| Patents for E21D 17 - Caps for supporting mine roofs (547) |
|---|
| 01/28/2009 | CN201187317Y Support type front cantilever |
| 01/14/2009 | CN201180552Y Anchor bar suspension device of front cantilever |
| 01/14/2009 | CN201180551Y Anchor bar suspension device of front cantilever |
| 11/19/2008 | CN100434655C Advanced supporting and protecting technology for cracked top plate of digging operation face |
| 11/12/2008 | CN201148876Y Polymer light type skidproof top beam |
| 11/12/2008 | CN100432373C Connecting device between paratactic roof beams |
| 10/22/2008 | CN201137498Y Amortized bracket joist |
| 10/01/2008 | CN201125740Y Telescopic type front cantilever support |
| 10/01/2008 | CN201125734Y Anti-rolling apparatus of mine down-hole large inclination angle working face |
| 08/20/2008 | CN100412317C Square modelling ceiling boards and ribbed floor |
| 07/09/2008 | CN101215972A Temporary support air-actuated joist for tunneling |
| 07/03/2008 | WO2008033504A3 Protective coatings for drill pipe and associated methods |
| 06/11/2008 | CN201071728Y Combined sliding upper beam hydraulic support and upper beam connecting mechanism |
| 05/21/2008 | CN201062522Y Mine tunnel supporting-hinged girder numbering device |
| 05/21/2008 | CN101182778A Reinforced bar joisted for top board |
| 04/23/2008 | CN201050377Y Support |
| 04/09/2008 | CN201045298Y Large inclination angle coal seam alley way anchor cote bracket |
| 04/02/2008 | CN201043472Y Pretension type extension beam for high-dipping thin coal seam tunnel coal seam roof plate |
| 02/27/2008 | CN201027542Y Shed beam used for coal mine down-hole |
| 02/26/2008 | CA2473260C Parallel girder, in particular, for mine and tunnel supports |
| 02/20/2008 | CN201025045Y Self locking front probing beam suspender |
| 01/30/2008 | CN201013391Y Metal hinged back material |
| 01/30/2008 | CN201013390Y Falling-proof device for coal mine tunnel single column and axle I-beam |
| 01/30/2008 | CN201013389Y Retractable front cantilever support |
| 01/16/2008 | CN201007212Y Roll over beam of slipping bracket |
| 01/09/2008 | CN101100947A Lane type hydraulic support for sheltering from sharply slanted coal layer and its mounting, retracting and retreating method |
| 01/03/2008 | US20080000909 Cap device |
| 01/02/2008 | CN200999617Y Calcium metal plastic basketry sheet |
| 01/02/2008 | CN200999616Y M shaped supporting beam for mine |
| 12/26/2007 | CN200996294Y Mining H-shaped supporting beam |
| 11/21/2007 | CN101074605A Roof pretightening telescopic beam of emergent thin coal-bed lane and its supporting method |
| 10/23/2007 | US7284933 Square embossed roof and rib plate |
| 10/16/2007 | US7281640 Cap device |
| 10/03/2007 | CN200955402Y Probing-beam fixing device in front of anchor-net lane temporary support |
| 10/03/2007 | CN200955401Y Mine-use H-shape steel-shed falling-down preventing apparatus |
| 09/12/2007 | CN200946516Y Safe beam device |
| 08/22/2007 | CN101021156A Gril capable of putting top coal |
| 07/25/2007 | CN2926508Y Slip-casting roofbolt |
| 07/11/2007 | CN2921285Y Bolt-spary gallery simply, supported ends beam type temporary support apparatus |
| 07/04/2007 | CN2918736Y Concave beam regulating instrument |
| 06/27/2007 | CN2916134Y Advance-support front canopy in roadway |
| 06/27/2007 | CN2916133Y H-shape girder steel with reinforcement device |
| 05/09/2007 | CN2898310Y Top-beam structure of hydraulic stand |
| 05/09/2007 | CN2898309Y Fixed topped beam of side guard board |
| 05/02/2007 | CN2895742Y Hydraulic support shield beam structure |
| 05/02/2007 | CN2895741Y Thin-coal-bed swing-link-beam support |
| 04/25/2007 | CN2893149Y U-shape steel supporting tunnel gib forestope fixing device |
| 04/18/2007 | CN2890337Y End hydraulic support |
| 04/04/2007 | CN2886082Y Calibrated mount for top bean side guard plate |
| 04/04/2007 | CN1939972A Supporting reinforcement board and its production |
