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7367143 |
A cutter for working the soil includes a cutting frame, at least two cutting wheels that are supported on the cutting frame in a rotatably drivable manner about parallel axes of rotation, and an adjusting device, The adjusting device fun...
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7192094 |
An auger support assembly for use with an augering system for mining which bores a pair of side-by-side holes through a coal seam using dual side-by-side augers. Each auger includes a drilling section which is followed by a series of aug...
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7120565 |
The present invention aims to provide apparatus and method for determining non-circular figure to drill boring holes having a regular N-polygonal cross sections while retaining the advantage of the turning operation. For boring a boring ...
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6679559 |
An auger flight support for use with an augering systems for mining which bores a pair of side-by-side holes through the coal seam using respective augers. Each auger includes a drilling section which is followed by a series of auger fli...
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6588515 |
The invention provides a rock drilling bit with a plurality of cutting teeth raked into the cut of the drilling bit. Such teeth are oriented at an angle of at least about 30 degrees relative to an imaginary line normal to a front surface...
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5964305 |
A trench wall cutter with a drive mechanism which is attached to the cutting frame in a position which is spaced away from the bearing shield with a gear for driving at least one cutting wheel is provided. Between the drive mechanism and...
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5937954 |
In a method for directional drilling with the aid of a drilling device having a drill pipe and a mining tool which moves on an orbit, the tool moves at an essentially constant angular velocity during straight drilling and the angular vel...
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5190407 |
A rectangular shield excavating machine comprises a quadrangularly tubular shield body having a space for receiving an excavated matter at the front end, a rotor disposed in the space so as to be capable of being rotated onward and backw...
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4844549 |
A milling machine for digging trenches in the earth, of the type comprising at least one substantially vertical support plate on both sides of which two milling drums are mounted for rotation about an axis substantially perpendicular to ...
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4834197 |
A trench cutter has cutting wheels with radially projecting cutting teeth and is arranged on a bearing bracket. Along the bearing bracket, hinged teeth are arranged on one edge of the cutting wheel hub. The hinged teeth have two arms, on...
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4824176 |
A milling engine for cutting trenches in ground or soil provided with at least one vertical support plate on both sides of which milling drums are supported for rotation about an axis perpendicular to said plate. One or more movable fing...
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4694915 |
A slotted wall milling cutter for producing a slotted wall in the ground has a drive motor fixed to the cutter frame and a gear means positioned between the drive motor and two cutting wheel gears and which is partly arranged in recesses...
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4629010 |
A device and process for sinking vertical wells. A pair of rotary digging heads have horizontal axes mounted on supports for movement of such axes towards and away from each other between a central position close to the axis of a well an...
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4486050 |
A machine for boring a tunnel having an end face wall, a roof wall, a bottom wall, and opposite side walls. The machine comprises a rotatable cutting wheel means having an annular peripheral wall supporting a plurality of cutting devices...
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4400036 |
A mining assembly includes a primary rotary cutter mounted on one end of a support shaft and four secondary rotary cutters carried on the same support shaft and positioned behind the primary cutters for cutting corners in the hole cut by...
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4391472 |
A core eliminator for mining, road working or earth moving machinery in which a bit carrying mounting means is movably secured to a driven element. Means are associated with the driven element and the movable mounting means so as to guid...
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4205881 |
A machine for mining hard material in-situ between adjacent auger holes is disclosed which is suitable for being drivingly connected to a conventional mining apparatus, particularly an auger mining apparatus. The mining machine includes ...
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4143919 |
A mining machine comprises two cutting units each including a rotatable cutting head having cutting faces directed forwardly and rearwardly with respect to the direction of movement of the machine, and an elongated housing incorporating ...
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4082362 |
Apparatus for forming bores and coal seams and the like and enlarging preexisting bores. A mining machine includes a nonrotatable body member, a conveyor in line with the body member, a pilot head, and a pair of wing cutters mounted to t...
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4074778 |
A square hole drill having a cutterhead configuration whose outline is in the form of a Reuleaux triangle and which also has a planetary gear drive. Two counter revolving motions are present in the drill at the same time. One is the pure...
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4071100 |
In a method of making holes of selective external configuration in a rock or earth formation, two or more rotatable drills provided with drill crowns are driven into the ground. The drill crowns are so arranged that they will touch each ...
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4059163 |
A drilling apparatus comprises a support structure adapted to be moved on rails to position a drilling assembly mounted thereon adjacent to a selected drilling site. The drilling assembly includes a carriage movably mounted on the suppor...
