| Patents for E21D 15 - Props; Chocks (3,432) |
|---|
| 06/25/2008 | CN201078236Y Double expansion suspending type hydraulic pressure upright post |
| 06/25/2008 | CN101205810A Mining hydraulic support self-boosting system |
| 06/25/2008 | CN101205809A Double-telescopic props totipotent leg rising system and mining hydraulic support |
| 06/24/2008 | US7390147 Yieldable prop having a yield section |
| 06/18/2008 | CN100395430C All in one hydraulic post column |
| 06/11/2008 | CN201071727Y Monoblock hydraulic prop remote control device |
| 06/11/2008 | CN101196120A Hydraulic support cap |
| 06/11/2008 | CN101196119A Hydraulic support cap |
| 06/04/2008 | CN201068803Y Mining monoblock hydraulic prop |
| 05/28/2008 | CN201065766Y Safe valve for full-mechanized hydraulic support |
| 05/28/2008 | CN201065765Y Full-mechanized hydraulic support backplate bidirectional lock |
| 05/28/2008 | CN201065764Y Steel support bracket installed with anti-dumping device for miner |
| 05/28/2008 | CN201065652Y Inner pressurizing support pipe fittings for underground construction |
| 05/21/2008 | DE19824054B4 Ausbauschreiteinrichtung für den Streb-Strecken-Übergangsbereich Border expansion device for the longwall Range transition zone |
| 05/21/2008 | CN201062521Y Mine tunnel double-hook type integral pillar stabilizer |
| 05/21/2008 | CN201062520Y Mine excavation integral pillar numbering device |
| 05/21/2008 | CN201062519Y Mine tunnel integral pillar collapse preventing device |
| 05/21/2008 | CN201062518Y Single-body hydraulic supporter |
| 05/21/2008 | CN101182777A Valve cell |
| 05/21/2008 | CN101182776A Monoblock hydraulic prop valve core fly prevention cap |
| 05/14/2008 | CN201059198Y Test unit simulating tunnel digging and supporting |
| 05/14/2008 | CN201059197Y Dual-belly arc slab type contractible borehole wall device |
| 05/14/2008 | CN201059196Y Dual-belly arc slab type contractible borehole wall support device |
| 05/14/2008 | CN201059195Y Dual-belly arc slab type contractible borehole wall support fixed seat device |
| 05/07/2008 | CN201057051Y Single hydraulic prop vehicle |
| 05/07/2008 | CN101173609A Multilevel control valve |
| 04/23/2008 | EP1563166B1 Mine support |
| 04/23/2008 | CN201050376Y Double-extension vertical prop |
| 04/23/2008 | CN201050375Y Alarming support for coal mine |
| 04/23/2008 | CN201050374Y Three-softness coal bed blast-winning top-coal slippage combined bracket |
| 04/23/2008 | CN201050373Y Electric scraper discharging tunnel |
| 04/22/2008 | US7360971 Yieldable prop |
| 04/16/2008 | CN201047284Y Down-hole hydraulic system capable of differentiating the type of hydraulic pipe |
| 04/09/2008 | CN201045300Y Mineral monobody hydraulic pillar |
| 04/09/2008 | CN201045299Y Plant fibre polymerization bottom prop for supporting |
| 04/09/2008 | CN201045298Y Large inclination angle coal seam alley way anchor cote bracket |
| 04/02/2008 | CN201043471Y Pilot-operated check valve for hydraulic support of suspension upper beam |
| 04/02/2008 | CN201043470Y Non-soldering double-oil cylinder suspending type mining mono-block hydraulic prop |
| 04/02/2008 | CN201043469Y Mono-block hydraulic prop |
| 03/26/2008 | CN201041046Y Combined hydraulic support stand |
| 03/26/2008 | CN201041045Y High-intensity durable mine prop stand |
| 03/19/2008 | CN201037425Y Safety valve |
| 03/19/2008 | CN201037424Y Electricity-liquid control change-over valve for hydraulic support |
| 03/12/2008 | CN101139931A U-shaped mine tunnel supporting rack |
| 03/05/2008 | CN100373032C Mining unity hydraulic prop |
| 02/27/2008 | CN100371559C Hydraulic supporter for end of widening working face |
| 02/26/2008 | US7334968 Yieldable prop |
| 02/21/2008 | DE202007016572U1 Ausbaustütze für den untertägigen Berg- und Tunnelbau A support for underground mining and tunneling |
| 02/20/2008 | CN201025044Y A conversion valve with operation pressure 31.5MPa |
| 02/20/2008 | CN201025043Y Monomer brace rigid interlocking device |
