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| Number | Title | Issue Date |
| 8052352 | Mine support having a linearly moveable and/or pivoting end plate A mine support yieldable prop includes a threaded shaft rotatably mounted in an end of the prop to move into and out of the prop end to move a bearing plate toward or away from a mine roof, and/or a bearing plate pivotally mounted to the end of the prop to level the... | 11/08/2011 |
| 7717649 | Suspending hydraulic pillar A suspending hydraulic pillar includes an oil cylinder, a movable prop, a handle-valve body, a reset spring, a top cover, a bottom seat, a three-way valve, a position-limiting steel wire, and a guide ring. The handle-valve body is provided between a port of the oil ... | 05/18/2010 |
| 7704018 | Automated, low profile drilling/bolting module with automated stab jack A module and related methods of use in drilling a borehole in a face of a mine passage using a drilling element and installing a bolt in the borehole once formed. The module may include a bolt holder for holding a plurality of bolts and a drilling element holder for... | 04/27/2010 |
| 7503731 | Yieldable prop for roof and ground control The present invention is directed to a yieldable prop to resist a sagging roof or thrusting floor. The invention is directed to a support apparatus disposed between the floor and the roof. The apparatus comprises a load-bearing member having a length with an axis al... | 03/17/2009 |
| 7438506 | Jack for carrying and installing mine panels A jack includes a base, a guide extending from the base, and an extensible member having an extensible fit with the guide and extending from the guide to have a free end. A support is located at the free end of the extensible member. An actuator is capable of extend... | 10/21/2008 |
| 7377727 | Mining roof support cylinder corrosion protection apparatus and method A roof support for an underground mine which has a hydraulic cylinder positioned between a roof engaging support and a ground engaging base and has a flexible gas barrier or enclosure surrounding surfaces of said hydraulic cylinder which are subject to corrosion by ... | 05/27/2008 |
| 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 |
| 7255312 | Guard rail safety system A support post and safety fence assembly in which the post has a telescoping inner and outer tube and is supported on a threaded internal shaft coupled to a floor engaging end and ceiling engaging end preferably formed with claws that have a number of sharp penetrat... | 08/14/2007 |
| 7232103 | Load-bearing pressurized liquid column A load-bearing, pressurized-fluid column apparatus and method for supporting a load or mine ceiling with respect to a support surface or mine floor includes an elongated, flexible sleeve and bladder retain a substantially incompressible liquid. The sleeve and bladde... | 06/19/2007 |
| 7228787 | Method for joining the functional parts of hydraulic or pneumatic working devices, and joining connection Joining connections are presented for joining the functional parts of hydraulic or pneumatic operating devices the joining connections including a first part exhibiting an external wall section and a second part exhibiting an internal wall section, which are joined ... | 06/12/2007 |
| 7210874 | Flared energy absorbing system and method An energy absorbing system with one or more energy absorbing assemblies is provided to reduce or eliminate the severity of a collision between a moving motor vehicle and a roadside hazard. The energy absorbing system may be installed adjacent to a gore area and othe... | 05/01/2007 |
| 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 |
| 7191569 | Telescoping pier foundation A telescoping pier foundation system (100, 100a, 100b) comprises generally an outer shell preferably made of a tough material, such as, a suitable polymer or a metal alloy, having an internal cavity (12) for receiving cementitious ... | 03/20/2007 |
| 7174680 | Bearing brace apparatus The present invention is directed to a brace apparatus having a core member configured to absorb energy generated by seismic or other forces by undergoing plastic deformation. A buckling restraining assembly is included for maintaining the structural integrity of th... | 02/13/2007 |
| 7134810 | Yieldable prop having a yield section A yieldable prop having a first end and a second end includes a first hollow conduit, a second conduit slidably received in the first hollow conduit, and a clamp assembly positioned adjacent the juncture of the first hollow conduit and the second conduit. A yield se... | 11/14/2006 |
| 7101111 | Flared energy absorbing system and method An energy absorbing system with one or more energy absorbing assemblies is provided to reduce or eliminate the severity of a collision between a moving motor vehicle and a roadside hazard. The energy absorbing system may be installed adjacent to a gore area and othe... | 09/05/2006 |
| 7080959 | Adjustable scaffold shoring accessory A shoring device that utilizes an accessory assembly mounted to a vertical tubular member of a tubular scaffold assembly to receive a shoring member therethrough. With an adjustable threaded ring mounted over the threaded portion of said accessory assembly, a suppor... | 07/25/2006 |
| 6991407 | Lift cylinder assembly A lift cylinder arrangement is disclosed for a hydraulic support frame for underground mining. The support frame has a lift cylinder for lifting the base shoes during advancing, which is supported on the one hand on a return rod and on the other hand, in a pivoting ... | 01/31/2006 |
| 6957166 | Method and apparatus for load rate monitoring A system for real-time monitoring of the dynamic loading rate on support systems used in underground mines and other situations is provided. The load rate monitoring apparatus uses a programmable microcontroller to monitor and calculate the loading rates on the supp... | 10/18/2005 |
| 6941710 | Columnar jack concealing device The present invention provides a device for concealing and covering a columnar jack for columnar supports and a method of concealing a columnar jack using a columnar jack concealing kit. The device comprises a strap member, a skirt sized and shaped for covering the ... | 09/13/2005 |
