Abstract: A method for driving tunnels, galleries, shafts or the like with a driving device (1; 2; 15), including: that a cutting head (4) rotating around a general axis of rotation (R) and having cutting elements directed essentially radially outwardly is applied against a rock surface to be worked. The rock cutting elements (13), are formed on cutting rolls (7) are brought to roll against the rock side during pressing against the rock and rotation of the cutting head (4), and the rock cutting elements during rolling are brought to cut sidewardly arranged grooves in the rock surface at a distance from each other. The invention also concerns a rotatable cutting head and a device and a rig for driving tunnels, galleries, shafts or the like.

Abstract: A method and rig for driving tunnels, galleries, shafts or the like. The rig has a movable base unit that over a support unit supports a carrying unit which in turn carries a cutting head having outwardly directed cutting elements. The method includes rotating the cutting head around a general axis of rotation and applying the cutting head against a rock surface to be worked. The carrying unit is swung into a first chosen mutual position in respect of the support unit. The support unit is rotated into a second chosen mutual position with respect to the base unit around an axis that is essentially longitudinal with respect to the base unit. An angle of operation of the cutting head is controllable.

Abstract: A rotary cutter drum for a continuous mining machine having a cutter drum, a bearing hub, an inner bearing, a sealing assembly and a shaft disposed in an inner portion of the cutter drum, the shaft having at least one flat passageway disposed along a longitudinal axis of the hub for allowing a lubricating fluid to move from an oil reservoir to a bearing surface.

Abstract: A mining machine includes a cutting mechanism with an arm, and a substantial weight of more than a thousand pounds attached to the arm. The mining machine also includes a first disc cutter adapted to engage the material to be mined and mounted on a first disc cutter assembly for eccentrically driving the first disc cutter, the first disc cutter assembly being mounted within the substantial weight. The mining machine also includes at least a second disc cutter spaced apart from the first disc cutter assembly and adapted to engage the material to be mined, and mounted on a second disc cutter assembly for eccentrically driving the second disc cutter, the second disc cutter assembly being mounted within the substantial weight.

Abstract: The device for cutting and mixing of soils can be adapted to standard-equipped hydraulic excavators and facilitates the continuous cutting of sealing and stabilizing slits and mixing of stabilizing additives. The device is designed as a rotating and traversing combination tool. The cutting-mixing unit consists of a cutting drum (1) and a mixing drum (4) mounted on a common shaft in an upright housing (3). The cutting drum, which is equipped with front and peripheral teeth, loosens the soil to be processed. By disposing the cutting and breaking tools (2) at the front and periphery of the cutting drum, the loosened soil moves in the direction of the subsequent mixing drum. The mixing drum comprises a plurality of blades (5) separated by a distance along the peripheral surface arranged such that a flow arises opposite to the feed direction, said flow processing the loosened soil into a flowing mixture comprising the additives and the mixing water, said flowing mixture filling in the resultant slit.

Abstract: A mining machine includes a cutting mechanism with an arm, and a substantial weight of more than a thousand pounds attached to the arm. The mining machine also includes a first disc cutter adapted to engage the material to be mined and mounted on a first disc cutter assembly for eccentrically driving the first disc cutter, the first disc cutter assembly being mounted within the substantial weight. The mining machine also includes at least a second disc cutter spaced apart from the first disc cutter assembly and adapted to engage the material to be mined, and mounted on a second disc cutter assembly for eccentrically driving the second disc cutter, the second disc cutter assembly being mounted within the substantial weight.

Abstract: A core breaker positioned between cutting drums on a mining machine that includes a generally circular support member, and a beveled blade portion on the radial outward surface of the support member. The beveled blade portion includes a plurality of wedge-shaped portions and a plurality of serrated portions. Each wedge-shaped portion is connected to an adjacent wedge-shaped portion through a mediate serrated portion. Both the wedge-shaped portions and the serrated portions are generally beveled. The wedge-shaped portions and serrated portions maintain curvatures, giving the blade portion a generally undulated appearance. The blade portion has two faces, and can be beveled on a single face. Alternatively, the blade portion can be beveled on each face. The beveled surfaces can be substantially symmetrical or asymmetrical from a view in the radial direction of the generally circular support member.

