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| Number | Title | Issue Date |
| 7331735 | Apparatus, system, and method for supporting a gate entry for underground full extraction mining An apparatus, system, and method are disclosed for supporting a gate entry or a connecting entry. The apparatus includes a support member, a controller, and a vehicle. The support member is configured to selectively engage a mine roof and a mine floor within a gate ... | 02/19/2008 |
| 7207632 | Shield system for coal mining A mining system for remotely mining ores and minerals which protects against falling rock and allows evacuation of a miner and conveying system in the case of a cave in. A shield is advanced into a mine. Within the shield, the miner and conveying system are also adv... | 04/24/2007 |
| 7201541 | Prop head bearing A prop head bearing between the roof bar and the prop (4) of a shield-type support frame, comprising a ball-joint socket (3) on the roof bar and open towards the prop for receiving a ball-joint head (2) on the prop (4), with at least one ... | 04/10/2007 |
| 6945738 | Method and apparatus for safety protection of temporary roof support Embodiments of the present invention are directed to a method and apparatus for safety protection control of temporary roof support. In one embodiment, a temporary roof support has a load sensing member. In another embodiment, a beam structure of temporary roof supp... | 09/20/2005 |
| 6386640 | Oil tank arrangement for mining apparatus and roof bolting equipment The invention provides a vehicle which employs hollow structural members to store and cool hydraulic fluid used by the vehicle or by equipment located thereon. The preferred form of the invention provides an apparatus for installing bolts into a mine entr... | 05/14/2002 |
| 6325460 | Machine used in connection with underground mining having an operator protective shield A protective shield for machines having an operator station protects an operator located on the operator station during operation of the machine. The protective shield defines a flexible curtain of elongated members which covers an exposed side of the ope... | 12/04/2001 |
| 5938376 | Automated temporary roof support, bolter and method In an automated temporary roof support and roof bolting machine there are several safety features. The machine has forward operator's stations on each side of the machine. All the controls for operating the machine are in the operator's stations. The mach... | 08/17/1999 |
| 5816750 | Automatic grid layout system A grid layout system including a grid dispenser mounted on a boom of a continuous miner for movement with a cutting drum to cut a passageway in a rock face. A roll of grid material, such as integral biaxially oriented geogrid, is fed from the dispenser an... | 10/06/1998 |
| 5685669 | Mining roof support A roof support having a stabilizing-guiding system for two spaced articulated quadrilateral linkages joined by a spacer element. The stabilizing-guiding system includes two coordinating links respectively, pivotably connected at one of the ends thereof to... | 11/11/1997 |
| 5584611 | Roof support for underground excavations The present invention is directed to a movable load support used for supporting the roof in underground excavations. The load support includes a primary roof support carried on a base frame and an auxiliary roof support also carried on said base frame but... | 12/17/1996 |
| 5567018 | Continuous mining linear advance system A continuous mining linear advance system comprises a dual action drum cutter for removing coal from a face of the entry. The dual action drum cutter removes the coal from the face by shearing across the face in a direction transverse to the direction of ... | 10/22/1996 |
| 5564866 | Reusable mine and underground roof, floor, and rib support system A reusable mine and underground roof, floor and rib support system including a horizontal chamber or entry and a tail assembly. The horizontal chamber is composed of individual pieces assembled to form sections of the horizontal chamber which can easily b... | 10/15/1996 |
| 5454669 | Yield valve A yield valve comprises a valve body, a first inlet port, an outlet port, a valve seat, and a valve member movable between a first position in which it cooperates with the valve seat to prevent fluid communication between the inlet port and the outlet por... | 10/03/1995 |
| 5423638 | Mine roof supports A mine roof support having means for monitoring the angles made by the canopy 11 and the base 10 with respect to a datum. The angular information may be gathered in a number of different ways and the information used to control subsequent movements of the... | 06/13/1995 |
| 5312206 | High lift temporary roof support for mines A temporary support for a mine roof is mounted on a mobile roof bolter, and includes a main support frame pivotably connected to the bolter, a main support beam and a ground contacting beam, both extending along the same axis in front of the main support ... | 05/17/1994 |
| 5306099 | Mine tunnel support system A mine tunnel support system of the type comprising spaced interconnected support sections is described. The support system is advanced along the tunnel in the forward direction in which mining is proceeding. Bolting machines may be carried on the support... | 04/26/1994 |
| 5284404 | Moving steel form system A travelling steel form system includes a three-dimentional framework mechanism with multiple faces crossing and coupling with one another. A set of form panels are fixed to the outer side of the framework mechanism on more than two faces thereof, and are... | 02/08/1994 |
| 5178494 | Roof support for underground excavations such as coal mines A roof support for the ceilings of excavated spaces underground and particularly for supporting caving edges for pillar recovery in coal mines is described. The roof support has a roof bar connected to a base frame by hydraulically extendable props and by... | 01/12/1993 |
| 5176474 | Mine tunnel support systems A mine tunnel support system of the type comprising spaced interconnected support sections is described. Each section includes at least one bearing member which, when the section is in the first, loaded state, bears against the roof of the tunnel. Drive m... | 01/05/1993 |
