Hydraulic tension regulating device for elongate tension bearing member

摘要

A device for limiting the tension in a rope or the like comprises an anchorage plate (8) and a gripping unit (10) containing two piston and cylinder units (34), two gripping members (14) and a hydraulic control circuit which controls the gripping of the rope or the like in a manner dependent on the tension in the rope or the like. Tension P causes the gripping unit (10) and the anchorage plate (8) to separate, thus compressing fluid in chambers (46). This results in the double acting rams (30) biasing the gripping members (14) towards each other under the action of cams (26). If the tension rises above a threshold value the pressurized fluid trips pressure sensitive valve (54) allowing pressurized fluid to reverse reversing valve (55) thus temporarily relaxing the grip on the rope or the like.