Abstract: A milling machine can include a frame; a milling assembly coupled to the frame and including a drum housing and a cutting rotor located within the drum housing, the cutting rotor including a plurality of cutting bits configured to cut into a surface to define a cut surface; and a secondary edge cutter separate from the plurality of cutting bits and located to cut an edge of the cut surface such that the edge of the cut surface cut by the secondary edge cutter defines a sharper edge than the edge of the cut surface cut by the plurality of cutting bits.

Abstract: A cutter head includes a first member, a cutting bit, and a second member. The first member includes a first end and a second end and includes a first mass. The cutting bit is coupled to the first member proximate the second end. The cutting bit includes a cutting edge rotatable about the axis. The second member is rotatable about the axis and includes a second mass eccentrically positioned with respect to the axis. Rotation of the second mass causes the first member and the cutting bit to oscillate.

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: An apparatus for the milling and/or drilling cutting of materials, in particular for the removal of rock, minerals or coal, with a tool drum which is mounted on a drum carrier rotatably about a drum axis, in which a plurality of tool shafts, which carry cutting tools at their ends projecting from the tool drum, are rotatable drivable mounted, at least two of the tool shafts being drivable by a common gear drive which has power take-off gearwheels arranged fixedly in terms of rotation on the tool shafts, and a common drive element which cooperates with the power take-off gearwheels. The drive element and the tool drum being rotatable in relation to one another and the shaft axes of the tool shafts standing transversely to the drum axis.

Abstract: A continuous mining machine in which the machine is capable of mining a width exceeding the width of the machine chassis by articulating the cutter end of the machine relative to the rear of the machine.

Abstract: A drive device for rotating tools operating with oscillation superimposition, including a drive housing, a carrier sleeve mounted rotatably within the drive housing, a drive shaft mounted rotatably therein, a tool carrier to receive working tools and an oscillation-generating mechanism for generating the oscillation superimposition for the one or more tool carriers. The oscillation-generating mechanism for each tool carrier includes at least two intermediate shafts. The intermediate shafts are connected to the one or more tool carriers via an eccentric component part may be driven synchronously.

Abstract: Separating members are provided at both ends in a moving direction of each of workpiece mounting seats of a carriage. Each of the separating members separates an elastic seal blade, which seals an opening portion formed between a side wall portion of a casing body and a top plate, from an outer surface of a workpiece mounting seat.

Abstract: A mining machine is employed in a mechanized method for removing mineral from a reef in a rock face. The mining machine comprises a first cutting disc rotatably mounted on one side, a second cutting disc rotatably mounted on the machine, at a position off-set from the first disc and a cutting drum The first disc is adapted to remove a portion of the rock face as the machine is traversed along the face; and said drum is mounted upon an arm which is vertically repositionable to allow the cutting drum to remove rock from the roof and floor of the trench formed by the action of the cutting discs.

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 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: In a hewing or cutting roller (1) of variable cutting width, in which two pivotable tool carriers (4, 5) for receiving cutting or hewing tools are arranged on at least one lateral end face (2) of the roller transverse to the axis of the hewing or cutting roller (1), one of the tool carriers carries a locking pin (10) which cooperates with a hook-shaped locking member of the other tool carrier in the extended position of the tool carriers (4, 5).

Abstract: An improved road scraper includes a second scraping device mounted at a rear end of a road scraper of a known construction having a first scraping device. Between the road scraper and the second scraping device are disposed a vertical displacement mechanism and a horizontal displacement mechanism. By the actions of these mechanisms, the second scraping device may be extended outwardly from one side of the road scraper for scraping a greater width of the road.

Abstract: To excavate drifts, tunnels, stopes, caverns or the like, tools operating in an undercutting manner are mounted on radially pivotable tool arms, which are located on a rotary working head. With at least one tool (54) on a tool arm (51), a central region (Z) of the rock face is cut radially from the outside inwards by pivoting of the tool arm (32), an outer region (A) surrounding the central region (Z) of the rock face is cut radially from the inside outwards by pivoting of the tool arm (32). Pivot drives (30) for at least some tool arms (31, 32, 33) can be controlled in such a manner that cross-sections with contours deviating from a full circular shape can be cut. Muck removing devices (27, 28) are used for collecting and transporting away the muck produced by the cutting operation.

Abstract: A continuous mining machine comprising a forward cutter assembly connected for horizontal pivotal movements with respect to a rearward assembly mounted on the endless track assembly. The cutter assembly includes a central frame and a pair of said frames mounted on the central frame for independent pivotal movement about a pair of axes generally parallel with each other extending in a longitudinal direction corresponding generally to the forward direction of movement of the forward assembly with respect to the mine face. An elongated shaft is rotatalby mounted on each of the side frames so as to extend longitudinally from a position adjacent the rearward portion of the associated side frame forwardly thereof to an extent such that a forward end portion of each shaft extends forwardly of the associated side frame. A speed reducing units is mounted on each side frame between the associated shaft and the associated pivotal axis in driving relation with respect to the rearward portion of the associated shaft.

