A method for influencing a cable winch force acting on a cable drive, comprises the method steps providing a cable drive with a drivable winch and with a cable that can be wound on the winch, providing a device for producing a traction sheave cable force on the cable, determining an outer cable force, predetermining a cable drive operating state, providing a control-regulating unit to influence the traction sheave cable force, producing a control-regulating variable by means of the control-regulating unit depending on the outer cable force and the predetermined cable drive operating state, producing the traction sheave cable force by means of the device and influencing the traction sheave cable force by means of the control-regulating unit in such a way that the cable winch force acting on the cable drive can be controlled depending on the respective cable drive operating state and the outer cable force, wherein the device is a traction sheave drive, wherein a four-quadrant operation of the traction sheave drive is reproduced by means of the control-regulating unit, and wherein the four traction sheave drive operating states are no-load lifting, no-load lowering, load lifting and load lowering.

The invention relates to a winch system intended, in particular, for water sports, comprising at least one frame, at least one motor, a brake system, and a main tension cable wound around two spools, each spool being actuated by a motor such that when one of the spools unwinds the main cable, the other spool winds up the cable such as to maintain both the unwinding speed and the tension required for the main cable.

The invention relates to a winch system intended, in particular, for water sports, comprising at least one frame, at least one motor, a brake system, and a main tension cable wound around two spools, each spool being actuated by a motor such that when one of the spools unwinds the main cable, the other spool winds up the cable such as to maintain both the unwinding speed and the tension required for the main cable.

A security system for operations in wind generators, applicable to wind generators with a hoisting point (2), includes a cable (3) which is attached by one end to the element to be secured, normally a robotised unit (4), and by the other end to a counterweight (8), such that the cable (3) passes through a locking system (61) and a first pulley (6) which are attached to the hoisting point (2). The counterweight (8) can be installed on a pulley block (7) with at least two branches. The system ensures the integrity of the tower-nacelle assembly (1) and the robotised unit (4) in the event of the latter being detached.

A security system for operations in wind generators, applicable to wind generators with a hoisting point (2), includes a cable (3) which is attached by one end to the element to be secured, normally a robotised unit (4), and by the other end to a counterweight (8), such that the cable (3) passes through a locking system (61) and a first pulley (6) which are attached to the hoisting point (2). The counterweight (8) can be installed on a pulley block (7) with at least two branches. The system ensures the integrity of the tower-nacelle assembly (1) and the robotised unit (4) in the event of the latter being detached.

The process and apparatus for tension stringing a conductor through above-ground supports uses a length of rope affixed to the conductor wound on the tensioning machine and pulled by the puller machine. Each of the first and second stringing apparatuses includes an onboard control system which controls each of the first and second stringing apparatuses in pulling mode or in tensioning mode. Each of the first and second stringing apparatuses includes a motor/regenerative brake or other means of inducing tension into the conductor. Each of the machines includes a wireless transceiver which is hard-wired to said onboard control systems. A first operator resides on the puller machine and selects the machine as a puller machine operating in pulling mode using an onboard control system. An observer resides on the tensioner and selects the second machine to be the tensioner. Each of the wireless transceivers communicates with the other wireless transceiver enabling control of both the machines by the onboard control system of the puller machine.

The process and apparatus for tension stringing a conductor through above-ground supports uses a length of rope affixed to the conductor wound on the tensioning machine and pulled by the puller machine. Each of the first and second stringing apparatuses includes an onboard control system which controls each of the first and second stringing apparatuses in pulling mode or in tensioning mode. Each of the first and second stringing apparatuses includes a motor/regenerative brake or other means of inducing tension into the conductor. Each of the machines includes a wireless transceiver which is hard-wired to said onboard control systems. A first operator resides on the puller machine and selects the machine as a puller machine operating in pulling mode using an onboard control system. An observer resides on the tensioner and selects the second machine to be the tensioner. Each of the wireless transceivers communicates with the other wireless transceiver enabling control of both the machines by the onboard control system of the puller machine.

An unmanned robot system for a tethered robot, for example, a tethered aircraft, is disclosed. The unmanned system, in one embodiment, includes an unmanned aircraft tethered to a ground station by a tether cable. In one embodiment, an aerial winch and cable unit is provided on the aircraft to manage cable release. Alternatively, winch and cable units may be provided on both the aircraft and ground station. As the aircraft is now able to freely operate cable release to overcome any disturbances along the cable length, the operational effectiveness of the aircraft is greatly improved.

Various hoisting systems with heave compensation are provided. In one embodiment, an apparatus includes a hoisting system having a crown block and a drawworks. The drawworks includes a rotatable drum for reeling in and reeling out a hoisting line that is wound on the rotatable drum and reeved over the crown block. The hoisting system includes active heave control at the drawworks and a passive heave compensation system. Additional systems, devices, and methods are also disclosed.

Various hoisting systems with heave compensation are provided. In one embodiment, an apparatus includes a hoisting system having a crown block and a drawworks. The drawworks includes a rotatable drum for reeling in and reeling out a hoisting line that is wound on the rotatable drum and reeved over the crown block. The hoisting system includes active heave control at the drawworks and a passive heave compensation system. Additional systems, devices, and methods are also disclosed.