BORING CUTTER WITH REINFORCED ARMOR OF CLAWS BACKS Russian patent published in 2004 - IPC

FIELD: boring equipment engineering.

SUBSTANCE: device has body with claws, on which a directed layer of hard alloy is placed with roller hits moveably fixed on pins of said claws, roller hits having rock-destroying teeth. On deflector and back of each claw grooves are made, inside which a directed layer of hard alloy is placed. On deflector of claws bottom of the groove is made slanting at sharp angle α opening in direction from edge of claw deflector.

EFFECT: lower intensiveness of abrasive wear of deflectors of claws, area of embedding of locking finger and the rest of claw back surface, providing for higher durability of support and boring cutter as a whole.

3 cl, 25 dwg