1
Phillip E Bonnice: Rotary drill bit and method for making same. General Electric Company, Dennis A Dearing, Donald J Voss, Frank L Neuhauser, July 4, 1978: US04098362 (130 worldwide citation)

A rotary rock drill bit comprising a plurality of cutting elements or cutters mounted in the crown of the drill bit. Each cutting element comprises a thin planar layer of polycrystalline diamond bonded in the crown of the bit at a rake angle of between -10.degree. and -25.degree.. In another embodim ...


2
Ralph M Horton, Royce A Anthon: Low melting point copper-manganese-zinc alloy for infiltration binder in matrix body rock drill bits. Norton Company, Marmorek Guttman & Rubenstein, March 19, 1991: US05000273 (129 worldwide citation)

A novel infiltration alloy comprises about 5 to 65% by weight of manganese, up to about 35% by weight of zinc, and the balance copper. Preferably, the infiltration alloy comprises 20% by weight of manganese, 20% by weight of zinc, and the balance copper. The infiltration alloy is useful in the manuf ...


3
Phillip E Bonnice: Rotary drill bit and method for making same. General Electric Company, Morgan Finnegan Pine Foley & Lee, February 5, 1980: US04186628 (121 worldwide citation)

A rotary rock drill bit comprising a plurality of cutting elements or cutters mounted in the crown of the drill bit. Each cutting element comprises a thin planar layer of polycrystalline diamond bonded in the crown of the bit at a rake angle of between -10.degree. and -25.degree.. In another embodim ...


4
Lloyd W Sahley: Deep hole rock drill bit. Syndrill Carbide Diamond Company, Yount & Tarolli, May 1, 1984: US04445580 (93 worldwide citation)

Rock drill bit having shaving cutters on the leading end of a removable bit head for shaving the hole bottom and shaving reamer cutters extending lengthwise of the bit. The cutters and receiving slots therefor have dovetail configurations for trapping the cutters in the slots. Wedges for locating th ...


5
Goran Palmberg: Percussion rock drill bit. Sandvik, Burns Doane Swecker & Mathis L, August 18, 1998: US05794728 (93 worldwide citation)

A rock drill bit for percussive drilling includes a head and a shank. The shank has a central boring in which a thread is provided. The thread cooperates with a corresponding thread in a drill string driven by a top hammer. The boring is connected to at least one fluid passage which emerges in or in ...


6
Paul Polakoff: Large diameter rock drill. Conley Rose & Tayon, May 23, 1995: US05417292 (91 worldwide citation)

A large diameter rock drill includes a tubular body and a central shaft longitudinally axially disposed with respect to the body. The shaft extends longitudinally axially above the top edge of the body and is attached to a drive means. A plurality of angularly spaced apart vertical plates are attach ...


7
Lars Gunnar Lundell: Diamond enhanced rock drill bit for percussive drilling. Sandvik, Burns Doane Swecker & Mathis L, September 7, 1999: US05947215 (85 worldwide citation)

A rock drill bit for percussive drilling includes a steel body in which six gauge buttons and a single front button are mounted. The gauge buttons are arranged symmetrically and equally spaced about a central axis of the bit. The front button is arranged along the central axis. The front button is o ...


8
Lloyd L Garner: Rock bit with diamond reamer to maintain gage. Smith International, Christie Parker & Hale, February 20, 1979: US04140189 (84 worldwide citation)

A rock drill bit comprises a bit body and at least one rolling cone cutter mounted on the bit body, the rolling cone cutter comprising a plurality of tungsten carbide inserts including a plurality of gage inserts for drilling adjacent the peripheral wall of the hole being drilled. At least one diamo ...


9
Roy D Estes: Rock bit with vectored inserts. Rock Bit International, Arnold White & Durkee, March 30, 1993: US05197555 (59 worldwide citation)

An improved rotary cone cutter for rock drill bits having circumferential rows of wear resistant inserts. Inserts on the two outermost rows are oriented at an angle in relationship to the axis of the cone to either the leading side or trailing side of the cone. Such orientation will achieve either i ...


10
Robert Wagoner, Roger Didericksen, William M Conn, Peter Thomas Cariveau: Rock drill bit with back-reaming protection. Smith International, Conley Rose & Tayon P C, September 12, 2000: US06116357 (58 worldwide citation)

A drill bit for boring a bore hole in an earthen formation comprises: a bit body having a pin end, a cutting end and a longitudinal bit axis and including at least two legs extending from the cutting end, each of the legs including a bearing that rotatably supports a cutter cone. The bit body furthe ...