A rope-suspended leader mast includes a lower part for accommodating a material to be pile-driven and an upper part for accommodating a diesel pile driver having a fuel feed. The leader mast is provided with at least one securing rope. A fuel feed interrupter interrupts the fuel feed of the diesel pile driver accommodated by the rope-suspended leader mast when the securing rope is tensioned.

Hydraulic supply systems and cranes incorporating the same are disclosed. Hydraulic supply systems may include an auxiliary hydraulic circuit that includes a pump, a power source, and a plurality of plumbing elements. The hydraulic supply systems may further include a control system that controls operation of at least a portion of the plurality of plumbing elements and a control panel that is positioned remotely from the control system and is in communication with the control system, where the control panel provides selective input to the control system.

Hydraulic supply systems and cranes incorporating the same are disclosed. Hydraulic supply systems may include an auxiliary hydraulic circuit that includes a pump, a power source, and a plurality of plumbing elements. The hydraulic supply systems may further include a control system that controls operation of at least a portion of the plurality of plumbing elements and a control panel that is positioned remotely from the control system and is in communication with the control system, where the control panel provides selective input to the control system.

An industrial robot has at least one translational or rotational axis, having an output element that has a toothing and at least one axis drive assembly that is associated with the translational or rotational axis and that meshes with the output element. The axis drive assembly has a drive motor and at least one transmission arranged downstream of the drive motor. In the case of a translational axis, the output element is a toothed rod. In the case of a rotational axis, the output element is a spur gear with an outer toothing. In addition, the transmission has at least one branching stage that distributes the rotational movement of the motor shaft of the drive motor to at least two gear trains, such that at least two pinions driven by means of the drive motor mesh with the output element.

A pile driving method for driving a pile, e.g. a hollow and open ended pile, e.g. a large diameter pile having an outer diameter of at least 5 meters, e.g. a monopile of an offshore wind turbine, into the soil, e.g. into the seabed. Use is made of a pile driving system which comprises a drive head member that is configured to engage the pile, and a solid mass drop weight assembly comprising a support structure and comprising solid drop weight elements supported by said support structure, preferably solid steel drop weight elements being composed of steel elements, e.g. stackable steel elements, which drop weight elements have a total mass of at least 100 tonnes, e.g. more than 500 tonnes. e.g. more than 1000 tonnes, e.g. more than 2000 tonnes, which drop weight assembly is vertically mobile relative to, e.g. above, the drive head member. Further use is made of a lift system that is configured to bring the drop weight assembly into an initial height position relative to the drive head, and a quick release system adapted to effect quick release of the lift system.

A pile driving method for driving a pile, e.g. a hollow and open ended pile, e.g. a large diameter pile having an outer diameter of at least 5 meters, e.g. a monopile of an offshore wind turbine, into the soil, e.g. into the seabed. Use is made of a pile driving system which comprises a drive head member that is configured to engage the pile, and a solid mass drop weight assembly comprising a support structure and comprising solid drop weight elements supported by said support structure, preferably solid steel drop weight elements being composed of steel elements, e.g. stackable steel elements, which drop weight elements have a total mass of at least 100 tonnes, e.g. more than 500 tonnes. e.g. more than 1000 tonnes, e.g. more than 2000 tonnes, which drop weight assembly is vertically mobile relative to, e.g. above, the drive head member. Further use is made of a lift system that is configured to bring the drop weight assembly into an initial height position relative to the drive head, and a quick release system adapted to effect quick release of the lift system.

A pile-driver assembly for driving a pile into the ground, preferably offshore, and a method of driving a pile into the ground using the pile-driver assembly is disclosed. The assembly includes a casing defining a chamber, the chamber being configured to house a fluid. The assembly further includes a positioning element configured to position the casing at or on the pile, wherein at least a portion of the positioning element is positioned between the chamber and the pile. The assembly further includes actuating means, wherein actuation of the actuating means displaces the chamber relative to the positioning element, such that the chamber moves away from the pile, and wherein the actuating means is configured to release the chamber for displacement towards the pile such that a force is exerted by the chamber on the positioning member, to controllably drive the pile into the ground.

Provided a hammer raising device configured to increase striking intensity by eliminating fluid resistance when a piston raised upward moves downward. To achieve this, the hammer raising device includes a hydraulic control valve that controls a supply of a fluid, a sub cylinder to which the fluid is supplied by an operation of the hydraulic control valve, a sub piston that is partially accommodated within the sub cylinder, and is raised or lowered by the fluid, a main piston that comes in close contact with a longitudinal end of the sub piston to be raised by the raising of the sub piston, and is lowered when the closely contacted longitudinal end of the sub piston is separated, and a main cylinder that accommodates the main piston.

A method for optimizing the driving of a pile into the ground by a pile-driving machine using a hammer ram; moving a block for driving the pile towards the end of the pile with an impact energy (W.sub.kin); determining a kinetic variable (Q1) of the impact, proportional to the kinetic energy of the block, when the block is moving towards the pile in the pile driving direction; determining the value of a kinetic variable (Q3) of the return motion, proportional to the kinetic energy of the block, when returning, after an impact on the pile, in a direction opposite to the pile driving direction; calculating a kinetic variable ratio (Q1/Q3); comparing (Q1/Q3) with a predetermined target value (Q1/Q3.sub.tav) for (Q1/Q3), producing the shortest possible total pile driving time (t.sub.tot); adjusting the impact energy (W.sub.kin) of the next impact so (Q1/Q3) of the next impact is changed towards (Q1/Q3.sub.tav).

A method for optimizing the driving of a pile into the ground by a pile-driving machine using a hammer ram; moving a block for driving the pile towards the end of the pile with an impact energy (W.sub.kin); determining a kinetic variable (Q1) of the impact, proportional to the kinetic energy of the block, when the block is moving towards the pile in the pile driving direction; determining the value of a kinetic variable (Q3) of the return motion, proportional to the kinetic energy of the block, when returning, after an impact on the pile, in a direction opposite to the pile driving direction; calculating a kinetic variable ratio (Q1/Q3); comparing (Q1/Q3) with a predetermined target value (Q1/Q3.sub.tav) for (Q1/Q3), producing the shortest possible total pile driving time (t.sub.tot); adjusting the impact energy (W.sub.kin) of the next impact so (Q1/Q3) of the next impact is changed towards (Q1/Q3.sub.tav).