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Class Information
Number: 175/319
Name: Boring or penetrating the earth > Below-ground mechanical motion converting means relatively moving plural cutting edges
Description: Apparatus comprising a plurality of cutting edges and a mechanical linkage or gearing which is located below ground and which is connected to the cutting edges to cause the cutting edges to move relative to each other.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6209662 |
Method of and apparatus for controlling diamond drill feed |
Apr. 3, 2001 |
| 6082453 |
Orientation device, particularly for drilling tool or a well equipment |
Jul. 4, 2000 |
| 5404959 |
Drill rig safety shutdown device |
Apr. 11, 1995 |
| 4889194 |
Method and a device for deep hole drilling |
Dec. 26, 1989 |
| 4627501 |
Borer head with planetary gearing |
Dec. 9, 1986 |
| 4441761 |
Mining machine |
Apr. 10, 1984 |
| 4368787 |
Arrangement for removing borehole cuttings by reverse circulation with a downhole bit-powered pump |
Jan. 18, 1983 |
| 4289210 |
Impact drill bit actuator |
Sep. 15, 1981 |
| 4159149 |
Coal mining auger |
Jun. 26, 1979 |
| 4117897 |
Drill bit |
Oct. 3, 1978 |
| 3945445 |
Boring apparatus provided with drill bits freely rotatable around their own axis |
Mar. 23, 1976 |
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