DEVICE FOR CRUSHING ROCK Russian patent published in 1998 - IPC

FIELD: mining industry. SUBSTANCE: this can be used for producing stone blocks. Device has working member, double-action hydraulic cylinder, spring shackle, and replaceable bushes of different height. Working member is made up of wedge positioned between expanding jaws. Wedge is rigidly connected with piston. Upper parts of outer surfaces of wedge and working jaws are made parallel to longitudinal axis of working member. Expanding jaws are fastened on spring shackle. Installed on shackle with embracement of upper part of working member are replaceable bushes. Depth of intervening of working member into bore-hole is set by selecting bushes of certain height. EFFECT: high efficiency. 1 dwg