| Patent Number |
Title Of Patent |
Date Issued |
| RE31511 |
Rotary cutterhead for an earth boring machine |
January 31, 1984 |
| The main frame of the cutterhead comprises a plurality of radial spoke beams which are interconnected between a box-like hub structure and an annular box beam by which the cutterhead is mounted for rotation. Cutter mounting wells are defined by and between side wall portions of the radia |
| 6955232 |
Equipment for drilling vertical boreholes |
October 18, 2005 |
| The invention relates to equipment for drilling a vertical borehole in hard ground, the equipment comprising: casing put successively into place in the borehole; a drilling machine having a rotary cutting head and presenting a structural frame; torque and thrust transmission means h |
| 6390287 |
Self-adjusting carrying idler assembly |
May 21, 2002 |
| A conveyor belt idler support includes a fixed frame having support idlers for a return path of the belt. A movable frame is mounted on the fixed frame and is tiltable to support the carrying portion of the belt with a varying degree of tilt to allow the belt extend in a curved path arou |
| 5429198 |
Down reaming apparatus having hydraulically controlled stabilizer |
July 4, 1995 |
| A down reaming apparatus has an upper stabilizer which supports the down reaming apparatus in the bored hole. A plurality of shoe assemblies are radially attached to the hub of the upper stabilizer. The shoe assemblies are biased against a bored shaft wall by pressurized cylinders which |
| 5370194 |
Drive head assembly for drilling machine |
December 6, 1994 |
| The drive head assembly for a drilling machine includes a drive head body having a cavity with an upper portion and a lower portion. A bolt is located in the upper portion of the drive head body cavity, and a collet is located in the lower portion of the drive head body cavity. The colle |
| 5325932 |
Down reaming apparatus |
July 5, 1994 |
| A down remaining apparatus has an upper stabilizer which supports the down reaming apparatus in the bored hole. A plurality of wheel assemblies are radially attached to the hub of the upper stabilizer. Each of the wheel assemblies has rotatable tires oriented against the bored hole wall, |
| 5308150 |
Down reaming apparatus |
May 3, 1994 |
| A down reaming apparatus including a cutterhead body and a plurality of arms radially disposed on the cutterhead body with cutter assemblies on each arm. A first arm has a given length and additional arms each are of different length. Arm extenders having cutter assemblies are attached t |
| 5234257 |
Mobile mining machine having tilted swing axis and method |
August 10, 1993 |
| A mobile mining machine for cutting a tunnel in rock has a wheel-like cutterhead assembly supported by a pitch boom assembly that causes movement of the cutterhead assembly in the vertical plane. A swing boom assembly supports the pitch boom assembly and is supported by the main fram |
| 5234064 |
Roller cutter assembly having adjustable ring cutter spacing |
August 10, 1993 |
| A roller cutter assembly comprising a cutter hub adapted for rotation with respect to a rock face and having a peripheral surface with an axially extending width. The first cutter ring is located on the cutter hub. A second cutter ring is also located on the cutter hub. Both the first |
| 5205613 |
Tunnel boring machine with continuous forward propulsion |
April 27, 1993 |
| A tunnel boring machine includes a cutterhead having a plurality of cutting units and being rotatable on a machine frame. Two sets of three anchor shoes float relative to the frame and are disposed circumferentially, with the anchor shoes of the two sets alternating on the frame. The two |
| 5203614 |
Tunneling machine having liquid balance low flow slurry system |
April 20, 1993 |
| A tunneling machine convertible between a "closed mode" and an "open mode" of operation, having a rotatable cutterhead with muck openings communicating with a pressurizable cutterhead chamber and a pressure maintenance system to stabilize the tunnel workface when operating in the "cl |
| 5192116 |
Gantry-type mobile mining machine |
March 9, 1993 |
| A gantry-type mobile mining machine includes a cutterwheel having an axis of rotation substantially parallel to the tunnel work face and carried by a boom assembly pivotally movable about an axis also substantially parallel to the tunnel work face and to the cutterwheel axis of rotation. |
| 5192115 |
Tramming mobile mining machine |
March 9, 1993 |
| A mobile mining machine for cutting a tunnel in rock has a wheel-like cutterhead assembly supported by a pitch boom assembly that causes movement of the cutterhead assembly in the vertical plane. A swing boom assembly supports the pitch boom assembly and is supported by the base fram |
| 5127711 |
Hopper and hood combination for tunneling machine and tunneling machine having the same |
July 7, 1992 |
| A hopper and hood combination for muck transfer in a tunneling machine, and a tunneling machine having the same, in which a muck collar is mounted to a cutterhead support and projects into a rotatable cutterhead. A muck chute on the muck collar feeds earth to an earth conveyer when the m |
| 5012878 |
Rock boring machine drive head with up and down drilling capability |
May 7, 1991 |
| Drive head apparatus for driving the drill string of a rock boring machine, such apparatus comprising one or two drill string connectors (28) (30) having resilient means such as a coil spring (66) acting therebetween, with respective floating bearings (62) (64) separably secured thereto |
| 4646853 |
Shaft boring machine and method |
March 3, 1987 |
| A shaft boring machine including a rotatable cutterwheel assembly with a horizontal axis mounted on a carriage having vertical travel. The carriage is mounted on a slewing base frame and rotates about the vertical axis of the machine. An excavating unit for muck removal is mounted opposi |
| 4548443 |
Tunnel boring machine |
October 22, 1985 |
