| Patents for E21D 21 - Anchoring-bolts for roof, floor, or shaft-lining protection (4,377) |
|---|
| 11/24/2004 | CN2658403Y Steel strand rockbolt with whole-thread adapter sleeve by cold-drawing extrusion |
| 11/24/2004 | CN2658401Y Expansion type anchor bolt |
| 11/23/2004 | US6820657 Apparatus for the manufacture of rock bolts |
| 11/18/2004 | WO2004099571A1 Expandable rock bolt and rock bolting system |
| 11/18/2004 | WO2004099570A1 Controlled expansion of rock bolt |
| 11/18/2004 | WO2004099569A1 Method and device for rock bolting |
| 11/17/2004 | CN2656638Y Recoverable metal anchor rod |
| 11/10/2004 | CN2654859Y Full-recovery resistance-increasing riveting rod |
| 11/10/2004 | CN1545588A Disjointable fixing apparatus of tension member and removal method of tension member |
| 11/10/2004 | CN1544798A Shell expansion type rock bolt |
| 11/09/2004 | US6813955 Inflatable tensioning device |
| 11/04/2004 | US20040216870 Drilled hole closure |
| 11/03/2004 | CN2653131Y Adjustable anchorage cable |
| 11/03/2004 | CN2653130Y New structure prestress anchor |
| 10/27/2004 | CN2651445Y Recovering stock |
| 10/21/2004 | US20040206553 Attachment element |
| 10/20/2004 | EP1468168A2 Strain detection in rock bolts |
| 10/20/2004 | EP1468167A1 Rock bolts with an expandable element |
| 10/14/2004 | WO2004074634A3 Tubular mining bolt and method |
| 10/12/2004 | US6802674 Arrangement for feeding soldering material |
| 10/07/2004 | WO2004085792A1 Drill bit assembly, drill rod including the drill bit assembly and drill tip for a self drilling rock or roof bolt |
| 10/06/2004 | CN1535348A Connecting anchoring rod to drilling tool |
| 09/30/2004 | WO2003058003A3 Multiple synthetic deformed bars and retaining walls |
| 09/30/2004 | US20040191004 Expansion sheel assembly |
| 09/29/2004 | CN2644677Y Hollow slip casting anchor bar capable of detecting length of anchor bar |
| 09/23/2004 | US20040184872 Connecting an anchoring rod to a drilling tool |
| 09/15/2004 | CN2641289Y Recovery type rockbolt |
| 09/15/2004 | CN1166853C Full-length multi-point wedge-expanded pipe seam anchor bar |
| 09/02/2004 | WO2004074636A2 Radially deformed anchorage bolt |
| 09/02/2004 | WO2004074635A1 A drill bit, a drill rod and a self drilling roof bolt |
| 09/02/2004 | WO2004074634A2 Tubular mining bolt and method |
| 08/26/2004 | DE10321175B3 Injection ground anchor, to stabilize walls in mining and tunneling, has an inner channel with at least one chamber to hold the mixed cement to be pressed out into the borehole |
| 08/24/2004 | US6779950 Reinforcing member |
| 08/19/2004 | US20040161316 Tubular mining bolt and method |
| 08/19/2004 | US20040161305 Radially deformed anchorage bolt |
| 08/18/2004 | EP1447521A2 Method of consolidation, impermeabilisation and drainage of underground works by guided perforations |
| 08/11/2004 | CN2632321Y Composite-material rockbolt |
| 08/11/2004 | CN1520490A Drilled hole closure |
| 08/04/2004 | CN2630498Y Glass fiber reinforced anchoring bolt |
| 08/04/2004 | CN1517511A Rock roofbolt |
| 08/04/2004 | CN1517495A Continuous redlizing method of underground engieering, tunnel and underground tunnel, reinforced engineering, sealing engineering and drainage work obtained by guide punching |
| 07/29/2004 | WO2004063531A1 Rock bolt re-tensioning |
| 07/29/2004 | WO2004063530A1 Strata control method and apparatus |
| 07/29/2004 | US20040144003 Continuous method of realisation of works underground, tunnels and excavations in general with works of consolidation, permeabilisation and drainage obtained through guided perforations |
| 07/29/2004 | DE10301968A1 Fixing element used in the mining/tunnel construction industry comprises a mortar composition and a channel section arranged in an inner tube held by spacers between the outer wall of the inner tube and the inner wall of a receiving body |
| 07/24/2004 | CA2456303A1 Continuous method of realization of underground tunnels including peripheral perforations |
| 07/22/2004 | DE19503122B4 Injektionsanker Injection anchor |
| 07/21/2004 | CN2627217Y Turn-over form plate anchor bar |
| 07/21/2004 | CN2627216Y Reclamation multiplexing stud type expansion anchor bolt |
| 07/15/2004 | US20040136789 Yielding strata bolt |
| 07/15/2004 | US20040136788 Rock bolt and method of use |
| 07/15/2004 | US20040135422 Wedge barrel for a mine roof cable bolt |
| 07/14/2004 | CN2625583Y Rigidly sealed sand consolidation anchor head prestressed rockbolt |
