DIAMOND DRILL BIT WITH AIR BLOW-THROUGH Russian patent published in 2001 - IPC

FIELD: rock-breaking tools with air and air-and-water mixture blow-through. SUBSTANCE: diamond drill bit with air blow-through includes body and diamond-carrying matrix armored with diamonds, metallized by bimetal made of plasticizer and filling agent and grains of graphite placed between diamonds whose sizes are equal to sizes of diamonds. Circular cavity filled with substance whose thermal resistance is less than that of diamonds and materials of matrix and body is made in matrix and body. Bimetal plasticizer is included in composition of substance filling circular cavity and of materials of matrix and body. EFFECT: increased resistance of diamond drill bits. 1 dwg