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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...
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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...
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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...
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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...
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5039257 |
Mine roof supports
Mine roof support comprising a base including a pair of skids, a roof engaging canopy, jacks acting between the base and the canopy, an auxiliary jack connected to the base for lifting or lowering...
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5033913 |
Mine roof support
A mine roof support comprises a ground engageable base section, a canopy, a shield section pivotally connected at one end to one end of the canopy and at the other end to one or more members...
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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...
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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...
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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....
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4701079 |
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 goaf shield and are...
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4607986 |
Shield supports suitable for use in mines
A shield support, suitable for use in mines, comprising a floor-engaging structure which includes two sledge or like elements disposed side-by-side and spaced apart one from the other, a...
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4586851 |
Levelling ram for roof-shield mine support systems
In a roof-shield support system employed in mines, at least two levelling rams each acting between a shield frame unit and an associated gap-seal plate, the latter being arranged so as to be...
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4563111 |
Mine roof supports
A mine roof support has a roof engaging structure 13 and a floor engaging base 14, spaced apart by extensible hydraulic jack means 15 and 16. The roof engaging structure and the base are...
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4560306 |
Coal face support
A mine roof support comprises a base formed of two base members, a beam disposed therebetween, jacks for lifting the base members or the beam one relative to the other and a jack for advancing the...
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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...
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4480946 |
Gob canopy for a mine roof support
A support for the roof in longwall mining operations includes a gob canopy at the rear of a roof canopy. The gob canopy can move about a vertical pivot and a horizontal pivot by operation of a...
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4462637 |
Control apparatus for inclination of longwall guide
Apparatus for controlling the cutting horizon of a mineral winning plough comprises means for pivoting the guide along which the plough moves. The guide is fixed to the face side of the conveyor,...
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4382722 |
Nine lining structure
The roof support according to the invention is between the roof-bar (2) and the sill piece (1) with at least one system of levers (3,4) connected by articulation with each other and connected by...
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4352602 |
Roof support for a mine gallery which extends at a relatively large angle inclined to the horizontal
A roof support for a mine gallery which extends at a relatively large angle to the horizontal comprises an upper, a middle and a lower roof support unit arranged adjacent each other and having each...
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4315386 |
Portal building structures
A portal building frame formed of asymmetrical metal sections comprises a roof frame member supported on columns by means of knee connectors which telescopically engage with the roof frame member...
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4293247 |
Seals for mine roof supports
A mine roof support has a roof-engaging frame structure supported by hydraulic props on a floor frame and pivotably linked to a goaf shield. The roof frame and goaf shield have L-shaped seal plates...
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4236850 |
Shield timbering frame for timbering mines
A shield timbering frame for timbering mines adjacent a mining face, comprises a horizontal floor-engaging skid and a breaking shield extending obliquely over the skid which is connected to the...
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4231684 |
Shield type support for use in underground mining with lemniscate guide rods
A shield type support for use in underground mining comprises a floor construction with one or more pressure operated extensible and retractable rams mounted on the floor and connected at their...
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4222686 |
Mine roof support
In a mine roof support in which a roof shield, pressed by hydraulically operated, collapsable and extensible props, arranged between the roof shield and a sole plate, against the roof of a mine...
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4183701 |
Coupling gear for lemniscate shield timbering frame
A coupling gear for connecting two side-by-side, longitudinally extending shiftable skids of a divided footwall skid of a lemniscate shield timbering frame for actuation by a fluid pressure...
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4136999 |
Canopy and shield structure for a supporting shield in a seam-like mine deposit
A canopy and shield structure for supporting a shield adjacent a working face in a seam-like mine deposit, comprises a floor skid which is connected through an extensible and contractable prop at...
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4085592 |
Shield tubbing for longwalls
A shield tubbing for longwalls comprises a support tub and a break shield is pivotally mounted on said support tub. A double arm balance beam is pivotally supported on said tub and it includes a...
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4077223 |
Roof support shield structure for use in an excavation
A roof-support shield structure for use in an excavation to support and shield a roof above a floor of an excavation, such as a coal mine, comprises a sill beam adapted to be supported on the...
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4048804 |
Support assemblies for use in mine workings
A mine support assembly is composed of separate floor-engaging sills each supporting one or more telescopic props and a goaf shield pivotably connected to a roof cap. The props can be extended or...
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4020640 |
Shield structure
The invention relates to a shield structure particularly adapted for longwall mining providing a protected area that effectively insures operator safety even if total collapse of the mine roof...
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3921409 |
Support for the roof of an excavation
A base has one side facing towards and another side facing away from the face of an excavation. A shield has an end portion that is pivoted to the base in the region of the other side thereof, and...
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3903703 |
Self-advancing mine roof supports
A self-advancing mine roof support has a first or main roof supporting member and a second roof supporting member movable relatively to said first roof supporting member in the direction of advance...
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3902325 |
Shield structure for the face support in mines
A mine roof shield and support structure which has a base and a shield, a rocking cap, and a hinged cap supported from the base. The hinged cap and the rocking cap can be independently shifted into...
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3898845 |
Mineral mining installations
A mineral mining installation with telescopic props disposed between a floor beam or frame and a goaf shield. A support linkage is articulated between the shield and the floor beam. The shield...
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3896626 |
Mine lining and conveyor combination
The roof of an underground excavation is supported by a lining, and a conveyor extending along the mine face is reinforced at least in a section facing away from the mine face and supporting at...
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3877234 |
ADVANCEABLE SHIELD SUPPORT
An advanceable shield support apparatus suitable for use in long-wall mine workings using peeling techniques. The apparatus comprises a bottom sill, an overhead fall shield which is articulated to...
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3874178 |
Support for mine roofs and the like
A base has a side which is to face the mine face and another side which is to be remote therefrom. An upwardly inclined shield is connected at one edge region to the other side of the base for...
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3854293 |
LINING FOR UNDERGROUND EXCAVATIONS
A lining for underground excavations comprises a floor base, a shield, a roof cap for supporting the mine roof, a pit prop for engaging the floor base and the shield and pushing the roof cap into...
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3837170 |
SEALING AND POSITION RECTIFYING MECHANISM FOR SHIELD SUPPORTS
A shielding and breaking unit for long wall working in coal mines, comprises a plurality of endwise aligned units having interconnected base plates and shielding and breaking units that are...
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3779023 |
SHIELD ROOF SUPPORT
A shield roof support has a sole plate, at least one roof or heel plate and a hydraulic element supporting the roof plate from the sole plate. The hydraulic supporting element includes a...
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3672174 |
METHOD AND APPARATUS FOR SUPPORTING THE ROOFS IN UNDERGROUND EXCAVATIONS
A walking mine roof support wherein one or more roof engaging caps are pivotable on the upper end of at least one extendable pit prop which is mounted on the floor engaging base. Balancing rams...
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3441317 |
ROOF SUPPORTING ARRANGEMENT INCLUDING CANTILEVERED ROOF BAR CARRYING EXTENSIBLE ROOF SUPPORTING CAP AND CUTTER MEANS
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3437010 |
MINE ROOF SUPPORT MEANS
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