| Patent Number |
Title Of Patent |
Date Issued |
| 4732472 |
Methods of, and systems for, determining the position of an object |
March 22, 1988 |
| A system serves to establish the spatial position of an object automatically. The system uses a computer-controlled lasar beam scanning technique to locate the three-dimensional positions of mirror devices in successive measuring stations spaced from the object. |
| 4718542 |
Fixing of attachments to the side walls of the pans of scraper-chain conveyors |
January 12, 1988 |
| To facilitate the fixing of attachments to the side walls of scraper-chain conveyors upstanding recesses are provided in the side walls in upper regions where the upper flanges merge with the side walls. The recesses, which can be milled, open from the upper flanges and have a depth less |
| 4705160 |
Scraper-chain conveyors for mineral mining |
November 10, 1987 |
| A composite floor plate assembly for locating between side walls of a pan of a scraper-chain conveyor has an access plate fitted into an aperture in a floor plate proper. A locking bar secures the access plate in position. The access plate has the same thickness as the floor plate but li |
| 4701079 |
Pivot connections for use with mine roof supports |
October 20, 1987 |
| A mine roof support has gap seals in the form of L-shaped plates on its roof cap and goaf shield. The side walls of the plates overlap at the junctures between the roof cap and goaf shield and are connected with pivot connections each of which is composed of a pin inserted into apert |
| 4688937 |
Methods of, and systems, for monitoring and/or controlling mobile cutting means |
August 25, 1987 |
| A system serves to establish the spatial positions of a cutter head of a tunnel driving machine with precision and monitors and/or controls this position automatically. The system uses a computer-controlled laser beam scanning technique to locate the three-dimensional positions of mirror |
| 4682678 |
Gearing units for use with mining equipment |
July 28, 1987 |
| A gearing unit has an input shaft coupled via a gear train and a clutch to an output shaft which can propel a drive chain for a mineral winning machine or plough.The clutch is released by hydraulic pressure and a load sensor operates a valve device to release the clutch should an excessi |
| 4679429 |
Hydraulic ram stroke monitoring apparatus |
July 14, 1987 |
| Apparatus for monitoring the working stroke of a hydraulic ram 1 includes an indicator 3 having a housing 24 containing a tubular measuring chamber 25 connected to the hydraulic ram by a hydraulic line 2. The tubular measuring chamber is transparent on at least one side for the observati |
| 4667811 |
Channel sections of scraper-chain conveyors |
May 26, 1987 |
| A conveyor channel section or pan is composed of upper and lower components each having U-shaped rolled side walls with inwardly-directed flanges and floor plates. Additional side plates fixed to the exteriors of the side walls of the lower component project upwardly alongside the side w |
| 4667790 |
Gearing units |
May 26, 1987 |
| A gearing unit has a housing containing gearing drivably interconnecting a rotary input to an output shaft used to propel a drive chain of a mineral mining machine. A clutch is provided which is released by hydraulic pressure to disengage the drive automatically should excessive loading |
| 4658952 |
Scraper-chain conveyor channel section |
April 21, 1987 |
| A scraper-chain conveyor channel section comprises a pair of side walls and a floor plate extending between the side walls and connecting the side walls together. Each of the side walls has upper, lower and intermediate inwardly-extending flanges. The floor plate is connected to the |
| 4646905 |
Retaining element |
March 3, 1987 |
| Connection means for connecting two components such as conveyor channel sections or guide sections includes an elongate connector. The connector is insertible into laterally-open recesses formed in coupling elements attached to the two components. The laterally-open recesses define an |
| 4626034 |
Cutter-bit assemblies |
December 2, 1986 |
| A cutter-bit assembly employs an arcuate wedge 16 to secure a cutter-bit 2 within a pocket 4 of a holder 1. An additional deformable insert or resilient backing piece 18 is also located in an arcuate gap between the cutter-bit shank and a curved surface of the holder. The insert or backi |
| 4622998 |
Hydraulic control device |
November 18, 1986 |
