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Class Information
Number: 175/420
Name: Boring or penetrating the earth > Bit or bit element > Impact or percussion type > Cruciform
Description: Apparatus comprising a plurality of cutting edges which lie in perpendicular planes intersecting at a line coinciding with the longitudinal axis of the bit.










Patents under this class:

Patent Number Title Of Patent Date Issued
8225889 Drill head for rock drills Jul. 24, 2012
8127863 Drill bit having enhanced stabilization features and method of use thereof Mar. 6, 2012
7950476 Drill bit and cutter element having chisel crest with protruding pilot portion May. 31, 2011
7891444 Drill bit Feb. 22, 2011
7882908 Drill Feb. 8, 2011
7861807 Drill bit including one piece cutting head Jan. 4, 2011
7540341 Drill bit Jun. 2, 2009
7497282 Drill bit having radially extending cutting bits on radial legs Mar. 3, 2009
7258180 Rotary hammerdrill bit Aug. 21, 2007
7225890 Cutting plate for a drill bit Jun. 5, 2007
7040416 T-post hole-forming device and use for installing a T-post May. 9, 2006
6976549 Drilling tool Dec. 20, 2005
6799648 Method of producing downhole drill bits with integral carbide studs Oct. 5, 2004
6588519 Head for a rock drill Jul. 8, 2003
6283232 Rock drill Sep. 4, 2001
6161633 Apparatus for boring through a solid material Dec. 19, 2000
5836410 Percussive blow assisted rotary drill Nov. 17, 1998
5685769 Tool component Nov. 11, 1997
4903787 Rock drill Feb. 27, 1990
4531592 Jet nozzle Jul. 30, 1985











 
 
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