Abstract: The invention relates to a cutter head for a ground cutter machine having at least one cutter motor. Each cutter motor comprises: two hydraulic motors, each comprising a stator and a rotor and having a common axis; a single shaft extending along said common axis and having two ends; two cutter drums mounted to rotate; two transmission assemblies for drivingly connecting each end of the common shaft to one of said cutter drums; and mechanical members for constraining the rotor of each hydraulic motor directly in rotation with the transmission assembly corresponding to the cutter drum that is closer to the hydraulic motor.

Abstract: In a cutting machine (1) with cutting heads or rollers (7) rotationally mounted on a pivotable cutting arm (6), including a loading ramp or a conveyor (9) extending in the direction to the mine face for receiving and removing the cut material, wherein the cutting arm (6) is mounted on a carriage (4) displaceable on guides extending in the longitudinal direction of the machine, the carriage (4) carries guide rods (12) extending in the longitudinal direction of the machine and engaging in tubular guides (13) of the machine frame (3) carrying a chassis (2).

Abstract: The invention relates to a cutter head for an excavator machine having at least one cutter motor, each cutter motor comprising: a fastener plate; a mounting structure comprising an end portion and a mounting assembly; a single hydraulic motor mounted in said mounting assembly and having an outlet shaft presenting two ends, said motor and the end portion of the mounting structure being offset in a direction that is orthogonal to said fastener plate; a plurality of conduits formed in the thickness of the fastener plate; and a plurality of ducts formed in said end portion of the mounting structure to connect the hydraulic motor to said conduits.

Abstract: A cutting device including a cutting drum, a motor housing, a structural web extending between the motor housing and the cutting drum, and a structural member attached to the cutting drum adjacent the web. The structural member has a structural surface including an edge adjacent the web and an edge away from the web. The surface has an edge away from the web, the surface being inclined away from the web by having the edge adjacent the web forward in the cutting direction of the edge away from the web. In the preferred embodiment, the structural member is a bit mechanism including a bit, and the structural member houses the bit.

Abstract: A hydraulic milling machine for excavators characterized by the fact that the driving shaft (1) for the transmission of the torque from the grooved rotor (2) of the central hydraulic motor to the milled tool holding drums (4) is subject only to the torsion stress since all the other dynamic stresses on the drums are dumped on the supports (5) fixed on the frame structure.

Abstract: A cutting device including a cutting drum, a motor housing, a structural web extending between the motor housing and the cutting drum, and a structural member attached to the cutting drum adjacent the web. The structural member has a structural surface including an edge adjacent the web and an edge away from the web. The surface has an edge away from the web, the surface being inclined away from the web by having the edge adjacent the web forward in the cutting direction of the edge away from the web. In the preferred embodiment, the structural member is a bit mechanism including a bit, and the structural member houses the bit.

Abstract: A rotary drum cutting head (40) has pair of rotary drums (16, 18) which present a plurality of cutting implements (42) adapted for milling rock or other excavatable terrain, and a hydraulic motor (46) centrally disposed between the pair of rotary drums (16, 18). The hydraulic motor (46) has a rotatable output shaft (50) to which the drums (16, 18) arm rigidly and directly connected at opposed driven ends (83) of the shaft (50) the opposed driven ends (83) extending in opposite directions from the hydraulic motor (46) in longitudinal alignment with the rotational axis (20) of the rotary drum (16, 18) and rotatably supporting the rotary drums (16, 18).

Abstract: A rock excavating or cutting device including a disc cutter that is driven by drive means to rotate in an oscillating and nutating manner by driving the disc cutter about separate oscillating and nutating axes aa, bb which are angularly offset from one another and which intersect at a point ahead of the disc cutter.

Abstract: A cutting machine for cutting depressions in a road surface. The cutting machine includes a rotatable cutting drum connected with a drive device for rotating the cutting drum and an engaging device for moving the cutting drum out of and into contact with the road surface. The drive device includes a gear box with a flywheel located on the input side of the gear box and the cutting drum comprises a plurality of cutting teeth, the teeth removably retained to the cutting drum to effectively cut the road surface and includes a means for anchoring a tooth shank to a tooth holder permanently affixed to said cutting drum. A power unit that moves the cutting drum along the road surface is provided with a detector for continuously detecting a distance that the cutting drum is moved by the power unit and for generating a signal indicative of the distance moved.

