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Class Information
Number: 175/327
Name: Boring or penetrating the earth > Bit or bit element
Description: Apparatus comprising (1) a tool having a cutter element or cutting edge which is disclosed as specifically adapted to mechanically contact and selectively cut, disintegrate or dislocate portions of masonry, stone, rock or earth formations to form or enlarge a hole or bore therein or (2) subcombinations of such a tool not otherwise classified.

Sub-classes under this class:

Class Number	Class Name	Patents
175/382	Adjustable cutter element	15
175/396	Axially parallel side wall with transverse cuttings retaining portion	7
175/385	Bit with leading portion (e.g., pilot) forming smaller diameter initial bore	105
175/402	Casing shoe type	29
175/403	Core forming type	77
175/379	Cutting edge self-renewable during operation	38
175/401	Cutting edges facing in opposite axial directions	17
175/381	Cutting edges relatively longitudinally movable during operation	21
175/397	Forked rotary nontracking	12
175/414	Impact or percussion type	73
175/328	Magnetized or with magnet	8
175/406	Noncutting portion forwardly of cutting portion (e.g., reamer)	93
175/398	Nonsymmetrical bit	67
175/412	Plural separable cutter elements	18
175/331	Rolling cutter bit or rolling cutter bit element	71
175/425	Specific or diverse material	100
175/421	Symmetrical forked rotary type (e.g., fishtail)	14
175/380	Unsupported abrading particle type (e.g., shot)	2
175/408	With bit guide or bore wall compacting device	90
175/393	With fluid conduit lining or element (e.g., slush tube)	234
175/394	With helical-conveying portion	178

Patents under this class:

Patent Number	Title Of Patent	Date Issued
7286959	Drill bit performance analysis tool	Oct. 23, 2007
7191853	Hole cleaning and/or forming tool	Mar. 20, 2007
6932170	Drilling head	Aug. 23, 2005
6789635	Drill bit for directional drilling in cobble formations	Sep. 14, 2004
6729420	Multi profile performance enhancing centric bit and method of bit design	May. 4, 2004
6634444	Drill bit for trenchless drilling	Oct. 21, 2003
6615934	PDC drill bit having cutting structure adapted to improve high speed drilling performance	Sep. 9, 2003
6585064	Polycrystalline diamond partially depleted of catalyzing material	Jul. 1, 2003
6392190	Automated hardfacing system	May. 21, 2002
6374916	Method and apparatus for stiffening an output shaft on a cutting tool assembly	Apr. 23, 2002
6124564	Hardfacing compositions and hardfacing coatings formed by pulsed plasma-transferred arc	Sep. 26, 2000
5839525	Directional drill bit	Nov. 24, 1998
5836407	Articulated tool for drilling oil, gas geothermal wells	Nov. 17, 1998
5404660	Mechanism for supporting an earthworking etc. tool	Apr. 11, 1995
4953640	Quick detach bit	Sep. 4, 1990
4854404	Bucket auger	Aug. 8, 1989
4496013	Prevention of cone seal failures in rock bits	Jan. 29, 1985
4406336	Drilling bit	Sep. 27, 1983