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| Number | Title | Issue Date |
| 7686542 | Method of protecting a surface of rock or soil The surface of rock or soil, newly-exposed, for example, by tunnelling, and having the tendency to become friable on exposure to the atmosphere, can be protected by forming thereon a film by the process of combining on the surface at least one coagulable material an... | 03/30/2010 |
| 7334644 | Method for forming a barrier A method for forming a barrier to seal off a remote chamber includes the steps of: forming a borehole that communicates between a first location and the remote chamber; inserting a conduit through the borehole to extend into the remote chamber; introducing a flowabl... | 02/26/2008 |
| 7267172 | Cemented open hole selective fracing system A cemented open hole selective fracing system is shown. In the producing zone, an open hole is drilled therein and a production tubing is cemented in place. At preselected locations along the production tubing, the production tubing will have sliding valves located ... | 09/11/2007 |
| 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 |
| 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 |
| 7217064 | Reinforcement of arch type structure with beveled/skewed ends A method for controlling deformation of a cut end region of an erected arch-type structure for use in underpass construction and the like where the cut end region has at least one extended leg portion. The method comprises building progressively at least one layer o... | 05/15/2007 |
| 7156582 | Inspectable tunnel for underground pipes and cables An inspectable tunnel comprises two opposite, vertical trays (1), whereof one is equipped with pallets (2) used to hold cables or conduits whilst the other has supports (26) whereon a plurality of hinged lids (15) can rest. The latter are... | 01/02/2007 |
| 7147402 | Submarine pipeline spoiler A method and apparatus for stabilizing and burying a conduit in a waterbed is disclosed. A plurality of spoilers are placed on the conduit at longitudinally and radially different positions to promote self-burial, reduce vortex-induced vibration, prevent upheaval bu... | 12/12/2006 |
| 7011581 | Gaming device having main game activating a bonus event A game and gaming apparatus include a main game and a bonus game. A player is entitled to participate in the bonus game without an additional wager beyond that required to play the main game. Winning outcomes of the main game determine the indicia used to play the b... | 03/14/2006 |
| 6973864 | Protective structure and protective system A protective structure for protecting buildings, bridges, roads and other areas from explosive devices such as car bombs and the like comprises: (a) a mesh structure having an outer surface and an inner surface, wherein the inner surface defines an annular space; (b... | 12/13/2005 |
| 6955502 | Method for repairing in-ground tunnel structures A method for repairing in-ground tunnel structure involves applying a first curable resin over a cementitious liner which lines the interior wall surfaces of the tunnel, drilling drainage holes in the cementitious liner, and filling the drainage holes with a second ... | 10/18/2005 |
| 6918447 | Fire protection apparatus and method A fire protection apparatus includes a plurality of bladders that are substantially filled with a non-flammable liquid via a manifold that is coupled to a source of non-flammable liquid and includes one or more nozzles that discharge the non-flammable liquid into ea... | 07/19/2005 |
| 6846132 | Mine stopping and braces therefor A mine stopping installed in a mine passageway includes a plurality of elongate panels extending generally vertically in side-by-side relation from a floor to a roof of the passageway to at least partially close the passageway. A generally horizontal elongate brace ... | 01/25/2005 |
| 6715961 | Method of supporting mine walls and installing a mine stopping A method of supporting opposite first and second walls of a mine passageway includes providing an elongate beam having opposite first and second ends and a longitudinal axis. The beam is configured to have substantial columnar strength for bearing a substantial long... | 04/06/2004 |
| 6697710 | Gas pipe explorer robot A gas pipe explorer formed of a plurality of connecting elements, and an articulation element between the connected elements. The connected elements include drive capabilities, and the articulation element allows the connected elements to traverse gas pip... | 02/24/2004 |
| 6688813 | Mine stopping and method of installing same A portable wall section for incorporation in a mine stopping or for use as a mine permanent stopping or seal form, comprising vertically extensible panels secured in side-by-side relation, a stopping installed in a mine, a stopping system utilizing one or... | 02/10/2004 |
| 6682263 | Multiple tier stopping and method of constructing stopping A mine stopping installed in a mine passageway includes a lower tier of elongate panels extending generally vertically in side-by-side relation from a floor of the passageway. Each panel of the lower tier has a lower end adjacent the floor and an upper en... | 01/27/2004 |
| 6619885 | Telescopic tunnel form The invention relates to a tunnel form comprising: two vertical forming walls (2) joined by a horizontal wall (3) in two parts (3A), and at the base of the form, means for adjusting the height of the position of the top edge (5) of the tunnel form relativ... | 09/16/2003 |
| 6594954 | Mine door installation A power mine door installation utilizing compressed air from the compressed air system available in the mine as the power source for a hydraulic door-operating mechanism.... | 07/22/2003 |
| 6474907 | Environmentally compatible archway for road building A floating link archway system which is useful for building access roads, such as logging roads and secondary roads in wilderness areas that include waterways such as streams and creeks, without causing significant adverse impact to sensitive environment.... | 11/05/2002 |
