Mounting system for raise and shaft cutters

Details Mounting system for raise and shaft cutters Mounting system for raise and shaft cutters

1994-07-07

1996-01-30

Bagnell, David J.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175364, F21B 1012

Patent

active

054874351

ABSTRACT:
A bit body with a mount having a leg that extends along the rotational axis of the bit, a journal with a wedge shaped end secured to a wedge shape opening in the leg. A wedge on the journal has a fastener hole to register coaxially with a fastener hole in the leg and receives a fastener to secure the wedge on the journal in the wedge shape in the leg. One side of the wedge shape is generally perpendicular to the bit axis, and the adjacent side of the wedge forms an acute angle with said perpendicular side. The acute angle is in a range of about thirty to sixty degrees, ideally about 35 degrees.

REFERENCES:
patent: 3749188 (1973-07-01), Schumacher, Jr.
patent: 3851718 (1974-12-01), Fink
patent: 3863994 (1975-02-01), Fink
patent: 4004644 (1977-01-01), Liljekvist et al.
patent: 4129392 (1978-12-01), Lupton
patent: 4202418 (1980-05-01), Waddell
patent: 4448271 (1984-05-01), Persson
patent: 4454923 (1984-06-01), Tibussek
patent: 4832135 (1989-05-01), Walk et al.

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