TIGHTENING DEVICE FOR ROPE ANCHORING BOLT Russian patent published in 2006 - IPC E21D20/00 

FIELD: mining, particularly means for mine contour bolting.

SUBSTANCE: tightening device comprises clutch connected to rope in axial orifice by means of wedge-like bush. The bush comprises thread and nut located on outer surface thereof. Annular groove is formed in clutch end, which receives rope. Guiding means surrounding the rope is installed in the annular groove. Opposite clutch end has outer surface defining hexahedron.

EFFECT: increased flexural rigidity of cable part connected to clutch, simplified clutch structure and increased operational efficiency.

2 cl, 2 dwg