| A tunnel boring machine including the following elements: (a) a full face rotary cutterhead; (b) a cutterhead support on which the cutterhead is mounted; (c) a gripper system carried by a gripper support frame for reacting thrust, steering, roll correction, and torque forces; (d) a c |
| 4548442 |
Mobile mining machine and method |
October 22, 1985 |
| A first mobile mining machine for cutting mining tunnels in hard rock, which includes a horizontally swinging wheel-like cutterhead assembly mounted on a crawler and base frame assembly. The cutterhead assembly consists of a transverse horizontal axis wheel-like drum on which are mul |
| 4420188 |
Double shield tunnel boring machine |
December 13, 1983 |
| Front and rear shields are telescopically joined together. The front shield carries a power driven rotary cutterhead means. Thrust rams are provided between the two shields for pushing the forward shield forwardly relative to the rear shield while the cutterhead means is being operated t |
| 4381038 |
Raise bit with cutters stepped in a spiral and flywheel |
April 26, 1983 |
| A bit connectible from the lower end of a rotatably powered drill stem for enlarging a preformed pilot hole includes a cutter carrier frame on which are mounted a plurality of roller cutters having peripheral cutting edges which sweep concentric circles upon rotation of the raise drillin |
| 4365677 |
Earth boring apparatus |
December 28, 1982 |
| Large hole boring equipment is used for boring a large diameter blind pilot hole. Then such equipment is removed from the hole and a room is blasted at the closed or blind end of the hole. Then the large hole cutterhead is replaced by a reamer and the equipment is inserted back into the |
| 4283090 |
Conveyor mounted excavator |
August 11, 1981 |
| The front end portion of an endless belt type conveyor is detachably connected to the floor of a self-propelled tunneling shield, and the rear end of the conveyor is supported inclined upwardly by a trailing, mobile power unit which rides on spaced apart rails disposed along the tunnel |
| 4283090 |
Conveyor mounted excavator |
August 11, 1981 |
| The front end portion of an endless belt type conveyor is detachably connected to the floor of a self-propelled tunneling shield, and the rear end of the conveyor is supported inclined upwardly by a trailing, mobile power unit which rides on spaced apart rails disposed along the tunnel |
| 4270618 |
Earth boring apparatus |
June 2, 1981 |
| Large hole boring equipment is used for boring a large diameter blind pilot hole. Then such equipment is removed from the hole and a room is blasted at the closed or blind end of the hole. Then the large hole cutterhead is replaced by a reamer and the equipment is inserted back into the |
| 4234235 |
Rotary cutterhead for an earth boring machine |
November 18, 1980 |
| A main frame includes an annular beam by which the cutterhead is mounted onto an earth boring machine for a rotation about an axis of rotation. A plurality of radial spoke beams extend generally vertically at the front of cutterhead and curve rearwardly to intersect with the annular beam |
| 4202418 |
Roller cutter mounts |
May 13, 1980 |
| Roller cutters are mounted onto a cutterhead from the rear side of the cutterhead. A load transfer block is insertable between a stator portion of each cutter and a generally forwardly directed load-carrying surface on the cutter-head frame. Loads imposed on the roller cutter during bori |
| 4193637 |
Rotary cutterhead for an earth boring machine |
March 18, 1980 |
| The main frame of the cutterhead comprises a plurality of radial spoke beams which are interconnected between a box-like hub structure and an annular box beam by which the cutterhead is mounted for rotation. Cutter mounting wells are defined by and between side wall portions of the radia |
| 4192556 |
Tunnel boring machines |
March 11, 1980 |
| A machine for mechanical tunnel boring, of the rotating cutter head type, comprising a grid rigid with the cutter head, parallel to the theoretical boring surface, provided with a set of void spaces wherefrom the cutting tools slightly project, said void spaces having a size correspondin |
| 4190294 |
Excavator for use in a tunneling shield |
February 26, 1980 |
| An earth digging tool is mounted on the head of a tripod, the legs of which are double-acting hydraulic cylinders. The rear ends of the cylinders are connected to a rotor which is supported in a tunneling shield for rotation about an axis extending longitudinally of the tunnel. The cylin |
| 4009909 |
Upward tunneling |
March 1, 1977 |
| A boring assembly is advanced upwardly by thrust rams acting on a column guided traveling cross frame connected to the power tunneler from below by a non-rotating sectional support column. The support column is anchored to a holding table situated underground above the thrust ram while s |
| 3999616 |
Method and apparatus for establishing the drilling line of an overhead boring machine |
December 28, 1976 |
| 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 about the central shaft. A boring machine adapted to bore upwardly is secured to the rotatable |
| 3967463 |
Continuous tunnel boring machine and method |
July 6, 1976 |
| Front and rear shields are telescopically joined together. The front shield carries a power driven rotary cutterhead means. Main thrust rams are provided between the two shields for pushing the forward shield forwardly relative to the rear shield while the cutterhead means is being opera |
| 3966256 |
Tunneling equipment |
June 29, 1976 |
| A cutting tool is mounted on the head of a support tripod, the legs of which are double-acting hydraulic cylinders. The rear ends of said cylinders are either pivotally connected to a frame portion of a tunneling machine or to movable barrel portions of three base cylinders having fixed |
| 3965995 |
Machine for boring a large diameter blind hole |
June 29, 1976 |
| 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 bucket conveyor which carries them upwardly to a dischar |
