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Class Information
Number: 175/227
Name: Boring or penetrating the earth > With storage means for bit lubricant carried by bit or shaft
Description: Apparatus in which the tool, tool shaft or tool housing is provided with a means to retain and/or supply a friction reducing fluid or grease to the cutter or formation disintegrating member or a portion thereof (e.g., the bearings of a rolling cutter).

Sub-classes under this class:

Class Number Class Name Patents
175/229 Rotation of bit actuates lubricant feed means 23
175/228 With fluid pressure-actuated feed means 121

Patents under this class:
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Patent Number Title Of Patent Date Issued
8579046 Pressure compensator for drill bit Nov. 12, 2013
8397838 Rotary roller reamer Mar. 19, 2013
8383559 Releasable corrosion inhibitors Feb. 26, 2013
7975782 Earth bit having a pressure relief valve Jul. 12, 2011
7708090 Excluder ring for earth-boring bit May. 4, 2010
7464773 Enhanced drill bit lubrication apparatus and method Dec. 16, 2008
7445062 Grease filling arrangement in a cutter for a boring head Nov. 4, 2008
7267183 Drill bit lubricant with enhanced load carrying/anti wear properties Sep. 11, 2007
7121365 Rock bit with grease composition utilizing polarized graphite Oct. 17, 2006
6698536 Roller cone drill bit having lubrication contamination detector and lubrication positive pressure maintenance system Mar. 2, 2004
6695079 Dual-seal drill bit pressure communication system Feb. 24, 2004
6679342 Dual-seal drill bit pressure communication system Jan. 20, 2004
6431293 Dual-seal drill bit pressure communication system Aug. 13, 2002
6405811 Solid lubricant for air cooled drill bit and method of drilling Jun. 18, 2002
6296067 Protected lubricant reservoir for sealed bearing earth boring drill bit Oct. 2, 2001
6206110 Protected lubricant reservoir with pressure control for sealed bearing earth boring drill bit Mar. 27, 2001
6196339 Dual-seal drill bit pressure communication system Mar. 6, 2001
6092611 Encapsulated elastomeric relief valve Jul. 25, 2000
6056072 Lubricating grease May. 2, 2000
5984024 Cutter, a stopper means and a method of preventing mud from entering into a cutter Nov. 16, 1999
5931241 Hydrostatic thrust face lubrication system Aug. 3, 1999
5891830 Lubricating grease Apr. 6, 1999
5791421 Optimal material pair for metal face seal in earth-boring bits Aug. 11, 1998
5668092 Rock bit grease composition Sep. 16, 1997
5628375 Thrust face lubrication system for a rolling cutter drill bit May. 13, 1997
5589443 Rock bit grease composition Dec. 31, 1996
5520257 Bit with ball plug compensator having pressure relief means May. 28, 1996
5477934 Lubricating mechanism and method for a rotary cutter Dec. 26, 1995
5439068 Modular rotary drill bit Aug. 8, 1995
5015401 Bearings grease for rock bit bearings May. 14, 1991
4981182 Sealed rotary blast hole drill bit utilizing air pressure for seal protection Jan. 1, 1991
4865136 Pressure relief valve for roller bit Sep. 12, 1989
4749053 Drill bit having a thrust bearing heat sink Jun. 7, 1988
4678045 Turbine tool Jul. 7, 1987
4591008 Lube reservoir protection for rock bits May. 27, 1986
4588309 Resilient bearing seal with ability to compensate for wear and compression set May. 13, 1986
4509607 Compressible pressure compensator within closed lubricant volume of an earth boring apparatus Apr. 9, 1985
4453604 Turbodrills Jun. 12, 1984
4410284 Composite floating element thrust bearing Oct. 18, 1983
4399878 Lubricating device Aug. 23, 1983
4398610 Roller reamer apparatus Aug. 16, 1983
4388973 Direct drill bit drive Jun. 21, 1983
4386667 Plunger lubricant compensator for an earth boring drill bit Jun. 7, 1983
4359111 Self compensating seal apparatus Nov. 16, 1982
4358384 Composite grease for rock bit bearings Nov. 9, 1982
4330158 Rotary rock bit with improved thrust flange May. 18, 1982
4287957 Cooling a drilling tool component with a separate flow stream of reduced-temperature gaseous drilling fluid Sep. 8, 1981
4284151 Lubricating device Aug. 18, 1981
4280571 Rock bit Jul. 28, 1981
4262759 Combination seal and pressure relief valve for sealed drill string unit Apr. 21, 1981

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