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Class Information
Number: 175/417
Name: Boring or penetrating the earth > Bit or bit element > Impact or percussion type > With internal-fluid passage
Description: Apparatus in which the bit is provided with a drilling fluid passage enclosed within the body of the bit and having an inlet or exhaust port opening to the outside of the bit.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7392857 |
Apparatus and method for vibrating a drill bit |
Jul. 1, 2008 |
| 7392863 |
Rock drill bit |
Jul. 1, 2008 |
| 7325633 |
Rock drill bit and a thread joint therefor |
Feb. 5, 2008 |
| 7290626 |
Transmission sleeve |
Nov. 6, 2007 |
| 7159676 |
Fluid distributor device for down-hole-drills |
Jan. 9, 2007 |
| 7143846 |
Method for drilling and drilling apparatus to enable reverse circulation |
Dec. 5, 2006 |
| 7128172 |
Drill string for upward drilling and components therefor |
Oct. 31, 2006 |
| 7055633 |
Concrete drill |
Jun. 6, 2006 |
| 7051822 |
Drill bit and drill tip having a tip-locating structure |
May. 30, 2006 |
| 7040421 |
Liquid driven downhole drilling machine |
May. 9, 2006 |
| 7004686 |
Rock bolts with expandable element |
Feb. 28, 2006 |
| 6971458 |
Drill bit |
Dec. 6, 2005 |
| 6886645 |
Liquid seal for wet roof bit |
May. 3, 2005 |
| 6712163 |
Rock drilling tool |
Mar. 30, 2004 |
| 6702045 |
Drilling apparatus |
Mar. 9, 2004 |
| 6502650 |
Percussive down-the-hole hammer for rock drilling, and a drill bit used therein |
Jan. 7, 2003 |
| 6454026 |
Percussive down-the-hole hammer for rock drilling, a top sub used therein and a method for adjusting air pressure |
Sep. 24, 2002 |
| 6435288 |
Rock drill bit |
Aug. 20, 2002 |
| 6431294 |
Percussive tool |
Aug. 13, 2002 |
| 6405723 |
Suction tool |
Jun. 18, 2002 |
| 6397956 |
Directional drilling tool |
Jun. 4, 2002 |
| 6138775 |
Boring machine |
Oct. 31, 2000 |
| 6125952 |
Percussive down-the-hole hammer and a drill bit therefor |
Oct. 3, 2000 |
| 6109377 |
Rotatable cutting bit assembly with cutting inserts |
Aug. 29, 2000 |
| 6102141 |
Rock drill having an internal flushing channel |
Aug. 15, 2000 |
| 6095266 |
Drill rod and method for its manufacturer |
Aug. 1, 2000 |
| 6092612 |
Rotary drilling systems |
Jul. 25, 2000 |
| 6044920 |
Rotatable cutting bit assembly with cutting inserts |
Apr. 4, 2000 |
| 6044919 |
Rotary spade drill arrangement |
Apr. 4, 2000 |
| 5947215 |
Diamond enhanced rock drill bit for percussive drilling |
Sep. 7, 1999 |
| 5927411 |
Connector with variable resistance retention member |
Jul. 27, 1999 |
| 5878634 |
Earth boring drill bit with shell supporting an external drilling surface |
Mar. 9, 1999 |
| 5873579 |
Protective device for a fluid-operated percussion tool |
Feb. 23, 1999 |
| 5833017 |
Cutting bit assembly for impinging an earth strata |
Nov. 10, 1998 |
| 5722495 |
Make up system of a down-the-hole hammer |
Mar. 3, 1998 |
| 5699867 |
Bit retention device for a bit and chuck assembly of a down-the-hole, percussive drill |
Dec. 23, 1997 |
| 5666864 |
Earth boring drill bit with shell supporting an external drilling surface |
Sep. 16, 1997 |
| 5645132 |
Drill bit having springless check valve and method of blocking backflow during drilling |
Jul. 8, 1997 |
| 5445232 |
Hydraulic breaking hammer |
Aug. 29, 1995 |
| 5441121 |
Earth boring drill bit with shell supporting an external drilling surface |
Aug. 15, 1995 |
| 5435401 |
Down-the-hole rock drill |
Jul. 25, 1995 |
| 5390749 |
Apparatus for positioning a split retaining ring in a down-hole percussive drill |
Feb. 21, 1995 |
| 5363932 |
PDC drag bit with improved hydraulics |
Nov. 15, 1994 |
| 5358063 |
Drill bit |
Oct. 25, 1994 |
| 5207283 |
Reversible bit bearing |
May. 4, 1993 |
| 5150636 |
Rock drill bit and method of making same |
Sep. 29, 1992 |
| 5044451 |
Device for forming an undercut in a drilled hole |
Sep. 3, 1991 |
| 5033560 |
Drill bit with decreasing diameter cutters |
Jul. 23, 1991 |
| 5029657 |
Rock drill bit |
Jul. 9, 1991 |
| 5005656 |
Device in impact machines |
Apr. 9, 1991 |
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