DRILLING BIT ROLLING CUTTER Russian patent published in 1995 - IPC

FIELD: mining, particularly, drilling equipment. SUBSTANCE: this drilling bit rolling cutter has flexible members made in the form of rings 3 whose inner diameters are smaller than outer diameter of body 1 at interrow grooves, faces of rings 3 carrying flexible members in the form of protrusions. Each ring 3 may have internal circular space which is open on inner diameter side. EFFECT: higher efficiency. 2 cl, 5 dwg