A pulley block for stringing an electrical conductor 15, the pulley block including a frame 16 and at least one moveable pulley wheel 17A, 17B. Each moveable pulley wheel is mounted to the frame by a respective mounting means for rotation about a respective rotation axis 19 and in a respective plane of rotation 20A, 20B. Each respective mounting means is configured to permit movement of the respective plane of rotation relative to the frame. The movement may be a turning movement about a turn axis. The turn axis may be orthogonal to the corresponding rotational axis. A further fixed pulley wheel 18 may be mounted to the frame by a fixed mounting which only permits rotational movement. The mounting means may comprise a spherical bearing and a restoring means to keep the movable pulley wheel in an equilibrium position. The pulley wheel and its mounting means are further claimed independently of the pulley block. There is additionally disclosure for a method of pulling a conductor cable with a non-circular cross section using the pulley block described above in which the pulley block is suspended from a pylon and the conductor is pulled through the pulley block.
Improvements in or for pulley blocks
2018-06-27
Patent
Elektronische Ressource
Englisch
Lifting hook device with pulley blocks and operation machine
Europäisches Patentamt | 2021
|