Abstract: Sectional cutting machine used to cut a curved gallery cross-section in underground mining and tunneling operations with cutting rollers arranged in a movable way in regard to the machine frame. The machine is characterized by the circumstance, that to cut the upper layer (10) and the gallery roof (11), an upper roller (2) configured as a frontal surface roller is used. The roller is moved on a support arm (4) along a rotation axis (6) which is parallel to the longitudinal axis of the machine. The lower layer is cut by a lower roller (3), configured as a lateral cutting roller with even front surfaces (9) of the roller bodies (8). This lower roller (3) is moved along a predetermined, even path, which is parallel to the gallery bed (17).

Abstract: A maneuverable mining machine is disclosed. The mining machine has a chassis with at least one cutting head mounted on the front of the chassis and adapted to cut into a mine face extending transversely across the front of the machine. The cutting head comprises a cutting drum which is rotatable in a plane parallel to the mine face. The cutting head is mounted on the chassis by way of a support member arranged to effect movement of the cutting drum parallel to the face. A conveying means is mounted on a chassis and is arranged to convey mine material from the front of the chassis to the rear of the chassis.

Abstract: A shield tunneling machine comprises a tubular shield body, a partition wall provided in the shield body, a rotary shaft supported rotatably by the partition wall and extending longitudinally of the shield body, a cutter head disposed on the front end of the rotary shaft and a mechanism for rotating the cutter head through the rotary shaft. The cutter head comprises a first cutter provided with a plurality of cutter bits and a second cutter provided with a plurality of roller bits. The machine also comprises a mechanism for moving straight forward and backward one of the first and second cutters relative to the other. The machine locates the first cutter more forward than the second cutter for excavating the face of stratum having a soft layer like clay layer with the first cutter and the second cutter more forward than the first cutter for excavating the face of the stratum having a hard layer like bedrock layer with the second cutter.

Abstract: A low profile thin seam miner includes a main frame mounting a lower transverse axis rotary cutter and a parallel axis conveyor rearwardly of the lower cutter. The main frame also mounts a forward transverse axis rotary cutter somewhat above the lower cutter, the forward upper cutter being supported on a longitudinal boom pivoted to the main frame and being vertically swingable under influence of a single cylinder. The main frame and all of its parts is incrementally advanced into the seam by the alternating action of two horizontal longitudinal parallel axis cylinders connected between the main frame and a pair of floor-engaging plates. Two vertical axis jacks are connected between the two floor-engaging plates and two cooperating overhead roof plates, connected with the floor-engaging plates by separate toggle linkages.

Abstract: Apparatus including a vehicle and rotor means carrying cutter structure is provided, for removing pavement in linear trench configuration or configurations.

Abstract: A continuous mining machine comprising a cutter assembly including a cutter frame, a pair of oppositely pitched independently vertically movable auger cutters having their axes of rotation disposed generally parallel with respect to one another, a mobile assembly disposed rearwardly of the cutter assembly and including a mobile frame having a pair of parallel power driven endless track units mounted thereon for independent pivotal movement of each unit about a common generally transversely extending horizontal axis disposed adjacent to the forward portion of the track units, a yoke assembly between the mobile assembly and the cutter assembly including a yoke frame pivotally interconnected with the mobile frame for pivotal movement about an axis generally parallel with the common pivotal axis of the track units and pivotally interconnected with the cutter frame for pivotal movement about a generally upright axis extending generally perpendicularly to the pivotal axis of the yoke frame with the mobile frame, an

Abstract: A safety wall treating method employed in the coal mining operation at the long wall face of a coal mine comprises shearing the long wall face leaving safety wall(s) at one or both side(s) of the face but shearing through the safety wall(s) at regular intervals to form intake or exhaust openings communicating with intake or exhaust tunnels.

Abstract: Tunnel driving apparatus employs a hollow support tube positioned axially centrally inside a drive shield. An inner cutting machine is supported and positioned inside the support tube and serves to cut away a central region of a working face. Outer cutting machines are also supported by the support tube but on the exterior thereof. The outer cutting machines serve to cut away the outer region of the working face. The cutting machines may each have a pivotable arm carrying cutting drums and are supported and guided for axial and rotary motion relative to the support tube.

Abstract: A tunnel-excavating machine in which a chassis carrying a cutting drum is displaceable toward the face of a subterranean structure in which a tunnel is to be formed, the chassis being provided independently from a roof-support unit which is connected to the chassis only by at least one fluid-pressure cylinder arrangement. The cylinder arrangement is connected to the unit and/or the chassis by vibration damping means so that the cylinder arrangement can advance the chassis relative to the roof support unit or vice versa and vibration transmission from the chassis to the roof support unit is damped.