| 6457906 | Mine stopping A mine stopping installed in a mine passageway having air flowing through the passageway in a first direction includes a rigid wall extending across the passageway to close the passageway and an opening in the wall to permit the passage of air therethroug... | 10/01/2002 |
| 6406220 | Arched support structure A support structure and method for forming same for use in excavations such as underpasses, tunnels and the like for roads, rail or rivers. The support structure allows the utilization of the strength provided by using arch shaped sections and also minimi... | 06/18/2002 |
| 6402427 | Method for reinforcing tunnel linings The lining (1) of a tunnel is reinforced without reducing the tunnel bore. Grooves (6, 9) are cut into the tunnel lining (1) following the maximum curvature or skew to that, sometimes with one set of grooves crossing another set of different depth. Each g... | 06/11/2002 |
| 6379084 | Mine stopping A stopping system for use in mines. The stopping system includes a king post truss for reinforcing the stopping panels against excessive deflection due to a pressure differential across the stopping panels. The truss has a variable length to accommodate c... | 04/30/2002 |
| 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 |
| 6220785 | Mine stopping, method of constructing same and panels thereof A permanent mine stopping comprising two spaced-apart metal walls with a filling in the space therebetween keyed or adhesively bonded to the walls and having sufficient strength in tension to constitute the walls and the filling as a permanently integrate... | 04/24/2001 |
| 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 |
| 5962809 | Apparatus and method for protecting underground cables The subject underground cable assembly protection system of this invention relates to a plurality of rigid substantially impact-resistant elongate protective channel members. Each of these channel members defines an enclosed compartment for housing the ca... | 10/05/1999 |
| 5879231 | Mine ventilation structure A mine ventilation structure used to block a passageway or to prevent mixture of ventilation air at the intersection of two passageways. The passageway has sidewalls and a ceiling. The ventilation structure is formed of panels, each of the panels having s... | 03/09/1999 |
| 5803665 | Method and apparatus for continuous production of quick-setting foamed cement grout with selectively adjustable proportions A method and apparatus for continuous production of a quick-setting foamed cement grout, in which the individual constituents of the grout are proportionally adjustable. Finished foam and cement slurry are mixed at metered rates to form a foamed cement gr... | 09/08/1998 |
| 5725327 | Permanent mine bulkhead seal and method for constructing same A water-resistant mine bulkhead or seal is provided in which two walls are constructed across the mine entry. One of the walls is constructed in layers. After a lower portion of the layered wall is erected, a first layer of gravel is provided between the ... | 03/10/1998 |
| 5556676 | Tunnel interior construction An element for lining the interior surface of a tunnel, which comprises a composite panel in which a fibrous layer is laminated over a hard substrate, and a fluoropolymer surface layer is laminated over said fibrous glass layer.... | 09/17/1996 |
| 5540522 | Seismic joint for underwater floating tunnels This invention provides a seismic joint for an underwater floating tunnel having: (a) a joint portion (i) having a transverse section essentially the same as that of the tunnel, (ii) being rigidly fastened to land at one end (A) thereof, and (iii) being e... | 07/30/1996 |
| 5469920 | Inflatable partition for fighting mine fires The seal is a lightweight, inflatable, bag which may be inflated by a portable air generator and is used to seal a burning mine passage. A collapsible tube-like aperture extends through the seal and allows passage of high expansion foam through the seal i... | 11/28/1995 |
| 5412916 | Structure having quick-connect components A structure including at least two generally parallel, spaced-apart side walls, and a plurality of roof panels extending between the side walls for forming the roof of the structure. Each roof panel has opposite ends overlying the upper ends of respective... | 05/09/1995 |
| 5401120 | Pumpable mine seal A pumpable mine assembly is provided having a pair of steel support structures forming the front and back surface of the seal. The support structures can be formed by either a row of vertically-disposed steel beams or a cable lattice secured by anchor bol... | 03/28/1995 |
| 5351353 | Bridge or tunnel construction A bridge or tunnel construction consisting of one or more arch units (10), each unit formed from a pair of reinforced concrete arch segments (11 and 12) interconnected to form the crown of the arch unit with the arch unit or units being overlaid with a co... | 10/04/1994 |
| 5240349 | Power mine door system A power mine door system including a door frame to be installed in a mine passageway to define a generally rectangular doorway. A mine door is defined by a pair of generally rectangular door leafs which are hinged on the door frame at opposite sides of th... | 08/31/1993 |
| 5222838 | Power mine door system A mine door system including a door frame to be installed in a mine passageway to define a generally rectangular doorway. A mine door is defined by a pair of generally rectangular door leafs which are hinged on the door frame at opposite sides of the door... | 06/29/1993 |
| 5199817 | Process of providing an elongate underground cavity In the provision of elongate underground cavities having a large volume are to be provided, particularly in the construction of underground railroad stations having at least two stories, it is desired to avoid a need for excavating an open pit and to mini... | 04/06/1993 |
