Rock drill bit having outer and inner rock-crushing buttons

Details Rock drill bit having outer and inner rock-crushing buttons Rock drill bit having outer and inner rock-crushing buttons

2007-11-20

2007-11-20

Neuder, William P (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Impact or percussion type

C175S419000

Reexamination Certificate

active

11206822

ABSTRACT:
A rock drill bit for percussive drilling includes a front face which has radially outer and inner portions. Fluid channels are disposed in the head portion in communication with the inner portion of the front face. The inner portion of the front face carries a plurality of front buttons. The outer portion comprises circumferentially spaced steel portions which are axially raised relative to the inner portion. Each raised portion carries one or two peripheral buttons located radially outwardly of an imaginary circle which intersects at least two of the front buttons and at least two of the flushing channels. The imaginary circle is arranged coaxially relative to the center axis.

REFERENCES:
patent: 3357507 (1967-12-01), Stewart
patent: 3955635 (1976-05-01), Skidmore
patent: 4598779 (1986-07-01), Liljekvist et al.
patent: 4862976 (1989-09-01), Meek
patent: 5743345 (1998-04-01), Hollar et al.
patent: 5794728 (1998-08-01), Palmberg
patent: 5890551 (1999-04-01), Lijebrand et al.
patent: 6494275 (2002-12-01), Asberg et al.
patent: 6971458 (2005-12-01), Kriesels et al.
patent: 7207402 (2007-04-01), Bjork
patent: 2001/0018990 (2001-09-01), Asberg et al.
patent: 2003/0230433 (2003-12-01), Hedlund et al.
patent: 2004/0065482 (2004-04-01), Larsson
patent: 2005/0072602 (2005-04-01), Pascale et al.
patent: 2006/0162965 (2006-07-01), Hadin
patent: 2006/0213691 (2006-09-01), Barton et al.
patent: 2006/0249309 (2006-11-01), Cruz
patent: WO 2006/033606 (2006-03-01), None
patent: WO 2006/054933 (2006-05-01), None

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