| A hydraulic control device is incorporated in a hydraulic control system for a mine roof support assembly. The hydraulic control system includes a plurality of hydraulic control valves which are controlled by the hydraulic control device. The hydraulic control device is constituted by a |
| 4614134 |
Overload protection system for planetary gear drive |
September 30, 1986 |
| A gearing unit with planetary gearing stages employs a load sensor and a clutch for disengaging drive through the gearing should the sensor detect overloading. The load sensor is in the form of a stationary pin provided with a strain gauge transducer easily accessible via a bore in a hou |
| 4607890 |
Guides for mineral mining machines |
August 26, 1986 |
| A mineral mining machine guide is composed of individual sections joined end-to-end alongside the pans of a scraper-chain conveyor. Each guide section has a side wall component and a web plate component with spacers therebetween dividing upper and lower chain guide passages. An inclined |
| 4601218 |
Gearing units for use with mining apparatus |
July 22, 1986 |
| A gearing unit with planetary gearing employs a load sensor in the form of a stationary pin provided with a strain gauge transducer easily accessible via a bore in its casing. A brake with respective plate carriers is associated with the planetary gearing. One of these carriers is held |
| 4600340 |
Mine roof support unit |
July 15, 1986 |
| A mine roof support unit includes a pair of generally parallel floor girders, and an advance mechanism positioned between the floor girders. The advance mechanism comprises a hydraulic advance ram and a guide rod system. The advance ram is pivotally connected between the guide rod sy |
| 4600097 |
Scraper units for mine conveyor scraper-chain assemblies |
July 15, 1986 |
| A scraper unit for a scraper-chain assembly is composed of a scraper bar which locates with a pair of coupling pieces at each of its ends. The coupling pieces trap chain links therebetween. The bar has pockets underneath its end regions which locate with the lowermost coupling pieces |
| 4589701 |
Cutting machine |
May 20, 1986 |
| A cutting (winning) machine comprises a frame which is provided with a pair of endless drive tracks. A mast is pivotally mounted on the frame for movement between an upright working position and a non-working position (in which it lies substantially flat on the frame). The frame also |
| 4588071 |
Chain conveyor with diverging interleaved scrapers |
May 13, 1986 |
| A load conveyor for a cutting machine comprises two outer, endless chains, and an endless further chain positioned between the two outer chains. Each of the chains carries scrapers. All of the chains are driven, via a common drive drum, by a drive station. The scrapers of adjacent chains |
| 4583785 |
Mineral winning plough |
April 22, 1986 |
| A coal plough has an elongate plough body which is provided with cutters at each end. The plough body is supported at each of its two ends, by a flat narrow skid on a plate of a plough guide. The skids constitute wear-resistant members and are connected to the plough body in a readily |
| 4572709 |
Control apparatus |
February 25, 1986 |
| Apparatus for controlling the working stoke of the hydraulic props of a mine roof support unit is disclosed. The control apparatus comprises a control valve whose input side is connected to a hydraulic pressure line, and whose output side is connected to a working chamber of each of the |
| 4571127 |
Advance mechanism for mine roof support units |
February 18, 1986 |
| A so-called externally-situated advance mechanism is arranged between the floor sills of adjacent mine roof support units. The advance mechanism includes two laterally-spaced guide rods, and two advance rams positioned above the guide rods. The front ends of the guide rods are connected |
| 4571003 |
Apparatus for controlling the position of a mineral mining machine |
February 18, 1986 |
| Apparatus for controlling the position of a mineral mining machine, such as a coal plough, guided for movement back and forth along a guide employs inclined piston and cylinder units coupled via ball-and-socket joints to brackets on a conveyor supporting the guide and to connectors which |
| 4561697 |
Guides for mineral mining |
December 31, 1985 |
| A guide for a mineral mining machine, such as a plough, is composed of guide structures at the mineral face sides of the pans of a scraper-chain conveyor. Each guide structure defines upper and lower passages through which a chain for driving the machine passes. The passages are closed o |
