A lift device and a method of controlling the lift device are provided. The lift device has a lifting mechanism supporting a lifting platform relative to the chassis. An electric motor is drivingly coupled to a traction device, and a traction battery is in electrical communication with the electric motor. A user input is provided to control a speed of the lift device by inputting a requested speed. A controller is configured to, in response to the lift device being on a non-zero grade and if the requested speed is greater than a predetermined speed, command the electric motor to output a braking torque and provide electrical power to the traction battery, and limit the speed of the lift device to the predetermined speed.

A work gondola apparatus is provided with: a work cage into which a worker boards; equipment mounting parts disposed on both outer sides of the work cage; battery-driven elevating/lowering mechanisms which are mounted to the respective equipment mounting parts and which elevate/lower the work cage to a working location by means of cables that are being suspended; and batteries for driving the respective elevating/lowering mechanisms.

A vehicle system includes a first work machine including a first actuator and a first control system, a second work machine including a second actuator and a second control system, and a user input system including a transceiver and a user interface. The user input system is configured to receive a user input via the user interface and provide a signal to both the first control system and the second control system. The first control system and the second control system are configured to receive the signal and thereafter operate the first actuator of the first work machine and the second actuator of the second machine in a coordinated mode of operation. The user input system is configured to provide, and the first control system and the second control system are configured to receive, the signal simultaneously thereby reducing latency between motion of the first work machine and the second work machine in the coordinated mode of operation.

A personal safety system for lifting material or supporting person therefrom includes a base and a mast rotatably coupled to the base. The mast has a plurality of mast sections that telescope relative to each other along an axis such that the mast is movable into and between a lowered configuration and an extended configuration. A jib is coupled to the mast and a cable is coupled to the jib such that a cable is configured to couple to the material or the person such that the system is capable of lifting the material or supporting the person. An attachment device coupled to the base is configured to permit a vehicle to couple to the system via the attachment device.

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.

A fall-protection system including a harness and a fall-protection apparatus with a lifeline bearing a connector configured to be connected to the harness; and, a fall-protection monitoring system with a base unit and with at least one sensor module configured to sense a condition of the connector and to communicate a signal indicative of the condition of the connector to the base unit.

A system for automatic generation of a work site equipment grouping is provided. The system includes a plurality of work machines, each work machine configured to wirelessly communicate with other work machines. The system also includes a local area network including a plurality of communicatively connected nodes. The nodes include the work machines. The work machines are configured to create and join the local area network when the work machines are within a signal range of one or more of the plurality of nodes.

In a vehicle with aerial work platform, while not receiving an operation instruction to move down the work platform from the rise and fall operating device, when moving down of the work platform is detected based on the detecting result of the rise and fall position detecting device, the rise and fall control device controls the first switching valve to switch so that the bottom-side oil chamber is connected to the hydraulic pump and controls the second switching valve to switch to the first state so as to make oil pressure in the bottom-side oil chamber be kept by the second switching valve and the check valve. Then, the rise and fall hydraulic cylinder is stopped to be contracted.

A lift device includes a chassis, a platform configured to support a user, a lift assembly coupling the platform to the chassis, an actuator configured to at least one of (a) move the platform relative to the chassis or (b) propel the chassis, a sensor assembly, and a controller. The sensor assembly includes a bar including a first end portion coupled to the platform and a second end portion opposite the first end portion. The sensor assembly further includes a sensor coupled to the platform and configured to provide a signal in response to the second end portion of the bar contacting the sensor. The controller is operatively coupled to the sensor and the actuator and configured to control the actuator based on the signal from the sensor.

Systems and methods for platform occupancy detection on an aerial device are described. An aerial platform may be provided for the aerial device. A worker may perform operations in the aerial platform and connect to an interlock system thereof. The worker may have an associated transmitter configured to transmit a signal. A first receiver and a second receiver may be disposed on the aerial platform to receive the signal. Based on the time difference between receiving the signal at the first receiver and receiving the signal at the second receiver, the position of the transmitter may be triangulated. If the transmitter is determined to be within the aerial platform and the worker is not connected to the interlock system, preventive actions may be taken before operation of the aerial platform is permitted.