TIGHTENING DEVICE FOR ROPE ANCHORING BOLT Russian patent published in 2006 - IPC E21D21/00 

FIELD: mining, particularly mine contour bolting.

SUBSTANCE: tightening device comprises support clutch connected to rope strands by means of conical bush in axial orifice provided with conical transition part connecting section with larger diameter to section with lesser one. Conical bush encloses central strand and passes into cylindrical bush part in radial direction in the same way as mating clutch surface passes into cylindrical part. The cylindrical bush part is located in cylindrical part of axial clutch orifice to create gaps between rope strands at clutch end to which sealing means is fastened. Opposite walls of axial orifice created at opposite support clutch end are opened with orifices extending transversely to axial orifice to provide quick-releasable connector fork arrangement in the orifices.

EFFECT: possibility to inject fixing compositions through the tightening device.

2 cl, 4 dwg