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Class Information
Number: 175/229
Name: Boring or penetrating the earth > With storage means for bit lubricant carried by bit or shaft > Rotation of bit actuates lubricant feed means
Description: Apparatus in which the friction reducing fluid is supplied or fed to the cutter or portion thereof by means actuated by the rotation of the tool or the cutter.










Patents under this class:

Patent Number Title Of Patent Date Issued
8383559 Releasable corrosion inhibitors Feb. 26, 2013
8141662 Downhole lubrication system Mar. 27, 2012
7363734 Lubricated trench wall cutter with remote lubricant inlet port Apr. 29, 2008
6460635 Load responsive hydrodynamic bearing Oct. 8, 2002
5927439 Sub-assembly for lubricating rock drill bit Jul. 27, 1999
5628375 Thrust face lubrication system for a rolling cutter drill bit May. 13, 1997
5337843 Hole opener for the top hole section of oil/gas wells Aug. 16, 1994
5183123 Indicating means for a rock bit lubricating system Feb. 2, 1993
5099932 Rock drill bit lubricant circulating system Mar. 31, 1992
4765205 Method of assembling drill bits and product assembled thereby Aug. 23, 1988
4727943 Rotary drill bit Mar. 1, 1988
4657091 Drill bits with cone retention means Apr. 14, 1987
4501338 Grease pump for sealed bearing rotary cone rock bits Feb. 26, 1985
4452323 Valve assembly for drill bit lubrication system Jun. 5, 1984
4446933 Rotary earth boring drill bit with centrifugal lubrication system May. 8, 1984
4412590 Rock bit internal lubricant pump Nov. 1, 1983
4390072 Drill bit lubricant circulation system Jun. 28, 1983
4383577 Rotating head for air, gas and mud drilling May. 17, 1983
4381824 Drill bit lubrication system May. 3, 1983
4183416 Cutter actuated rock bit lubrication system Jan. 15, 1980
4181185 Thrust flange actuated rock bit lubrication system Jan. 1, 1980
4167220 System for lubricating the bearings of cutting rollers of a roller bit Sep. 11, 1979
4167219 Viscous pump rock bit lubrication system Sep. 11, 1979











 
 
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