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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:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 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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