| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 405259300 | Expandable tube | 24 |
| 20090016823 | Device and Method for Installing a Rock Bolt and a Rock Bolt Installation Rig | 01-15-2009 |
| 20090035071 | Friction tube anchor and inflation adapter for the latter - A friction tube anchor has a tube ( | 02-05-2009 |
| 20090041550 | Expansion bail anchor and method - An expansion anchor assembly for a mine roof bolt having a tapered plug, expansion leaves, a bail and a removable holding ring configured to hold the expansion anchor assembly in an assembled position is disclosed. The tapered plug is configured to be threaded onto the mine roof bolt and defines plug channels to encourage symmetrical resin flow past the tapered plug. The bail defines a medial opening through which the mine roof bolt extends. | 02-12-2009 |
| 20090220309 | 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 passage is provided to allow fluid to be passed to the drill tip and in one form a central passage is formed in the shaft to form part of this circulation passage. The anchoring device is operative to retain the bolt when located in a drilled hole and comprises a mandrel having one or more inclined external surface mounted to, or integrally formed with, the shaft and at least one expansion element overlaying the mandrel. The expansion element(s) is displaced radially outwardly on a predetermined relative movement between the mandrel and the element. | 09-03-2009 |
| 20100074695 | Fluid recovery - After a rock anchor which encompasses the anchor bolt, has been inserted with an end sleeve beforehand into a bore hole, on the sleeve there is an adapter with liquid supply and drain. Via the holding pressure line a holding pressure is produced which fixes the adapter on the sleeve. Via the expansion line fluid flows into the anchor bolt and begins to fill it. The anchor bolt expands as a result of the pressure increase in the bore hole, so that its outer surface adjoins the bore hole wall and fixes the rock anchor in the bore hole. Via a gas supply connected to the adapter, a pressurized gas, before and/or after expanding the anchor bolt, can be introduced into the latter. The compressed gas is relieved after removing the adapter and routs the fluid located in the anchor bolt almost completely out of the anchor. | 03-25-2010 |
| 20100260557 | ROCK ANCHOR - The invention relates to a rock anchor including an elongate, hydraulically inflatable anchor tube made of a ductile material and defining a closed leading end, a trailing end, and a tube cavity extending between the ends. The rock anchor of the invention includes an end cap on a trailing end of the tube, defining a feed aperture in communication with the tube cavity for pressure feeding a liquid substance into the tube cavity for inflating the tube. The end cap includes pressure indicator means configured for indicating when, as a result of pressure feeding of a liquid substance into the tube cavity, a predetermined installation pressure is reached in the tube cavity. The pressure indicator means typically includes a pressure indicator formation displaceable under pressure in the tube cavity, with such displacement being visible from the outside of the end cap. | 10-14-2010 |
| 20100278593 | 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 between the expansion member and the support device. The expansion shell has a base ring for engaging the support device and fingers for engaging a peripheral edge of the tapered plug. The engagement between the base ring and the support device permits axial traverse movement of the support device relative to the expansion shell for tensioning the roof bolt. | 11-04-2010 |
| 20110274504 | FIXATION BAIL | 11-10-2011 |
| 20110299939 | Expandable Bolt With Shielded Tip - The present invention includes a rock bolt having a longitudinally expandable tube. The tube includes a longitudinally extending depression that defines a temporary enclosed longitudinal passageway. The rock bolt further includes a shielded distal end to prevent debris from entering the temporary enclosed longitudinal passageway. The distal end is shielded using a cover which may be a plug or a cap and may provide a rounded tip for the rock bolt. The plug may be spherical. The cap may be attached such that its proximal end abuts the distal end of the rock bolt, is inserted into the distal end of the rock bolt, or extends beyond the distal end and along the sidewall of the rock bolt. The present invention also includes a method of making such a rock bolt and a method of using such a rock bolt. | 12-08-2011 |
| 20110311315 | Friction Bolt Assembly - A friction bolt assembly ( | 12-22-2011 |
| 20120163924 | FRICTION BOLT - A friction bolt, for frictionally engaging the internal surface of a bore drilled into a rock face. The friction bolt comprises an elongate, generally circular tube which is expandable radially. The tube has a leading end and a trailing end. An expander mechanism is disposed within the tube for applying a load tending to expand at least a section of the tube radially. An elongate tendon is disposed longitudinally within the tube and in connection at or towards one end of the tendon with the expander mechanism and in connection at or towards an opposite end of the tendon with an anchor arrangement. The tendon is actuatable to expand the expander mechanism and to remain connected between the expander mechanism and the anchor arrangement while the expander mechanism is expanded. The expander mechanism comprises a pair of expander elements, a first of which is secured relative to the tube and a second of which is secured to the elongate tendon, actuation of the tendon being operable to cause relative movement between the first and second expander elements to cause the expander mechanism to expand. | 06-28-2012 |
| 20120308310 | FRICTION BOLT | 12-06-2012 |
| 20130115013 | CONSTANT-RESISTANCE LARGE-DEFORMATION ANCHOR ROD - A constant-resistance large-deformation anchor rod includes a rod body ( | 05-09-2013 |
