| 摘要 |
PCT No. PCT/FR90/00167 Sec. 371 Date Oct. 31, 1990 Sec. 102(e) Date Oct. 31, 1990 PCT Filed Mar. 13, 1990 PCT Pub. No. WO90/10476 PCT Pub. Date Sep. 20, 1990.A self-jamming descender for a rope comprises a first base flange equipped with an articulation spindle and a first fixed pulley, a mobile support plate with an operating lever pivotally mounted on the spindle, and a second pulley securedly united to the support plate and eccentric with respect to the spindle. The second pulley comprises a boss cooperating with a first braking surface of the first pulley when the lever is in a first jamming position. The pivoting support plate is provide with a jamming cleat, separated from the second pulley by a space through which the rope passes, and cooperating with a second braking surface when the handle is moved to a second jamming position. Unjamming of the descender takes place in an intermediate position of the operating lever. |
