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Class Information
Number: 175/353
Name: Boring or penetrating the earth > Bit or bit element > Rolling cutter bit or rolling cutter bit element > Laterally offset cutter axis > Cone or frustum rolling cutter
Description: Apparatus in which the rolling cutter element comprises an axially elongated roller which tapers in diameter along its axis.

Patents under this class:

Patent Number Title Of Patent Date Issued
RE42445 Cutting structure for earth-boring bit to reduce tracking Jun. 14, 2011
7647991 Cutting structure for earth-boring bit to reduce tracking Jan. 19, 2010
7549488 Two-cone drill bit with enhanced stability Jun. 23, 2009
7464773 Enhanced drill bit lubrication apparatus and method Dec. 16, 2008
7299887 Roller bit with a journal pin offset from the central axis thereof Nov. 27, 2007
7195085 Drill bit Mar. 27, 2007
6902014 Roller cone bi-center bit Jun. 7, 2005
6863138 High offset bits with super-abrasive cutters Mar. 8, 2005
6786288 Cutting structure for roller cone drill bits Sep. 7, 2004
6345673 High offset bits with super-abrasive cutters Feb. 12, 2002
6227314 Inclined leg earth-boring bit May. 8, 2001
6026916 Rotary drill arrangement Feb. 22, 2000
5996713 Rolling cutter bit with improved rotational stabilization Dec. 7, 1999
5979574 Horizontal boring apparatus and method of using the same Nov. 9, 1999
5695018 Earth-boring bit with negative offset and inverted gage cutting elements Dec. 9, 1997
5586612 Roller cone bit with positive and negative offset and smooth running configuration Dec. 24, 1996
5518077 Rotary drill bit with improved cutter and seal protection May. 21, 1996
5452771 Rotary drill bit with improved cutter and seal protection Sep. 26, 1995
RE34526 Two cone bit with non-opposite cones Feb. 1, 1994
5027913 Insert attack angle for roller cone rock bits Jul. 2, 1991
5016719 Rotary cone type rock bits May. 21, 1991
4967854 Double cone cutting head for a drill bit Nov. 6, 1990
4953641 Two cone bit with non-opposite cones Sep. 4, 1990
4936398 Rotary drilling device Jun. 26, 1990
4907664 Rock cutting tool Mar. 13, 1990
4763736 Asymmetrical rotary cone bit Aug. 16, 1988
4657093 Rolling cutter drill bit Apr. 14, 1987
4641718 Rotary drill bit Feb. 10, 1987
4611673 Drill bit having offset roller cutters and improved nozzles Sep. 16, 1986
4580642 Zero deviation drill bits Apr. 8, 1986
4231438 Straight hole insert drill bit Nov. 4, 1980
4154312 Drill bit with single cutting head May. 15, 1979
4102416 Stabilized conical boring tool Jul. 25, 1978
3946820 Novel cutter elements for drill bits Mar. 30, 1976

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