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Class Information
Number: 175/384
Name: Boring or penetrating the earth > Bit or bit element > Adjustable cutter element > Radially adjustable
Description: Apparatus in which the cutter element is adapted to be selectively held in different positions for the purpose of increasing the circular outline of the cutting edge as the bit is rotated.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7293616 |
Expandable bit |
Nov. 13, 2007 |
| 7152702 |
Modular system for a back reamer and method |
Dec. 26, 2006 |
| 7124843 |
Bit assembly for a hammering drill |
Oct. 24, 2006 |
| 6745858 |
Adjustable earth boring device |
Jun. 8, 2004 |
| 6131675 |
Combination mill and drill bit |
Oct. 17, 2000 |
| 5560440 |
Bit for subterranean drilling fabricated from separately-formed major components |
Oct. 1, 1996 |
| 5361859 |
Expandable gage bit for drilling and method of drilling |
Nov. 8, 1994 |
| 5308150 |
Down reaming apparatus |
May. 3, 1994 |
| 5234064 |
Roller cutter assembly having adjustable ring cutter spacing |
Aug. 10, 1993 |
| 5139099 |
Excavation tool |
Aug. 18, 1992 |
| 5111893 |
Device for drilling in and/or lining holes in earth |
May. 12, 1992 |
| 5009274 |
Laterally adjustable drilling tool |
Apr. 23, 1991 |
| 4819744 |
Funnel hole ice auger |
Apr. 11, 1989 |
| 4531596 |
Tool for boring an enlarged portion within the interior of a hole and a tiltable tool for completing that tool |
Jul. 30, 1985 |
| 4456082 |
Expandable rock bit |
Jun. 26, 1984 |
| 4448270 |
Variable diameter earth boring bit |
May. 15, 1984 |
| 4264246 |
Boring tool for boring holes of substantial length |
Apr. 28, 1981 |
| 4142598 |
Two stage large diameter drill bit |
Mar. 6, 1979 |
| 4133399 |
Boring device |
Jan. 9, 1979 |
| 4100983 |
Boring device |
Jul. 18, 1978 |
| 4071098 |
Cutter mounting extension apparatus |
Jan. 31, 1978 |
| 4049067 |
Cutter mounting extension apparatus |
Sep. 20, 1977 |
| 4010808 |
Expandable raise bit |
Mar. 8, 1977 |
| 3989115 |
Adjustable gage cutter scraper for tunneling machines |
Nov. 2, 1976 |
| 3960218 |
Grass-clearing device for lawn-sprinkler heads |
Jun. 1, 1976 |
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