| 07/08/2004 | DE4220636B4 Verbindungselement, insbesondere Kupplungsmuffe, für eine Schraubverbindung von Injektionsankerstangen von Injektionsankern Connecting element, in particular coupling sleeve for a screw of injection anchor rods for injection of anchors |
| 07/07/2004 | EP1434929A1 A yielding rock bolt |
| 07/01/2004 | WO2004055327A1 A yielding rock bolt |
| 06/30/2004 | CN2622392Y Hollow high strength anchor-bolt grouting anchorage piece |
| 06/29/2004 | US6757642 Method for performing wedge analysis for assessing wedge instabilities in underground openings |
| 06/22/2004 | CA2168930C Plate for use in support of a mine roof |
| 06/17/2004 | US20040115010 Apparatus for providing secondary mine roof support |
| 06/09/2004 | CN1503875A Method and device for drilling a hole and for securing an anchorage in a bore hole |
| 06/03/2004 | DE202004000088U1 Injection spike or anchor, for tunneling construction through loose rock, is a construction steel rod with an air slit along its length with a thread at the rear end and welded cutting burrs at the front end |
| 06/02/2004 | EP1423570A1 Disjointable fixing apparatus of tension member and removal method of tension member |
| 06/01/2004 | US6742966 Expansion shell assembly |
| 05/27/2004 | WO2004044383A1 Frictional mining bolt |
| 05/26/2004 | CN1498873A ANchoring agent made from inorganic material and preparation method |
| 05/19/2004 | DE20317777U1 Device for securing rock faces comprises at least one shuttering unit which is made of a flexible material and is fillable with a hardenable compound |
| 05/13/2004 | US20040091323 Frictional mining bolt |
| 05/06/2004 | US20040084217 Method and device for drilling a hole and for securing an anchorage in a bore hole |
| 04/27/2004 | CA2300742C Cable bolt with a yielding fixture and method of forming the same |
| 04/27/2004 | CA2223208C Yielding head for mine support |
| 04/15/2004 | US20040070257 Method and system for mining hydrocarbon-containing materials |
| 04/14/2004 | EP1407115A1 Connecting an anchoring rod to a drilling tool |
| 04/14/2004 | EP1407114A1 Rock-bolting apparatus and method |
| 04/07/2004 | CN2610091Y Compound anchor net supporting board |
| 03/17/2004 | EP1397580A1 Rock bolt and method of use |
| 03/16/2004 | US6705804 Anchor |
| 03/02/2004 | US6698980 Rock stabilizing apparatus and method |
| 02/26/2004 | WO2004016909A1 Rock bolt |
| 02/26/2004 | WO2003069122A3 Strain detection in rock bolts |
| 02/26/2004 | US20040035212 Inflatable tensioning device |
| 02/26/2004 | DE20314341U1 Rock anchor for preventing avalanches has cylindrical-section shaft with screw thread on end, inserted inside spreading dowel with backward-facing teeth |
| 02/25/2004 | CN2604527Y End-bearing roofbolt |
| 02/25/2004 | CN2604526Y Recoverable screw-thread steel roofbolt |
| 02/25/2004 | CN2604525Y Recoverable screw-thread steel anchor bolt |
| 02/12/2004 | WO2004013463A1 Rock bolt post grouting apparatus |
| 02/10/2004 | US6688071 Concrete structure comprising anchor rods and anchor rod |
| 02/04/2004 | CN2602164Y Prepackage damping screw nut anchor bolt |
| 02/04/2004 | CN1472421A Square modelling ceiling boards and ribbed floor |
| 01/29/2004 | US20040018062 Square embossed roof and rib plate |
| 01/27/2004 | US6682268 Method and apparatus for secondary roof support in an underground mine |
| 01/21/2004 | EP1381756A1 Method and device for drilling a hole and for securing an anchorage in a bore hole |
| 01/21/2004 | CN2600589Y Self-screw recoverable archor bolt |
| 01/15/2004 | DE10234255A1 Verwendung von Bohr-Injektionsankern als flächentragende Armierung eines Vortriebs-Gewölbeschirmes Use of drilling injection anchors as bearing surface reinforcement of a propulsion vault screen |
| 01/14/2004 | CN2599241Y 工程锚杆 Project Bolt |
| 01/08/2004 | DE20314997U1 Corrosion-protected permanent ground anchor used for anchoring buildings and permanent rock anchor comprises tie rod consisting of two individual corrosion-protected partial tie rods combined by transition tube adjoining the anchoring |
| 01/06/2004 | US6672806 Device for drilling and anchoring and process for placing grout anchors |
| 12/31/2003 | WO2004001192A1 Rock bolting system |
| 12/31/2003 | CN2596016Y Anchor rod of glass fiber reinforced plastic |
| 12/31/2003 | CN1464176A A pin timbering process and sectionalized hollow mud injecting stay bolt thereof |