FIELD: mining.
SUBSTANCE: device comprises a tubular shell with longitudinal slots, filled with a plastic substance, a sleeve screwed onto its end and having a threaded central hole, where a screw is screwed in, and an elastic shell placed onto a tubular shell. The screw is made in the form of a bushing with an outer thread, where a rod is inserted as capable of longitudinal displacement limited in its respect. In the elastic shell there are longitudinal slots made that match with longitudinal slots of the tubular shell. The bushing with the outer thread and the rod are connected to each other so that they eliminate possibility of their rotation relative to each other.
EFFECT: increased efficiency of device operation.
2 cl, 2 dwg
