Earth boring device

Details Earth boring device Earth boring device

1981-11-13

1984-05-15

Pate, III, William F.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

384428, E21B 1010

Patent

active

044482710

ABSTRACT:
A roller cutter assembly for rotary boring of the face of earth formations comprising a boring head (16) and a plurality of roller cutters (14) mounted in mounting members (15). The bearing shafts (25) of the roller cutters (14) are secured to the mounting members (15) by members of clamping bolts (30). For purposes of eliminating the risk for failure of the clamping bolts (30) to occur the mounting members (15) are provided with a cap portion (31).

REFERENCES:
patent: 3835944 (1974-09-01), Bingham
patent: 3851718 (1974-12-01), Fink
patent: 3863994 (1975-02-01), Fink
patent: 4004644 (1977-01-01), Liljekvist et al.

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