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Class Information
Number: 175/418
Name: Boring or penetrating the earth > Bit or bit element > Impact or percussion type > With internal-fluid passage > Plural openings
Description: Apparatus in which the passage has a plurality of inlet or exhaust ports.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7581602 |
Downhole hammer drill |
Sep. 1, 2009 |
| 7467674 |
Rock drilling equipment |
Dec. 23, 2008 |
| 7455126 |
Percussive drill bit, drilling system comprising such a drill bit and method of drilling a bore hole |
Nov. 25, 2008 |
| 7410013 |
Boring and drilling apparatus |
Aug. 12, 2008 |
| 7377338 |
Downhole percussion tool |
May. 27, 2008 |
| 7296641 |
Rock drill bit having outer and inner rock-crushing buttons |
Nov. 20, 2007 |
| 7207402 |
Percussion drill bit and a regrindable cemented carbide button therefor |
Apr. 24, 2007 |
| 7168511 |
Rotary drill bit having cutting insert with a notch |
Jan. 30, 2007 |
| 7163070 |
Drill head |
Jan. 16, 2007 |
| 7070010 |
Drill bit |
Jul. 4, 2006 |
| 7011156 |
Percussion tool and method |
Mar. 14, 2006 |
| 6915867 |
Earth penetrating rotary drill bit with helical ports |
Jul. 12, 2005 |
| 6886645 |
Liquid seal for wet roof bit |
May. 3, 2005 |
| 6595305 |
Drill bit, hard member, and bit body |
Jul. 22, 2003 |
| 6543557 |
Drill hammer assembly |
Apr. 8, 2003 |
| 6467558 |
Multiple air hammer apparatus and excavating direction correcting method therefor |
Oct. 22, 2002 |
| 6315064 |
Rotatable cutting bit assembly with cutting inserts |
Nov. 13, 2001 |
| 6276467 |
Percussive rock drill bit with asymmetric wing |
Aug. 21, 2001 |
| 6253864 |
Percussive shearing drill bit |
Jul. 3, 2001 |
| 6189633 |
Drill |
Feb. 20, 2001 |
| 6105693 |
Partially enhanced percussive drill bit |
Aug. 22, 2000 |
| 6065908 |
Drill |
May. 23, 2000 |
| 6035953 |
Down hole hammer assembly |
Mar. 14, 2000 |
| 5996714 |
Rotatable cutting bit assembly with wedge-lock retention assembly |
Dec. 7, 1999 |
| 5890551 |
Rock drilling tool including a drill bit having a recess in a front surface thereof |
Apr. 6, 1999 |
| 5823274 |
Drill rod |
Oct. 20, 1998 |
| 5794728 |
Percussion rock drill bit |
Aug. 18, 1998 |
| 5590725 |
Drilling column with sledgehammer drilling head |
Jan. 7, 1997 |
| 5494119 |
Core sampling device |
Feb. 27, 1996 |
| 5407021 |
Down-the-hole hammer drill having reverse circulation |
Apr. 18, 1995 |
| 5377770 |
Apparatus for improving impact tool lubrication |
Jan. 3, 1995 |
| 5366032 |
Rock bit |
Nov. 22, 1994 |
| 5291957 |
Method and apparatus for jet cutting |
Mar. 8, 1994 |
| 5199512 |
Method of an apparatus for jet cutting |
Apr. 6, 1993 |
| 5139099 |
Excavation tool |
Aug. 18, 1992 |
| 5085285 |
Compensating ring for a down hole hammer |
Feb. 4, 1992 |
| 5038874 |
Drill bit having a flushing medium channel |
Aug. 13, 1991 |
| 5025875 |
Rock bit for a down-the-hole drill |
Jun. 25, 1991 |
| 4911729 |
Overburden eliminator rock drill bit |
Mar. 27, 1990 |
| 4852672 |
Drill apparatus having a primary drill and a pilot drill |
Aug. 1, 1989 |
| 4819746 |
Reverse circulation down-the-hole hammer drill and bit therefor |
Apr. 11, 1989 |
| 4805705 |
Drill bit |
Feb. 21, 1989 |
| 4723612 |
Bit, nozzle, cutter combination |
Feb. 9, 1988 |
| 4716976 |
Rotary percussion drill bit |
Jan. 5, 1988 |
| 4712626 |
Retainer device for drill bit |
Dec. 15, 1987 |
| 4711312 |
Drill bit |
Dec. 8, 1987 |
| 4697654 |
Rotary drill bits |
Oct. 6, 1987 |
| 4633959 |
Drill having means for locating cutting bit in a bit holder |
Jan. 6, 1987 |
| 4605079 |
Drill bit |
Aug. 12, 1986 |
| 4535853 |
Drill bit for jet assisted rotary drilling |
Aug. 20, 1985 |
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