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| Number | Title | Issue Date |
| 5184873 | Guides for mineral winning machines A plough guide which is composed of guide sections mounted on the working face side of the runs of channelling of a scraper chain conveyor. Toggle connections are provided on the abutting ends of the plough guide sections. Compartments accommodating the t... | 02/09/1993 |
| 4936714 | Valve devices for use with mining equipment A pressure-relief valve device employs a connector welded to the base of mining equipment equipment such as an hydraulic prop, so as to communicate with the pressure fluid in a working chamber thereof. A housing is screwed into the connector and the conne... | 06/26/1990 |
| 4934757 | Control of mineral mining machines A coal wining plough in a longwall working employs adjustable floor cutters mounted on curved carriers displaced in guideways on the body of the plough. Wedges abut on the upper ends of the carriers and are moved by hydraulic piston and cylinder units to ... | 06/19/1990 |
| 4874335 | Cable assembly for mineral mining installations A cable assembly for use in electro-hydraulic control systems of mineral mining installations is composed of a cable with a plurality of electrical wires encased in a multi-layered armoured sheath and connectors at the ends of the cable. The cable is bond... | 10/17/1989 |
| 4815898 | Roof supports To increase the height of operation of a shield type roof support an attachment is fitted to the floor sill or to each of a pair of spaced-apart floor skids. The attachment has side walls with bores for receiving pivot pins used to link the attachment to ... | 03/28/1989 |
| 4790347 | Pressure-relief valve devices A pressure-relief valve device has the stem of a valve member guided within a sealed bore of a guide piece screwed into or onto a sleeve-like housing. A spring in the housing acts on a pressure disk to create closure force on the head of the valve member.... | 12/13/1988 |
| 4787501 | Connections for scraper-chain conveyors To firmly connect an upper trough-like component of a scraper-chain conveyor to a lower component use is made of arch-like locking pieces which fit on a side plate of the lower component which overlaps the side wall of the upper component. The upper regio... | 11/29/1988 |
| 4762372 | Cutter-bit assemblies A cutter-bit assembly employs an arcuate wedge to secure a cutter-bit within a pocket of a holder. The wedge fits into a tapered gap between complementary curved surfaces of the holder and the cutter-bit shank. A projecting insert carried by the shank mat... | 08/09/1988 |
| 4737052 | Distributor The invention relates to a distributor for controlling hydraulic distribution between hydraulic consumers of a mine roof support unit and hydraulic supply lines extending along a mine working. The distributor comprises a supply block provided with a plura... | 04/12/1988 |
| 4735304 | Scraper-chain conveyor channel section A scraper-chain conveyor channel section comprises a return trough and a conveyor trough. The return trough is constituted by a pair of side walls interconnected by a floor plate. A respective support bar is fixed to each of the side walls of the return t... | 04/05/1988 |
| 4733770 | Transfer station A transfer station is disclosed for transferring mineral material from a longwall conveyor to a loading conveyor. The loading conveyor has two straight portions joined by a curved portion, one of the straight portions extending in the longitudinal directi... | 03/29/1988 |
| 4733771 | Connection devices for interconnecting the pans of scraper-chain conveyors The pans of a scraper-chain conveyor are interconnected by way of a dog-bone type connector with enlarged end regions and a central shank which fits into shaped compartments in the side walls of adjacent pans. A hook-like projection on one of the end regi... | 03/29/1988 |
| 4732472 | Methods of, and systems for, determining the position of an object 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 ... | 03/22/1988 |
| 4716928 | Pressure-relief valve devices A pressure-relief hydraulic valve device for mining equipment is composed of a hollow sleeve mounting a guide with a through bore slidably receiving the stem of a valve member. The stem is provided with a blind axial bore leading to a set of radial bores ... | 01/05/1988 |
| 4715659 | Mineral mining installations A mineral mining installation employs a scraper-chain conveyor constructed from individual pans joined end-to-end and a plough having a drive plate running beneath the conveyor and on a skid bed formed as a sub-frame structure on the floor of the working.... | 12/29/1987 |
| 4714154 | Material and transfer loading apparatus A loading apparatus comprises a ramp defining a loading surface and a pair of loading blades each having a triangular cross-section with a nearly perpendicular front face and a shallow inclined rear face relative to a desired delivery direction for materi... | 12/22/1987 |
| 4708531 | Pivot connections for use with mine roof supports 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 the goaf shield and these walls are interconnected with pivot connections each... | 11/24/1987 |
| 4708394 | Methods of controlling the operation of mineral mining installations As is known mineral, e.g. coal, is won from a mineral face with the aid of a winning machine guided for movement along a conveyor composed of individual pans joined end-to-end. The conveyor is advanced towards the face behind the machine by shifting rams ... | 11/24/1987 |
| 4702148 | Control of the actuation of hydraulic consumers The invention relates to a method for the simultaneous actuation of a plurality of hydraulic consumers by means of intrinsically-safe electro-hydraulic valves. The consumers are connected by hydraulic directional control valves to a pressure line and/or a... | 10/27/1987 |
