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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 |
| 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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