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| Number | Title | Issue Date |
| 7317641 | Volatile memory cell two-pass writing method A method is set forth for writing volatile memory cells embodied on an integrated circuit and taking the form of an array of volatile memory cells including a plurality of word lines and a plurality of bit lines. In use, a first write operation is performed on at le... | 01/08/2008 |
| 7316456 | Roadheading or mining machine with roof bolt drilling and setting devices In a roadheading or mining machine including cutting tools movable over the mine face and roof bolt drilling and setting devices, at least two roof bolt drilling and setting devices are pivotally connected with the machine laterally outside the longitudinal central ... | 01/08/2008 |
| 7207632 | Shield system for coal mining A mining system for remotely mining ores and minerals which protects against falling rock and allows evacuation of a miner and conveying system in the case of a cave in. A shield is advanced into a mine. Within the shield, the miner and conveying system are also adv... | 04/24/2007 |
| 7201541 | Prop head bearing A prop head bearing between the roof bar and the prop (4) of a shield-type support frame, comprising a ball-joint socket (3) on the roof bar and open towards the prop for receiving a ball-joint head (2) on the prop (4), with at least one ... | 04/10/2007 |
| 7192093 | Excavation apparatus and method In one embodiment, an excavation method is provided that includes the steps of: (a) contacting a rotating powered cutting head 440 of an excavator 400 with an excavation face 452, wherein, at any one time, a fi... | 03/20/2007 |
| 7165650 | High-rise, fire-fighting, rescue and construction equipment An elevator system for traveling on a rail attached to the outside of a high-rise building. One elevator has a telescopic arm attached for reaching any position on or above the building. The telescopic arm consists of two parts, which are interconnected with a pivot... | 01/23/2007 |
| 7128375 | Method and means for recovering hydrocarbons from oil sands by underground mining The present invention is directed generally to the combined use of slurry mining and hydrocyclones to recover hydrocarbons, such as bitumen, from hydrocarbon-containing materials, such as oil sands, and to selective mining of valuable materials, particularly hydroca... | 10/31/2006 |
| 7097255 | Method and means for processing oil sands while excavating The present invention is directed to the separation of bitumen, such as by the Clark process or by a countercurrent de-sander, in an underground excavation machine, such as a tunnel boring machine. ... | 08/29/2006 |
| 7073975 | Slot cutting apparatus and method An apparatus for cutting slots in pavement has a slot cutting assembly with several pairs of rotating blades mounted to a vehicle and vertically adjustable relative to the vehicle. A lift system moves the vehicle between a first position wherein the lift is not enga... | 07/11/2006 |
| 7055625 | Self-propelled instrumented deep drilling system An autonomous subsurface drilling device has spaced-apart forward and rearward “feet” sections coupled to an axial thruster mechanism between them to operate using an inchworm method of mobility. In one embodiment, forward and rearward drill sections are carried... | 06/06/2006 |
| 7044245 | Toroidal propulsion and steering system An apparatus comprises a body having a torus skin with inner and outer layers, and a drive system configured to propel the apparatus by moving the inner layer relative to the outer layer. The active skin propulsion system allows movement and steering of a device. A ... | 05/16/2006 |
| 7040712 | Shield tunneling method and shield tunneling machine An excavating drive (22) movable backward/forward is accommodated in a turnable body (9) which in turn is turnable about an axis perpendicular to an axis of and in a skin plate (7). A cutter device (38) ahead of a rotor (22) in the... | 05/09/2006 |
| 7017683 | Cutter for tunnel boring machine A cutter for a tunnel boring machine is equipped with a cutter body (1) with a slanting surface (2), a cylindrical contact surface (12) and a preferably tapered threaded portion with specially designed threads (6), a clamping ring (4 | 03/28/2006 |
| 7004286 | Motorized scaffold with displaceable worker support platform A motorized scaffold for self-displacement on land is comprised of a support base mounted on a pair of traction belts. Jacks are provided to immobilize and level the support base at a desired location. A platform assembly is secured over the support base on extendab... | 02/28/2006 |
