Patent ID: 7051822

Claim:
A drill bit assembly including a drill bit having a leading end to which a drill tip is fixed by bonding, said drill tip having a front cutting edge, a pair of side cutting edges, a rear end, and a pair of parallel side walls, said leading end being arranged to support said rear end and said parallel side walls of said drill tip, said drill bit including a bore extending axially therethrough and opening into said leading end, said drill tip extending across said bore in a lateral direction and permitting egress of flushing liquid from said bore, said drill tip including a locating structure arranged to engage an engagement face structure formed at said leading end of said drill bit to locate said drill tip in a prescribed bonding position relative to said leading end prior to bonding of said drill tip to said leading end, and to resist shifting movement of said drill tip in said lateral direction out of said prescribed bonding position during bonding of the drill tip.