| 20130129425 | Rock Bolt and an Anchoring Device - A rock bolt including an elongate shaft, and an anchoring device attached to the shaft having an expansion mechanism. The anchoring device is operable to expand radially relative to the lengthwise extent of the shaft to anchor the rock bolt within a bore drilled into a rock body. The anchoring device includes an annular band, which extends about the expansion mechanism to resist expansion of the mechanism. The band is arranged so it can enter the bore in which the bolt is to be anchored in position about the expansion mechanism and to maintain a resistance to expansion of the expansion mechanism at least until the expansion mechanism has substantially fully entered the bore. The band can be a polymeric material such as a heat shrink polymeric material in tight fitting engagement about the expansion mechanism so as to conform to the external shape of the expansion mechanism. | 05-23-2013 |
| 20130149042 | ROCK BOLT - A rock bolt includes an elongated tubular shank which has a defined outer diameter in which has a first end and a second end. A component is received on the first end of the elongate tubular shank and is fixed to the shank by welding. The component can be externally threaded and can be configured to be threadably engaged by a nut. | 06-13-2013 |
| 20130156510 | ROCK BOLT - A rock bolt includes an elongate tubular body with an internal bore. A filler material is insertable into the internal bore at one end of the elongated tubular body. The end of the tubular body is then deformed thereby using the filler material to seal the end of the bore. The filler material may be a non-metallic material, such as a tube of plastic. | 06-20-2013 |
| 20130202364 | ANCHOR AND METHOD OF INSTALLING ANCHOR - An anchor comprises an anchor bolt having a shaft and a bolt head, a spreading sleeve having spreading parts provided at a tip portion of a tubular body capable of being fitted on a tip portion of the shaft and a cone nut provided at its inner side a screw through hole to threadedly engage with the shaft. The shaft of the anchor bolt is composed of a thick shaft part connected to the bolt head, and a thin shaft part provided to be closer to the tip portion of the shaft. The thick shaft part is provided with a rupture portion reduced in diameter. The rupture portion is provided at a position spaced by a predetermined length from the step between the thick shaft part and the thin shaft part and ruptures if torque of a predetermined value acts on the bolt head. | 08-08-2013 |
| 20130294844 | ANCHORING DEVICE - This invention relates to an anchoring device and more particularly but not exclusively, to a rock anchor for use in a mining environment, and which combines the functionality of a split set and an attachment anchor. The anchoring device includes a tubular body having a longitudinal slot provided therein, and an elongate anchoring element locatable inside the tubular body. The anchoring element is displaceable between a retracted position in which an end of the anchoring element is located inside the tubular body, and a protruding position, in which at least part of the elongate element protrudes from the tubular element. | 11-07-2013 |
| 20130336725 | Rock Bolt - A rock bolt is for use in stabilizing a rock face. The rock bolt comprises a body having a plurality of elongate lobes spaced apart by substantially resilient channel means. The rock bolt is further configured to receive expansion means for urging the lobes outwardly to thereby expand the rock bolt for improving a communication with a bore hole in the rock face. Following expansion the expansion means may be removable, the expansion means can comprise any suitably sized hollow or solid bar expansion member. The configuration of the present invention also enables, subsequent to an initial expansion, the resilient channel means to provide a gripping force on any suitably sized member inserted into the internal space. This feature of the rock bolt allows for a mesh plate having an elongate portion to be securely and removably fitted to the rock bolt after the rock bolt has been expanded. | 12-19-2013 |
| 20140037388 | ROCK BOLT - The invention relates to a rock bolt to be installed into a borehole ( | 02-06-2014 |
| 20140119839 | EXPANDABLE MINE BOLT - The present invention concerns a tubular rock bolt ( | 05-01-2014 |
| 20140270983 | Anchor and anchoring system - A sleeve and a concentric shaft having head at one end with a rectangular plate through with the shaft interposed between the head and the adjacent end of the sleeve. The plate initially is substantially V-shape and has the apex substantially parallel to a minor axis of the plate so that movement of the sleeve along said shaft towards the head deforms the plate from the V-shape into a substantially plainer configuration with the ends of said plate on a major axis of the plate extending laterally beyond the head. The present invention also embraces a method of fixing the anchor in a bore hole with the ends of the plate in an undercut in the bore hole and filling the bore hole with resin while venting air via a passage extending from adjacent to a closed end of the bore hole through a suitable cover. | 09-18-2014 |
| 20150322785 | ROCK ANCHOR BOLT - In a rock anchor bolt a centering member includes an outlet hole for removing any leakage water flowing into a borehole. The rock anchor bolt includes a sealing device provided around the outer end of a tube to seal the borehole watertight as a tightening nut is being tightened, and an outlet tube provided in a casting space between the tube and a drawbar to carry out the leakage water as grouting paste is being injected, the inner end of which outlet tube extends to the vicinity of an expansion member and the outer end of the outlet tube extends out from the outlet hole of the centering member. The tube has one or more first casting holes at the outer end of the tube in the vicinity of the sealing device and one or more second casting holes at the inner end of the tube near the expansion member. | 11-12-2015 |
| 20150322786 | Expandable Bolt With Thrust Element - The present invention includes a rock bolt having a longitudinally expandable tube. The tube includes a longitudinally extending depression that defines a temporary enclosed longitudinal passageway. The rock bolt further includes a shielded distal end to prevent debris from entering the temporary enclosed longitudinal passageway. The distal end includes a thrust element that facilitates movement of loose material across the rock bolt as it is advanced in a borehole. The present invention also includes a method of making such a rock bolt and a method of using such a rock bolt. | 11-12-2015 |
