| 摘要 |
A pulley with an unlockable clamp, comprising a rotary roller, a pivoting trigger designed to release and clamp the rope against the roller, and control means to keep the trigger in the inactive position disabling action of the clamp, wherein the control means comprise a lock fixed onto the first flange-plate and able to be actuated from a locked position to an unlocked position to enable movement of the trigger to the inactive position. |
