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Class Information
Number: 175/291
Name: Boring or penetrating the earth > Cutter element laterally shiftable below ground (e.g., expansible) > Spring biased
Description: Apparatus in which the laterally movable cutter element is resiliently urged to move laterally of the shaft axis.

Patents under this class:

Patent Number Title Of Patent Date Issued
8668031 Drill bit and method for inserting, expanding, collapsing, and retrieving drill bit Mar. 11, 2014
8485282 Earth-boring tools having expandable cutting structures and methods of using such earth-boring tools Jul. 16, 2013
8347987 Apparatus and method for installing ground anchoring systems Jan. 8, 2013
7882905 Stabilizer and reamer system having extensible blades and bearing pads and method of using same Feb. 8, 2011
7686103 Drill bit with radially expandable cutter, and method of using same Mar. 30, 2010
7581591 Production casing ripper Sep. 1, 2009
7493971 Concentric expandable reamer and method Feb. 24, 2009
7195080 Expandable drilling tool and method Mar. 27, 2007
7048078 Expandable underreamer/stabilizer May. 23, 2006
6880649 Apparatus and method for directional drilling of holes Apr. 19, 2005
6732817 Expandable underreamer/stabilizer May. 11, 2004
6378632 Remotely operable hydraulic underreamer Apr. 30, 2002
6065551 Method and apparatus for rotary mining May. 23, 2000
5735359 Wellbore cutting tool Apr. 7, 1998
5368114 Under-reaming tool for boreholes Nov. 29, 1994
5111893 Device for drilling in and/or lining holes in earth May. 12, 1992
4549614 Drilling device Oct. 29, 1985
4444279 Drilling tool Apr. 24, 1984

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