| Patents for E21D 21 - Anchoring-bolts for roof, floor, or shaft-lining protection (4,377) |
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| 12/06/2001 | DE10110001A1 Nut for anchoring bolts in mine strata has first internally threaded section and second, deformable threaded section, forming discontinuity in first thread |
| 11/29/2001 | US20010046418 Rockbolt assembly |
| 11/27/2001 | US6322290 Cable bolt head |
| 11/22/2001 | WO2001088339A1 Method for setting anchoring bolts in mines |
| 11/22/2001 | CA2409071A1 Equipment for use in mines and method of use |
| 11/14/2001 | CN1322273A Jacket tube for drilling and anchoring device |
| 11/08/2001 | US20010038779 Cable bolt with a yielding fixture and method of forming the same |
| 10/30/2001 | US6309159 Self drilling roof bolt |
| 10/24/2001 | CN2455935Y Equal strength anchor rod |
| 10/18/2001 | WO2001077493A1 Rock bolt and method of manufacture and installation |
| 10/17/2001 | CN1317627A Bolt tube with mould surface |
| 10/17/2001 | CN1317626A Roofbolt |
| 10/17/2001 | CN1317624A Roofbolt |
| 10/11/2001 | WO2001012953A8 Anchor bolt and method of manufacturing the anchor bolt |
| 10/11/2001 | US20010028828 Tubular anchor |
| 10/11/2001 | DE10017763A1 Tube anchor for mining/tunneling has a drill head and inner pistons to hold the mortar mass to be pressed out wholly through passage openings in a simple operation |
| 10/11/2001 | DE10017761A1 Tube anchor for mining/tunneling has a hollow anchor body with structured outer threading on the mantle surface to give a firm bond in cracked rock |
| 10/11/2001 | DE10017751A1 Gebirgsanker Rock bolts |
| 10/10/2001 | CN2453136Y Roofbolt recovering device |
| 10/10/2001 | CA2340356A1 Tubular anchor |
| 10/04/2001 | US20010026746 Flange nut |
| 09/26/2001 | CN2450388Y Anchoring-bolt extractor |
| 09/20/2001 | WO2001069042A1 Method and system for mining hydrocarbon-containing materials |
| 09/19/2001 | CN2448927Y Steel stranded wire anchor rod |
| 09/19/2001 | CN2448926Y 可回收锚杆 Recoverable bolt |
| 09/04/2001 | US6283451 Hydraulic tensioner for mine roof support cables |
| 08/22/2001 | CN1309000A Method for machining rod body of anchor bolt and special equipment for machining spiral thread segment of rod body |
| 08/16/2001 | US20010013427 Jacket tube for a drilling and anchoring device |
| 08/14/2001 | US6273646 Method of pre-stressing a tendon |
| 08/09/2001 | WO2001057363A1 Injection anchor |
| 08/07/2001 | US6270290 Tensionable cable bolt |
| 08/01/2001 | EP1119687A1 Jacket tube for a drilling and anchoring device |
| 07/10/2001 | US6257802 Packaging arrangements for rock stabilizer sets |
| 06/28/2001 | WO2001046558A1 An anchor device for use in mining |
| 06/28/2001 | WO2001046557A1 Packaging arrangements for rock stabilizer sets |
| 06/21/2001 | WO2001044621A1 An anchor bolt assembly |
| 06/21/2001 | CA2363986A1 An anchor bolt assembly |
| 06/07/2001 | WO2001040628A1 Arrangement for feeding bonding material |
| 05/30/2001 | EP0934454B1 Anchoring device with strain measurement system |
| 05/29/2001 | CA2148590C Method of securing an anchor with extrusion plastic molding in a solid wall substrate |
| 05/29/2001 | CA2035786C Indicator-nut threaded coupling with load-indicating device adapted to be arranged on anchors, in particular grouted anchors for mining or the like |
| 05/16/2001 | CN1295176A Permanent locking cable for rock and soil engineering and its manufacture |
| 05/03/2001 | WO2001031206A1 Securing element |
| 05/03/2001 | WO2001031161A1 Self drilling roof bolt |
| 05/03/2001 | DE19958715A1 Befestigungselement Fastener |
| 05/03/2001 | DE19958714A1 Befestigungselement Fastener |
| 05/02/2001 | EP1096160A1 Fastening device |
| 04/18/2001 | CN1064736C Supporting device and method for well and tunnel |
