| 摘要 |
In a first embodiment a fall arrest device comprises a rotatable drum 103 for winding a safety line thereon, a speed responsive engagement arrangement which is responsive to the speed of rotation of the drum and an energy absorber ring 104 for providing an interference fit between a first and second component of the drive. In a second embodiment the device comprises a speed responsive engagement arrangement in the form of a pawl carrier 121 arranged to be rotatable with a drum and carrying one or more rotatably mounted engagement pawls 130, 140; each pawl being biased radially outwardly by a respective biasing element (135, Fig 11). In a third embodiment the safety device comprises an energy absorber ring 104 configured to absorb energy in the event of a fall and positioned to provide an interference fit between a seat (110a, Fig 10) and a first o-ring seal (111, Fig 10) at one side of the ring, and, a seating surface for the first o-ring and a second surface (115, Fig 10) for seating a second o-ring seal (113, Fig 10) at the other side of the energy absorbing ring. |
