| 摘要 |
<p>A rescue system is provided which includes a hoist having a backplate (30) and a rope drum (36) mounted on said backplate, with the rope drum adapted to receive a rope (46) wound at least one and one half times about a rope engaging surface on the drum. The drum is rotatable in one direction (A) when a pulling force is exerted on a control end of the rope and blocked against rotation in an opposite direction (B) when a pulling force is exerted on a load end of the rope, so that the rope drum provides a braking force on said rope when a force is exerted on the load end of the rope. The hoist includes an arcuate rope guide (48) fixed to the backplate and extending at least 200° about the drum, and the drum itself is provided with a rope engaging surface including a cylindrical portion (42) and a tapered portion (44), with the tapered portion lying closest to said backplate. Additional system components for use in conjunction with the hoist include a centrifugal brake mechanism (110), a swivel pulley (210) and a handled acsender (310).</p> |