Abstract: A cutting head is provided for milling rumble strip depressions in a road surface. The cutting head has a center rotational axis and a transverse diameter that varies along the length of the rotational axis so that an outer cutting surface of the cutting head defines a plane curve, such as an ellipsoid with truncated ends. The cutting head is mounted on a milling machine and rotated about the rotational axis as it is moved alternately up and down into the road surface. As the milling machine moves down the road, the movement of the cutting head creates spaced apart rumble strip depressions in the road. Because of the elliptical configuration of the cutting head cutting surface, the dimensions of the depressions can be varied along both the forward and lateral axes by simply varying the depth of cut. The curved profile of the cutting head along the rotational axis creates rumble strip depressions that avoid the sharp ninety degree corners and vertical side walls found in conventional rumble strips.

Abstract: In a driving or mining machine including cutter rolls or drums which are mounted for rotation on a cantilever arm pivotable in the vertical direction, bearings and/or gears are arranged in the axial direction of the cutter rolls or drums between parts of the rolls or drums. The bearings and/or gears are connected with the cantilever arm or an actuating means provided in the cantilever arm. At least one stationary cutter bit is arranged on the cantilever arm in the region of the bearings and/or gears between neighboring parts of the rolls or drums in a plane through which the axis of the cantilever arm passes. The cutter bit has at least two cutting edges, a first cutting edge being provided substantially tangential to the enveloping curve of the rotating bits in the direction of the axis of the cantilever arm and a second cutting edge being provided so as to enclose an angle with the first cutting edge.

Abstract: 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 inadvertently entering the operator area. The shield assembly may be selectively vertically extendable and may be equipped with a ventilation duct assembly to withdraw dust and gases away from the operator area. The mining machine may be equipped with a mining assembly that extends the entire width of the chassis and that can be advanced forwardly of the chassis and swung down across the seam face during mining. The present invention may also be equipped with a quick disconnect assembly for detachably mounting the mining assembly or other mining implement to the mining machine.

Abstract: Rock cutting head comprising a one-part steel housing attachable to a working machine lug, an electric or hydro motor being attached to the rear portion of the housing and two uni-axial similar cutting drums being provided at its front portion, the rear housing portion, in which a drive pinion directly or indirectly connected to the motor is provided, being terminated toward the lug with a widened connection plate, its front portion supporting outer bearing hubs, in which the shafts of the two cutting drums uniformly connected to a middle drive spur-toothed wheel are provided and wherein a larger intermediate wheel is provided in the housing between drive pinion and drive spur-toothed wheel.

Abstract: The grinder mixer assembly includes a drum assembly with end plates rotatably supported on stub shafts. These stub shafts are secured to arms of a yoke assembly. The spindle of a first hydraulic motor is secured to one of the stub shafts. The housing of the first motor is connected to a center portion of the drum by a key. The spindle of a second hydraulic motor is secured to the other stub shaft. The housing of the second motor is to a center portion of the drum by a key. The keys transmit torque from drive rings attached to each motor to driven rings attached to the drum mid way between the end plates of the drum.

Abstract: An apparatus is provided for mining a mineral seam. The apparatus includes a frame, a propulsion system as well as first and second cutters and a cutter motor for winning aggregate material from the mineral seam. The apparatus is characterized by the cutter including a transmission gearcase having a bevel gear set, first and second sun gears, first and second planetary gear sets, first and second fixed planetary gear set carriers and first and second rotating ring gears. The output from the drive motor is connected to the bevel gear set which in turn drives the first and second sun gears which in turn drive the respective first and second planetary gear sets that in turn drive the first and second ring gears. The ring gears drive the first and second cutters, respectively.

Abstract: An apparatus for treating rock, minerals or similar materials includes at least two tool-bearing sleeves supported by bearings. The tool-bearing sleeves are arranged in eccentric relationship to a common drive shaft. The tool-bearing sleeves are counterbalanced with reference to respective counterweights.

Abstract: A cutter head for use in the removal of hard rock. The cutter head combines a standard cutting member, such as button bits or wedge-lock cutters, with cutting blades having a diamond cutting surface. The cutting blades cutting surface is positioned above the standard cutting members so that in operation, the cutting blades form grooves in the rock face and the standard cutting members fracture the rock adjacent the grooves through tensile forces.

Abstract: An apparatus for cutting and breaking rock includes a cutting disc (13) having an attached wedge (11). Cutting disc (13) can be rotated by shaft (16) to cut a groove into rock. After a pre-determined distance, wedge (11) is forced into the cut groove to cause the rock above the groove to be broken away. Shaft (16) is powered by a drive motor, and can include a kick back mechanism to prevent wedge (11) from being trapped in the cut groove. The entire apparatus can be mounted to the three point linkage of a tractor.