| 6942301 | Method for boring and placing bolts for imbedding adhesively and device for carrying out this method A method and device for drilling and setting adhesive anchor bolts close to the mine face during the cutting operation of a tunneling or mining machine which is capable of being displaced on a traveling mechanism and includes a cutting cylinder or cutting head rotat... | 09/13/2005 |
| 6935443 | Mini disk bit A small sized disk bit includes a bit holder accommodated in a bearing journal on its side (overhangingly), and a disk body with asymmetrically designed wedge flanks mounted rotatably thereon. To enable the disk body to absorb high radial and axial strong forces enc... | 08/30/2005 |
| 6929330 | Method and system for mining hydrocarbon-containing materials The present invention is directed, inter alia, to devices and methods for excavating valuable materials, particularly soft ores such as oil sands, oil shales, and the like, that use one or more of a number of features, including backfilling for ground support, a sma... | 08/16/2005 |
| 6915896 | Cleaning drain apparatus for an auger assembly A drain apparatus for the intake end of an auger is disclosed. The drain apparatus comprises a bearing with radial arms, a cover with a cover portion, a drain and a drain cap for removably closing the opening of the drain. The drain apparatus facilitates a clean in ... | 07/12/2005 |
| 6848748 | Mining system with drilling, loading, conveyor, and support The extraction machine for underground ore extraction operations, with extraction of the extraction product by blasting has an advancing support equipment (11) and a face conveyor (18) coupled to it as well as at least one boring device (26) for... | 02/01/2005 |
| 6578926 | Mining machine having stabilizing apparatus and stabilizing apparatus A mining machine having a stabilizing apparatus includes a mining machine and a stabilizing apparatus attached to the mining machine. The stabilizing apparatus includes a stabilizing element and a moving arm attached to the stabilizing element and the min... | 06/17/2003 |
| 6505892 | Softwall mining method and device A softwall mining method and device. Each of a plurality of mining devices comprise a supporting portion, an earth moving portion and a coupling mechanism for advancing the earth moving portion into a mining face, and for advancing the supporting portion ... | 01/14/2003 |
| 6497536 | Roof support arrangement for mining apparatus and roof bolting equipment The invention provides an apparatus (2) for installing bolts into a mine entry, said apparatus including: a frame (8) having a forward end (20), a rearward end and lateral sides; at least one bolting rig (140, 142, 144, 146) operatively mounted to said fo... | 12/24/2002 |
| 6431653 | Tunnel-boring machine and method of using the same The tunnel rock drill (100) for driving a tunnel bore optionally in open or shielded mode comprises a shield tail (33), which is connected to the drill head (10) and which covers optionally the bore wall over a defined length; a bracing device (20), which... | 08/13/2002 |
| 6386640 | Oil tank arrangement for mining apparatus and roof bolting equipment The invention provides a vehicle which employs hollow structural members to store and cool hydraulic fluid used by the vehicle or by equipment located thereon. The preferred form of the invention provides an apparatus for installing bolts into a mine entr... | 05/14/2002 |
| 6224164 | Mining machine with detachable articulated cutting assembly A mining machine that has a chassis that defines an operator area thereon and has a mining assembly attached thereto. A vertically extending shield assembly is supported on the chassis to prevent material that is dislodged during the mining process from i... | 05/01/2001 |
| 6206478 | Tunnel excavator with crawler drive and roof support bearing frames The tunnel excavator (1) includes a cutter supporting body (3) provided with cutters (2) for excavating the earth. The tunnel excavator also includes crawlers (13) for moving backwards and forwards, and upper and side bearing frames (15, 16) which move ra... | 03/27/2001 |
| 6109700 | Mine roof bolting apparatus and method of using the same A modular roof bolting apparatus adapted to be installed on a face conveyor track of longwall mining equipment. A roof drilling assembly is rotationally mounted on a platform to an operating position and an installation position. The roof bolting drill is... | 08/29/2000 |