| 6910834 | Mine prop A mine prop is comprised of an elongate tube having a slenderness ratio that would generally allow buckling or kneeling of the elongate tube when exposed to a sufficient axial force. A plurality of elongate support members having a length less than the elongate tube... | 06/28/2005 |
| 6395359 | Power cylinder non-metallic liner seal assembly Corrosion resistance is provided for a power cylinder by providing a preloaded molded urethane elastomer sleeve liner within an outer cylinder of material such as a copper/nickel alloy which is subject to corrosion from long-term exposure to ambient fluid... | 05/28/2002 |
| 6394707 | Yieldable mine roof support A mine roof support designed to extend vertically in a mine passageway. The support includes a containment structure having at least two telescoping containment members freely telescopically movable relative to one another, and a filler material introduci... | 05/28/2002 |
| 6334738 | Prefabricated metal overcast having a crushable lower section A ventilation overcast comprises a frame member that defines a structure having a substantially inverted U-shape with first and second opposed side wall portions and a roof portion. A curtain member having a plurality of longitudinal corrugations therein ... | 01/01/2002 |
| 6174110 | Shoring leg A shoring leg is provided with a latch for use in maintaining an end plate of the shoring leg and a jack collar in a predetermined position relative to each another. The latch comprises a latch member having a slot to receive a mounting bracket which moun... | 01/16/2001 |
| 6129483 | Prefabricated metal overcast having a crushable lower section A ventilation overcast may comprise a plurality of support columns, each of which has an upper end and a lower end. A plurality of cross beams are connected between the upper ends of each of the plurality of support columns so that the support columns and... | 10/10/2000 |
| 6056480 | Support for underground mining and tunnel construction There is a support for underground mining and tunnel construction, comprising an outer tube and an inner tube, which can be pushed into each other in a telescoping manner. A piston acted upon by a hydraulic pressure medium is located in the outer tube. Th... | 05/02/2000 |
| 5967702 | Quick-release pit prop A pit prop has two opposed ends and comprises two bearing plates located at the ends, two telescopically displaceable prop elements, a number of separate resiliently compressible rubber discs arranged adjacent each other and a tubular indicating element. ... | 10/19/1999 |
| 5961254 | Hydraulic advancing support frame An advancing support frame is connected to the face conveyor (9) via an advancing rod (7) engaging with the advancing cylinder (5). A lifting cylinder (10) is supported on the advancing rod (7), with which the base shoes (1) are lifted during the advancin... | 10/05/1999 |
| 5921718 | Prop for use in underground mining or tunnel construction An extending prop for underground and tunnel construction, comprising, an outer tube having a closed bottom end, an inner tube telescopically slidable in the outer tube and having a closed top end, and a mechanical locking device adapted to fix the relati... | 07/13/1999 |
| 5921714 | Device for releasing a screw jack mechanism A device for releasing of a frozen screw pressed against a contact surface uses a compression disc pre-loaded to an anticipated amount of deflection prior to mounting between the contact surface and the screw. The disc has an insert formed from a granulat... | 07/13/1999 |
| 5868527 | Mine props The invention concerns a mine prop which has a cutting device and a cuttable plunger. The cutting device has a sleeve and a cutter which is fixed to the sleeve and which presents cutting edges transverse to the sleeve axis and axially oriented openings be... | 02/09/1999 |
| 5823718 | Pillar bag A pillar bag which is made from a synthetic fabric which is folded, at vertically spaced intervals, to form a number of sheaths, with each sheath housing a reinforcing ring.... | 10/20/1998 |
| 5720581 | Support prop The support prop consists of an outer robe (12) with an open flared mouth (14) into which a plunger (16) projects. A deforming ring (18) in use engages the plunger and is initially located within the flared mouth of the outer tube. A chamber (26) is provi... | 02/24/1998 |
| 5611646 | Support prop with integrated pressure limiting valve and nailed pipes A compact support prop having a pressure limiting valve with a very high flow volume forming a prop head as a valve housing. The pressure limiting valve is integrated into the prop head. Thus, insertion speeds of more than 3 meters per second can be achie... | 03/18/1997 |
| 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 |
| 5564867 | Resilienty compressible support column for use in a mine An adjustable support column for use between ceiling and floor surfaces of a mine has an outer tube having an outer end braced against one of the surfaces and an inner end and an inner tube having an inner end in the outer tube at the inner end thereof an... | 10/15/1996 |
| 5538364 | Yieldable mine post having a double ball and socket configuration A primary mining post, prop, or support that is yieldable to the settling forces of a mine shaft and has a double ball and socket configuration to respond to the shifting that occurs with roof settling in mine shafts. The post has a ball on each end of th... | 07/23/1996 |
| 5413436 | Support column A support column for underground mining has a hollow lower column component and a hollow upper column component. The upper column component is slidingly mounted in the lower column component. The bottom of the upper column component is a plate member. The... | 05/09/1995 |
| 5400994 | Yieldable roof support system A support includes a base member having an open end and a hollow interior, a forcing member having an end extending through the open end of the base member into the hollow interior thereof and having threads thereon and a mandrel or sliding nut capable of... | 03/28/1995 |