Abstract: A mining apparatus includes a frame, a mechanism for cutting an arched opening in a seam and winning the cut mineral, and a propulsion system. The cutting mechanism includes a boom supported mineral cutting drum having a barrel or bulging cylindrical shape. The propulsion system is canted on the frame at an angle from the horizontal in order to match the floor of the arched opening being cut by the drum.

Abstract: A system for crushing a wall of rock comprising a first device, such as a track hoe, for moving with at least two degrees of freedom, a second device, such as an articulating boom, secured to and moving with the first device for moving with at least two degrees of freedom, one of the two degrees of freedom of the second device being different from the two degrees of freedom of the first device. A rotating stone cutting mechanism is secured to the second device, the stone cutting mechanism comprising a rotating drum having a plurality of tooth holders on the surface thereof in a helical array relative to the axis of the drum, each of the tooth holders having a very hard tooth, preferably of a refractory carbide, releasably secured thereto. A motive structure causes rotation of the drum about its axis. The motive structure includes a motor, preferably hydraulic, a sprocket driven by the motor, a chain and a second sprocket coupled to the drum.

Abstract: The device comprises a support (9) provided with means (12) for its demountable fastening to the reactor structure (1) above and vertically in line with the component (3), a turret (10) mounted rotatably on the support (9) about its vertical axis, a device for taking up forces (11), on which the lower end of the turret (10) is mounted rotatably, an arm (18) mounted movably on the turret (10) in a radial direction, a first cutting unit (20) mounted on the movable arm (18), a trolley (25) mounted movably on the turret (10) in the vertical direction, a vertical second cutting unit mounted on the trolley (25) and a means for handling (30) fragments of the component (3).

Abstract: A core breaker comprising a plurality of bits mounted on a suitable support and capable of being readily replaced when the bit becomes worn or damaged during the breaking of a core which is left between the conventional rotating cutter drums of a motorized coal cutting machine.

Abstract: A crawler track mounted mining machine having a frame and an adjustable jib carrying an endless cutting chain having cutters and loading flights mounted on the frame. A bridge on the frame and spaced arms having one end pivotally connected to the bridge and the other end supporting a front plate upon which the jib is adjustably mounted by a rotatable bearing supporting a cross member which carries hinges pivotally supporting the jib. Hydraulic rams extend between the cross member and the jib to rotate the jib between a vertical position and a horizontal position and a hydraulic ram extends between the rotatable bearing and the front plate to rotate the front plate and the jib in a horizontal plane between a position perpendicular to the crawler tracks and a position parallel to the crawler tracks. Hydraulic rams extend between the bridge and the arms to raise and lower the arms and the jib relative to the frame.

Abstract: An improved cutting head for a mining machine having a rotary cutting head and shaft removably and rotatably attached to the forward end of a mining machine such that the shaft and cutting head alone may be removed from the forward end of the machine and repaired at the site where the mining is taking place.

Abstract: A tunnel or road header is provided with a caterpillar running gear and a portal frame. A cutter head means engageable with a tunnel face is mounted displaceably on the frame on a horizontal track extending transversely of the longitudinal direction of the roadway. The cutter head means consists of a shearing machine equipped with a carrier arm which is pivotal parallel to the rock face through more than 360.degree. and a shearing drum which is carried by the carrier arm and which rotates about an axis extending toward the rock face and parallel to the roadway floor.

Abstract: A continuous mining machine includes a mobile body portion with a cutter drum member rotatably mounted on the front of a boom member which extends forwardly of the body portion. The cutter drum member has an intermediate drum section and a pair of canted end drum sections. Driven input shafts extend through openings between the intermediate section and the end drum sections. Each input shaft is drivingly connected to a first stage of a two stage planetary gear assembly which surrounds an end drum drive shaft that extends the length of each end drum section. A second stage of the planetary gear assembly is drivingly connected to and is axially aligned with the first stage to transmit rotation outwardly to the end of the end drum section. A shearable driving coupling is axially positioned on the end drum drive shaft at the end of the end drum section. An external portion of the drive coupling is connected to the second stage and an internal portion is connected to the end drum drive shaft.

