Rotary cutting bit having spark suppression sleeve

Details Rotary cutting bit having spark suppression sleeve Rotary cutting bit having spark suppression sleeve

2007-02-06

2007-02-06

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

10845556

ABSTRACT:
A cutting pick includes an elongate shank, a cutting tip fixed to one end of the shank to project from that end and which is of a material that is harder than the material of the shank, and an annular sleeve which is attached about the shank adjacent the cutting tip. The sleeve is of a material (e.g., tungsten carbide) which is harder than the material of the shank and which has a lower propensity for incendive spark production during a cutting operation than the material of the shank. The sleeve includes a plurality of annular sleeve portions which are attached about the shank immediately adjacent to each other.

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