| 04/17/2001 | CA2190676C Cable bolt driver |
| 04/11/2001 | EP1090207A1 Tie rod especially for securing rock walls, and a method for producing such a tie rod |
| 04/04/2001 | CN2426015Y Complete helix screw anchor rod |
| 04/03/2001 | US6209279 Multilayer, traction element in the form of a loop |
| 03/28/2001 | EP1087063A1 Device for drilling and anchoring and method for installing ground anchors |
| 03/28/2001 | CN2425197Y Prestressed anchor rod |
| 03/22/2001 | WO2001020131A1 Apparatus for the manufacture of rock bolts |
| 03/21/2001 | EP1085169A2 Cable rock bolt |
| 03/14/2001 | CN2423403Y Anchor rod backing plate |
| 03/14/2001 | CA2317981A1 Grit surface cable products |
| 02/28/2001 | CN2421411Y Anchoring-bolt |
| 02/22/2001 | WO2001012953A1 Anchor bolt and method of manufacturing the anchor bolt |
| 02/20/2001 | US6189281 Injection anchor |
| 02/15/2001 | WO2001011194A1 Method for fixing a spreading anchor and spreading anchor |
| 02/14/2001 | EP1075587A1 Device for a rock wall |
| 02/13/2001 | US6185886 Fixing element for reinforcement connection with a secondary action, especially for earthquake-resistant securement |
| 01/24/2001 | CN1061117C Bridge span erecting machine |
| 01/20/2001 | CA2313933A1 Mine roof truss with bent angle bolts |
| 01/10/2001 | CN2414194Y Flexible anchoring-bolt for roadway support |
| 12/28/2000 | WO2000079071A1 Concrete structure comprising anchor rods and anchor rod |
| 12/27/2000 | CN2412093Y Fast mounting non-metal anchor head |
| 12/14/2000 | WO2000075489A1 Tube-formed rock bolt |
| 12/14/2000 | CA2371136A1 Tube-formed rock bolt |
| 12/06/2000 | EP1057968A1 Method for producing a tip in a steel anchor bolt |
| 11/22/2000 | CN2407125Y Steel wire anchor shank |
| 11/16/2000 | WO2000068544A1 Device and method in connection with a rock wall |
| 11/14/2000 | US6146056 Channel and bearing plate assembly |
| 11/14/2000 | US6146055 Mine roof bolt anchor |
| 11/14/2000 | US6145601 Method and device for boring holes |
| 11/09/2000 | WO2000066873A1 Drilling apparatus and method for single pass bolting |
| 10/12/2000 | DE19913113A1 Deformation measuring device for anchor bars in mining has fibre grating sensors with fibre windings having twist angles based on compensation conditions for simultaneous linear extension and transversal contraction |
| 10/11/2000 | CN2400573Y Two-way screw anchor rod |
| 09/13/2000 | CN2396182Y Detachable anchoring-bolt |
| 09/08/2000 | WO2000052304A1 Friction bolt with flexible core |
| 08/22/2000 | US6106200 Process and device for simultaneously drilling and lining a hole |
| 08/17/2000 | WO2000047871A1 Rock anchor |
| 08/16/2000 | EP1027529A1 Apparatus for bending and cutting cable in rock bolting equipment |
| 08/07/2000 | CA2297985A1 Rock bolt |
| 07/19/2000 | CN2388349Y Screw internal expansion anchoring-bolt |
| 07/19/2000 | CN2388348Y Anchoring-bolt twisting fastener |
| 07/12/2000 | EP1017926A1 Injection device and injection method |
| 07/05/2000 | EP0960266A4 A cable bolt |
| 06/28/2000 | CN2385084Y Recovery multi-use anchoring bolt |
| 06/28/2000 | CN2385083Y Air bag plugging prestressed anchor rod |
| 06/28/2000 | CN2385082Y Anchoring bolt body |
| 06/28/2000 | CN2385081Y New type anchoring bolt |
| 06/28/2000 | CN1258335A Injection device and injection method |
| 06/21/2000 | DE19925109C1 Method for producing point on anchor bar of steel for rock and tunnel structure involves steel bar separated and point formed at dividing point, bar being heated at predetermined point of its length and tractive force applied |
| 06/14/2000 | CN2382842Y Quick mounting anchor rod of back production lane expanding shell type |
| 06/14/2000 | CN2382841Y Metal thick tail anchor rod |
| 06/14/2000 | CN2382840Y Glass fibre reinforced plastic anchor rod |
| 06/13/2000 | US6074134 Tensionable cable bolt |