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Class Information
Number: 175/96
Name: Boring or penetrating the earth > With below-ground tool drive prime mover > Plural below-ground drive prime movers > Plural cutter elements driven by individual prime movers
Description: Apparatus wherein the tool is composed of a plurality of relatively movable cutting elements, each of said cutting elements being driven by a separate motor.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7363733 |
Device and method for making a trench wall in the soil |
Apr. 29, 2008 |
| 7363990 |
Cutting device and method for producing a cut hole |
Apr. 29, 2008 |
| 7290624 |
Method and device for drilling holes in soil or rock material |
Nov. 6, 2007 |
| 6981561 |
Downhole cutting mill |
Jan. 3, 2006 |
| 6467558 |
Multiple air hammer apparatus and excavating direction correcting method therefor |
Oct. 22, 2002 |
| 6439322 |
Downhole hammer-type core barrel and method of using same |
Aug. 27, 2002 |
| 6422328 |
Dual cutting mill |
Jul. 23, 2002 |
| 6189630 |
Downhole hammer-type core barrel |
Feb. 20, 2001 |
| 6179055 |
Conveying a tool along a non-vertical well |
Jan. 30, 2001 |
| 5954131 |
Method and apparatus for conveying a logging tool through an earth formation |
Sep. 21, 1999 |
| 5735358 |
Indexing percussive drilling bit |
Apr. 7, 1998 |
| 5174390 |
Modular cluster drill apparatus |
Dec. 29, 1992 |
| 5090487 |
Drill head with integral impact hammers |
Feb. 25, 1992 |
| 4883134 |
Milling machine for cutting trenches |
Nov. 28, 1989 |
| 4883133 |
Combustion operated drilling apparatus |
Nov. 28, 1989 |
| 4878547 |
Rock drilling apparatus |
Nov. 7, 1989 |
| 4844549 |
Milling machine for digging trenches in the earth |
Jul. 4, 1989 |
| 4824176 |
Milling engine for excavating trenches in the ground |
Apr. 25, 1989 |
| 4800967 |
Drilling machine for digging trenches in the ground |
Jan. 31, 1989 |
| 4796713 |
Activated earth drill |
Jan. 10, 1989 |
| 4732226 |
Drilling machine |
Mar. 22, 1988 |
| 4729439 |
Gang drill construction |
Mar. 8, 1988 |
| 4718504 |
Trench excavator |
Jan. 12, 1988 |
| 4694915 |
Slotted wall milling cutter |
Sep. 22, 1987 |
| 4682660 |
Hydro-drill with circular impression |
Jul. 28, 1987 |
| 4671367 |
Pole hole digger with percussive core drilling |
Jun. 9, 1987 |
| 4629010 |
Process and device for sinking wells |
Dec. 16, 1986 |
| 4550952 |
Mining machine with adjustable hood-scoop assembly |
Nov. 5, 1985 |
| 4410053 |
Apparatus for drilling hard material |
Oct. 18, 1983 |
| 4330155 |
Bore hole mining |
May. 18, 1982 |
| 4254994 |
Method of an apparatus for gaining access to an underground chamber |
Mar. 10, 1981 |
| 4186810 |
Fluid operated undercutter |
Feb. 5, 1980 |
| 4153121 |
Fluid operated undercutter |
May. 8, 1979 |
| 4133396 |
Drilling and casing landing apparatus and method |
Jan. 9, 1979 |
| 4133397 |
Drilling with multiple in-hole motors |
Jan. 9, 1979 |
| 4102415 |
Drilling device |
Jul. 25, 1978 |
| 4013319 |
Tunneling machine with massive guide for impact tools |
Mar. 22, 1977 |
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