There is described a hoisting system and method of lifting that make use of a particular fibre rope. The fibre rope includes a plurality of magnets that are embedded within the fibre rope and spaced apart along the rope with a known axial distance between the magnets. The system may include a fibre rope hoisting speed sensor, and a magnetic field sensor that can sense the presence of the magnetic field of the embedded magnets. Using the sensors, the hoisting speed of the rope may be determined by: measuring the time between the passing of consecutive magnets by using the magnetic field sensor; calculating the distance between consecutive magnets using the hoisting speed sensor and the measured time between the passing of the consecutive magnets; and comparing the calculated distance between the magnets with an original, predefined distance between the magnets.

Provided is a wire rope flaw detector according to the present invention includes a magnetizer configured to form a magnetic path in a predetermined segment of a wire rope, a magnetic sensor configured to detect a leakage magnetic flux generated from the wire rope, and a protective cover configured to prevent the wire rope from being brought into contact with the magnetic sensor. The wire rope flaw detector further includes a magnetic sensor protecting member configured to prevent the protective cover from being brought into contact with an upper face of the magnetic sensor so as to prevent application of a pressure equal to or larger than a predetermined pressure to the magnetic sensor.

Provided is a wire rope flaw detector according to the present invention includes a magnetizer configured to form a magnetic path in a predetermined segment of a wire rope, a magnetic sensor configured to detect a leakage magnetic flux generated from the wire rope, and a protective cover configured to prevent the wire rope from being brought into contact with the magnetic sensor. The wire rope flaw detector further includes a magnetic sensor protecting member configured to prevent the protective cover from being brought into contact with an upper face of the magnetic sensor so as to prevent application of a pressure equal to or larger than a predetermined pressure to the magnetic sensor.

A crane having at least one jib system, a sensor unit for detecting a deformation of the jib system transversely to a load plane, and to an activatable adjustment unit for influencing the deformation of the jib system transversely to the load plane.

A crane having at least one jib system, a sensor unit for detecting a deformation of the jib system transversely to a load plane, and to an activatable adjustment unit for influencing the deformation of the jib system transversely to the load plane.

A method of testing a shipping container (10) for use as an upper container in a vertical tandem lift configuration the method comprising supporting the container other than by the lower corner fittings (15), connecting couplers (18) in the lower corner fittings of the container to be tested and then applying a proof load on the couplers to confirm that the container and/or the couplers can sustain the forces at least through the lower corner fittings which will be experienced during use in a vertical tandem lift. The invention also provides a rig (70, 143) for carrying out the proof test and/or for connecting or disconnecting couplers to or from the lower corner fittings of a shipping container. Various corner units for use in such a rig are also disclosed.

Adaptable clevis kits may be used when calibrating crane scales, dynamometers and tension links for force calibration laboratories. An adaptable clevis kit may include one set of devises (one pair) with multiple sets of pins with different diameters. With this kit, the same set of devises may be used for calibrating several models of instruments. For each instrument, the pin may be designed with the same diameter that the manufacturer originally made the equipment and reported on its specification sheets. With this method, the error due to difference in pin sizes is eliminated, and the laboratory may save the cost of purchasing dozens of different devises. The adaptable clevis kits may also be provided with a guiding table that help the user find the right size pin for the instrument being calibrated based on the manufacturer's original design.

Adaptable clevis kits may be used when calibrating crane scales, dynamometers and tension links for force calibration laboratories. An adaptable clevis kit may include one set of devises (one pair) with multiple sets of pins with different diameters. With this kit, the same set of devises may be used for calibrating several models of instruments. For each instrument, the pin may be designed with the same diameter that the manufacturer originally made the equipment and reported on its specification sheets. With this method, the error due to difference in pin sizes is eliminated, and the laboratory may save the cost of purchasing dozens of different devises. The adaptable clevis kits may also be provided with a guiding table that help the user find the right size pin for the instrument being calibrated based on the manufacturer's original design.

A method and system for conducting a non-contact survey of an overhead crane runway system using a survey apparatus that is alternately located in the crane bay or on a crane bridge girder. Disclosed more particularly are a method and system for testing an overhead crane runway beam 3D alignment or an overhead crane runway rail 3D alignment using a 3D laser scanner.

A method for securing a luffing jib crane includes: acquiring a lifting/lowering setpoint; piloting a lifting motor by a converter that applies a motor command speed as a function of the setpoint; driving, in lifting or in lowering, the jib by a lifting cable under the action of the lifting motor; calculating, by a control/command system, a lifting/lowering theoretical angular speed from the motor command speed or from the setpoint; calculating, by the control/command system, a lifting/lowering actual angular speed from a jib angle measured by an angle sensor; comparing the actual angular speed and the theoretical angular speed; and commanding the stopping of the lifting motor according to the result of the comparison.