| 02/20/2008 | CN201025042Y Dual flexing vertical pole for hydraulic pressure supporter |
| 02/20/2008 | CN201025041Y External injection monomer hydraulic pressure supporting pole |
| 02/20/2008 | CN201025040Y Advance supporting device for excavation working ground |
| 02/20/2008 | CN201025039Y Supporting frame for under-well laneway module |
| 02/20/2008 | CN101126402A Intelligent emulsion pump station for mining |
| 02/20/2008 | CN101126320A Materials casting device |
| 02/20/2008 | CN101126316A Long-wall integrated-extraction reclaiming room-type coal column mining method |
| 02/14/2008 | DE202007015282U1 Innenrohrführung für einen Zylinder Inner tube guide for a cylinder |
| 02/13/2008 | CN100368635C Regulating device for pressure and expansion or contraction deformation of steel shore structure for foundation pit |
| 02/06/2008 | CN101117890A Method of support along spatially keeping lane |
| 02/06/2008 | CN101117888A Method for reinforcing underground mine main chute |
| 01/30/2008 | CN201013819Y Prop combined offsetting spring |
| 01/30/2008 | CN201013690Y Flushing prevention filtering equipment for mining |
| 01/30/2008 | CN201013390Y Falling-proof device for coal mine tunnel single column and axle I-beam |
| 01/30/2008 | CN201013388Y Single-column collapse-proof roof board |
| 01/30/2008 | CN201013387Y Bidirectional cross control valve |
| 01/30/2008 | CN201013386Y Special column for hydraulic support |
| 01/30/2008 | CN201013385Y Suspended hydraulic support upright column surface composite protective covering |
| 01/30/2008 | CN100365244C Hydraulic supporter for tunnel digging working face |
| 01/23/2008 | CN201011306Y General picking bracket with mudsill |
| 01/16/2008 | CN201007212Y Roll over beam of slipping bracket |
| 01/16/2008 | CN101105133A Double extension suspended type hydraulic vertical prop |
| 01/16/2008 | CN101105132A Single extension suspended type hydraulic vertical prop |
| 01/09/2008 | CN201003518Y Pilot valve |
| 01/09/2008 | CN201003405Y Water spray valve |
| 01/09/2008 | CN201003404Y Pneumatic self-walking bomb-proof bracket |
| 01/09/2008 | CN101100948A Groove shaped strip steel for U-shaped steel cable clamp for telescopic lane support |
| 01/09/2008 | CN101100947A Lane type hydraulic support for sheltering from sharply slanted coal layer and its mounting, retracting and retreating method |
| 01/09/2008 | CN101100946A Subaqueous cavity filled light material and its manufacture method |
| 01/09/2008 | CN101100945A Mine tunnel U-shaped mulch area fork door support technology |
| 01/02/2008 | CN200999615Y Special upright post used for hydraulic support |
| 01/02/2008 | CN200999614Y Roadside filling side falsework |
| 01/02/2008 | CN200999613Y Roadside filling rear falsework |
| 01/02/2008 | CN100359132C Hydraulic coal mine support for low-position roof blasting-down |
| 12/26/2007 | CN200996487Y Bottom valve |
| 12/19/2007 | CN200993023Y High pressure high-flow safety valve |
| 12/19/2007 | CN200993022Y Dual-sealed single hydraulic prop |
| 12/19/2007 | CN200993021Y Mining single hydraulic prop |
| 12/12/2007 | CN200989210Y Hydraulic bidirectional lock |
| 12/12/2007 | CN200989209Y Floating disc type double-support prop |
| 12/12/2007 | CN200989208Y Multielement composite material coal mine prop |
| 12/05/2007 | CN200985800Y Bidirectional lock |
| 12/05/2007 | CN200985796Y Plug-in mounting type bidirectional lock |
| 12/05/2007 | CN200985795Y 单向锁 One-way lock |
| 12/05/2007 | CN200985794Y Liquid return circuit turnoff valve |
| 12/05/2007 | CN200985793Y Leak-proof externally pouring type monoblock hydraulic prop |
| 12/05/2007 | CN101082279A Peg-pole-prestress supporting system and construction method thereof |
| 11/28/2007 | CN200982197Y Single-body hydraulic supporter |
| 11/28/2007 | CN101078349A Hand pressing type single-body hydraulic supporter |
| 11/28/2007 | CN101078301A Inside press supporting method and supporting pipe fitting for underground construction |