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| Number | Title | Issue Date |
| 8092121 | Free standing support A load support includes an outer tube and a plunger at least partially slidably disposed within the outer tube. Gravity-set wedging members are disposed between an outer surface of the plunger and an inner surface of the outer tube for setting the plunger and outer ... | 01/10/2012 |
| 8021083 | Grout pack assembly The invention provides a grout pack assembly having a plurality of elongate elements shaped to extend about a grout pack and which are characterized in that they are configured to control circumferential expansion of the grout pack beyond the expansion permitted thr... | 09/20/2011 |
| 7914238 | Free standing support A load support includes an outer tube and a plunger at least partially slidably disposed within the outer tube. Gravity-set wedging members are disposed between an outer surface of the plunger and an inner surface of the outer tube for setting the plunger and outer ... | 03/29/2011 |
| 7909542 | Mine support A mine support having a ductile metal sleeve, an interior of which is filled with a first aerated cementitious material of a first density which extends over at least 60% of the axial length of the sleeve. The interior of the sleeve is also filled with a second aera... | 03/22/2011 |
| 7789593 | Grout pack restraining system The invention provides a grout pack restraining system, comprising a plurality of elongate elements shaped to extend about a grout pack and which are characterized in that they are configured to control circumferential expansion of the grout pack beyond the expansio... | 09/07/2010 |
| 7654777 | Grout pack restraining system The invention provides a grout pack restraining system, comprising a plurality of elongate elements shaped to extend about a grout pack and which are characterized in that they are configured to control circumferential expansion of the grout pack beyond the expansio... | 02/02/2010 |
| 7445408 | Yieldable prop having a restraint arrangement A yieldable prop having a hollow first conduit having a first end and an opposite second end, the first end having a conical-shaped interior surface, with interior diameter decreasing as distance from the second end of the first conduit decreases; a sec... | 11/04/2008 |
| 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 |
| 7390147 | 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... | 06/24/2008 |
| 7360971 | Yieldable prop A yieldable prop having a first end and a second end including a first hollow conduit, a second conduit slidably received in the first hollow conduit, a clamp assembly positioned adjacent to the first hollow conduit and the second conduit, and at least one handle co... | 04/22/2008 |
| 7334968 | Yieldable prop A yieldable prop having a first end and a second end including a first hollow conduit, a second conduit slidably received in the first hollow conduit, a clamp assembly positioned adjacent to the first hollow conduit and the second conduit, and at least one handle co... | 02/26/2008 |
| 7324007 | Instrumented rock bolt, data logger and user interface system A rock bolt includes a hollow body and a gap along a length of the hollow body. At least one strain gauge is affixed to an inner surface of the rock bolt and is accessible from the gap. The rock bolt may include a data logger within the hollow body and coupled to re... | 01/29/2008 |
| 7281590 | Environmentally friendly method for generating energy from natural gas The invention relates to an environmentally friendly method for generating energy from natural gas. Through the combustion of the natural gas with a mixture comprising substantially oxygen and CO2, a number of advantages are achieved with regard to the em... | 10/16/2007 |
| 7267505 | Mine ventilation panel system A panel system for making mine ventilation structures. The panel system comprises a plurality of elongate metal panels having flanges along sides thereof configured for overlapping one another when the panels are placed in side-by-side relation. When the panels are ... | 09/11/2007 |
| 7261494 | Truss shoe A truss shoe for a roof support system includes a base member having a bearing surface and, optionally, an end having a sweeping radius for ease of moving the truss shoe into an installation position, a bolt receiving section having a bore hole, a cable engaging sec... | 08/28/2007 |
| 7232368 | Mine ventilation A mine air crossing includes opposite side walls and a deck extending from side wall to side wall. Each side wall includes a plurality of sections assembled side-by-side and interconnected by quick-connections. Similarly, each deck may include deck sections assemble... | 06/19/2007 |
| 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 |
| 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 |
| 7179020 | Mine roof bolt anchoring system and method An improved mine roof bolt is disclosed. The mine roof bolt comprises a bolt portion having a threaded end, a slidable camming nut, a stop, and an expansion shell having a central threaded nut with wedge fingers extending from it. The camming nut is fitted into the ... | 02/20/2007 |
| 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 |
