Matches 101 - 150 out of 262 < 1 2 3 4 5 6 >
Match Document Document Title
4099785 Method and apparatus for supporting the roof of an underground mine working  
The roof of an underground mine working which is newly exposed by a mining machine passing along a face of the working is supported by applying a flexible mat to the roof and underpinning the mat...
4095845 Method of and apparatus for the mining of coal  
An excavating mining and conveying apparatus is formed of trough segments or sections with screw sections mounted on the trough sections carrying out the mining and conveying functions. Actuating...
4095655 Earth penetration  
A method and apparatus for applying lateral thrust for moving a member, especially for applying lateral thrust to an earth penetrating device. A tubular mandrel of fixed length has four generally...
4094157 Anchoring apparatus for anchoring a mining installation  
Apparatus for anchoring a mining installation to the floor of a mining excavation includes an anchor beam and at least one anchoring element which is anchored in a borehole in the floor of the...
4076087 Hole reamer  
A hole reamer according to the invention includes a main body or support with roller cutters rigidly connected to a drill stem, and an additional support with roller cutters arranged co-axially...
4067618 Apparatus for protecting of coal mine workers  
An apparatus for protecting coal mine workers from flying coal, rocks, coal dust, scattering coal and the like, which are produced as a drum shearer works in a longwall coal face. The apparatus is...
4048806 Apparatus for, and a method of, driving tunnels  
Tunnel driving apparatus has a shield with a plurality of cutter planks arranged side-by-side around the tunnel axis. The planks are supported and guided by two frames connected via a rigid bracing...
4045088 Oscillating disk thin seam mining machine with steering  
The specification describes a mining machine, in particular slot drilling machine for mining of minerals, especially ores of non-ferrous metals from narrow layers of reefs in hard rock, comprising...
4045087 Mining apparatus  
Mining apparatus for longwall mining comprising a mineral winning machine which traverses a mineral face, a row of self-advanceable roof supports parallel to the face, and a conveyor also parallel...
4043137 Apparatus for and a method of constructing a tunnel  
Apparatus for constructing an underground tunnel employs a drive shield composed of elongate drifting cutters disposed side-by-side in a circular configuration around a support frame. Hydraulic...
4037875 Full face miner  
A miner especially adapted for high-production mining of low-coal seams (24-36 inches thick) while providing maximum miner safety and complying with applicable federal safety regulations. One or...
4035024 Hard rock trench cutting machine  
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...
4029361 Longwall mining roof support for double deck machines  
A mineral mining installation intended for mining thick seams is composed of a series of units arranged alongside the mineral face and interconnected via a shifting system employing hydraulic rams...
4013319 Tunneling machine with massive guide for impact tools  
A tunneling machine is described which uses an array of impact tools for cutting a deep kerf that defines the wall of the tunnel. The impact tool provides impact blows through drill steels to which...
4005905 Excavating machine  
A machine for excavating underground galleries, comprising a frame displaceable within a gallery, an arm pivotally connected to said frame, means for adjusting the orientation of said arm in a...
3999616 Method and apparatus for establishing the drilling line of an overhead boring machine  
A bedplate is rigidly affixed relative to the tunnel floor and includes a centrally disposed shaft extending upwardly therefrom. A rotatable base member is mounted on the bedplate for rotation...
3998067 Continuous shoring machines for tunnel construction  
An improved shoring machine for tunnel construction in which a load-bearing structure provided with shores for shaping and shoring up the tunnel is supported on skids with the structure supported...
3995907 Underground excavating machine having independently movable half-frames  
The machine includes two half-frames vertically arranged side by side, with two parallel vertical shafts respectively supported by the two half-frames. A separate turret is pivotally supported...
3993355 Mining machine having pneumatic conveyance and cutter head floor driven about anchor  
A mining system for extraction of coal or the like from narrow seams has a conduit system for pneumatic conveyance of mined material. A leading section of apparatus comprises a cutter head assembly...
3989303 Tunneling machine  
A normally generally horizontal cylindrical open-ended casing having a cylindrical rotor coaxially mounted therein for rotary and axial movements, the rotor having a rear end forwardly spaced from...
3985390 Tunnel excavator  
Tunnel excavator for forming an upper half annular hollow space in the solid earth. The excavator has an arch shaped shield provided with a plurality of chambers in which excavating machines are...
3979921 Tunneling shield  
A tunneling shield for shielding the area of a tunnel between first and second tunnel machine assemblies which are longitudinally, relative to the axis of the tunnel, movable relative to each other...
3979151 Rock excavating arched tunnel forming machine  
A rock excavating machine for forming an arch type underground roadway includes a base carrying a forwardly extending cutter carrying arm having a cutter for cutting rock adjacent to the roadway...
3963080 Tunneling machine for boring a side drift  
A tunneling machine is disclosed for boring a side drift extending from a main tunnel. The earth boring machine includes a main beam assembly for longitudinal disposition within said tunnel. A...
3961825 Tunnelling machine  
An apparatus for tunnelling through soil, of the type in which a conical cutting head is rotatably mounted coaxially on a cylindrical housing and a toothed cutter bar is mounted radially on the...
3958830 Longwall mining system and archshield for mining tar sands, oil shales and the like  
In the underground mining of friable mineral deposits such as bituminous sands, method and apparatus are disclosed in which a working crosscut in the mineral deposit, is established, connecting two...