| 5156497 | Temporary roof support for mines A temporary support for a mine roof is mounted on a mobile roof bolter, and includes a main support frame pivotably connected to the bolter, a main support beam and a ground contacting beam, both extending along the same axis in front of the main support ... | 10/20/1992 |
| 5076749 | Material handling platform for material transport vehicle A material handling platform is pivotally attached to the front of the material transport vehicle. Actuator means raise and lower the platform. The platform is arranged to tilt relative to the vehicle about a horizontal pivot at the front of the vehicle. ... | 12/31/1991 |
| 5073067 | Mine roof support A mine roof support comprises a canopy, a base section, hydraulic props for raising and lowering the canopy relative to the base section, a hydraulic valve for supplying hydraulic fluid under pressure to the props via a check valve, and a yield valve conn... | 12/17/1991 |
| 5026218 | Temporary roof support cylinder A hydraulic temporary mine roof support cylinder is disclosed. The support cylinder includes an outer housing and a coaxial intermediate housing member and inner cylinder. A downwardly extending piston is provided between the outer housing and intermediat... | 06/25/1991 |
| 4995783 | Material handling platform for material transport vehicle A material handling platform is pivotally attached to the front of the material transport vehicle. Actuator means raise and lower the platform. The platform is arranged to tilt relative to the vehicle about a horizontal pivot at the front of the vehicle. ... | 02/26/1991 |
| 4978248 | Advanceable mine roof supports A roof support has a pair of floor sills carrying hydraulic props supporting a roof-engaging structure. The floor sills have guide rails on their adjacent sides which mate with a slidable guide block which connects to a shifting ram and thrust mechanism b... | 12/18/1990 |
| 4940363 | Mine roof support assembly A mine roof support assembly comprises a mine roof support having a first end adjacent to the mine face and a second end remote from the mine face, an advancing mechanism for advancing the roof support towards the mine face, and a base lifting mechanism. ... | 07/10/1990 |
| 4934758 | Appartaus for mounting ancillary equipment Apparatus for mounting ancillary equipment between two relatively movable members of, for example a mine roof support, comprises two substantially parallel arm members pivotally mounted between the two relatively movable members, two rotatable members sec... | 06/19/1990 |
| 4906133 | Mining apparatus for utilization in recovering coal A mining apparatus for utilization in recovering coal includes a series of four cooperating legs: a right fore leg, left fore leg, right rear leg and left rear leg. Each leg is formed from a box-like shield. An inflatable bag is provided in each leg. When... | 03/06/1990 |
| 4892446 | Group control means for hydraulic mine-roof supports An electro-hydraulic control system for self-advancing mine-roof supports in a high-output longwall mine is used to form a sequence zone behind the mining machine whereby individual supports simultaneously operate in the sequence of prop drawing, advancin... | 01/09/1990 |
| 4887935 | Method of controlling the movement of a longwall excavation front, especially the face or breast of a coal seam The advance of a mining front in longwall mining is effected by a process in which sensors measure the displacement of displacement cylinders coupling the linked prop elements to the linked conveyor elements with their respective cutters. A computer gener... | 12/19/1989 |
| 4828433 | Roof supports A roof support employs an hydraulic piston and cylinder unit as an adjustment device between the goaf shield and the roof-engaging structure. The cylinder unit is mounted to the shield with the aid of a bearing body defining a cup receiving a spherical en... | 05/09/1989 |
| 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 |
| 4812081 | Movable consolidating trestle for securing the excavating edge The movable consolidating trestle (2) has driven caterpillars (1). The consolidating trestle comprises a cap (3) being supported on the frame (11) via props (5). The cap (3) has at least one front-side section which is bent, rounded or bendable in directi... | 03/14/1989 |
| 4797023 | Mine roof supports A mine roof support has a roof engaging canopy 23, a floor engaging base 12, and a hydraulic jack 24 acting between the canopy and the base for urging the canopy and the base apart. The hydraulic jack 24 is provided with at least two different locations, ... | 01/10/1989 |
| 4784532 | Mine roof supports A roof engaging structure for a mine roof support comprises at least two relatively movable roof engaging members 21 and 23, which are coupled together by at least two spaced-apart pivotal joints 25 and 26. The pivotal joints combine to influence the rela... | 11/15/1988 |
| 4773795 | Roof cap assembly with supporting cylinders for roof support mechanism A roof cap assembly of a roof support mechanism includes a main cap having extension bearing portions at its front end, a forward cap which is pivotally attached at its rear end to the extension bearing portions of the main cap, and two supporting cylinde... | 09/27/1988 |
| 4755083 | Adjustable cap unit An adustable cap unit for a mine support frame including a main cap, an adjustable cap connected to the main cap with a hinge-type connection, an adjusting cylinder mechanism extending within the widths of the main cap and the adjustable cap, and a guide ... | 07/05/1988 |
| 4749311 | Foot element and cooperable strut element for use in a roof support mechanism A foot element of an adjustable roof support mechanism includes side walls that have aligned guide grooves in their facing surfaces and a spherical bearing surface in a floor portion therebetween. The guide grooves include inclined entry portions and enla... | 06/07/1988 |
| 4737051 | Mobile mine-roof support A mobile mine-roof support comprises a powered track-laying carriage having a carrier shaft extending longitudinally of the carriage between its tracks, the end portions of the carrier shaft being arranged to support mountings of bracket form for props su... | 04/12/1988 |
| 4732511 | Mine roof supports A mine roof support includes a pair of substantially-parallel floor-engaging members, a roof engageable member, a shield pivotally-connected to the floor-engaging members, by at least one pair of parallel links, and pivotally-connected to the roof-engagea... | 03/22/1988 |
