According to embodiments, a method for operating a lifting device monitoring with a control unit, monitoring current supplied to the lift actuator when the lift actuator is actuated; discontinuing the current supplied to the lift actuator when the current exceeds a current threshold value; determining an accumulated number of overload stops based on the current supplied to the lift actuator; determining at least one operating characteristic of the lifting device and an operating time of the lifting device as the lifting device is actuated; determining an accumulated load-time parameter for the lifting device based on the at least one operating characteristic and the operating time; and uploading, with a transceiver, at least one of the accumulated number of overload stops and the accumulated load-time parameter to at least one of the computer, the network, and the data storage device.

According to embodiments, a method for operating a lifting device monitoring with a control unit, monitoring current supplied to the lift actuator when the lift actuator is actuated; discontinuing the current supplied to the lift actuator when the current exceeds a current threshold value; determining an accumulated number of overload stops based on the current supplied to the lift actuator; determining at least one operating characteristic of the lifting device and an operating time of the lifting device as the lifting device is actuated; determining an accumulated load-time parameter for the lifting device based on the at least one operating characteristic and the operating time; and uploading, with a transceiver, at least one of the accumulated number of overload stops and the accumulated load-time parameter to at least one of the computer, the network, and the data storage device.

A device is operable to lift and transport a pipe at a worksite. The device includes a base, a mast coupled to the base, and a carriage coupled to the mast upon which the pipe is supportable. The device further includes a lifting assembly that is operable to move the mast and the carriage in a first direction to a desired elevation relative to the base and a positioning assembly that is operable to move the carriage relative to the mast in a second direction that is transverse to the first direction.

A crane, in particular a pick and carry crane, may have a front chassis with front wheels and a back chassis with back wheels, the front chassis being articulated relative to the back chassis so that the crane can travel whilst carrying a load suspended from a boom. The back and front wheels have independent suspensions which are capable of connection to one another so that movement of a left wheel influences movement of a right wheel, thereby improving the handing of the crane, particularly over rough terrain.

A mobile service rig includes an onboard rechargeable electric power storage system (e.g., a battery, supercapacitor, etc.) for powering the rig's hoist and drive wheels. Under battery power, the rig travels overland to service wellbores at various wellsites. Once at a wellsite, a pumpjack at the site is de-energized, and the hoist proceeds to remove and reinstall wellstrings (e.g., tubing and sucker rods). While the pumpjack is de-energized, the rig's onboard rechargeable electric power storage system taps into the electric power source normally used for the pumpjack. The drive wheels and hoist can drain the rig's rechargeable electric power storage system, but the pumpjack's electric power source can gradually recharge it while the rig is servicing the wellbore.

A mobile service rig includes an onboard rechargeable electric power storage system (e.g., a battery, supercapacitor, etc.) for powering the rig's hoist and drive wheels. Under battery power, the rig travels overland to service wellbores at various wellsites. Once at a wellsite, a pumpjack at the site is de-energized, and the hoist proceeds to remove and reinstall wellstrings (e.g., tubing and sucker rods). While the pumpjack is de-energized, the rig's onboard rechargeable electric power storage system taps into the electric power source normally used for the pumpjack. The drive wheels and hoist can drain the rig's rechargeable electric power storage system, but the pumpjack's electric power source can gradually recharge it while the rig is servicing the wellbore.

An engine hoist attachment assembly for hoisting a vehicle component includes a tube, a bar, and a pair of rods. The tube has a first end that is configured to slidably insert a terminus of a boom of an engine hoist to removably couple the tube to the boom. The bar has a back face that is coupled to and extends bidirectionally and perpendicularly from a second end of the tube so that the bar is substantially parallel to a surface upon which the engine hoist is positioned. The pair of rods is coupled to and extends in parallel from a front face of the bar. The rods are configured to position under a vehicle component, positioning a user to utilize the engine hoist to selectively lift and lower the vehicle component.

An engine hoist attachment assembly for hoisting a vehicle component includes a tube, a bar, and a pair of rods. The tube has a first end that is configured to slidably insert a terminus of a boom of an engine hoist to removably couple the tube to the boom. The bar has a back face that is coupled to and extends bidirectionally and perpendicularly from a second end of the tube so that the bar is substantially parallel to a surface upon which the engine hoist is positioned. The pair of rods is coupled to and extends in parallel from a front face of the bar. The rods are configured to position under a vehicle component, positioning a user to utilize the engine hoist to selectively lift and lower the vehicle component.

The disclosure provides a delivery vehicle. The delivery vehicle may be automated for delivering one or more containers to a delivery location and unloading the one or more containers at that location. The vehicle includes a vehicle body defining a bay therein. The vehicle also includes a plurality of container hangers mounted within the bay and an automated unloading arm movable between a retracted arm position and an extended arm position. The arm is at least partially received in the bay in the retracted arm position and extends from the body in the extended arm position. The unloading arm comprises at least one container carrying member, such as at least one hook, longitudinally movable along the unloading arm for selective longitudinal alignment with each of the plurality of hangers.

An engine hoist attachment assembly for hoisting a vehicle component includes a tube, a bar, and a pair of rods. The tube has a first end that is configured to slidably insert a terminus of a boom of an engine hoist to removably couple the tube to the boom. The bar has a back face that is coupled to and extends bidirectionally and perpendicularly from a second end of the tube so that the bar is substantially parallel to a surface upon which the engine hoist is positioned. The pair of rods is coupled to and extends in parallel from a front face of the bar. The rods are configured to position under a vehicle component, positioning a user to utilize the engine hoist to selectively lift and lower the vehicle component.