Methods of forming earth-boring tools having features for...

Details Methods of forming earth-boring tools having features for... Methods of forming earth-boring tools having features for...

2011-02-09

2011-12-20

Neuder, William P (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

C076S108200, C175S393000

Reexamination Certificate

active

08079427

ABSTRACT:
Methods of forming earth-boring tools include assembling a plurality of head sections about a longitudinal axis to form a bit body, rotatably mounting a cutter to a cutter bearing shaft of each head section, and forming at least one groove on an outer surface of a bit leg of at least one head section, causing the at least one groove to extend along a curved path from a leading side of the bit leg to a trailing side of the bit leg between an upper sidewall and a lower sidewall.

REFERENCES:
patent: 4091884 (1978-05-01), Thomas
patent: 5547033 (1996-08-01), Campos, Jr.
patent: 5553681 (1996-09-01), Huffstutler et al.
patent: 6450270 (2002-09-01), Saxton
patent: 7182162 (2007-02-01), Beuershausen et al.
patent: 2010/0089656 (2010-04-01), Ho et al.
International Search Report for International Application No. PCT/US2009/049680 mailed Feb. 18, 2010, 3 pages.
Written Opinion for International Application No. PCT/US2009/049680 mailed Feb. 18, 2010, 5 pages.

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