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| Number | Title | Issue Date |
| 8087850 | Rock bolt The present invention relates to rock bolts which may be used in mining applications. The rock bolt of this invention includes a mechanical anchoring arrangement to facilitate retaining the rock bolt in a borehole, and also a drill bit to enable self drilling of the... | 01/03/2012 |
| 8061935 | Rock bolt and an anchoring device The present invention relates to a rock bolt comprising first and second ends, a shaft extending between the ends, and an anchoring device extending along a first part of the shaft adjacent the first end. The anchoring device comprises a mandrel, and at least one ex... | 11/22/2011 |
| 7959379 | Bolt anchor A bolt anchor is comprised of a body and sleeve. The body is generally wedge shaped with a threaded bore along its axis and at least one stop near its smaller end. The sleeve has a round collar with leaves extending from the collar parallel to the axis of the collar... | 06/14/2011 |
| 7896580 | Self drilling rock bolt A self drilling rock bolt incorporating a shaft and an anchoring device. A first end of the bolt has a drill tip to penetrate rock and a second end is adapted to be connected to a drilling apparatus to allow rotation of, and thrust to, the bolt. A circulation passag... | 03/01/2011 |
| 7722295 | Expansion shell assembly An expansion shell assembly for mine roof bolts includes an expansion member threaded onto an associated mine roof bolt. A support device is annularly disposed around the associated roof bolt. An expansion shell is annularly disposed around the associated roof bolt ... | 05/25/2010 |
| 7374370 | Rock bolt anchor having concurrent chemical and mechanical anchoring means and method for using the same A rock bolt anchor includes a top portion permanently fixed to a bottom portion. The top portion carries a package of resin. A spring-loaded mechanism pressurizes the package and forces the resin out when the package is lanced. The bottom portion main body carries a... | 05/20/2008 |
| 7342175 | Electrical connector A splice electrical connector for connecting core members of two cable conductors to each other is provided. The connector include two end members. Each end member comprises a first coupler end and a second wedge contact end. A splice coupler connects the first coup... | 03/11/2008 |
| 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 |
| 7296950 | Point anchor coated mine roof bolt A resin bonded mine roof bolt having an elongated rod with a first end and a second end. A segmented resin compression layer covers a portion of the rod below the first end. When installed in a mine roof bore hole with curable resin, the resin compression layer mixe... | 11/20/2007 |
| 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 |
| 7147404 | Elongate element tensioning member An adjustable yield rock bolt that comprises an elongated tensile support member that interacts with at least one gouging member and a receiving member capable of receiving the elongated tensile support member and hold the gouging member segment there between, where... | 12/12/2006 |
| 7080697 | Method and device for drilling a hole and for securing an anchorage in a bore hole A method and a device for the drilling, in particular the percussive or percussive rotary drilling of a hole in earth or rock and for securing an anchorage in the hole. A bore hole is created by a drill bit mounted on a drill pipe and a sliding sleeve that surrounds... | 07/25/2006 |
| 7073982 | Point anchor coated mine roof bolt A resin bonded mine roof bolt having an elongated rod with a drive head at one end and an expansion anchor threaded onto the other end. A segmented resin compression layer covers a portion of the rod below the expansion anchor. When installed in a mine roof bore hol... | 07/11/2006 |
| 7073981 | Rock stabilizer A rock stabilizer includes a metal tube with a tapered distal end and a flanged proximal end capable of being positioned within a bore in a mine wall. A slit runs substantially the entire length and indentations are formed in the outer surface along the length adjac... | 07/11/2006 |
| 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 |
| 7033117 | Rock anchor A self-drilling rock anchor includes an anchor tube (2), a drill head (6) provided at the first end (5), an outer thread (8) provided at least in a region of the second, free end (7) of the anchor tube and an adapter (11) re... | 04/25/2006 |
| 7014408 | Method and apparatus for fastening steel framing with self-locking nails A harpoon nail having two or more sets of teeth on opposite sides of fingers that deform while penetrating the framing members. The teeth engage with a bottom surface to fasten the framing members together. A piercing nail having sets of teeth on two edges penetrate... | 03/21/2006 |
| 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 |
| 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 |
| 6984091 | Yielding rock bolt A yielding rock bolt arranged to be inserted into a hole in a rock surface. The rock bolt comprises a shaft having a widened portion adjacent a first end thereof, arranged, in use, adjacent an inner end of the hole. The rock bolt also includes an anchor member arran... | 01/10/2006 |
| 6935811 | Frictional mining bolt A system for mine roof reinforcement includes a bearing plate and a tubular member with an inner surface, an outer surface, first and second free ends, and an enlarged portion disposed proximate one of the free ends. The system also includes a projectile and an inse... | 08/30/2005 |
| 6932543 | Wedge assembly and internal anchorage using the same In an internal anchorage wedge assembly, a tension member is removed by the release of a wedge engagement corresponding to external anchoring of the tension member in imposing the anchoring load on the tension member anchored to an underground anchor hole. Moreover,... | 08/23/2005 |