| 4558629 |
Hydraulic control means for pipe thrust-jacking apparatus |
December 17, 1985 |
| Pipe thrust-jacking apparatus includes a pressure ring 5 which is advanceable by a plurality of hydraulic rams 3. The rams are controlled by hydraulic control means having a plurality of hydraulic control valves 19. Each control valve is associated with a respective hydraulic ram, and is |
| 4557808 |
Method of applying a corrosion-proof and wear-resistant coating to a workpiece |
December 10, 1985 |
| The invention is directed to a method of applying a corrosion-proof and wear-resistant coating to the piston rod of a hydraulic ram which is intended to be used in an underground mine working, or in similar workings. The method comprises the steps of applying a layer of nickel to the |
| 4557525 |
Cutter bit assembly |
December 10, 1985 |
| A cutter bit assembly comprises a holder and a cutter bit. The holder is formed with a pocket into which the cutter bit can be inserted. The cutter bit is retained within the pocket by means of an arcuate wedge inserted into a tapered gap formed between respective curved support faces fo |
| 4556256 |
Cutting appliances for use in tunnel driving operations |
December 3, 1985 |
| In a tunnel driving apparatus, and particularly such apparatus where a work face is supported by fluid, a cutting appliance is employed which is composed of a swinging arm carrying a cutter head. The arm can range over the face to detach material therefrom with the cutter head. Means for |
| 4552487 |
Mine roof support unit having dust suppression means |
November 12, 1985 |
| A mine roof support unit has a roof shield for supporting the roof of a mine working, and a goaf shield for screening off the goaf space of the working. The mine roof support unit is provided with dust suppression means constituted by a flat-section spray nozzle arranged along the front |
| 4549469 |
Hydraulic ram |
October 29, 1985 |
| A hydraulic ram for use as an advance ram in mining operations has a plurality of permanent magnets embedded in its piston rod. At least one sensor is associated with a guide bush fixed to the piston rod end of the cylinder of the ram. The or each sensor is accommodated within a resp |
| 4548444 |
Mineral winning plough |
October 22, 1985 |
| A plough for winning material (such as coal) from a face has a plough body which supports a carrier for roof-level cutters. Means are provided for adjusting the vertical position of the carrier with respect to the plough body. The adjustment means comprises a worm mounted on the plough b |
| 4544185 |
Hydraulic coupling device |
October 1, 1985 |
| A hydraulic coupling device is connected to a multi-line hose comprising a plurality of hydraulic lines housed within a flexible sheath. The coupling device comprises a cylindrical nut, a plurality of plug pins housed within the nut, and means for holding the plug pins within the nut. Th |
| 4537221 |
Hydraulic control devices for use with mining apparatus |
August 27, 1985 |
| A compact hydraulic control device for use with mining apparatus is composed of a housing block containing tappet-operated valves. A multi-part cam shaft serves selectively to operate the valves by displacing the tappets by manual control effected by external levers. To automatically |
| 4534681 |
Mine roof supports |
August 13, 1985 |
| A mine roof support has a main roof-engaging structure 2 carried by hydraulic props 6 in known manner and an auxiliary roof-engaging structure at the front end of the main roof engaging structure. The auxiliary roof-engaging structure can be swung up and down and is itself of multi-p |
| 4534584 |
Hydraulic connecting device |
August 13, 1985 |
| A hydraulic connecting device is disclosed, the device being for interconnecting a multi-line hose and a coupling device. The hose has a plurality of flexible hydraulic conduits bunched together within a protective sheath. The coupling device has a plurality of plug pins held within |
| 4526495 |
Mine roof support assembly |
July 2, 1985 |
| A mobile mine roof support assembly has three mine roof support units coupled together by a common transverse beam. Roller devices are mounted beneath the floor sills of the support units. The roller devices are spring biased away from their floor sills so that they can lift the floor |
| 4523512 |
Telescopic support props for mineral mining |
June 18, 1985 |
