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Class Information
Number: 175/285
Name: Boring or penetrating the earth > Cutter element laterally shiftable below ground (e.g., expansible) > Cutter element shifted by longitudinally relatively movable parts > Toggle or linkage between movable parts
Description: Apparatus in which the laterally movable cutter element is moved by a link or element which is pivotally connected to the cutter element and one of the relatively longitudinally movable parts.










Patents under this class:

Patent Number Title Of Patent Date Issued
8496410 Method and apparatus for penetrating particulate substrates Jul. 30, 2013
8439131 Drill bit assembly and method of performing an operation in a wellbore May. 14, 2013
8230951 Earth-boring tools having expandable members and methods of making and using such earth-boring tools Jul. 31, 2012
8186458 Expandable window milling bit and methods of milling a window in casing May. 29, 2012
8066085 Stochastic bit noise control Nov. 29, 2011
8028767 Expandable stabilizer with roller reamer elements Oct. 4, 2011
7975783 Reaming and stabilization tool and method for its use in a borehole Jul. 12, 2011
7900717 Expandable reamers for earth boring applications Mar. 8, 2011
7891441 Expandable downhole tool Feb. 22, 2011
7584811 Reaming and stabilization tool and method for its use in a borehole Sep. 8, 2009
7401666 Reaming and stabilization tool and method for its use in a borehole Jul. 22, 2008
7387175 Window reaming and coring apparatus and method of use Jun. 17, 2008
7350596 Methods and apparatus for expanding the diameter of a borehole Apr. 1, 2008
6668949 Underreamer and method of use Dec. 30, 2003
6644422 Pantograph underreamer Nov. 11, 2003
6575255 Pantograph underreamer Jun. 10, 2003
5853054 2-Stage underreamer Dec. 29, 1998
5325930 Overcenter toggle latch apparatus Jul. 5, 1994
4889197 Hydraulic operated underreamer Dec. 26, 1989
4819744 Funnel hole ice auger Apr. 11, 1989
4616720 Divided-bucket type rotary excavator Oct. 14, 1986
4614242 Bore hole enlarging arrangement and method Sep. 30, 1986
4604818 Under reaming pile bore excavating bucket and method of its excavation Aug. 12, 1986
4586573 Rotary expansion tool for reaming frustoconical undercuts in the walls of cylindrical holes May. 6, 1986
4550788 Roof bolt hole groover Nov. 5, 1985
4502554 Expansible tool for reaming frustoconical undercuts in cylindrical holes Mar. 5, 1985
4488606 Method of excavating an under-reamed pile bore Dec. 18, 1984
4436167 Method of excavating a pile hole and an apparatus therefor Mar. 13, 1984
4410055 Drilling tool Oct. 18, 1983
4406500 Cutting assembly including expanding wall segments of auger Sep. 27, 1983
4396076 Under-reaming pile bore excavator Aug. 2, 1983
4384624 Earth boring head May. 24, 1983
4323129 Hole digging apparatus and method Apr. 6, 1982
4189184 Rotary drilling and extracting process Feb. 19, 1980
4169510 Drilling and belling apparatus Oct. 2, 1979
4064951 Underreamer having cutter arm position indication Dec. 27, 1977
4023629 Toggle actuated underreamer May. 17, 1977











 
 
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