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4036529 |
In an auger mining system which forms an opening in the earth comprising a pair of axially aligned cylindrical holes and wherein the opening has a bottom, the system has a pair of side-by-side conveyors. Each auger conveyor has a shaft a...
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4035024 |
A hard rock trench cutting machine includes a main body assembly, a cutter wheel assembly, and a longitudinal thrust assembly. The main body assembly includes two longitudinally extending cantilever support booms each having a forward po...
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4025119 |
A method of strip mining in which a plurality of vertical shafts of square cross section are formed closely adjacent to one another with each shaft extending through overburden and a layer of valuable material such as coal. As spoil is r...
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4015674 |
Apparatus for unitizing a pair of side-by-side augers when each auger includes a shaft, a mateable rotational coupling on each end of the shaft, and flightings along the shaft, the unitizing apparatus includes bearings which are journale...
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3983949 |
Auger apparatus, such as a coal mining machine, adapted to utilize one or more augers each formed of a string of auger sections, and comprising means for transferring auger sections into the string in the proper axial, transverse and rot...
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3965995 |
A cutter wheel is mounted at the lower end of the machine for rotation about a horizontal tubular support. Cuttings are picked up by buckets on the cutter wheel and are directed into the tubular support to be received by an endless bucke...
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3958832 |
A tool body defines an axis of rotation for the tool and has a periphery surrounding said axis. A plurality of cutter bits are carried by said body and protrude substantially radially from said periphery and have free ends. Said cutter b...
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3957305 |
The invention is directed to a method of in situ extraction of a constituent of a rock formation, e.g., copper deposits or particular petroleum deposits as found in oil shale, and to a method of preparing the rock formation for in situ e...
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3912025 |
A multiple cutting head assembly for an earth auger machine such as for mining coal from an open pit. The multiple cutting head assembly has a plurality of rotatable cutting heads rigidly fixed to helically vaned head augers with paralle...
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3903624 |
A screw auger is operated at the bottom of an excavation for undercutting and dislodging the earth while shoring members are being inserted into the ground. The screw auger is associated with a conveyer system for removing the dislodged ...
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3894587 |
The invention concerns a drilling device having a plurality of rotary drilling members arranged to rotate about axes transverse to the drilling direction. Said drilling members are arranged in pairs mounted one on either side of and adja...
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3883177 |
In a preferred embodiment of the invention, there is provided a subterranean cavern excavated by conventional methods and with conventional support structures and floor, with vertically extending shafts extending downwardly thereto for t...
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3856357 |
A mining machine for the cutting and removal of coal from a coal seam comprising a plurality of rotary kerf cutting means, wherein the latter are utilized together with a surrounding "box" kerf cutter adapted to cut a rectangularly shape...
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3710878 |
An excavator is provided with a box type casing including a pair of rotary cutters mounted on the bottom portion of the casing; blades provided at the outer periphery of the cutters provide excavating action with soil so excavated being ...
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3663062 |
Auger apparatus, such as a coal mining machine, adapted to utilize one or more augers of a diameter falling in a wide range. Apparatus is disclosed embodying three augers in which two side augers are driven from a power source, and an in...
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3643998 |
To bore a noncircular hole a conventional tunneling machine is provided with two or more rotatable cutter wheels mounted at the rear of the machine and rotating about axes parallel, but offset relative to, the main boring head of the mac...
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3614161 |
A method and apparatus for the excavation of trenches, more especially for the subsequent construction of subterranean walls, diaphragms or bulkheads, of the type in which an excavating device is caused to advance along a main axis of ex...
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3612193 |
A drilling machine for forming a vertical hole having an oblong and somewhat rectangular horizontal cross section in the earth, comprising a supporting frame housing a driving means which drives a horizontally arranged auger which is sup...
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3596724 |
A cutting roller for use in rock-boring equipment and having two circumferentially extending parallel cutting ribs. Each rib is provided with a series of wear-resistant exchangeable inserts which protect the crown and flank surfaces of t...
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3593811 |
Drilling of large diameter holes in the earth devices accomplished by means of a plurality of small drilling devices which move along a traversing bar to drill a number of small contiguous holes, said bar being rotatable about an anchore...
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3524510 |
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3509949 |
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3473243 |
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3459453 |
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3459452 |
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3459169 |
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3407006 |
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3406767 |
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