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Actor Marlon Brando has four patents, all named "Drumhead tensioning device and method."
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| Number | Title | Issue Date |
| 8157330 | Method and apparatus for maintaining longwall face alignment A mining machine includes a light source and a roof support guide for detecting the relative angular alignment between the mining machine and the roof support. The light source in the form of a laser on the mining machine, directed toward the roof support. The roof ... | 04/17/2012 |
| 8157331 | Method for steering a mining machine cutter A control system monitors the angle of each ranging arm, with respect to the mainframe of the machine. While the machine is in a defined zone along the face, if the angle of the arm is detected to be lower than a parameter defined set-point called the undercut limit... | 04/17/2012 |
| 7600822 | Method for the mining of coal and coal planer installation A method for mining and a planer installation for the mining of coal, with a coal planer that can be moved by a planer chain that can be driven via a drive chain wheel of a drive station for the planer chain and that is deflected at a deflection chain wheel of a dri... | 10/13/2009 |
| 7549709 | Mining device The invention relates to a mining device that is used at the face of a mine, said device comprising a sensor that is mounted on the planer for identifying the rock and transmitting rock data for no more than two measuring points per extraction unit via radio to each... | 06/23/2009 |
| 7393059 | Planing device and method for activating a planning device A planing device and a method for activating a planing device, with a mining planer reversibly moveable by means of a planer chain, with at least two chain drives having variable-speed drive motors, with a planer travel measurement system and with a motor control de... | 07/01/2008 |
| 7133271 | Switchgear with embedded electronic controls In one general aspect, a system to control and monitor an electrical system includes a switchgear housing unit connected to the electrical system that includes a switchgear mechanism for controlling a connection within the electrical system and electronic controls f... | 11/07/2006 |
| 7014271 | Apparatus for detecting the state of rotation of cutting rollers of a shield tunneling machine An arrangement for detecting the state of rotation of cutting rollers (2) of a shield tunneling machine has at least one cutting roller (2) comprising a generator unit (12) that generates electrical energy when the respective cutting roller (... | 03/21/2006 |
| 6937080 | Current-controlled CMOS logic family Various circuit techniques for implementing ultra high speed circuits use current-controlled CMOS (C3MOS) logic fabricated in conventional CMOS process technology. An entire family of logic elements including inverter/buffers, level shifters, NAND, NOR, X... | 08/30/2005 |
| 6857705 | Mining machine and method A control system for a mining machine which moves in passes across a seam to be mined using absolute coordinates is disclosed. The machine is carried on rail and co-ordinates of the rail are measured along the length of rail. The rail is then moved to a new position... | 02/22/2005 |
| 6481802 | Control system for longwall face alignment In a control system for the longwall support with a plurality of hydraulically actuated supports (mining shields), which are each automatically rearranged in the sense of robbing, advancing, and setting as a function of the position of the mining machine ... | 11/19/2002 |
| 6361119 | Mining control system for adjusting the advance of mining tools A mining control system for adjusting the advance of the working tools of a mining machine with respect to working depth and/or working height connects to a detection device that is for recognizing the rock being mined and is carried along by the mining m... | 03/26/2002 |
| 6257671 | Device for protecting selective cutting machines against overload The invention relates to a device for protecting selective cutting machines against overload, in which the selective cutting machine has cutting tools, in particular cutting rollers, rotatably supported on a pivotable cantilevered arm, and both the cuttin... | 07/10/2001 |
| 5931540 | Drive system having a pin drive chain for a cutting machine for underground mining In the drive system according to the invention for a cutting machine which can be moved along a chain conveyor and has a pin drive chain arranged in a chain receptacle of the chain conveyor, the pin drive chain is attached at each of its two ends to a hyd... | 08/03/1999 |
