DRILL BIT FOR A DOWN-THE-HOLE DRILL HAMMER HAVING NONCONCENTRICALLY OR SPIRALLY ARRANGED CUTTING INSERTS

摘要

A drill bit for a down-the-hole drill hammer is provided that includes a head and a shank extending from the head. The head includes a plurality of non-concentrically or spirally arranged cutting members about its working face. The non-concentric or spiral arrangement of the cutting members in the drill bit and their overlapping cutting paths during rotation of the drill bit reduces the presence of concentric grooves or valleys being cut into the earthen terrain impacted by the bit thereby resulting in more complete cutting coverage.

主权项

1. A drill bit for a down-the-hole drill hammer comprising:
a shank; and a head extending from the shank, the head including:
a plurality of cutting members arranged in a spiral configuration or nonconcentric configuration.