3957310 Tunnel boring machine with dual support members  
A tunnel boring machine comprising a rotary cutterhead assembly, a cutterhead support assembly on which the cutterhead assembly is mounted, a gripper assembly for gripping the wall of the tunnel,...
3957305 In situ values extraction  
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...
3955373 Tunnelling shields  
The invention provides a tunnelling shield including a plurality of axially extending rams fixed therein for thrusting against a tunnel lining erected behind or within the rear portion of the...
3922016 Tunnelling machine on skids with extensible wheels  
Tunnelling apparatus which during use is installed within tunnel lining sections and which employs a boom or jib with cutting means for detaching material from a working face to effect advancement...
3920277 Tunnel boring machine roll correction  
The present invention relates to a tunnel boring machine of the full face rotary type in which roll correction means are provided on the cutterhead support. The roll correction means may also by...
3905645 Tunnelling machines  
A tunnelling machine comprises a cutting head mounted on a cylindrical shield which has a sole plate adjacent its front end and at its lowest part. In use, the machine also comprises a sledge which...
3905426 Earth boring machine positioning system  
The present invention provides a system for moving an earth boring machine from an initial position on a floor to a desired drilling position on the floor. A rotation pedestal is positioned beneath...
3881776 Vermiculating polytoroidal thruster  
A vermiculating polytoroidal thruster which provides large thrust and brag forces for various devices comprised of a plurality of inflatable bladders mounted on a spool and held in place by end...
3879088 Longwall mining system  
A longwall mining device adapted to mine a mineral face in a mine comprising: A lower frame; At least one set of driven tracks mounted on said lower frame and adapted to be driven along the floor...
3873157 Mobile mine tunnelling machine having cooperable cutter, trough, loader and converyors  
A machine for use in tunnelling or mining installations and having a beam carrying a cutting device for acting on a working face. The beam is supported by a displaceable chassis for movement...
3870279 Stepper carriage advancement system  
An advancement mechanism for horizontal earth boring machinery which can automatically advance or retract the boring unit without independent manipulation of the locking unit associated with the...
3863989 HARD-ROCK MINING MACHINE  
A hard-rock mining machine having a percussive working member adjustably mounted for rotating in two mutually perpendicular directions i.e., compound movement on an extensible thrusting frame...
3861748 EARTH BORING MACHINE AND METHOD  
The machine frame is mounted onto a lower portion of an expandable forward support ring for sideways pivotal movement of the frame and the cutterhead carried thereby about an axis which is...
3860290 MINING, ROCK BREAKING, EXCAVATING MACHINE AND IMPLEMENT  
A mineral or other materials working machine or implement has an adjustable mounting means for a mineral or other materials working tool. Means is provided for adjusting said mounting means to...
3859810 TUNNEL BORING MACHINE  
The present invention relates to tunnel boring machines of the type generally comprising a cutterhead assembly rotatably supported on a cutterhead support assembly, a main frame fixed to the...
3856356 METHOD OF MINING MINERAL  
The invention is concerned with a system of mining mineral in which a self-propelled mining machine, having mineral cutting and collecting means, travels along a mineral face, from which it...
3854776 IMPACT MINING MACHINE HAVING CONVEYOR EXTENDING ON FRONT AND SIDE  
A mining or excavating machine comprises a carriage or self-propelled vehicle having mounted on it an extensible and maneuverable boom which carries a pressure fluid operated impact tool for...
3840271 TUNNELING MACHINE HAVING SWINGING ARMS CARRYING CUTTER DISCS  
Disc cutters are mounted at the forward end of support arms which are connected at their rear ends to a rotor which extends transversely of the tunnel. The rotor is driven to swing the support...
3827754 LOW PROFILE COAL MINING APPARATUS  
Apparatus for mining shallow seams of coal or the like employs a combination of parts resulting in a low profile of the machine and which may be operated without requiring an operator to accompany...
3799615 TUNNELING MACHINE HAVING GENERATOR MEANS FOR LIQUID JETS CARRIED ON CUTTER HEADS  
A machine for making tunnels through rock by slitting the tunnel front wall by means of high speed liquid jets which machine comprises a main frame, a carrier movably mounted thereupon, a cutter...
3784257 STEERING SYSTEM FOR A TUNNEL BORING MACHINE  
A tunnel boring machine having a large rotary boring head carried by a main frame which consists of a forward portion and a rear portion, the two portions being hinged together so as to provide for...
3761132 APPARATUS AND METHOD FOR REPOSITIONING EARTHEN MATERIAL  
Subterranean earthen material including intermixed soil and rocks is repositioned by delivering fluid under pressure downwardly to local portions of the material and effecting upward return flow of...
3754790 SELF-PROPELLED VEHICLE FOR A ROCK WORKING MACHINE  
A vehicle carries an extensible boom rotatable about a horizontal and vertical axes. The end of the boom arm carries a universally articulated rock breaking tool mounting means. The vehicle has two...
3736771 REMOVABLE BEARING ASSEMBLY FOR TUNNELING MACHINE  
An easily replaceable bearing assembly for a tunneling machine including a housing, a rotor within the housing, radial bearings for supporting respective ends of the rotor from the housing, a...
Matches 101 - 150 out of 262 < 1 2 3 4 5 6 >