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: A drum cutter-loader machine includes discrete units joined together by tie bolts extending transversely to the direction of advancing movement along a face conveyor. The units in succession from the stow side to the working side include a gantry casing supporting winch drive motors and straddling the face conveyor, a transmission box, a winch casing and casing carrying actuators coupled to arms carried by pivots at opposite ends of the winch casing. The arms carry cutter drums driven by motors supported by the arms. A toothed rack at the working face side is engaged by drive wheels driven through gearing in the winch casing and transmission box by the winch motors. The gantry casing is supported at the stow side through runners that engage a guide rail. In one embodiment, the machine is supported by rollers at the working face side on the toothed rack. In a further embodiment, the machine is supported by rollers at the working face side on a machine track.

Abstract: An improved mining apparatus for excavating material, such as coal, for example, from an earth formation, such as a coal seam, for example, wherein a miner, having a forward and a rearward cutter, is guided through the coal seam and excavates a borehole therein, the borehole being filled with a working fluid during the operation of the miner, the working fluid facilitating the operation of the miner and providing a vehicle for removing the mined material. Substantially all of the operations of the miner are controlled from the earth's surface thereby eliminating the necessity and accompanying hazards and costs involved in utilizing personnel underground during the mining operations.

Abstract: A mining machine comprises two cutting units each including a rotatable cutting head having cutting faces directed forwardly and rearwardly with respect to the direction of movement of the machine, and an elongated housing incorporating a drive mechanism for the cutting head extending along the axis of rotation of the cutting head, the cutting units being mounted side-by-side with the cutting heads adjacent each other, each housing being movable about a vertical axis towards the end of the housing remote from the cutting head and about a transverse horizontal axis between the vertical axis and the cutting head, means for moving the cutting units about the said axes, the housings of the two cutting units being mounted on a common horizontal slideway, and the slideway defining the transfer horizontal axis about which the cutting units may be pivoted.

Abstract: A mining machine adapted to be driven forwardly towards a working face comprises one or more cutting booms projecting forwardly from the machine, a cutting tool mounted on the forward end of the or each boom, and a drive mechanism for rotating the cutting tool relative to the boom, the said mechanism including a multi-speed gearbox whereby the cutting tool may be selectively driven at two or more different cutting speeds.

Abstract: An excavating and/or tunneling machine having a mobile support unit with suitable endless tracks for advancing the unit. The support unit serves as the base or chassis for an excavating screw, impact devices and excavating boom tools which all are cooperatively brought into operation to cut into material to be mined, excavated and/or tunneled.

Abstract: A self-propelled body portion is provided with a forwardly extending boom member pivotally secured thereto. The boom member includes a pair of parallel forwardly extending arm members that are pivotally secured to the body portion. A pair of parallel support members are movably secured to and extend laterally from the respective arm members. A drum member having cutting elements thereon is rotatably supported at the forward end portion of the support members. A pair of piston cylinder assemblies are secured to the respective arm members and each includes an extensible piston rod secured to a support member. The piston cylinder assemblies are connected by fluid conduits to a hydraulic valve member. A selected one of the drum member end portions may be moved laterally relative to the respective side edge of the gathering device by introducing fluid under pressure from the valve member into the piston cylinder assembly adjacent that side of the mining machine.

Abstract: A cutting-chipping system comprising an interconnected triaxial array of rotating drums each mounted for independent rotation. Each drum includes a plurality of spaced, outwardly extending teeth to sequentially cut, chip and break particulate mass such as coal or ice engaged by the system. The drums are oriented with no axis of drum rotation parallel to another and in a configuration wherein the direction of cutter travel from one drum is oblique to that of a second drum. In this manner, particulate matter engaged by the system is initially cut and chipped by a first drum to form a series of protuberances and/or weakened sections which, when struck at an oblique angle by a second drum, will chip and break away. The teeth may be comprised of picks, chisels or combinations thereof constructed and adapted for bidirectional rotation. The system may be adapted for applications upon land vehicles, water crafts, floating platforms, and the like.

Abstract: A coal mining machine intended to be used in a pit having a long-walled pit face and having a mechanism in which two cutting drums are attached to the main ranging arm of a ranging drum shearer through a sub-ranging arm and the position of said cutting drums is defined by the cooperation of said main- and sub-ranging arms.

Abstract: A support displaceable along a tunnel or gallery floor by means of a caterpillar drive is provided with a rotatable milling tool that can be brought into engagement with a lower portion of a face wall and with a reciprocal hammer engageable with an upper portion of the wall. The miller is operated to cut or grind material off the lower portion so as to undercut the wall. Then the hammer is operated to chip or break off the upper portion of the undercut wall. Both the miller and hammer are mounted on adjustable and directable arms. The loosened rock is carried off by a scoop-transport belt arrangement.

Abstract: 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 floor and an upwardly extending cutter carrying arm having a cutter for cutting rock adjacent to the raodway roof. The forwardly extending cutter is mounted on an arm which swings around a vertical axis, and which is elevatable along the vertical axis. The upwardly extending cutter carrying arm swings around a horizontal axis. Roof support jacks and beams are mounted on the base rearwardly of the cutters. Lateral jacks anchor the machine in the tunnel during cutting.