Invention Application
US20050212345A1 Rotary cutting bit having spark suppression sleeve 有权
旋转切割头具有火花抑制套筒

Rotary cutting bit having spark suppression sleeve
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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