MINING MACHINE CUTTER FOR CUTTING, MAINLY, HARD ROCKS Russian patent published in 1994 - IPC

FIELD: mining. SUBSTANCE: cutter has holder with shank, symmetrical working head with hard-alloy insert secured in its socket. Insert-includes head with pointed apex and cylindrical body. Generating line of side surface of hard-alloy insert head has shape of arc of circle whose center is located at intersection of normal with tangent to circle arc in pointed apex of hard-alloy insert head and body base of hard-alloy insert. Beginning of circle arc forming side surface of head of hard-alloy insert is located in pointed apex of hard-alloy insert head. EFFECT: higher efficiency. 2 dwg