An aerial work platform having an electric rotary actuator for electrically rotating the aerial work platform. The aerial work platform includes a housing support to which an electric motor is mounted, the electric motor having output shaft that meshes with a compound planetary gearset disposed within a main gear housing. The planetary gearset is used to actuate a rotary shaft to which is attached a rotary bracket that supports an aerial work platform. An electric brake is disposed adjacent one of the rotary shaft or the motor output shaft to prevent rotation of a shaft when the motor is not energized or when loss of power occurs. The electric rotary actuator can be energized to rotate the aerial work platform in a lateral plane.

A rib for an elevating platform, the rib designed and configured to insert through a slot in the sidewall of the elevating platform. The rib includes an internal rib component and an external rib component, wherein each of the components include at least an arm and a stem. The rib is operable to support an external load, such as an attached apparatus.

A mounting rib for an elevating platform, the rib designed and configured to insert through a slot in the sidewall of the elevating platform. The rib is composed of a T-shaped and two L-shaped components, wherein the T-shaped component inserts through the slot and the L-shaped components are attached on the exterior of the platform. Also, a corner-mounted rib for an elevating platform.

Mounting plates for elevating platforms, including a mounting apparatus with interior and exterior reinforcement components elongated vertically. The interior reinforcement piece includes an embedded bolt that extends from the interior reinforcement piece, through a wall of the platform, and through the exterior reinforcement component. The interior and exterior reinforcement components have a stepped construction to convert peel stress to shear stress.

A step for an elevating platform, the step including a top flange, a bottom flange, and a transition; the step configured to insert into a cutout in the platform sidewall. The bottom flange is configured to contact an outer surface of the platform sidewall when the top flange contacts an inner surface of the sidewall, thereby placing all of the contact areas between the step and the platform under compression when force is applied to the step.

An active interface monitoring and warning system for fall arresting/prevention devices delivering specific fault condition messages to individuals who are subject to accidental falls or other safety hazards when performing construction or the like or when operating elevating construction machinery such as aerial lift work platforms and the like. The invention further provides a data logging system to record and transmit operational conditions, fault conditions and safety infractions.

A crane mechanism and a work platform with a load detection apparatus and integrated inclination sensor includes a load cell. The crane mechanism for moving the work platform can be mounted on a base and includes a tiltable boom. The load cell is arranged between the tiltable boom and the work platform as only connection and includes a force sensor and an inclination sensor. The force sensor is configured to detect a force, a lateral or yaw or torsional moment between the crane mechanism and the work platform. The inclination sensor is configured to determine an inclination of the work platform. The force sensor and the inclination sensor have a common housing.

A lift device comprises a base, a retractable lift mechanism, a work platform, a linear actuator, and a lift controller. The base has a plurality of wheels. The retractable lift mechanism has a first end coupled to the base and is moveable between an extended position and a retracted position. The work platform is configured to support a load. The work platform is coupled to and supported by a second end of the retractable lift mechanism. The linear actuator is configured to selectively move the retractable lift mechanism between the extended position and the retracted position. The lift controller is configured to monitor at least one lift characteristic associated with the linear actuator and to determine whether an actuator failure has been detected based on the at least one lift characteristic associated with the linear actuator.

A lift device comprises a base, a retractable lift mechanism, a work platform, a linear actuator, and a descent control mechanism. The base has a plurality of wheels. The retractable lift mechanism has a first end coupled to the base and is moveable between an extended position and a retracted position. The work platform is configured to support a load. The work platform is coupled to and supported by a second end of the retractable lift mechanism. The linear actuator is configured to selectively move the retractable lift mechanism between the extended position and the retracted position. The linear actuator has an electric motor. The descent control mechanism is configured to reduce a speed at which the retractable lift mechanism is moved from the extended position to the retracted position.

A machine includes a chassis having a first end and an opposing second end, an axle pivotally coupled to the first end of the chassis, a first actuator coupled to the first end of the chassis, and a second actuator coupled to the first end of the chassis. The chassis defines a longitudinal center axis. The axle is configured to rotate about the longitudinal center axis. The first actuator is positioned on a first lateral side of the longitudinal center axis. The first actuator is extendable to selectively engage a first contact point on the axle. The second actuator is positioned on an opposing second lateral side of the longitudinal center axis. The second actuator is extendable to selectively engage a second contact point on the axle.