| 03/21/2007 | CN2881100Y Joist of reinforced bar ladder |
| 03/14/2007 | CN1928322A 压力安全阀 Pressure relief valve |
| 02/21/2007 | CN2871849Y Lane sharpening stand against side-pressure bottom drum |
| 02/14/2007 | CN2869324Y Pin timbering forestope suspension device |
| 02/08/2007 | US20070031198 Motor-vehicle roof antenna with sheet-metal base plate |
| 02/07/2007 | CN2866820Y Gril capable of putting top coal |
| 02/07/2007 | CN2866819Y High-strength metal twisted top beam for coal mine use |
| 12/20/2006 | CN2849171Y Anchor rope supporting plate |
| 12/20/2006 | CN2849170Y Extended top beam device using elastic steel plate |
| 11/22/2006 | CN2839560Y Cable support and shed type support coupling integral apparatus |
| 11/15/2006 | CN2837512Y Rockbolt joist |
| 11/08/2006 | CN1858405A Method for quick constructing water gate wall under high pressure surging water in soft coal tunnel |
| 10/31/2006 | CA2253077C Tensionable cable truss support system |
| 10/11/2006 | CN1844640A Connecting device between paratactic roof beams |
| 08/02/2006 | CN2802089Y Connection device between parallel cap |
| 07/27/2006 | WO2006076828A1 A hydraulic roof support |
| 06/21/2006 | CN2789412Y Convertible two-purpose hinged bar |
| 06/14/2006 | CN2787836Y Slipping bar hydraulic support with H-shaped steel bar top-beam |
| 06/14/2006 | CN2787835Y Slipping support with steel bar long beam |
| 05/10/2006 | CN2779066Y Equipment capable of drilling coal bed for pressure relief and reinforcing supports of key positions |
| 04/12/2006 | CN2771483Y Floating-proof angle-adjusting wedge |
| 12/28/2005 | CN2748639Y Anti-tearing steel strip with high flange for mine support |
| 11/30/2005 | CN1702299A Design method for telescopic beam assembly in hydraulic support |
| 08/18/2005 | DE102004047016A1 Deckelvorrichtung Cap device |
| 08/03/2005 | CN2714805Y Coal drift profiled supporting strip |
| 05/05/2005 | US20050092752 Cap device |
| 03/16/2005 | CN1594834A Truss supporting technology for ingredient top slope deformation control |
| 02/16/2005 | CN1580491A Advanced supporting and protecting technology for cracked top plate of digging operation face |
| 01/26/2005 | CN2674095Y 2L type hydraulic support frame |
| 11/17/2004 | CN2656637Y Single body upright column type temporary supporting protection device |
| 10/20/2004 | CN2649776Y Mine prestressed concrete pressure-release elastic standby board |
| 09/29/2004 | CN2644676Y Suspending and pushing device for combined top beam hydraulic support joist |
| 07/07/2004 | CN2623877Y Locking equipment for double T iron ladder-shaped support shed beam |
| 07/07/2004 | CN2623876Y Forward stretching support beam for excavation support to prevent collapse by interlock |
| 05/26/2004 | CN2617927Y Side joist of rockbolt |
| 05/26/2004 | CN2617926Y Joist of rockbolt |
| 05/05/2004 | CN2614273Y Composite top beam for mining |
| 04/21/2004 | CN2612801Y Laneway apical plate abscission layer automatic monitoring alarm device |
| 04/07/2004 | CN2610090Y End tail support side frame device of top-coal caving face |
| 02/11/2004 | CN2603202Y Wild-goose shape steel band for underground roof support of mine |
| 02/04/2004 | CN1472421A Square modelling ceiling boards and ribbed floor |
| 01/29/2004 | US20040018062 Square embossed roof and rib plate |
| 01/14/2004 | CN2599240Y Duction cast iron anchorage cable supporting board |
| 01/14/2004 | CN1467362A Inorganic mine timber material |
| 11/05/2003 | CN2584829Y High-strength cross metal twist cap |
| 09/10/2003 | CN2572004Y Mine retaining-plate |
| 05/28/2003 | CN2553113Y Towing beam synchronous moving combined support |
| 05/21/2003 | CN2551768Y Wide board type engineering plastic hinged cap for mine |
| 12/25/2002 | CN2527709Y Mine I-steel retainer |
| 04/03/2002 | CN2484407Y Support stabilizer of supporting device of single hydraulic supporting-column |