| Patents for E21D 21 - Anchoring-bolts for roof, floor, or shaft-lining protection (4,377) |
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| 09/14/1982 | US4349299 Roof bolt tension head and method of use |
| 08/31/1982 | US4347020 Mine roof bolt assembly |
| 08/17/1982 | CA1129689A1 Ground anchors |
| 08/03/1982 | US4342527 Support assembly for underground mine and tunnel roofs |
| 07/27/1982 | US4341301 Adhesive securing of anchors in borehole |
| 07/13/1982 | CA1127433A1 Rock bolt and installation system |
| 06/22/1982 | CA1126058A1 Friction rock stabilizer and method for insertion thereof in an earth structure bore |
| 06/15/1982 | US4334805 Roof bolt and cradle arrangement |
| 06/15/1982 | US4334804 Friction rock stabilizer and method of installing same in an earth structure |
| 06/15/1982 | US4334803 Mine roof bolt |
| 05/04/1982 | US4327806 Offset driver accessory |
| 04/20/1982 | US4325657 Roof support pin |
| 03/30/1982 | US4322193 Tension gauge |
| 03/30/1982 | US4322183 Friction rock stabilizer and installation lubricating cement apparatus and method |
| 03/17/1982 | EP0047727A1 Method of rock bolting and a device comprising an expansible rock bolt and an installation device therefor |
| 03/09/1982 | US4318302 Method of determining mine roof stability |
| 02/23/1982 | US4316677 Tubular shank device |
| 02/09/1982 | US4314778 Friction rock stabilizer and method for inserting thereof in an earth structure bore |
| 02/02/1982 | US4313697 Mine roof support plate bolt |
| 02/02/1982 | US4313696 Friction rock stabilizer and method for insertion thereof in an earth structure bore |
| 02/02/1982 | US4313695 Earth structure stabilizing method, and a friction rock stabilizer and an axial extension therefor |
| 01/26/1982 | US4312611 Fastening element assembly with a spreading wedge |
| 01/26/1982 | US4312604 Friction rock stabilizer set, and a method of fixing a friction rock stabilizer in an earth structure bore |
| 01/20/1982 | EP0044272A2 Device for pressing a two-component adhesive into a pipe in order to produce a non-prestressed anchor |
| 01/12/1982 | US4310266 Friction rock stabilizer and method of inserting same in an earth structure bore |
| 01/05/1982 | US4308751 Method for investigating an anchored rod-like body having an accessible end, and apparatus for carrying out the method |
| 01/05/1982 | CA1115891A1 Cartridge for securing stay bars in bore holes |
| 12/30/1981 | EP0042573A2 Dowel for insulation panels |
| 12/29/1981 | US4307979 Mine roof bolt and end cap |
| 12/16/1981 | EP0041801A2 A capsule of grouting material and methods for the preparation and use thereof |
| 12/15/1981 | US4305687 Anchoring system for rock bolts |
| 12/01/1981 | US4303354 Mine roof bolting |
| 11/24/1981 | US4302131 Anchor elements |
| 11/17/1981 | US4300859 Dual diameter bushing/seal for mine roof bolt |
| 11/17/1981 | CA1112465A1 Method of anchoring elements and a device for carrying out said method |
| 11/10/1981 | US4299515 Rock reinforcement system |
| 10/20/1981 | US4295761 Post tensionable grouted anchor assembly |
| 10/20/1981 | US4295760 Rock bolt anchor |
| 10/06/1981 | US4293244 Pick arm anchor assembly |
| 09/29/1981 | US4291799 A rupturable package containing separately polyester and hardener for securing bolts in construction materials |
| 09/22/1981 | US4290516 Torque limiter |
| 09/22/1981 | US4290338 Straddle cartridge for a straddle cartridge anchor |
| 09/17/1981 | WO1981002605A1 Oblate friction rock stabilizer and installation lubricating cement utilized therewith |
| 09/15/1981 | US4289427 Process for installing roof bolts |
| 09/15/1981 | US4289426 Friction rock stabilizer and method of forming same, and a method of stabilizing an earth structure |
| 09/15/1981 | CA1109056A1 Attachment means for securing a rock bolt dolly to drill steel |
| 09/01/1981 | US4286482 Device for positioning anchorage means |
| 08/25/1981 | US4285993 Anti-corrosive structure anchor assembly |
| 08/19/1981 | EP0034134A1 Rock bolting apparatus |
