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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
8616275 Groundwater evaluation tools and methods of groundwater evaluation Dec. 31, 2013
7410013 Boring and drilling apparatus Aug. 12, 2008
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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