush assembly during the cleaning process.

A tractor has a base for supporting a motive power source, left and right driven wheels, and left and right transmissions for the respective left and right wheels; a handle structure coupled to the base for grasping by an operator from behind the tractor; a drive system for driving each of the left and right transmissions with motive power from the motive power source; wherein the left and right transmissions are hydrostatic transmissions, further having a speed regulator control lever on each transmission that allows seamless control of the transmission from reverse speed through neutral into forward speed; and a transmission control coupled to each speed regulator control lever; further wherein there is a longitudinally disposed space between the left and right transmissions, and a power take off shaft is disposed in the space extending anteriorly and driven by the motive power source for powering a powered attachment arranged to be attached at the anterior of the tractor, further including a shaft extension of said power take off shaft extending posteriorly for driving a rear power take off for powering a rear mounted powered attachment.

A tractor has a base for supporting a motive power source, left and right driven wheels, and left and right transmissions for the respective left and right wheels; a handle structure coupled to the base for grasping by an operator from behind the tractor; a drive system for driving each of the left and right transmissions with motive power from the motive power source; wherein the left and right transmissions are hydrostatic transmissions, further having a speed regulator control lever on each transmission that allows seamless control of the transmission from reverse speed through neutral into forward speed; and a transmission control coupled to each speed regulator control lever; further wherein there is a longitudinally disposed space between the left and right transmissions, and a power take off shaft is disposed in the space extending anteriorly and driven by the motive power source for powering a powered attachment arranged to be attached at the anterior of the tractor, further including a shaft extension of said power take off shaft extending posteriorly for driving a rear power take off for powering a rear mounted powered attachment.