Patent ID: 8579086
Filing Date: 2013-11-12
Classification: A62B

Abstract:
1. Fall arrest device comprising: a rope wound onto a drum; a return spring configured to be tensioned during unwinding of the rope from the drum; a locking device for locking the drum against rotation in a rope unwinding direction when a fall of a person secured by the rope occurs; a rope drive mechanism for unwinding the rope from the drum and for moving the rope downward, the rope drive mechanism comprising: a pressing wheel, and the rope is passed through a gap between the drive wheel and the pressing wheel and in the gap is in frictional contact with the wheels; wherein the sleeve is configured to be driven in a first direction of rotation by the motor via rotating the central shaft in the first direction which unwinds the rope and moves the rope downward; and wherein the motor is configured to rotate the central shaft in a reverse second direction of rotation to limit a rewinding speed of the rope by the return spring.