Abstract: A mining machine is utilized for making original generally horizontal bores in coal steams, and for enlarging preexisting bores. A single cutting head is mounted for rotation about a first horizontal axis generally perpendicular to the dimension of elongation of the horizontal bore, and is pivotal about a second horizontal axis, parallel to the first axis, to change its cutting, vertical position within the bore. A non-rotatable body member, with side wall supports, is mounted posteriorly of the cutting head, and includes a conveyor mechanism and a power mechanism operatively connected to it. The machine can be sumped into a bore and then the cutting head rotated about the second axis to change the vertical position thereof, and then moved rearwardly, any cut material being continuously conveyed to the bore mouth by the conveyor mechanism.

Abstract: A mining machine is disclosed comprising a mobile base and a cutting head assembly at a forward end of the mobile base having a cutter drum rotatable about an output shaft disposed along the longitudinal axis of the cutter drum. A drive system for the cutting head assembly comprises at least one motor for driving at least one toothed motor pinion and a generally cylindrical combination gear having generally circular end surfaces. A bevel or face gear is formed in at least one of the end surfaces, having teeth adapted to mate with and be driven by the toothed motor pinion. The combination gear has a worm gear formed in the outside cylindrical surface, which is disposed in driving engagement with the teeth of an output gear integrally and coaxially connected to the output shaft of the cutter drum.

Abstract: A continuous miner includes a pair of resonant beams for driving a cutting blade rigidly secured to their lower anti-nodes. By mounting the beams so that they can pivot about both upper and lower nodes, the miner may be operated to make either vertical or horizontal cuts. When making vertical cuts, the beams are pivoted upward about their upper nodes to drive the blade in an upward arc in front of the miner, the blade being rearwardly off-set from the center line of the beams to reduce blade drag. To make horizontal cuts, the beams are maintained substantially vertically as the miner is driven forward. The precise angle of the blade relative to the ground may be adjusted to reduce blade drag by tilting the beams an appropriate amount about their lower nodes.

Abstract: A cutter drum member of a continuous mining machine is rotatably mounted on the front end of the machine. The drum member includes an intermediate section and a pair of canted end sections. Cutting elements extend from the surface of the respective drum sections and provide a continuous cutting pattern along the entire length of the drum member. Input drive shafts extend through rear openings between the adjacent ends of the intermediate section and the end sections. Rotation is transmitted from the input drive shafts through meshing bevel gears and planetary gears to rotate the intermediate section. The adjacent ends of the intermediate section and end sections include meshing gear teeth secured to the external surface of the sections so that the canted end sections are driven by the external meshing gear teeth.

Abstract: In a drag bit excavating device having a plurality of cutting elements, each element comprising a core extending along an axis; a bit carrier supported on the core; cutter bits supported by the carrier along a three dimensional spiral having constant pitch and increasing radius along at least a portion of the axis, the carrier being relieved to provide radially extending spaces between the turns of the spiral; a frame supporting the core, carrier, and bits for rotation about and advance along the axis; and a drive to provide rotation, whereby bits slot the material to be excavated while the material between portions of the resulting slot extends into the spaces to be subsequently broken away; support means for supporting the elements in an array sloping along a plane with their respective axes parallel to each other, the plane sloping in a direction transverse to the axes, the axes being spaced along the plane in the direction of slope, the elements having their drives arranged so that each core, carrier, and

Abstract: An improved trim chain take-up is provided for mining machines in which the trim chain extends around the rotary cutting auger and the auger support arm and is driven by the auger to cut clearance for the support arm. The take-up includes a yoke slideably mounted behind each auger support arm in guide means affixed to the machine framework, and supports a cylindrical idler roller in a manner allowing free rotation of the roller. The idler roller bears against the inner side of the endless chain loop and tensions the chain when the yoke is pushed away from the auger support arm by push means mounted either on the frame or integral with the yoke. A locking device in the embodiment of a self-actuating wedge shaped spacer is included with the take-up to be positioned between the take-up and auger support arm to prevent the take-up from backing off even when the push means relaxes.

Abstract: An improved locking device for a trim chain take-up for mining machines in which the trim chain extends around the auger and the auger support arms and is driven by the auger to cut clearance for the support arm. The take-up is slidably mounted behind the auger support arm in guide means affixed to the machine frame. When the take-up is moved away from the support arm to increase the tension on the chain, the locking device moves into the space developed between the take-up and support arm to prevent the take-up from backing off and reducing the chain tension. The locking device comprises a plurality of thin spacers pivotably retained in a side-by-side stacked relationship on a rod mounted to the support arm. The spacers are further disposed such that they are held in an inoperative position resting on the take-up until the take-up has moved past their respective positions whereupon they pivot about the rod into the operative position between the take-up and support arm.