| 5647640 | Continuously operating mining machines with plow and conveyor chains and method of operating same A mining machine especially for seam mining as in the mining of coal has a sensor for incipient sag of the plow pass of the continuously driven endless chain and a computer to which the sensor is connected and which controls the conveyor drive at the upst... | 07/15/1997 |
| 5624162 | Long-wall mining machine with a working chain A long-wall mining machine has an operating chain entraining conveyor flights or mining tools and displaceable in a trough which can be provided with rows of sensors of an inductive proximity type responding to the chain and the tools and generating measu... | 04/29/1997 |
| 5553925 | Apparatus for automatically adjusting the cutting horizon of a mining extraction apparatus According to the invention, automatic adjustment of the cutting horizon of a cutter installation or other mining installation is effected with the aid of recognition sensors which detect the footwall rock interface and which are disposed distributed over ... | 09/10/1996 |
| 5513902 | Driving system for driving flexible elongate members, such as chains or scraper-chain assemblies, in mineral mining installations and method of operating A drive system for driving a flexible elongate member such as a haulage chain for a mineral mining machine or scraper-chain assembly of a scraper-chain conveyor of a mineral mining installation employs main and auxiliary drive units each equipped with an ... | 05/07/1996 |
| 5228751 | Control system for longwall shearer Apparatus for measuring the degrees of roll of the body of a longwall shearing machine and providing signals proportional to the roll angle which are used to control drum cutting positions for controlling roof and floor horizons of a coal tunnel.... | 07/20/1993 |
| 5158341 | Method of steering a mining machine A method of steering a double-ended ranging drum type mining machine. The method includes the steps of positioning a first current cut follower at or substantially adjacent the center of the machine. A second previous cut follower is positioned at or subs... | 10/27/1992 |
| 5121971 | Method of measuring uncut coal rib thickness in a mine A method for remotely monitoring conditions such as carbon monoxide or methane gas concentration, longwall roof support pressure, machine parameters or uncut coal, trona or potash layer thickness in a natural resource mining system such as a longwall or c... | 06/16/1992 |
| 5116103 | Method of steering a mining machine A method of steering a double-ended ranging drum mining machine including the steps of positioning a first current cut roof follower at or adjacent the center of the machine and measuring the machine tilt by a second sensor. The coal thickness is estimate... | 05/26/1992 |
| 5087099 | Long range multiple point wireless control and monitoring system A method for remotely monitoring conditions such as carbon monoxide or methane gas concentration, longwall roof support pressure, machine parameters or uncut coal, trona or potash layer thickness in a natural resource mining system such as a longwall or c... | 02/11/1992 |
| 5020860 | Methods and apparatus for maintaining longwall face alignment Mine panel alignment is controlled by recording the electromagnetic phase modulation and/or signal attenuation between spaced distant transceivers in the panel and a transceiver on a cutting machine to measure the distance between the transceivers. Throug... | 06/04/1991 |
| 5017051 | Electrohydraulic control means for hydraulic self-advancing support units A control means for hydraulic self-advancing support units for underground working, comprising at least one electrohydraulic control device comprising an electric circuit for energizing electromagnets which actuate hydraulic valves, a command keyboard con... | 05/21/1991 |
| 5013091 | Method of indirect measurement of cowl position on a longwall shearer The position of the cowl on a longwall shearing machine is determined by loads, stresses or deflections measured on the ranging arm, clevis and pin connection on the ranging arm or lift cylinder and its linkage to the machine.... | 05/07/1991 |
| 4976495 | Method and apparatus for steering a mining machine cutter The trailing drum of a double-ended ranging drum shearer is steered in a seam by producing an algorithm which determines, as a result of information derived from signals from the machine dependant on its tilt, direction and amount of movement along a face... | 12/11/1990 |
| 4952000 | Method and apparatus for increasing the efficiency of highwall mining A highwall mining machine having a power head located on a bench adjacent the highwall and a cutter head operable to cut a mined hole into a coal seam when thrust forward by the cutter head through an intervening compression beam multisection includes sen... | 08/28/1990 |
