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Class Information
Number: 175/397
Name: Boring or penetrating the earth > Bit or bit element > Forked rotary nontracking
Description: Apparatus comprising a rotary type bit having a plurality of axially extending cutter elements or cutting edges which elements or edges contact the bottom of the bore and are spaced radially different distances from the longitudinal axis of rotation so that as the bit is rotated a portion of a cutter element or cutting edge engages a portion of the bore bottom not engaged by any other cutter element or cutting edge.

Patents under this class:

Patent Number Title Of Patent Date Issued
8631883 Sectorial force balancing of drill bits Jan. 21, 2014
8127863 Drill bit having enhanced stabilization features and method of use thereof Mar. 6, 2012
7228922 Drill bit Jun. 12, 2007
6932170 Drilling head Aug. 23, 2005
6302224 Drag-bit drilling with multi-axial tooth inserts Oct. 16, 2001
6227317 Garden auger having wings and cutters May. 8, 2001
6202768 Rock drilling tool and reamer for percussive drilling Mar. 20, 2001
6123161 Rotary drill bits Sep. 26, 2000
6032750 Drilling tool having a drill bit with primary and secondary cutting edges Mar. 7, 2000
5687807 Cutter head for trenchless boring machine Nov. 18, 1997
5377773 Drill bit having combined positive and negative or neutral rake cutters Jan. 3, 1995
4981184 Diamond drag bit for soft formations Jan. 1, 1991
4554986 Rotary drill bit having drag cutting elements Nov. 26, 1985
3995706 Earth auger drill Dec. 7, 1976

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