| |
 |
|
Class Information
Number: 175/389
Name: Boring or penetrating the earth > Bit or bit element > Bit with leading portion (e.g., pilot) forming smaller diameter initial bore > Impact type
Description: Apparatus in which the cutting edges of the bit are of the type which disintegrate the formation by percussive action.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7591327 |
Drilling at a resonant frequency |
Sep. 22, 2009 |
| 7464772 |
Downhole pressure pulse activated by jack element |
Dec. 16, 2008 |
| 6641332 |
Foundation support and process for structures |
Nov. 4, 2003 |
| 6640914 |
Percussion borer for forming bores in stone material |
Nov. 4, 2003 |
| 6394197 |
Reverse circulation drilling system with bit locked underreamer arms |
May. 28, 2002 |
| 6328506 |
Masonry drill bit |
Dec. 11, 2001 |
| 6241033 |
Drill string apparatus and method of extending the length of a drill string |
Jun. 5, 2001 |
| 6213230 |
Drilling tool especially for the rotary percussion drilling of preferably rock |
Apr. 10, 2001 |
| 6209665 |
Reverse circulation drilling system with bit locked underreamer arms |
Apr. 3, 2001 |
| 6202768 |
Rock drilling tool and reamer for percussive drilling |
Mar. 20, 2001 |
| 6102634 |
Masonry drill bit |
Aug. 15, 2000 |
| 5787999 |
Drill bit with set of underreamer arms |
Aug. 4, 1998 |
| 5779403 |
Percussive blow assisted rotary drill |
Jul. 14, 1998 |
| 5052503 |
Eccentric drilling tool |
Oct. 1, 1991 |
| 4852672 |
Drill apparatus having a primary drill and a pilot drill |
Aug. 1, 1989 |
| 4549615 |
Single-pass notching and drilling tool and method of drilling a blast role therewith |
Oct. 29, 1985 |
| 4440244 |
Drill tool |
Apr. 3, 1984 |
| 4361197 |
Blast hole grooving bit and wear resistant compact |
Nov. 30, 1982 |
| 4354561 |
Reciprocating drill bit |
Oct. 19, 1982 |
| 4294319 |
Cutter head for rotary percussion drills |
Oct. 13, 1981 |
| 3955631 |
Soil sampler |
May. 11, 1976 |
| 3952819 |
Fatigue resistant anvil bit for percussion rock drill |
Apr. 27, 1976 |
|
|
|