| 7118310 | Truss shoe for a mine roof and method A truss shoe for use on a mine roof truss having at least one inclined bolt and at least one horizontal cross member comprises a base including a first end, a second end, a first side and a second side extending between the first and second ends, a generally planar ... | 10/10/2006 |
| 7114888 | Yieldable prop A yieldable prop having a first end and a second end including a first hollow conduit, a second conduit slidably received in the first hollow conduit, a clamp assembly positioned adjacent to the first hollow conduit and the second conduit, a ring positioned around t... | 10/03/2006 |
| 7097389 | Forklift movable cribbing column A prefabricated cribbing column for supporting a mine roof. The column includes a plurality of concrete cribbing elements the majority of which are interleaved with load transfer disks. Two of the cribbing elements are interleaved with a handle element. The column a... | 08/29/2006 |
| 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 |
| 7066688 | Wedge barrel for a twin cable mine roof bolt A twin cable mine roof bolt includes a barrel having a first end, a generally dome-shaped second end, and an outer surface, a pair of angled and narrowing bores extending through the barrel, with each bore sized to receive a cable, a pair of wedges sized for placeme... | 06/27/2006 |
| 7044688 | Roof bolts for use in mines, a method for their production and method for their installation A roof bolt comprises a shaft for insertion in a hole drilled in a mine roof and a head whereby the bolt may be rotated, the head being offset with respect to the longitudinal axis of the shaft so that when the bolt is rotated by means of its head the shaft is cause... | 05/16/2006 |
| 7032686 | Drilling and bolting head for a bolting machine The drilling and bolting head (7) of compact structure, is designed for use in mine galleries of small height. It comprises: a transverse table (8) connected to the carrying vehicle, preferably with a device (9 to 12) for lifting this tab... | 04/25/2006 |
| 7004040 | Support structure for a load-bearing device A mechanism for reducing horizontal force in load measurement is presented. The mechanism includes a structure having surfaces of nonuniform radii of curvature (e.g., oblate spheroid surfaces) at both ends. The ends of the structure contact a force-sensor coupling e... | 02/28/2006 |
| 6994496 | Roof bolts for use in mines, a method for their production and a method for their installation The invention comprises a roof bolt and nut in screw threaded engagement, said bolt comprising a shaft for insertion in a hole drilled in a mine roof and a threaded portion engaged by the nut whereby the bolt may be rotated. The nut is offset with respect to the lon... | 02/07/2006 |
| 6986495 | Walkway bracket for use with helical anchor A bracket for connecting to and supporting a beam of a walkway releasably attaches to a helical anchor. The bracket includes a beam restrainer for supporting a beam and a connecting plate releasably attached to a connector assembly. The connector assembly releasably... | 01/17/2006 |
| 6986623 | Method and apparatus for anchoring a mine roof bolt An improved mine roof bolt is disclosed. The mine roof bolt comprises a bolt portion having a camming nut rigidly fixed to it and a threaded end and an expansion shell having a central threaded nut with wedge fingers extending from it. The expansion shell is threade... | 01/17/2006 |
| 6966610 | Treatment of rock surfaces A method for providing a protective coating in a mine comprising spraying onto the rock surfaces of the mine a hot melt adhesive in an amount to form a coating at least 1 mm, preferably at least 2 mm in thickness and allowing the coating to solidify. The hot melt ad... | 11/22/2005 |
| 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 |
| 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 |
| 6942429 | Post-stressed pile A structural pile assembly includes a driven pile and pressurized grout contained beneath the pile so as to exert an upward force on the pile. An enclosure, such as a bladder or bellows, is filled with grout from a reservoir via a conduit which preferably extends ax... | 09/13/2005 |
| 6921232 | Mine roof-support truss A truss has a pair of parallel and longitudinally extending chord rods and transverse rods interconnecting the chord rods. First and second slides each have a pair of tubes each fitting over a respective one of the chord rods and slidable longitudinally therealong a... | 07/26/2005 |
| 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 |
| 6884005 | Roof support truss Mine strata roof support components and truss comprising a mine roof support bracket with a roof bolt sleeve, a tie rod channel and a tool mount, the tool mount being coaxial with the roof bolt sleeve. These components permit the construction of a truss which can be... | 04/26/2005 |
| 6863476 | Mobile system for manufacturing and installing reinforcing members A mobile system for manufacturing and installing rock reinforcing members in mining and tunnel construction applications where a plurality of holes are drilled into the rock and each hole receives a reinforcing member and grout. The reinforcing member can be steel s... | 03/08/2005 |
