Rotary cutting bit with material-deflecting ledge

Details Rotary cutting bit with material-deflecting ledge Rotary cutting bit with material-deflecting ledge

2007-04-17

2007-04-17

Singh, Sunil (Department: 3673)

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

Wear resistant feature for tool body

C299S104000

Reexamination Certificate

active

10641138

ABSTRACT:
A cutting bit includes a body having a front surface and a side surface, the side surface including a shoulder below the front surface and extending substantially perpendicular to a central axis of the body, and a ring that is harder than the body attached to the body at a front surface of the shoulder. Wear life of the cutting bit is enhanced by maintaining particular dimensional relationships regarding the position of the ring on the body, and the diameter of portions of the body.

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