| 6089791 | Tunnel construction method To construct a tunnel in a formation (11, 15) with zones of high hydraulic pressure (15), a gallery (13) is driven from the stable formation (11) toward the problem formation zone (15). At least one lock zone (19) with pressure-tight gates (23, 23') is co... | 07/18/2000 |
| 6086159 | Softwall mining method and device Slurryable ore where the overburden is unstable and subject to collapse is mined from substantially parallel elongated main trenches connected by a perpendicular trench at the bottom of the mineral seam. A plurality of softwall mining devices supported by... | 07/11/2000 |
| 5961185 | Shielded cutterhead with small rolling disc cutters An improved disc type rolling rock cutter, and novel cutterheads employing such cutters. A rock cutter with an improved, simplified structure, with compact bearing, and smooth, rounded blade shape is disclosed. The design incorporates a cutter ring, beari... | 10/05/1999 |
| 5915790 | Tunnel boring machine A cutterhead is supported at the front part of a main frame so as to incline at a specified angle with respect to a vertical plane. The main frame includes (i) a roof support disposed at a position corresponding to where a reaction force acts in the direc... | 06/29/1999 |
| 5913573 | Roof bolt drilling and setting apparatus A displaceable mining machine (1) comprises roof bolt drilling and setting apparatus (5, 13). A conveyor (6) is articulately pivotable in a rear portion of the machine about axes (16, 16') in order to provide space for a roof bolt drilling and setting app... | 06/22/1999 |
| 5890771 | Tunnel boring machine and method A tunnel boring machine particularly adapted to operate at substantial depths below the earth's surface. The machine comprises a head section comprising a cutter head that is rotatably mounted to a support structure. There is a plurality of gripper shoes ... | 04/06/1999 |
| 5795032 | Mining machine with multiple propulsion members A mining machine that has an elongated frame member and a mining assembly attached thereto for dislodging material from a seam upon contact therewith. The mining machine is equipped with at least one first propulsion member for propelling the mining machi... | 08/18/1998 |
| 5634692 | Main-ancillary tunnel excavator A turnable tunnel excavator and tunneling method are provided which can alternate between construction of a main tunnel A and crosscuts B, and can excavate other tunnels without having to pass through an arc. It is comprised of a main machine and an ancil... | 06/03/1997 |
| 5632575 | Method and apparatus for controlled pumping of bentonite around a pipe jacked tunnel An apparatus and method for selectively injecting a liquid bentonite slurry around an exterior of a tunnel liner segment which is pressed into a tunnel being concurrently excavated during a pipe jacking installation. The bentonite slurry lubricates the ex... | 05/27/1997 |
| 5582467 | Displaceable working apparatus with extensible boom A displaceable working apparatus provided with a platform having an extensible boom and being displaced on a guide rail is disclosed. The apparatus has a main frame secured to a main support which is movably secured to the guide rail and a main stabilizin... | 12/10/1996 |
| 5547260 | Auxiliary cutter units of a shield machine Preliminary cutter units of a shield machine provided with preliminary cutters capable of continuously excavating soil in a working place even if main cutters are worn away. In a shield machine comprising a cutter head which is disposed at the front end o... | 08/20/1996 |
| 5527099 | Tunnel boring machine anchor shoe structure and process of operating a tunnel boring machine having such anchor shoe structure The anchor shoes of a tunnel-boring machine arranged in a circular configuration are individually truncated by being tapered rearwardly so that the girth of the circular anchor shoe configuration can decrease progressively in order to accommodate converge... | 06/18/1996 |
| 5474365 | Apparatus for mining a seam, in particular of coal A mining apparatus that works a horizontally and longitudinally extending seam having a vertical face formed by an upper hanging wall and a lower foot wall has a longitudinal row of walking props extending along the face and each having a roof-engaging ca... | 12/12/1995 |
