Mine tool roof bit insert

Details Mine tool roof bit insert Mine tool roof bit insert

1992-04-13

1994-05-17

Melius, Terry Lee

Boring or penetrating the earth

Bit or bit element

Impact or percussion type

175427, E21B 1046

Patent

active

053119592

ABSTRACT:
A mine tool roof bit insert has two flat parallel sides extending in the long dimension of the insert and has two uppermost slanted surfaces extending between the two flat parallel sides. There is a trough at the top of the insert, which is between the two uppermost slanted surfaces and which is substantially orthogonal to the two flat parallel sides.

REFERENCES:
patent: 3807515 (1974-04-01), Evans
patent: 4342368 (1982-08-01), Denman
patent: 4356873 (1982-11-01), Dziak
patent: 4688652 (1987-08-01), Crist
patent: 4787464 (1988-11-01), Ojanen

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