| |
 |
|
Class Information
Number: 175/401
Name: Boring or penetrating the earth > Bit or bit element > Cutting edges facing in opposite axial directions
Description: Apparatus in which the bit is provided with longitudinally spaced cutting edges, the cutting edges at one spacing facing in one axial direction and the cutting edges at a different spacing facing in the opposite axial direction of the bit.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7255182 |
Ground drilling tool |
Aug. 14, 2007 |
| 6976549 |
Drilling tool |
Dec. 20, 2005 |
| 6843334 |
Drilling head of a rock drill |
Jan. 18, 2005 |
| 6634444 |
Drill bit for trenchless drilling |
Oct. 21, 2003 |
| 6494275 |
Rock drill bit having retrac teeth and method for its manufacturing |
Dec. 17, 2002 |
| 6321862 |
Rotary drill bits for directional drilling employing tandem gage pad arrangement with cutting elements and up-drill capability |
Nov. 27, 2001 |
| 6213231 |
Boring tool with rectangular plates |
Apr. 10, 2001 |
| 6116357 |
Rock drill bit with back-reaming protection |
Sep. 12, 2000 |
| 5868212 |
Stabiliser tool |
Feb. 9, 1999 |
| 5810102 |
Reversible bit assembly |
Sep. 22, 1998 |
| 5743345 |
Drill bit for reverse drilling |
Apr. 28, 1998 |
| 5655612 |
Earth-boring bit with shear cutting gage |
Aug. 12, 1997 |
| 5467836 |
Fixed cutter bit with shear cutting gage |
Nov. 21, 1995 |
| 5415243 |
Rock bit borhole back reaming method |
May. 16, 1995 |
| 4986375 |
Device for facilitating drill bit retrieval |
Jan. 22, 1991 |
| 4953642 |
Rock drill bit |
Sep. 4, 1990 |
| 4262762 |
Anti-collaring structure for impact bit |
Apr. 21, 1981 |
|
|
|