| 6929424 | Rock bolt and method of use A rock bolt comprising an elongated bar and an elongated deformable member, with a threaded nut to reduce the distance between the respective ends of the deformable member so as to deform at least part of the member away from the bar. The threaded nut may be located... | 08/16/2005 |
| 6908258 | Methods and apparatus for maintaining seawalls Apparatus for maintaining a seawall disposed between a body of water and retained earth includes at least two anchoring devices installed on the seawall at spaced locations and a connecting member for rigidly interconnecting the anchoring devices to maintain the sep... | 06/21/2005 |
| 6742966 | Expansion shell assembly An expansion shell assembly for mine roof bolts includes an expansion member threaded onto an associated mine roof bolt. A support device is annularly disposed around the associated roof bolt. An expansion shell is annularly disposed around the associated roof bolt ... | 06/01/2004 |
| 6626610 | Cable bolt apparatus and method of installation for mines Cable bolt wedge barrel, installation apparatus and method, for cable bolt installation in a mine borehole provided an interior resin system, wherein the wedge barrel of the cable bolt employed, and the tool used to revolve and supply thrust to the same, ... | 09/30/2003 |
| 6599059 | Three-prong shell An expansion assembly configured to be attached to a mine roof bolt, wherein the expansion assembly may include a plug defining an interior cavity and an outer surface and an expansion shell having a plurality of spaced-apart prongs, preferably three pron... | 07/29/2003 |
| 6533503 | Mortar composition, curable by frontal polymerization, and a method for fastening tie bars A mortar composition, curable by frontal polymerization after heat initiation, is described, wherein are contained a) at least one polymerizable monomer and/or at least one curable resin, b) at least one polymerization initiator, which can be activated an... | 03/18/2003 |
| 6474910 | Rockbolt assembly A rockbolt assembly for securement within a borehole generally comprising a rockbolt, an anchor, a hollow tube assembly, a faceplate and a nut. The rockbolt has a threaded free end and a second end associated with the anchor. The hollow tube assembly has ... | 11/05/2002 |
| 6457910 | Tubular anchor A tubular anchor includes a tubular member (1, 21) with a drilling head (2, 22) at one of its end, a load application element (3) extending along a portion of the tubular member opposite the one end, opening (5, 23) provided in a region of the drilling he... | 10/01/2002 |
| 6146055 | Mine roof bolt anchor An anchor for a mine roof bolt incorporates a single large rib at the top of a segmented shell. This single large rib is forced into the wall of the bore hole by the downward movement of an associated threaded camming nut during the first few revolutions ... | 11/14/2000 |
| 5885031 | Mine roof bolt anchor An anchor for a mine roof bolt incorporates a single large rib at the top of a segmented shell. This single large rib is forced into the wall of the bore hole by the downward movement of an associated threaded camming nut during the first few revolutions ... | 03/23/1999 |
| 5743061 | Wall anchor A wall anchor having a first inclined plane secured to a second inclined plane by a connector. The connector is resilient to allow the inclined planes to move relative to one another. The inclined planes are oriented opposite one another, in a manner whic... | 04/28/1998 |
| 5647694 | Mine roof support apparatus and method The present invention pertains to a mining support for supporting rock within a mine. The support includes a cable and a threaded shaft fixedly attached to a first end of the cable. There is also an expansion anchor threadingly engaged about the threaded ... | 07/15/1997 |
| 5599140 | Mine roof support system including an expansion anchor with means assisting resin component mixing and method of installation thereof A reinforcing and support system and method of installation thereof including both a mechanical expansion anchor on the distal end of an elongated bolt and a resin grouting mix installed in a blind drill hole in a mine roof, or the like. A pair of elongat... | 02/04/1997 |
| 5596854 | Post-tensioning anchor head assembly An anchor head assembly comprising a main body member with a plurality of cavities having the shape of a frustum of a cone in an exterior section and a corresponding number of cavities which may also have the shape of a frustum of a cone in an interior se... | 01/28/1997 |
| 5556233 | Rock anchor assembly A rock anchor includes an elongate element. A transverse dimension of a portion of the elongate element is enlarged. The transverse dimension is reducible on the application of a suitable force applied to the enlarged portion. The invention extends to a t... | 09/17/1996 |
| 5531545 | Cable bolt structure and method Cable bolt structure, related components and method for achieving desired ground control of mine roof strata in a dynamic manner; a sustained transverse enlargement, of particular design, of a portion of the cable bolt employed coacts with a tubular membe... | 07/02/1996 |
| 5525013 | Cable bolt structure and related components Cable bolt structure, related components and method related to the support, in active and passive modes, of mine roof strata for achieving desired ground control.... | 06/11/1996 |
| 5501551 | Mine roof expansion anchor, expansible shell element used therein and method of installation A mechanical expansion anchor and radially expansible shell for use therein having particular application in combination with resin grouting materials. The anchor includes a conventional, tapered camming plug moveable axially upon a mine roof bolt to move... | 03/26/1996 |
