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Class Information
Number: 384/92
Name: Bearings > Rotary bearing > Roller drill bit
Description: Subject matter for specified bearing structure for a rotary bit in which a cutter element, or carrier for a fixed cutter is rotatably mounted thereon so that the cutter element, or carrier may roll, or tend to roll on a surface of a borehole as the bit is rotated.

Sub-classes under this class:

Class Number Class Name Patents
384/95 Inserts or bearing surface detail 100
384/93 Lubricating detail 103
384/96 Roller cone retaining means 53
384/94 Seal detail 119

Patents under this class:

Patent Number Title Of Patent Date Issued
8337085 Air circulation ports in rotary rock bit journal bearing Dec. 25, 2012
8277124 Bearing apparatuses, systems including same, and related methods Oct. 2, 2012
8147142 Bearing assembly, and bearing apparatus and motor assembly using same Apr. 3, 2012
7901137 Bearing assembly, and bearing apparatus and motor assembly using same Mar. 8, 2011
7621346 Hydrostatic bearing Nov. 24, 2009
7237627 Bearing and lubrication system for earth boring bit Jul. 3, 2007
7044242 Roller cone bits with reduced packing May. 16, 2006
6416224 Rolling cutter drill bits Jul. 9, 2002
6254275 Sealed bearing drill bit with dual-seal configuration and fluid-cleaning capability Jul. 3, 2001
6250407 Rotary drill bit having filling opening for the installation of cylindrical bearings Jun. 26, 2001
5725313 Rolling cutter drill bits Mar. 10, 1998
5642942 Thrust plugs for rotary cone air bits Jul. 1, 1997
5307887 Earth boring bit with improved thrust bearing May. 3, 1994
5190379 Bearings for roller cutter assembly Mar. 2, 1993
5024539 Friction bearing and cone retention thrust system for a rock bit Jun. 18, 1991
4819517 Selected bearing couple for a rock bit journal and method for making same Apr. 11, 1989
4793719 Precision roller bearing rock bits Dec. 27, 1988
4750573 Drill bit having a flush-out port Jun. 14, 1988
4646858 Earth boring bit with air system access Mar. 3, 1987
4593774 Downhole bearing assembly Jun. 10, 1986
4555186 Amorphous alloy plain bearings Nov. 26, 1985
4437774 Drilling bit bearings Mar. 20, 1984
4395076 Bearing design for drill bit Jul. 26, 1983
4378058 Reamer-stabilizer Mar. 29, 1983
4293167 Rolling cutter drill bit with improved journal configuration Oct. 6, 1981
4284310 Rotary drill bit Aug. 18, 1981
4279316 Earth boring bit with eccentric seal boss Jul. 21, 1981
4274874 Copper-tin type sintered alloy for oil-impregnated bearing excellent in bearing performance as bearing used in low-load and high-velocity region Jun. 23, 1981
4266622 Rotary rock bit and method of making same May. 12, 1981
4256193 Rotary drill bit with rotary cutter Mar. 17, 1981
4235295 Earth boring bit with renewable bearing surface Nov. 25, 1980
4207658 Journal and pilot bearings with alternating surface areas of wear resistant and anti-galling materials Jun. 17, 1980
4199201 Bearing assembly with adjustable lock nut Apr. 22, 1980
4167220 System for lubricating the bearings of cutting rollers of a roller bit Sep. 11, 1979
4136748 Roller-type rock bit and bearing arrangement therefor Jan. 30, 1979
4129392 Rolling cutter arrangement Dec. 12, 1978
4084649 Rock bit Apr. 18, 1978
4012238 Method of finishing a steel article having a boronized and carburized case Mar. 15, 1977
4010985 Rotary drill bit Mar. 8, 1977
4000783 Conical boring tool Jan. 4, 1977
3982594 Eccentric stabilizer Sep. 28, 1976
3966274 Roller separator for bit bearings Jun. 29, 1976
3963282 Cantilevered roller separator for rock bit bearings Jun. 15, 1976
3944306 Rock bit bearing seal Mar. 16, 1976

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