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Class Information
Number: 175/372
Name: Boring or penetrating the earth > Bit or bit element > Rolling cutter bit or rolling cutter bit element > With bearing or seal details > Antifriction type
Description: Apparatus in which the bearing is an antifriction bearing employing rolling elements.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8689907 Patterned texturing of the seal surface for a roller cone rock bit Apr. 8, 2014
8448723 Seal assembly for drill bit May. 28, 2013
8439134 Method and apparatus for a true geometry, durable rotating drill bit May. 14, 2013
8403079 Rock bit having a seal gland with a conical sealing surface Mar. 26, 2013
8393418 Rock bit having a seal gland with a conical sealing surface Mar. 12, 2013
8028770 Conformal bearing for rock drill bit Oct. 4, 2011
7992657 Earth bit having a wear ring Aug. 9, 2011
7971660 Rock bit with a thermal insulating seal ring positioned in the seal gland Jul. 5, 2011
7861805 Conformal bearing for rock drill bit Jan. 4, 2011
7832505 Rock bit with a thermal insulating seal ring positioned in the seal gland Nov. 16, 2010
7798254 Earth bit with hub and thrust units Sep. 21, 2010
7743854 Well jet device and the operating method thereof Jun. 29, 2010
7721827 Rock bit having a seal gland with a conical sealing surface May. 25, 2010
7559381 Surface textures for earth boring bits Jul. 14, 2009
7543660 Roller cone drill bit with debris diverter plugs Jun. 9, 2009
7465096 Earth boring bit with tilted hydrodynamic thrust bearing Dec. 16, 2008
7464773 Enhanced drill bit lubrication apparatus and method Dec. 16, 2008
7413037 Metal face seal for an earth-boring bit Aug. 19, 2008
7387177 Bearing insert sleeve for roller cone bit Jun. 17, 2008
7360612 Roller cone drill bits with optimized bearing structures Apr. 22, 2008
RE40197 Drill bit having an improved seal and lubrication method using same Apr. 1, 2008
7347290 Multi-part energizer for mechanical seal assembly Mar. 25, 2008
7237627 Bearing and lubrication system for earth boring bit Jul. 3, 2007
7234541 DLC coating for earth-boring bit seal ring Jun. 26, 2007
7117961 Dynamic seal with soft interface Oct. 10, 2006
7073611 Ion-beam assisted deposition of inorganic coatings for elastomeric seal wear resistance improvement Jul. 11, 2006
7013998 Drill bit having an improved seal and lubrication method using same Mar. 21, 2006
6802380 Pressure relief system and methods of use and making Oct. 12, 2004
6769500 Optimized earth boring seal means Aug. 3, 2004
6684966 PCD face seal for earth-boring bit Feb. 3, 2004
6679342 Dual-seal drill bit pressure communication system Jan. 20, 2004
6578647 Sealing structure for a rock drill bit Jun. 17, 2003
6536542 Rock bit seal with multiple dynamic seal surface elements Mar. 25, 2003
6460635 Load responsive hydrodynamic bearing Oct. 8, 2002
6450270 Rotary cone bit for cutting removal Sep. 17, 2002
6220374 Rotary cone drill bit with enhanced thrust bearing flange Apr. 24, 2001
6196339 Dual-seal drill bit pressure communication system Mar. 6, 2001
6176331 Bearing sealing means of earth boring bits Jan. 23, 2001
6056072 Lubricating grease May. 2, 2000
5842531 Rotary rock bit with infiltrated bearings Dec. 1, 1998
5794726 Rotary rock bit with infiltrated bearings Aug. 18, 1998
5673921 Slide ring and/or counterring made of two materials Oct. 7, 1997
5577565 Compact roller cutter Nov. 26, 1996
5520257 Bit with ball plug compensator having pressure relief means May. 28, 1996
5485891 Cone drill bit Jan. 23, 1996
5402858 O-ring seal for rock bit bearings Apr. 4, 1995
5251914 Sealing assembly for relatively movable members Oct. 12, 1993
5152353 High speed rock bit Oct. 6, 1992
5129471 Earth boring bit with protected seal means Jul. 14, 1992
5092412 Earth boring bit with recessed roller bearing Mar. 3, 1992

1 2 3










 
 
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