| |
 |
|
Class Information
Number: 175/395
Name: Boring or penetrating the earth > Bit or bit element > With helical-conveying portion > Impact type
Description: Apparatus in which the cutting edge of the bit is of the type which is adapted to disintegrate the formation by percussive action.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7309195 |
Shank for a rotary and/or percussive tool |
Dec. 18, 2007 |
| 7261169 |
Shank for a rotary/percussion tool |
Aug. 28, 2007 |
| 7231992 |
Drill bit |
Jun. 19, 2007 |
| 7225890 |
Cutting plate for a drill bit |
Jun. 5, 2007 |
| 7185721 |
Male portion, drill bit and threaded joint for percussive rock drilling |
Mar. 6, 2007 |
| 7114584 |
Hollow auger head assembly |
Oct. 3, 2006 |
| 7090038 |
Bedrock drilling and excavating apparatus |
Aug. 15, 2006 |
| 7028790 |
Rotary drill bit |
Apr. 18, 2006 |
| 6564887 |
Core drill |
May. 20, 2003 |
| 6328506 |
Masonry drill bit |
Dec. 11, 2001 |
| 6102634 |
Masonry drill bit |
Aug. 15, 2000 |
| 5984596 |
Insertable tool and tool holder for drilling and/or impacting electric machines |
Nov. 16, 1999 |
| 5779403 |
Percussive blow assisted rotary drill |
Jul. 14, 1998 |
| 5553682 |
Rock drill |
Sep. 10, 1996 |
| 5382121 |
Drill bit for use in concrete and asphalt |
Jan. 17, 1995 |
| 5113626 |
Earth anchor apparatus having improved load bearing element |
May. 19, 1992 |
| 4924953 |
Rock drill |
May. 15, 1990 |
| 4696355 |
Drilling tools |
Sep. 29, 1987 |
| 4579180 |
Drilling bit |
Apr. 1, 1986 |
| 4548281 |
Apparatus and method for installing well casings in the ground employing resonant sonic energy in conjunction with hydraulic pulsating jet action |
Oct. 22, 1985 |
| 4286677 |
Helical impact bit for drilling stone with narrow guide lips |
Sep. 1, 1981 |
| 4262762 |
Anti-collaring structure for impact bit |
Apr. 21, 1981 |
| 4202420 |
Rock drill with hard metal drilling head |
May. 13, 1980 |
| 4091884 |
Rotary air percussion bit |
May. 30, 1978 |
| 4047722 |
Hammer drilling devices |
Sep. 13, 1977 |
|
|
|
