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| Number | Title | Issue Date |
| 5641058 | Method and a device for tensioning endless drive belts The invention employs pressure and displacement sensors for the automatic monitoring and adjustment of the pre-tension of endless belts, in the form of chains or the like, which sensors determine the pressure in the cylinder space and the movement of the ... | 06/24/1997 |
| 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 |
| 5524839 | Impact roll crusher assembly An impact roll crusher for grinding up material, for example in mineral mining, employs a roll equipped with impact heads which co-operates with part of a conveyor transporting the material. The roll is rotatably mounted in a housing and a hood is connect... | 06/11/1996 |
| 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 |
| 5471860 | Apparatus for straightening and orientating projections or nipples of anodes Apparatus for straightening and orientating the deformed nipples of an anode employs framework through which each anode suspended by its anode rod is passed. A hollow casing with openings for receiving the nipples is raised relative to the framework to lo... | 12/05/1995 |
| 5452629 | Device for selectively tensioning and clamping studs mounted on a pressure vessel to permit nuts to be tightened or loosened Apparatus for tightening and releasing nuts on screw-threaded studs to fit or release a cover on a pressure vessel employs several devices for subjecting each of the studs to tension to clamp the stud whilst the nut is rotated thereon. Each device has a p... | 09/26/1995 |
| 5441206 | Mobile machine for processing raw mineral ores in-situ A mobile machine for use in opencast mining employs a chassis with endless tracks and the chassis has outriggers projecting laterally outwardly from the tracks. A hopper supported by one outrigger receives raw ore material excavated by another machine or ... | 08/15/1995 |
| 5426968 | Arrangement for determining the tension in a chain used in a mineral mining installation A drive station for a mineral mining installation employs a plough box containing a chain wheel around which a drive chain for a mineral winning machine, such as a plough, is entrained. The chain wheel is supported on a shaft rotatably supported by bearin... | 06/27/1995 |
| 5427142 | Valve device for use in electro-hydraulic control systems of mining installations A valve device for use in an electro-hydraulic mining control system employs a cuboidal housing composed of two separate sub-housings. One sub-housing block has bores containing valve assemblies with cartridges which can be inserted into or withdrawn from... | 06/27/1995 |
| 5338103 | Control arrangement for adjusting the position of a mineral winning machine in a mineral mining installation A mineral mining installation has a plough guided for movement along a scraper-chain conveyor. Roof supports are connected to the conveyor with the aid of shifting mechanisms which employ boom-type guide linkages designed to co-operate with a compact cont... | 08/16/1994 |
| 5330159 | Apparatus for automatically inserting and removing screw-threaded elements into and from tapped bores Apparatus for automatically inserting and removing screw-threaded elements into and from threaded bores of a pressure vessel to fit or detach a cover employs a screw-clamping device with a carrier ring supporting individual mechanisms for each screw-threa... | 07/19/1994 |
| 5287955 | Connections for inter-connecting the pans of scraper-chain conveyors The pans of a scraper-chain conveyor are interconnected with a dog-bone type connector which fits into laterally open shaped pockets in the side walls of the pans. A projection on one of the ends of the connector engages in a recess closed off from the si... | 02/22/1994 |
| 5271297 | Apparatus and device for automatically inserting and removing screw-threaded elements into and from tapped bores Apparatus employs a device for automatically threading and unthreading studs into tapped bores of a pressure vessel containing nuclear fuel to detach or fit a cover thereto. The apparatus also employs a device with a carrier ring supporting piston and cyl... | 12/21/1993 |
| 5267640 | Transfer station assembly for scraper-chain conveyors A transfer station between a scraper-chain face conveyor and a scraper-chain roadway conveyor in a mine working has a frame for guiding the scraper-chain assemblies of the conveyor so that material discharges from the face conveyor to the roadway conveyor... | 12/07/1993 |
| 5252006 | Mine roof support A mine roof support employs a pair of floor skids carrying hydraulic props on which a roof-engaging structure is mounted. A goaf-shield is pivotably mounted to the roof-engaging structure and is connected with a lever system to the floor skids. A shifting... | 10/12/1993 |
| 5249664 | Scraper units for scraper-chain assemblies A scraper unit for a scraper-chain assembly is composed of a scraper and a clamping strap which define beds for receiving one or more chain links. The clamping strap is fixed to the scraper with the aid of nuts and bolts and one or more pivot joints forme... | 10/05/1993 |
| 5238330 | Displaceable mine roof support assemblies A mine roof support frame has a pair of spaced-apart floor skids on which hydraulic props support a roof engaging structure. A shifting mechanism with a ram in a trough-like housing and a guide beam is positioned between the skids and serves to displace t... | 08/24/1993 |
| 5167437 | Mechanisms for drawing a chain into or through a channel of a chain guide A retraction mechanism for drawing a plough drive chain into a chain channel of a coal plough guide built onto the side of a scraper chain conveyor comprises a retraction slide which can be drawn through the chain channel and guided. The plough chain is c... | 12/01/1992 |
| 5161671 | Transfer station for transferring material between conveyors in a mine working A transfer station for transfer of material from a longwall face to the gate or roadway employs a box frame uniting a scraper-chain face conveyor with a scraper-chain gate or roadway conveyor. An opening in the tray of the face conveyor inside the box fra... | 11/10/1992 |
| 5156258 | Scraper-chain conveyors for use in mineral mining A channel section or pan for a scraper-chain conveyor has a floor plate welded between side walls. The floor plate has reduced thickness end regions which provide upper and lower tongues which establish joints with corresponding complementary tongues of t... | 10/20/1992 |
