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3731977 |
EQUIPMENT FOR PREPARING UNDERGROUND DRIFTS, E.G. TUNNELS, CHANNELS, SHAFTS, ETC.
The invention relates to equipment for producing underground drifts, by means of which a much bigger drift driving progress can be realized than up till now, under practically optional soil...
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3713700 |
UNIVERSAL CONTINUOUS BORING MACHINE
Tools mounted on swinging arms are fixed to a rotating head which, in turn, is carried by a front casing. A rear casing is coupled to the front casing and forms a chassis through parallel...
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3703314 |
ROLL ATTITUDE CORRECTING MEANS, FOR TUNNELING MACHINES
The method comprises holding only one of two relatively movable tunneling machine portions against movement and displacing the other portion about a tunneling machine boring axis, and then holding...
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3695718 |
RAISE BORING MACHINE
A raise boring machine for producing a raise of circular cross section has a main frame with a rotating drum which has two rotating tangentially cutting heads. Three wall engaging shoes are...
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3677602 |
TUNNELING MACHINE WITH CONCRETE WALL FORMING MECHANISM
A tunneling machine having a shield with a spoil excavator at its head end, a truss trailing said shield, a wheeled support for the truss and comprising cradle supports which rest on the tunnel...
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3663054 |
MACHINE FOR DIGGING UNDERGROUND GALLERIES
The invention relates to a machine for digging underground galleries. This machine comprises a framework displaceable in the gallery, at least a pair of homologous arms connected to this framework...
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3653716 |
ROLLER BUTTER ROCK BORING APPARATUS AND METHOD
Kerf forming disc cutters are closely grouped on a cutter carrier. Where space permits a plural and equal number of cutter wheels are placed on each cutter path. A faster turning center cutter...
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3647264 |
MACHINE FOR DRIVING TUNNELS, DRIFTS, RAISES, AND THE LIKE
A tunnelling machine has a cutting unit which is mounted on a main frame to swing about a horizontal axis. The cutting unit has a rotating cutter head which cuts over the whole width of the tunnel...
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3647263 |
TUNNELLING MACHINES AND THE LIKE
A tunneling machine is provided with one or more cutter heads with rotary cutters driven by a motor in each cutter head and swingably mounted in a front frame portion of the machine on an axis...
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3643999 |
TUNNEL DRIVING MACHINE
A tunnel driving machine includes an elongated machine frame having a central large frame portion accommodating a tunnel tool driving gearing and the associated driving motors and a forwardly...
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3643998 |
TUNNELING MACHINE FOR NONCIRCULAR BORES
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...
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3642326 |
STEPPER ADVANCING APPARATUS FOR DRILLING INCLINED TUNNELS
The invention relates to a machine for cutting tunnels, shafts or the like, comprising a machine frame carrying a drill head at its leading extremity and a bracing or anchoring mechanism...
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3640580 |
DUST-ELIMINATING COAL-MINING APPARATUS
A coal-mining apparatus is fed against a vein of coal under pressure and advanced through the vein to progressively mine the coal. Back of the mining apparatus is arranged a board or partition...
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3639006 |
MACHINERY FOR DRIVING TUNNELS, GALLERIES OR THE LIKE
Circular section tunnels are bored out by a stepped series of concentric longitudinally displaced boring heads mounted on separate units, the leading head being circular and of the smallest...
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3630574 |
TUNNELING MACHINE WITH STEERING SHIELD
A tunneling machine, primarily for use in tunneling through hard ground. A digging assembly of conventional nature is mounted on a shield, but contrary to normal practice, the shield is smaller in...
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3619008 |
SUPPORTING AND ROTATIONAL RESETTING DEVICE ON A TUNNEL-DRIVING MACHINE
A tunnel-driving device comprising a machine frame for a driving machine which rotatably drives a tunnel-extracting tool. The machine frame is centrally positioned in respect to the tunnel by a...
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3614160 |
DEVICE FOR BRACING A DRIVING MACHINE WITH RESPECT TO A SHAFT OR TUNNEL WALL
A device for bracing a tunnel-driving machine with respect to the shaft or tunnel which is being formed includes a central drive machine shaft around which is mounted a carrier sleeve with a...
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3604754 |
APPARATUS FOR AND METHOD OF DRIVING A TUNNEL SHAFT
An apparatus for driving a tunnel shaft includes a driving machine which is supported within an auxiliary shaft which is pivotally mounted on a wheeled track car in a position such that it may be...
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3595322 |
A WALKING PLATFORM FOR DRILLING EQUIPMENT WITH MEANS FOR OSCILLATING THE DRILL TUBE
A walking platform for drilling equipment provided with a swivel arrangement adapted to adjustably hold a drill tube whereby the drill tube can be oscillated during a drilling operation. The...
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3584918 |
ARTICULATED TORQUE ARM CONSTRUCTION
A tunneling machine is disclosed having a support frame and a movable frame carried on the support frame by articulated torque arm units. Each unit includes two torque arms pivotally connected...
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3524680 |
MINING MACHINE HAVING SPIRAL CUTTERS WITH SCAVENGER BOARD
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3523426 |
PROCESS AND APPARATUS FOR DRIVING TUNNELS IN ROCK HAVING ZONES DIFFERING IN STABILITY
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3511539 |
FRUSTOCONICAL TUNNEL BORING HEAD HAVING RADIAL CONCAVE SCOOPS
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3498675 |
TUNNEL DRIVING MACHINE HAVING SYMMETRICAL BRACES
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3493165 |
CONTINUOUS TUNNEL BORER
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3486572 |
APPARATUS FOR FORMING INCLINED BORES
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3477762 |
MINING MACHINE AND METHOD
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3471201 |
MINERAL MINING ARRANGEMENT INCLUDING TRACK FOR A MINING MACHINE
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3468133 |
EXCAVATION TYPE SHIELD WITH NO ROTARY CUTTERS
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3467436 |
TUNNELLING MACHINE WITH ROTATABLE CUTTER CARRYING ARM FOR 360 CUTTING
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3459452 |
TUNNELING DEVICE
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3446535 |
TUNNEL DRIVING MACHINE
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3445137 |
SECTIONAL TUNNEL BORING MACHINE
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3442554 |
MACHINE FOR CUTTING A ROADWAY IN UNDERGROUND WORKINGS
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3437380 |
STEERING METHOD AND APPARATUS
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3433533 |
MINING MACHINE HAVING ROTARY CUTTER MOUNTED FOR INCREASED VERTICAL AND LATERAL RANGE OF CUTTING
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3433532 |
APPARATUS FOR EXCAVATING TUNNELS
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3433529 |
LONGWALL MINER HAVING CUTTER GUIDED ALONG MINE FACE,CURVED CORNER SECTION AND SIDE FACE
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3421796 |
RIB EXTRACTOR WITH A STEERABLE DRILLING HEAD STRUCTURE
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3420577 |
TUNNELLING MACHINE HAVING INDEPENDENTLY OPERABLE CUTTING HEAD AND CIRCULAR SAW
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3419311 |
Hydraulic circuit for holding and pushing cylinders of tunneling machine
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3418022 |
Tunnel boring apparatus
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3415574 |
Tunnel driving machine steering system
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3413035 |
Endless band conveyors
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3411826 |
Tunnel boring machine
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3408109 |
Mining machine with rocker arm controlled front pusher plate
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3404920 |
Tunneling machine with shield supported traveling excavator
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3399738 |
Raise driver
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3387892 |
Gallery driving machine with roller pilot drill and relatively rotated outer drills
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3386520 |
Apparatus for anchoring the pilot member in a pilot bore
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