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Class Information
Number: 175/383
Name: Boring or penetrating the earth > Bit or bit element > Adjustable cutter element > Adjustment presents different cutting edge
Description: Apparatus in which the cutter element may be selectively held in different positions for the purpose of placing a different cutting edge in operative position for engaging the formation.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7293616 |
Expandable bit |
Nov. 13, 2007 |
| 7143847 |
Drilling apparatus |
Dec. 5, 2006 |
| 7131505 |
Drilling with concentric strings of casing |
Nov. 7, 2006 |
| 6131675 |
Combination mill and drill bit |
Oct. 17, 2000 |
| 5623978 |
Stump cutting double claw tooth structure |
Apr. 29, 1997 |
| 4889194 |
Method and a device for deep hole drilling |
Dec. 26, 1989 |
| 4858706 |
Diamond drill bit with hemispherically shaped diamond inserts |
Aug. 22, 1989 |
| 4654947 |
Drill bit and method of renewing drill bit cutting face |
Apr. 7, 1987 |
| 4527931 |
Indexable insert for mining drill |
Jul. 9, 1985 |
| 4355932 |
Indexable spade drill blade |
Oct. 26, 1982 |
| 4320925 |
Dredge cutterhead tooth |
Mar. 23, 1982 |
| 4298233 |
Milling tool for a rotating milling cylinder |
Nov. 3, 1981 |
| 4193638 |
Multiple tip cutting bit for rotary drum-type cutter |
Mar. 18, 1980 |
| 4100983 |
Boring device |
Jul. 18, 1978 |
| 4079796 |
Cutting machine and augering tool |
Mar. 21, 1978 |
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