Insert for tungsten carbide tool

Details Insert for tungsten carbide tool Insert for tungsten carbide tool

1993-09-02

1996-01-16

Dang, Hoang C.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

Wear resistant feature for tool body

299111, E21B 1000

Patent

active

054841917

ABSTRACT:
Tungsten carbide inserts which are the cutting tips of a rotating excavating tool have a forwardmost cutting end and an intermediate cutting surface which are formed of tungsten carbide alloys having different degrees of hardness. In a preferred embodiment of the invention, the center of each insert is formed of a harder tungsten carbide material than is the outer cutting portion located rearwardly of the harder center portion. In another embodiment of the invention, the intermediate cutting section comprises a plurality of longitudinally extending buttresses which break up the material being excavated as the insert penetrates the material.

REFERENCES:
patent: 2842342 (1958-07-01), Haglund
patent: 3361481 (1968-01-01), Maddock
patent: 3476438 (1969-11-01), Bower, Jr.
patent: 3746396 (1973-07-01), Radd
patent: 3833264 (1974-09-01), Elders
patent: 4176725 (1979-12-01), Shields
patent: 4854405 (1989-08-01), Strout
patent: 5131725 (1992-07-01), Rowlett et al.
patent: 5324098 (1994-06-01), Massa et al.

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