| 4822105 | Double ended ranging drum shearer and method of controlling working height in mining face in use of the same A double ended ranging drum shearer is provided with a shearer body and a pair of drums disposed at front and rear end portions of the shearer body to be movable up- and down-wardly. The shearer is further equipped with detectors for respectively detectin... | 04/18/1989 |
| 4776637 | Cutting machines and method of controlling the cutting horizon A cutting machine including a base, a cutter movably mounted on the base, and a drive for moving the cutter reciprocably along the base to carry out a cutting operation. The cutter height relative to the base is alterable by a ram and the base includes a ... | 10/11/1988 |
| 4741577 | Double ranging drum cutter having load controller According to the applicant's invention a load detector is used, in which a load sensor and a vibration sensor are combined using an AND gate. A load signal from the load detector is used for the feedback control of the cutter drum height and double rangin... | 05/03/1988 |
| 4715657 | Double ranging drum cutter having bedrock sensor based on video image processing system A double ranging drum cutter for long wall type machines for coal extraction is disclosed, which comprises a drum cutter body, a television camera mounted on the drum cutter body for picking up an image of a coal layer cutting portion of a lower bedrock b... | 12/29/1987 |
| 4691967 | Apparatus for controlling the discharge of pressurized liquid from nozzles on a cutting drum of a mining machine A liquid discharge control system is provided for nozzles on a shearer or cutter drum for a drum-type shearer loader or heading or drifting machine used in underground mining. In addition to liquid discharge nozzles are distributed about the periphery of ... | 09/08/1987 |
| 4648659 | Method and hydraulic system for controlling supply of fluid to combine for extracting minerals A method for controlling the supply of fluid to a combine, wherein fluid is fed for actuating hydraulic cylinders 14, 15 of the drive for moving the combine and to a dust suppression hydraulic system 1. The same fluid, which is discharged from the hydraul... | 03/10/1987 |
| 4643482 | Steering of mining machines A double-ended ranging drum shearer is steered along a longwall face by using a series of spaced reference locations A, B, C, D, E, F, G, H. I . . . . The machine position is sensed so as to identify when the leading and trailing drum reach each desired r... | 02/17/1987 |
| 4634186 | Control system for longwall shearer A control system for controlling the elevation of a cutter of a longwall shearer in which the attitude of the body of the shearer and the rate of change of attitude with longitudinal movement of the shearer are monitored and the elevation of the cutter is... | 01/06/1987 |
| 4533180 | Fluid supply system for rotary cutter heads for mining equipment and to mining machines comprising rotary cutter heads having fluid supply systems A fluid supply system for a rotary cutter head of mining machines comprises a plurality of nozzles for directing air flow inducing sprays in the vicinity of the cutter head, and sensor means for sensing a preselected operational condition of the fluid sup... | 08/06/1985 |
| 4531782 | Mining equipment Mining equipment for steering the cutting horizon of a mining machine cutter which is mounted on a ranging arm and which in use makes repeated traverses along the working face, comprises a boom urged into contact with the mine roof formed on a previous tr... | 07/30/1985 |
| 4516807 | Fluid supply systems for rotary cutter heads for mining machines and rotary cutter heads comprising fluid supply systems A rotary cutter head drivably mountable on a rotary drive shaft of a mining machine comprises a hub assembly drivably mountable on the drive shaft and a barrel component secured around the hub assembly. Ventilating means comprising tubular elements are mo... | 05/14/1985 |
| 4466667 | Longwall shearer tracking system A tracking system for measuring and recording the movements of a longwall shearer vehicle (10) includes an optical tracking assembly (B) carried at one end of a desired vehicle path and a retroreflector assembly (A) carried by the vehicle. Continuous hori... | 08/21/1984 |
| 4465318 | Rotary cutting head for mining machines with means for inducing airflow and sensing thereof A rotary cutter head for a coal mining machine comprises sensor means for sensing a preselected state, as for example, the methane concentration in the vicinity of the cutter head and for deriving a signal indicative of the sensed preselected state.... | 08/14/1984 |
