DRILLING CHISEL CUTTER Russian patent published in 2005 - IPC

FIELD: mining industry.

SUBSTANCE: cutter has cone-shaped body, on which main crowns and peripheral calibrating crown with rock-destroying elements are positioned, while axis of rock-destroying element, positioned on peripheral calibrating crown, is directed at an angle to chisel portion axis. Peripheral calibrating crown is placed on conical surface, vertex of which lies beyond well limits. Axis of rock-destroying element, positioned on peripheral calibrating crown, passes through point, lying on a circle, formed by intersection of well wall with face plane.

EFFECT: higher durability of chisel.

2 dwg