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Class Information
Number: 175/419
Name: Boring or penetrating the earth > Bit or bit element > Impact or percussion type > With internal-fluid passage > 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
8127863 Drill bit having enhanced stabilization features and method of use thereof Mar. 6, 2012
7882908 Drill Feb. 8, 2011
7540341 Drill bit Jun. 2, 2009
7296641 Rock drill bit having outer and inner rock-crushing buttons Nov. 20, 2007
6845827 Rock drill head Jan. 25, 2005
5836408 Rotary percussion blow assisted drill Nov. 17, 1998
4722402 Electromagnetic drilling apparatus and method Feb. 2, 1988
4716976 Rotary percussion drill bit Jan. 5, 1988
4265325 Percussion rock bit May. 5, 1981
4185708 Bit for drilling holes in rocks Jan. 29, 1980
4026372 Drill bits May. 31, 1977











 
 
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