BIT FOR BLASTHOLE DRILLING Russian patent published in 2003 - IPC

Abstract RU 2212510 C2

FIELD: mining, more specifically, bits for blasthole drilling in rocks. SUBSTANCE: bit includes wings provided with hard alloy inserts and shank. Edges are made in form of equidimensional rectilinear sections. Points of edge bending are located on flat curve convex towards face, particularly, on arch circumscribing the circumference edge. EFFECT: simplified bit design. 1 dwg

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RU 2 212 510 C2

Authors

Dvornikov L.T.

Prokushenko S.I.

Polyntsev N.A.

Vechuzhanin D.S.

Kalinin V.V.

Dates

2003-09-20—Published

2001-12-06—Filed