Once cut, rams or jacks elevate the platform above the cuts.

Once cut, rams or jacks elevate the platform above the cuts.

The volume flow rate is determined from the amplitude of the alternating lift forces on the vortex detector.

The lifting system (2) is provided with a driving element (40, 41) that acts in a substantially horizontal direction and is mechanically coupled to the braces (24) in order to raise and lower the longitudinal beam (4).

As the hoist arrangement is raised, the cage will rotate or swing in relation to the hoist arrangement due to the force of gravity acting on the pivotally mounted cage, and the cage may begin to oscillate.

The invention also relates to a lifting device (3) for a lowerable support leg (5) of a jack-up vessel (2), with a measuring device (15) for determining a leg load acting on the support leg (5).

The elevator has a compensating device acting on the hoisting ropes for equalizing and/or compensating the rope tension and/or rope elongation.

When the pressure medium is fed to the first connection A acting as the lifting side, the lifting gear is operated for lifting a load, and when fed to the lowering side B, for lowering a load.

Advantageously, the lifting device is a coil lifter with two lifting arms.

The lifting shall occur via designated lifting points.

The lift system includes a lift mechanism and a strand coupled to the lift mechanism.

Said lifting device comprises a first lifting shaft (65b) and a second lifting shaft, the lifting shafts each being provided with a toggle joint.

The freewheel can be released by a lifting solenoid (20) acting on the actuating pin (15) in the opposite direction to the spring (17).

The lift components may attach to the lift cart and/or other lift components.

The movable aperture member is actuated by a lift assembly comprising a lift ring and lift supports from the lift ring to the aperture member.