| 08/18/1981 | US4284379 Earth structure stabilizer |
| 08/05/1981 | EP0033246A1 Capsules containing cementitious compositions |
| 08/04/1981 | CA1106196A1 Stabilization of rock formations |
| 07/28/1981 | US4280391 Arrangement for anchoring a mounting element in a support structure and mounting an object on the same |
| 07/21/1981 | US4279340 Two-component adhesive cartridge |
| 07/14/1981 | US4278363 Rock bolt and installation system |
| 07/07/1981 | CA1104389A1 Expansion shell assembly and method for combining resin bonding and mechanical anchoring of a bolt in a rock formation |
| 06/30/1981 | US4275975 Mine roof anchor system |
| 05/27/1981 | EP0029354A1 Anchoring of roof bolts |
| 05/05/1981 | US4265571 Cable sling for support and stabilization of underground openings |
| 04/28/1981 | US4263832 Adhesively secured anchor bolt |
| 04/07/1981 | US4260294 Friction rock stabilizer and method for inserting thereof in an earth structure bore |
| 03/05/1981 | WO1981000549A1 Resin-containing cartridges and process for sealing solid structures or for anchoring bolts and rods therein |
| 03/03/1981 | US4253566 Resin-containing cartridges and process for sealing solid structures or for anchoring bolts and rods therein |
| 02/24/1981 | US4252474 Stabilization of rock formations |
| 02/10/1981 | US4249835 Mine roof support plate |
| 01/27/1981 | US4247225 Alignment device |
| 01/27/1981 | US4247224 Method for installing a mine roof bolt |
| 01/27/1981 | US4247223 Rock bolt |
| 01/13/1981 | CA1093352A1 Cable rock anchor |
| 01/07/1981 | EP0021180A1 Process for the elimination and economical usage of the residue produced by washing furnace exhaust gas in connection with waste products |
| 01/06/1981 | US4242915 Extensometer anchor |
| 12/16/1980 | US4239105 Resin capsule for mining roof bolting systems |
| 12/10/1980 | EP0020271A1 Bolting device with linear positioning |
| 12/10/1980 | EP0020270A1 Device for preparing and setting bonding charges |
| 11/12/1980 | EP0018376A1 A method for investigating an anchored rod-like body having an accessible end, and apparatus for carrying out the method |
| 11/11/1980 | US4232984 Method of anchoring elements and a device for carrying out said method |
| 11/04/1980 | US4231683 Process and a device for making anchorages in soils and rocks |
| 11/04/1980 | CA1089051A1 Mine roof movement monitor |
| 10/15/1980 | EP0016901A1 Fixing element with an anchor bolt and a spacing wedge |
| 10/14/1980 | US4227612 Two-ply resin capsule for mining roof bolting systems |
| 10/01/1980 | EP0016742A1 Method of rock bolting and tube-formed expansion bolt |
| 09/17/1980 | EP0015895A1 Tension bolt for anchoring construction elements in a foundation body |
| 08/20/1980 | EP0014426A1 Rock anchor |
| 08/05/1980 | CA1082959A1 Method and apparatus for installing chemical anchor bolt assemblies in earth formations |
| 04/08/1980 | USRE30256 Friction rock stabilizers |
| 04/01/1980 | US4195952 Means for anchoring to rock |
| 03/25/1980 | US4194858 Mine roof bolt anchor installation |
| 03/25/1980 | CA1074092A1 Process for the consolidation of geological formations |
| 03/18/1980 | US4193715 Mine roof support method and apparatus |
| 03/18/1980 | US4193246 Clamping member for an adhesively secured anchor rod |
| 03/11/1980 | US4192631 Mine roof support method and apparatus |
| 03/04/1980 | CA1072787A2 Method and apparatus for supporting a mine roof |
| 02/19/1980 | CA1071910A1 Self-drilling dowel with drill head |
| 02/12/1980 | US4188158 Mine roof bolt hole seal |
| 02/05/1980 | US4187040 Mine roof bolt spike chemical dispenser assembly |
| 01/15/1980 | US4183699 Washer/gasket for mine roof bolt assembly |
| 01/09/1980 | EP0006703A1 Ground anchor, method of making a ground anchor and corrosion-proof sleeve for use in said method |
| 01/09/1980 | EP0006520A1 Tensioning ground and rock anchoring bolt |
| 01/09/1980 | EP0006515A1 Process for the anchoring of a tie rod |
| 12/27/1979 | WO1979001144A1 Anchoring cartridges |