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Class Information
Number: 175/403
Name: Boring or penetrating the earth > Bit or bit element > Core forming type
Description: Apparatus in which the cutter element or cutting edge of the bit is so arranged that the bit makes an annular cut in the formation and leaves a central undisturbed portion of the formation in the form of a cylinder.










Sub-classes under this class:

Class Number Class Name Patents
175/405 Impact or percussion type 36
175/405.1 Includes diamond 59
175/404 With core-breaking means 52


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8684111 Core drill bit Apr. 1, 2014
8668032 Core drill bit Mar. 11, 2014
8662208 Downhole cutting tool, cutting elements and method Mar. 4, 2014
8579049 Drilling system for enhanced coring and method Nov. 12, 2013
8485283 Drill bit Jul. 16, 2013
8485280 Core drilling tools with retractably lockable driven latch mechanisms Jul. 16, 2013
8479842 Garden auger Jul. 9, 2013
8459381 Drill bits with axially-tapered waterways Jun. 11, 2013
8365638 Tubular soil auger and manufacturing method Feb. 5, 2013
8336647 Sonic drill bits and sonic drilling systems Dec. 25, 2012
8230950 Multi-purpose scoop Jul. 31, 2012
8210287 Mining core drill bit and method of making thereof Jul. 3, 2012
8147142 Bearing assembly, and bearing apparatus and motor assembly using same Apr. 3, 2012
8051929 Core drill bits with enclosed fluid slots Nov. 8, 2011
8042613 Drilling head for reboring a stuck valve Oct. 25, 2011
8025466 Removable countersink bit Sep. 27, 2011
7984773 Sonic drill bit for core sampling Jul. 26, 2011
7958954 Drill bits with enclosed slots Jun. 14, 2011
7918288 Drill bits with enclosed fluid slots and method Apr. 5, 2011
7913775 Subsurface formation core acquisition system using high speed data and control telemetry Mar. 29, 2011
7909119 Drill bits with notches and enclosed slots Mar. 22, 2011
7900716 Vibratory unit for drilling systems Mar. 8, 2011
7901137 Bearing assembly, and bearing apparatus and motor assembly using same Mar. 8, 2011
7878271 Drill bit Feb. 1, 2011
7874384 Drill bits with increased crown height Jan. 25, 2011
7828090 Drill bits with enclosed fluid slots and internal flutes Nov. 9, 2010
7806204 Sonic drill rod with external surface features Oct. 5, 2010
7658242 Hole coring system with lever arm Feb. 9, 2010
7628228 Core drill bit with extended crown height Dec. 8, 2009
7624819 Universal joint assembly Dec. 1, 2009
7621352 Apparatus, system, and method for catching a core Nov. 24, 2009
7534076 Core bit May. 19, 2009
7484578 Hole coring system Feb. 3, 2009
7373994 Self cleaning coring bit May. 20, 2008
7341118 Rotating dry drilling bit Mar. 11, 2008
7341120 Blade edge structure for core drill Mar. 11, 2008
7234547 Apparatus and methods for sponge coring Jun. 26, 2007
7231991 Apparatus and methods for sponge coring Jun. 19, 2007
7219753 Tool holder for annular core bit May. 22, 2007
7131506 Flightless rock auger for use with pressure drills with quick attachment and method of use Nov. 7, 2006
7073797 Tool holder for annular core bit Jul. 11, 2006
7028790 Rotary drill bit Apr. 18, 2006
7021404 Method and device for deviated coring and/or drilling Apr. 4, 2006
7004265 Apparatus and methods for sponge coring Feb. 28, 2006
6959771 Abrasive and boring method using the same Nov. 1, 2005
6948574 Ultrasonic annular core bit Sep. 27, 2005
6945339 Core drill Sep. 20, 2005
6908264 Quick change drill bit Jun. 21, 2005
6814167 Boring device and boring method Nov. 9, 2004
6732818 Oriented core barrel system May. 11, 2004

1 2 3










 
 
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