Patent ID: 8220323

Claim:
A safety device for a crosshead of a decoking plant, comprising: a crosshead arranged to be liftable and lowerable by means of a carrying device on profiles of a frame above a drum adapted to receive coke, wherein the crosshead is (1) guided on guide rails of the profiles by means of rolls, (2) carried by a cable of a winch slung around return pulleys at the top of the frame and around a carrying pulley rotatably supported at the top end of the crosshead; and (3) equipped with brakes for stopping the crosshead in an emergency, when the carrying device fails, and for intercepting the crosshead and fixing it on the guide rails or on the profiles; and a test apparatus for testing the crosshead brakes on site comprising a release device for releasing the crosshead from the carrying device in order to simulate a free fall of the crosshead and an arrestor device for the crosshead releasably attachable on the frame at a distance below the brace.