| Patents for E21D 20 - Setting anchoring-bolts (3,685) |
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| 06/20/1995 | CA1335937C Method for installing rock bolts |
| 06/01/1995 | DE4339846A1 Method of stabilising underground gallery arched roof |
| 05/30/1995 | US5419660 Bending and feeding apparatus for installing a cable into a preformed bore |
| 05/24/1995 | DE4339708A1 Multi-component hardenable material-contg. cartridge |
| 05/23/1995 | US5417521 Multiple cable rock anchor system |
| 05/13/1995 | CA2134518A1 Longwall mining roof control system |
| 05/11/1995 | CA2135354A1 Device for lifting and alignment of nets in rock reinforcement |
| 04/06/1995 | DE4333708A1 Prestressed ground anchor encased in a granulated material |
| 03/30/1995 | WO1995008695A1 Anchor bolt for stabilising rock strata |
| 03/30/1995 | CA2149871A1 Anchor bolt for stabilising rock strata |
| 03/14/1995 | US5397202 In a borehole |
| 03/08/1995 | CN1027827C Mining machine with roof bolting attachment |
| 03/07/1995 | CA1334704C Reaction-charge and multi-cavity cartridge and method for adhesive anchorage of attachment elements in an attachment base |
| 02/28/1995 | US5392869 Anchor bolt drilling and setting device |
| 02/23/1995 | WO1995005524A1 Multiple cable rock anchor system |
| 02/15/1995 | EP0638705A1 Anchor bolt fixing capsule |
| 02/01/1995 | CN2188651Y Anchoring-bolt prestressed oil cylinder |
| 01/03/1995 | US5378087 Mine roof support apparatus and method |
| 12/27/1994 | US5375947 Method of filling a borehole |
| 12/20/1994 | US5374140 Drillable ground support bolt |
| 12/14/1994 | CN2185325Y Self-drilling slurry filling type anchoring-bolt system |
| 12/07/1994 | CN2184784Y Anchor rod reclaiming machine |
| 11/16/1994 | CN1026606C Tunnel supporting method for driving tunnel underwell |
| 11/02/1994 | CN1094486A Anchor of composite form |
| 10/12/1994 | CN2179460Y Spiral anchoring-bolt machine |
| 10/04/1994 | US5352066 Mine roof/bolt anchor assembly and method of installation thereof |
| 10/04/1994 | US5352065 Rock bolting |
| 09/27/1994 | US5350024 Drill pipe |
| 09/15/1994 | WO1994020731A1 Anchor bolt fixing capsule |
| 09/14/1994 | CN2177095Y Device for reclaiming and reusing grouting elastic material |
| 08/30/1994 | CA1331705C Rock anchor |
| 08/24/1994 | EP0611891A1 Anchoring cartridge |
| 08/09/1994 | US5335736 Rock bolt system and method of rock bolting |
| 08/04/1994 | WO1994017283A1 Means for anchoring a rock bolt made of concrete steel in a drill hole |
| 07/06/1994 | CN1089011A Technique for control of floor lift in gallery |
| 06/23/1994 | DE4242668A1 Forming compression anchor with tensile member (5), anchor head, and compression body |
| 05/31/1994 | US5316414 Mine roof expansion anchor, tapered plug element used therein and method of installation |
| 05/18/1994 | EP0597217A1 Compound anchor |
| 05/11/1994 | WO1994009929A1 Method of securing an anchor with extrusion plastic molding in a solid wall substrate |
| 05/11/1994 | CN1086589A Anchor with extrusion plastic bonding |
| 03/31/1994 | DE4232290A1 Securing tunnel on foundation to prevent landslide - involves extrusion anchors in preset spacings, with injection carried out via anchor tubes |
| 03/29/1994 | CA1328045C Mine roof anchor having adjustable resin retaining washer |
| 03/17/1994 | WO1994005900A1 Rockbolt |
| 03/16/1994 | CN1083896A Gallery supporting method for underground free digging section in coal mine |
| 03/01/1994 | CA1327351C Drill hole filling method and apparatus |
| 02/22/1994 | US5288176 Yielding grout compactor for mine roof support fixture |
| 02/09/1994 | EP0582554A1 Method for consolidating soil and piercing bit for performing the method |
| 01/19/1994 | CN2153637Y Anchoring-bolt with pretightening force display ring |
| 12/28/1993 | US5273377 Roof bolt |
| 11/10/1993 | CN2145868Y Pneumatic long anchorage cable mounting plate |
| 10/27/1993 | CN2144712Y Tooth shape expansive plastic anchoring-bolt |
| 10/19/1993 | US5253964 Rockbolt anchoring head |
| 09/29/1993 | CN1076761A Vibration anchoring-bolt drill |
| 09/21/1993 | US5246313 Apparatus for forming long and short holes and setting rock bolts |
| 09/14/1993 | US5244314 For anchoring a bolt in a bore hole |