| A telescopic prop for use in mine workings extends and retracts over three stages. The prop has an outer main base member 1 with respective first, second and third concentric inner members 2, 3, 4 disposed one within another. The first inner member has a piston 6 in which is arranged a |
| 4515410 |
Rack assembly |
May 7, 1985 |
| A rack assembly for a mine winning machine drive arrangement is described. The rack assembly is associated with a longwall conveyor along which a mine winning machine is movable by the drive arrangement. The rack assembly is constituted by a plurality of rack sections and a plurality of |
| 4514873 |
Equipment for cleaning remnants of carbon blocks |
May 7, 1985 |
| Apparatus for cleaning bar-mounted remnants of carbon blocks includes a machining station defining a working position. A breaking device is provided for loosening incrustations adhering to the remnants at the working position. The individual remnants are moved into the working positi |
| 4509799 |
Apparatus for controlling the position of a mineral mining machine |
April 9, 1985 |
| Apparatus for controlling the position of a mineral mining machine, such as a plough, guided for movement along a guide comprises inclined piston and cylinder units connected via ball-and-socket joints between connectors at the ends of elongate beams guided on roof supports and brackets |
| 4505518 |
Mineral winning machines |
March 19, 1985 |
| A mineral winning machine in the form of a coal plough has adjustable floor cutters. To set the floor cutters at different heights use is made of arcuate levers as carriers for the floor cutters which are slidably guided as known per se. Eccentric stop members engage on the upper ends of |
| 4505379 |
Scrapers for scraper-chain conveyors |
March 19, 1985 |
| A scraper-chain conveyor has a scraper-chain assembly composed of a pair of outboard chains with scapers therebetween. The assembly passes along upper and lower runs and the lower run is enclosed. Each scraper has an upstanding front face and a lower foot face perpendicular thereto. The |
| 4501044 |
Apparatus for cleaning components used in electrolytic smelting |
February 26, 1985 |
| Apparatus for cleaning the so-called anode bars of electrodes re-cycled for use in electrolytic smelting comprises a frame with upstanding columns supporting a raisable and lowerable carriage. A table is displaceably supported between the columns on the carriage and a pair of depending |
| 4493340 |
Hydraulic coupling |
January 15, 1985 |
| A hydraulic coupling comprises a coupling device and a connector. The coupling device has a casing which houses a plurality of plug pins. The plug pins are held in place in the casing by means of a retaining disc. The connector is provided with a plurality of bores which define sockets |
| 4492410 |
Apparatus for controlling the position of a mineral mining machine |
January 8, 1985 |
| Apparatus for controlling the position of a mineral mining machine, such as a plow, guided for movement along a guide, employs inclined piston and cylinder units connected between connectors at the ends of elongate beams or rods guided on support units and brackets on a conveyor supporti |
| 4485724 |
Hydraulic control apparatus |
December 4, 1984 |
| Hydraulic control apparatus serves to operate roof support props of a mineral mining installation. An automatic setting arrangement with a valve device ensures the props become set against the roof with a high uniform force by connecting a prop pressure chamber to a pressure fluid source |
| 4484677 |
Scraper-chain conveyors |
November 27, 1984 |
| A scraper-chain conveyor has channel sections or pans arranged end-to-end along which a scraper-chain assembly is circulated. Each pan is composed of side walls with a floor plate therebetween. Pockets are provided on the exterior of at least one of the side walls to accept and locate th |
| 4482270 |
Drive shields for tunnel-driving apparatus |
November 13, 1984 |
| A drive shield for tunnel driving has a plurality of cutters supported for longitudinal displacement on a frame. The cutters are hollow and contain double-acting hydraulic rams used to displace the cutters and the frame. The rams are linked to the cutters via alignable connector shackles |
| 4480381 |
Aligning and locating apparatus |
November 6, 1984 |
| Apparatus is disclosed for aligning and locating the nipples of an anode rod with the blind bores formed in one surface of an anode block. The apparatus includes a support table mounted for vertical movement on a stand. Alignment means are mounted on the stand above the support table. |
