Patent ID: 8584814

Claim:
Self-arresting rope belay device comprising: a flange-plate having a braking surface; a cam articulated on the flange-plate configured to clamp a rope against the braking surface when the rope is under tension; and a lever articulated on the cam and being movable between a folded rest position and an active position to progressively release the rope by manual action on the lever, the lever including a stud coming into contact with a stop of the flange-plate before the lever reaches an end of rotation position on the cam when the lever is turned from its folded position to its active position, wherein displacement of the lever on the cam is performed: (i) with a geared-down effect in an initial part of its release travel, and (ii) with a direct effect in a final part of its travel; and wherein relative movement of the cam with respect to the lever is smaller in the initial part than in the final part.