| 4701249 | Mobile apparatus for cleaning remnants of carbon anode blocks A mobile anode-block cleaning machine has a steerable workshop floor vehicle provided with its own propulsion system and with a cleaning cabin in which anode remnants are freed from melt incrustations with the aid of a separator. The cleaning operation is... | 10/20/1987 |
| 4688937 | Methods of, and systems, for monitoring and/or controlling mobile cutting means 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 thre... | 08/25/1987 |
| 4673079 | Transfer station A transfer station assembly is provided for transferring mineral material from a longwall scraper-chain conveyor to a roadway scraper-chain conveyor. The transfer station includes a box frame, in which the upper run of the roadway conveyor is guided betwe... | 06/16/1987 |
| 4552487 | Mine roof support unit having dust suppression means 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... | 11/12/1985 |
| 4544185 | Hydraulic coupling device 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... | 10/01/1985 |
| 4526495 | Mine roof support assembly 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 s... | 07/02/1985 |
| 4492410 | Apparatus for controlling the position of a mineral mining machine 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 an... | 01/08/1985 |
| 4394875 | Actuator for a mine roof support unit A hydraulic control system for a mine roof support unit has a control valve assembly for controlling the hydraulic appliances of the unit, and an actuator for actuating the control valve assembly. The actuator has a valve block provided with a plurality o... | 07/26/1983 |
| 4347661 | Process of making electric assemblies Metallic anode holders are suspended by a conveyor, and moved in succession above a table supporting induction-heating coils. The coils can be raised to surround lower depending parts of the holders which may be optionally previously coated with a separat... | 09/07/1982 |
| 4251110 | Mineral mining installation A mineral mining installation comprises a mechanical mining machine (such as a plough or a shearer) and a hydraulic winning machine. The hydraulic winning machine has a plurality of high-pressure nozzles and a high-pressure pump for supplying the nozzles ... | 02/17/1981 |
| 4095436 | Method of, and apparatus for, controlling the advance of a tunnel drive shield Apparatus is provided for controlling the advance of a tunnel drive shield. The drive shield is of the type having a plurality of elongate implements (or planks) which are supported and guided on a frame. Hydraulic rams are provided for moving the planks ... | 06/20/1978 |
| 4094152 | Apparatus for laying a pipe line Pipe-laying apparatus employs an advanceable shield with a set of elongate cutter planks supported for longitudinal displacement by a frame. Rams interconnect the planks and the frame and enable the shield to advance to form an open trench. Behind the shi... | 06/13/1978 |
| 4084386 | Apparatus for and a method of tunnelling A drive shield of a tunnelling apparatus has elongate drive members supported and guided for longitudinal movement in a manner known per se. The drive members are connected to rear members or tails forming a rear shield and fluid concrete is introduced in... | 04/18/1978 |
| 4076318 | Cutter bit assemblies for coal ploughs A cutter bit assembly is composed of a carrier or holder secured or integral with a coal plough and a cutter part detachably secured to the holder. The holder has a head piece with opposite plane faces extending transversally to the cutting direction. A b... | 02/28/1978 |
| 4075857 | Shield-type support assemblies for mine workings A shield-type support assembly for a mine working is composed of three substantially identical frames aligned side-by-side. Each frame has a floor sill structure which carries props capable of bracing a roof cap and the floor sill structure between the ro... | 02/28/1978 |
| 4073153 | Drive shields for tunnelling A drive shield for use in a tunnel driving operation has an inner frame with hollow rings interconnected in a rigid fashion. A plurality of sharp-ended drive members combine to form a cylindrical shell contacting the tunnel wall. Rams serve to advance the... | 02/14/1978 |
| 4073151 | Mine roof support assemblies A mine roof support assembly comprises a pair of adjacent mine roof support units and apparatus for guiding and aligning these units. Each of the units has a floor sill and telescopic props for bracing against the roof of a mine excavation. Shifting ram m... | 02/14/1978 |
| 4068893 | Apparatus for controlling water spraying operations in mineral mines A mineral mining installation has a conveyor along which a winning machine such as a plough, is guided for movement back and forth along a mineral face. A series of water-spray nozzles are distributed along the working and is divided in the operational se... | 01/17/1978 |
| 4068485 | Apparatus for driving tunnels or the like Tunnel-driving apparatus utilizes a plurality of elongate drive or knife members arranged side-by-side and supported and guided for longitudinal movement on a frame. The members and the frame are advanced in succession during the driving process. Some or ... | 01/17/1978 |
| 4067619 | Longwall machine guide with detachable cover plate A guide for a mining machine, such as a plough, is constructed from a series of interconnected sections arranged end-to-end and secured with bolts to the mineral face side wall of a conveyor. Each guide section is composed of an L-shaped plate with an ups... | 01/10/1978 |
| 4055959 | Apparatus for use in mining or tunnelling installations Apparatus for use in mining or tunnelling installations comprises a shield for housing excavation machinery, and a floor sill for supporting said machinery. The shield is constituted by a plurality of generally cylindrical sections. Means are provided for... | 11/01/1977 |
