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The latest generation of such a mechanical – now patented – release device can be seen in figure 10: Three small packs with wedges are situated in the housing of the BS. These wedges increase the axial force of the screws (power ratio 1:5) and they are also used to release the torque limiter. The device is sealed and the moving parts are equipped with hardened metal surfaces to prevent friction corrosion. The resetting of the wedges – when activating the TL – is carried out by the springs. The release device is operated very easily using a conventional screw wrench. Special tools such as a hydraulic pump are not necessary for the handling of this robust mechanical solution.
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