| 09/02/1993 | DE4211334C1 Rock anchor for insertion in poorly cohesive rock - comprises bore anchor producing hole and stabilising hole walling and injection anchor inserted with hardenable medium |
| 08/25/1993 | CN2140958Y Folding hydraulic anchoring bolt drill |
| 08/19/1993 | DE4201419C1 Rock anchor for location in rock with low cohesion factor - comprises outer bore anchor for making borehole and stabilising hole wall and injection anchor of hardenable material |
| 08/12/1993 | DE4202926A1 Flexible expanding tube for packing boreholes - comprises esp. flexible cross section and is covered with narrow mesh expanding wire netting |
| 08/03/1993 | US5232774 Anchor bolt-setting capsule |
| 08/03/1993 | US5232311 Roof control system |
| 07/24/1993 | CA2087923A1 Method of filling a borehole |
| 07/20/1993 | US5228913 Compositions which set in the presence of water, their use and method for producing molded articles from such compositions |
| 06/30/1993 | EP0548832A1 Anchoring device for the tensioning rod of an anchor made from fibre-laminate |
| 06/29/1993 | US5222835 Resin-mixing article for mine roof anchor |
| 06/23/1993 | CN1073501A Hydraulic expansion type anchor stock for preventing side roof-fall at working face |
| 06/22/1993 | CA2085843A1 Arrangement for anchoring a rod-shaped tension member of composite fiber material |
| 06/16/1993 | EP0546128A1 Injection pipe and process for setting a rock anchor. |
| 05/12/1993 | EP0540601A1 Rock bolt system and method of rock bolting |
| 05/12/1993 | EP0419482B1 Anchoring cartridge |
| 04/28/1993 | CN2130922Y All-plastic expansion solidification anchoring-bolt |
| 04/07/1993 | EP0535411A1 Adhesive cartridge for a connecting dowel and procedure for its manufacture |
| 04/01/1993 | WO1993004257A3 Drilling pipe |
| 03/31/1993 | EP0534197A1 Cartridge for chemical fixation engineering |
| 03/17/1993 | EP0532441A1 Method for consolidating tunnel walls, gallery walls, or the like, anchoring bolt for carrying out the method, and method for making such anchoring bolts |
| 03/11/1993 | EP0540601A4 Rock bolt system and method of rock bolting. |
| 02/18/1993 | WO1993004257A2 Drilling pipe |
| 02/18/1993 | CA2093138A1 Drill pipe |
| 01/26/1993 | US5181800 Mine roof anchor having adjustable resin retaining washer |
| 01/19/1993 | CA1312855C Gooseneck assembly for rock drill and method for inserting friction rock stabilizer |
| 01/14/1993 | DE4128154A1 Injektionsrohr und verfahren zum setzen eines gebirgsankers Injection tube and proceed to set a mountain ankers |
| 01/03/1993 | WO1993001363A1 Injection pipe and process for setting a rock anchor |
| 01/03/1993 | CA2090430A1 Injection tube and method for placing a ground anchor |
| 12/28/1992 | CA2072515A1 Expansion assembly |
| 12/16/1992 | CN2124998U Anchoring-bolt truss |
| 12/15/1992 | CA2070206A1 Drilling and bolting turret, with associated bolt magazine |
| 11/25/1992 | CN1019217B Anchor block inherent stress bearing working and testing device for anchor block pulling force and repetition inherent stress |
| 11/24/1992 | US5165825 Rock bolting device |
| 11/10/1992 | US5161296 Method of securing an anchor with extrusion plastic molding in a solid wall substrate |
| 10/27/1992 | CA2066990A1 Rock bolting |
| 10/23/1992 | CA2066531A1 Rockbolt anchoring head |
| 10/20/1992 | US5157072 Use of hardenable cycloaliphatic derivatives for borehole-filling masses |
| 10/01/1992 | DE4101370C1 Tensioning slim round reinforcing element in mountain bore-holes - includes forming and hardening resin reactive mixt. around element mixt. formed from separately stored hardener, etc. components |
| 09/10/1992 | DE4121833C1 Anchoring casing for attachment to e.g. rock - comprises outer tubular casing contg. liq. resin components and inner casing contg. granular filter and curing components |
| 07/14/1992 | US5129764 Device to feed reinforcement rods |
| 07/14/1992 | US5129470 Drill hole filling method and apparatus |
| 07/07/1992 | US5127769 Thrust bolting: roof bolt support apparatus |
| 06/10/1992 | EP0489700A1 Rock bolting device |
| 06/09/1992 | CA1302748C Anchoring unit for use in structures with internal open spaces |
| 06/04/1992 | CA2054954A1 Rock bolting device |