A retention system for a line on a spool is disclosed. The retention system may include a base component that includes a retention receiving element within a line-side surface of the base component. The retention system may include a line engagement component that includes an engagement surface, wherein the engagement surface includes a portion that is perpendicular to the base component to engage a line, wherein the engagement surface abuts the line-side surface. The retention system may include a removable retention component that is configured to retain the line between the engagement surface and the removable retention component when the removable retention component is installed within the retention receiving element.

A heavy equipment recovery winch system includes a winch assembly mountable to a drive end of a heavy equipment vehicle, a hydraulic assembly and a fairlead assembly. The hydraulic assembly is mounted to a portion of the heavy equipment vehicle and the hydraulic assembly is operatively connected to the winch assembly. The fairlead assembly is mountable to the drive end of the heavy equipment vehicle to assist with guiding a cable from the winch assembly.

A seafloor haulage system (10), for lifting seafloor materials from the seafloor to the surface, that has a line member (150), preferably synthetic rope, that extends at least partially between the seafloor and the surface and a container (400), preferably a plurality of containers, capable of carrying a load connected to the line member (150). The containers have a steerable element (410), such as a rudder, that enables the container to manoeuvre as it is propelled, typically towed by the line member, through the water.

A mobile mining machine includes a base with a deck and a counterweight box, a hoist drum supported on the deck, a motor drivably coupled to the hoist drum, a main transformer configured to supply power to the motor, an auxiliary transformer, and an electrical room coupled to the base. The main transformer and the auxiliary transformer are positioned inside the electrical room, and the electrical room contains at least one unguarded electrical connection.

A tracked vehicle comprising: a first and a second track; a generator assembly configured to generate mechanical power; a group of work devices coupled to the generator assembly; a first and a second drive wheel coupled to the first and to the second track, respectively, and to the generator assembly; a user interface configured to receive commands from an operator; and a control unit connected to the user interface to receive commands from the operator; the control unit being configured to: measure an amount of time elapsed between a command sent by the operator and a subsequent command sent by the operator; and set the tracked vehicle to a blocked state if the amount of time measured is greater than a first time interval threshold.

A method of dredging a bottom of a body of water is provided. Winching stations are positioned around the perimeter of an area to be dredged and a cable from each winching station is connected to a float. The cables pass through a variable resistance pulley assembly attached to a submersible assembly having a cutter and a submersible pump and are tensioned to suspend the submersible assembly. The cutter and submersible pump are activated and the winches are controlled to move the submersible assembly in a dredging pattern. When an obstacle is encountered the resistance of the pulley assembly is decreased and sufficient tension is applied to the cables to lift the submersible assembly toward the float.

A hydraulic driving apparatus that drives a plurality of driving subjects and regenerates energy thereof. This hydraulic driving apparatus includes: a first pump motor; a second pump motor that is switchable between a state of moving a first driving subject by hydraulic oil discharged from the first pump motor and a state of being operated as a pump by means of energy of the first driving subject; a first pump motor line that couples the first and second pump motors with each other; a first accumulator connected to the first pump motor line; a regeneration subject hydraulic actuator that moves a second driving subject; a second accumulator that receives hydraulic oil from the regeneration subject hydraulic actuator; a second pump motor line that couples the second accumulator with the first pump motor; and a pressure release changeover valve that opens/closes the second pump motor line.

A system for controlling operation of a winch assembly having an electric motor, a drum, and a cable. A controller is configured to access a winch load threshold, with the winch load threshold defining a hold zone and a reel zone, and one of the hold zone and the reel zone including loads greater than the winch load threshold and another of the hold zone and the reel zone including loads less than the winch load threshold. The controller is further configured to determine whether the drum is rotating, determine whether the winch assembly is operating within the hold zone or the reel zone, generate a hold current while the winch assembly is operating within the hold zone preventing rotation of the electric motor, and generate a reel current while the drum is operating within the reel zone permitting rotation of the electric motor.

A system for controlling a winch assembly having a hydraulic motor, a drum, a cable, and a cable tension sensor. A controller is configured to access a winch load threshold defining a hold zone and a reel zone, and one of the hold zone and the reel zone including loads greater than the winch load threshold and another of the hold zone and the reel zone including loads less than the winch load threshold. The controller is further configured to determine whether the winch assembly is operating within the hold zone or the reel zone, and generate a zero flow command while the winch assembly is operating within the hold zone to prevent rotation of the hydraulic winch motor, and generate a pressure differential command while the rotatable winch drum is operating within the reel zone to permit rotation of the hydraulic winch motor.

A hoist drum is disclosed for use with a power shovel. The hoist drum may have a body that is hollow and generally cylindrical, and an anchor connected to an outer annular surface of the body. The hoist drum may also have at least one stiffener located inside the body and extending in an axial direction of the body across the anchor.