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Class Information
Number: 175/414
Name: Boring or penetrating the earth > Bit or bit element > Impact or percussion type
Description: Apparatus in which the cutting edge of the bit is of the type which is adapted to disintegrate the formation by a forceful contact or a repetitive striking action.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5090500 |
Replaceable wear sleeve for percussion drill |
Feb. 25, 1992 |
| 5065827 |
Hammer bit retention tool |
Nov. 19, 1991 |
| 5028092 |
Impact kerfing rock cutter and method |
Jul. 2, 1991 |
| 4997050 |
Scabbler bits |
Mar. 5, 1991 |
| 4932129 |
Casing punch for wells |
Jun. 12, 1990 |
| 4883133 |
Combustion operated drilling apparatus |
Nov. 28, 1989 |
| 4844186 |
Replaceable well drill bit |
Jul. 4, 1989 |
| 4811801 |
Rock bits and inserts therefor |
Mar. 14, 1989 |
| 4783123 |
Tool bit for impact ripping of a mine face |
Nov. 8, 1988 |
| 4762188 |
Drill bit |
Aug. 9, 1988 |
| 4745983 |
Bit seat protector device for drilling systems or the like |
May. 24, 1988 |
| 4729441 |
Rock drill |
Mar. 8, 1988 |
| 4696355 |
Drilling tools |
Sep. 29, 1987 |
| 4694918 |
Rock bit with diamond tip inserts |
Sep. 22, 1987 |
| 4690226 |
Hammer drill |
Sep. 1, 1987 |
| 4619334 |
Joint device in extension drill equipment for percussive drilling |
Oct. 28, 1986 |
| 4565472 |
Drill for hand-held drilling devices |
Jan. 21, 1986 |
| 4508181 |
Driving head for pneumatic pile drivers |
Apr. 2, 1985 |
| 4474488 |
Retainer system for roof-mine tool bit |
Oct. 2, 1984 |
| 4350348 |
Sealing of telescopically related elements |
Sep. 21, 1982 |
| 4190127 |
Brazing inserts |
Feb. 26, 1980 |
| 4043409 |
Drill steel for deep drill hammers |
Aug. 23, 1977 |
| 4007795 |
Attachment for a rotary-hammer tool |
Feb. 15, 1977 |
| 3995707 |
Well drilling bit |
Dec. 7, 1976 |
| 3987857 |
Side cutting device for earth boring procedures |
Oct. 26, 1976 |
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