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Class Information
Number: 175/263
Name: Boring or penetrating the earth > Cutter element laterally shiftable below ground (e.g., expansible)
Description: Apparatus comprising a cutter element carried on a shaft or bit head by means which permits or causes the cutter element to move relative to the shaft or bit head in a direction transverse to the bore axis while the shaft or bit head and cutter element are below ground.










Sub-classes under this class:

Class Number Class Name Patents
175/273 Cutter element shifted by cam or gear axially rotatable relative to shaft 33
175/270 Cutter element shifted by dropped element 3
175/267 Cutter element shifted by fluid pressure 95
175/284 Cutter element shifted by longitudinally relatively movable parts 36
175/272 Cutter element shifted by relatively longitudinally movable threaded elements 12
175/292 Pivoted about substantially longitudinal axis 45
175/265 Plural cutter elements longitudinally relative movable into transverse alignment 26
175/266 Plural selectively shiftable cutter elements 25
175/291 Spring biased 18
175/271 With latch operated by fluid pressure or dropped element 10
175/290 With latch 4
175/264 With separable means holding tool collapsed above ground only 1
175/274 With shifting mechanism spring biased to operative position 9


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8657038 Expandable reamer apparatus including stabilizers Feb. 25, 2014
8613331 On demand actuation system Dec. 24, 2013
8590615 Casing device Nov. 26, 2013
8567530 Collapsible rock head and associated structure Oct. 29, 2013
8511404 Drilling tool, apparatus and method for underreaming and simultaneously monitoring and controlling wellbore diameter Aug. 20, 2013
8464810 Method of modifying drilling pattern, rock drilling rig, and software product Jun. 18, 2013
8371389 Differential shifting tool and method of shifting Feb. 12, 2013
8365842 Ratchet mechanism in a fluid actuated device Feb. 5, 2013
8360173 Positive engagement underreamer and method Jan. 29, 2013
8297381 Stabilizer subs for use with expandable reamer apparatus, expandable reamer apparatus including stabilizer subs and related methods Oct. 30, 2012
8235144 Expansion and sensing tool Aug. 7, 2012
8172009 Expandable tool with at least one blade that locks in place through a wedging effect May. 8, 2012
8112911 Method and device for mixing earth in situ for the formation of underground walls or diaphragms Feb. 14, 2012
8066085 Stochastic bit noise control Nov. 29, 2011
7963348 Expandable earth boring apparatus using impregnated and matrix materials for enlarging a borehole Jun. 21, 2011
7954564 Placement of cutting elements on secondary cutting structures of drilling tool assemblies Jun. 7, 2011
7757784 Drilling methods utilizing independently deployable multiple tubular strings Jul. 20, 2010
7757787 Drilling and hole enlargement device Jul. 20, 2010
7699120 On demand actuation system Apr. 20, 2010
7681667 Drilling apparatus Mar. 23, 2010
7681671 Drilling apparatus having in-line extending wings and driving method thereof Mar. 23, 2010
7597158 Drilling and hole enlargement device Oct. 6, 2009
7591329 Auger with a movable gouge for making a borehole Sep. 22, 2009
7575050 Method and apparatus for a downhole excavation in a wellbore Aug. 18, 2009
7506703 Drilling and hole enlargement device Mar. 24, 2009
7451836 Advanced expandable reaming tool Nov. 18, 2008
7451837 Advanced expandable reaming tool Nov. 18, 2008
7410015 Expandable drill bit Aug. 12, 2008
7343988 Drilling apparatus Mar. 18, 2008
7195085 Drill bit Mar. 27, 2007
7182157 Enlarging well bores having tubing therein Feb. 27, 2007
7143847 Drilling apparatus Dec. 5, 2006
7004264 Bore lining and drilling Feb. 28, 2006
7004684 Method for construction of piers in soil and a pier construction Feb. 28, 2006
6976547 Actuator underreamer Dec. 20, 2005
6962216 Wedge activated underreamer Nov. 8, 2005
6896077 Rotary driven pipe-bursting tool May. 24, 2005
6880650 Advanced expandable reaming tool Apr. 19, 2005
6070677 Method and apparatus for enhancing production from a wellbore hole Jun. 6, 2000
5494121 Cavern well completion method and apparatus Feb. 27, 1996
5439330 Anchor and method and system for securing same Aug. 8, 1995
5402856 Anti-whirl underreamer Apr. 4, 1995
5242017 Cutter blades for rotary tubing tools Sep. 7, 1993
5181577 Device for fixing disk cutter to tunnel excavator Jan. 26, 1993
5174374 Clean-out tool cutting blade Dec. 29, 1992
5148875 Method and apparatus for horizontal drilling Sep. 22, 1992
5036928 Device for drilling an undercut in a borehole Aug. 6, 1991
4915181 Tubing bit opener Apr. 10, 1990
4768599 Drill bit for undercutting a blind bore Sep. 6, 1988
4616720 Divided-bucket type rotary excavator Oct. 14, 1986

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