Rock drill bit assembly

Details Rock drill bit assembly Rock drill bit assembly

2004-04-07

2008-11-04

Wright, Giovanna Collins (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

C175S344000

Reexamination Certificate

active

07445063

ABSTRACT:
A drill bit assembly for direct removal of rock with a rotatable bit assembly (5) that includes a plurality of cutters or choppers (7). According to the invention, an number of cutters (7) are so disposed in relation to each other or the bit assembly (5) that a subsequent cutter (7b), seen in the direction of rotation, will engage an edge created by the action of preceding cutter (7a).

REFERENCES:
patent: 839837 (1907-01-01), Guttziet
patent: 1747908 (1930-02-01), Seifert

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