| Patents for E21D 15 - Props; Chocks (3,432) |
|---|
| 04/18/2007 | CN1948714A Method of construction supporting protection for mine under ground tunnel surrounding rock broken |
| 04/11/2007 | CN2888148Y Portable energy-saving emulsion mobile pump station |
| 04/10/2007 | US7201541 Prop head bearing |
| 03/29/2007 | DE202007000433U1 Bolzen-Schlag-Zugsystem Dart impact tension system |
| 03/21/2007 | CN2881099Y Combined glide top beam hydraulic support |
| 03/15/2007 | US20070059109 Yieldable Prop Having A Yield Section |
| 03/14/2007 | CN1928322A 压力安全阀 Pressure relief valve |
| 03/07/2007 | CN2876332Y Supporter special for withdrawing |
| 03/07/2007 | CN1924294A Balancing compensation valve |
| 03/07/2007 | CN1303331C Electromagentic switching apparatus |
| 02/28/2007 | CN2874024Y Double telescopic suspension hydraulic pillar |
| 02/28/2007 | CN2874023Y Suspension type hydraulic pillar |
| 02/28/2007 | CN1920255A Method for pillar recovery in chamber-and-pillar working and tubbing unit for pillar recovery |
| 02/21/2007 | CN2871848Y Lever switching valve |
| 02/21/2007 | CN2871847Y Operating valve of comprehensive extraction hydraulic stand |
| 02/21/2007 | CN2871846Y Anti-falling device of monomer hydraulic pillar |
| 02/21/2007 | CN2871845Y Single externally-injectting hydraulic pillar |
| 02/21/2007 | CN1916367A Technical method of system unit of monitoring load-bearing safety for hydraulic support, pillars |
| 02/15/2007 | DE19813909B4 Hydraulisch aufsteuerbares Rückschlagventil für die Ausbauhydraulik in Bergbau-Untertagebetrieben Hydraulic aufsteuerbares check valve for hydraulic expansion in mining underground operations |
| 02/08/2007 | WO2006074203A3 System and method to facilitate identifying location of a remote module |
| 02/08/2007 | US20070031197 Yieldable prop having a yield section |
| 02/07/2007 | CN2866818Y Hydraulic device substituted for unloading handle |
| 02/07/2007 | CN2866817Y Multi-layer sealed monomer hydraulic prop |
| 02/07/2007 | CN1908375A Automatic controlled coal-putting comprehensive sampling hydraulic support |
| 01/31/2007 | CN2864185Y Manual lead table control valve |
| 01/31/2007 | CN2864093Y Quick connecting structure between liquid injection gun and three-way valve |
| 01/17/2007 | CN2858951Y Fluid-pressure leading support means |
| 01/17/2007 | CN1896460A High and low level assembled coal hydraulic stand on roof |
| 01/10/2007 | CN2856422Y Pillar stabilizer of single hydraulic prop |
| 01/03/2007 | CN2854128Y Light emulsion pump station |
| 01/03/2007 | CN1888395A Hydraulic support push rod |
| 12/27/2006 | CN2851579Y Supporting carrier for mining |
| 12/27/2006 | CN2851578Y Retractable supporting stand used in roadway excavation workplace |
| 12/13/2006 | CN2846504Y Regulator for base pit steel support deformation |
| 12/06/2006 | CN2844441Y Assembled sealing structure for single supporting pillar |
| 12/06/2006 | CN2844440Y Fricting supporting pillar |
| 12/06/2006 | CN1873188A Hydraulic support for filling waste rock |
| 11/22/2006 | CN2839682Y Mine well underwell small size energy-saving moving hydraulic pump station |
| 11/22/2006 | CN1865661A Chain suspension type hydraulic support |
| 11/14/2006 | US7134810 Yieldable prop having a yield section |
| 11/08/2006 | CN2835561Y Safety dust control device for three-purpose valve |
| 11/08/2006 | CN2835560Y Single hydraulic support handle body |
| 11/08/2006 | CN2835559Y Self-exhaust and lengthenable external-injection type single hydraulic support |
| 11/08/2006 | CN1858402A Comprehensive coal mining method |
| 11/08/2006 | CN1858401A Coal mining process including prop type mining and prop recovery |
| 10/25/2006 | CN2830642Y Rail sequential groove forward horizontal telescopic hydraulic prop supporting system of coal working face |
| 10/25/2006 | CN2830641Y Valve box of hydraulic prop |
| 10/25/2006 | CN2830640Y Variable guard prop for opposite mining |
| 10/18/2006 | CN2828314Y Expansion hydraulic link mechanism for hydraulic support |
| 10/11/2006 | EP1534929B1 Method for joining the functional parts of hydraulic or pneumatic working devices, and joining connection |
| 10/11/2006 | CN2825952Y Original support force controllable automatic liquid injection gun |
| 10/11/2006 | CN2825951Y Hydraulic support with composite roof timber |
| 10/11/2006 | CN2825950Y Single hydraulic support with liquid level control function for mining |
| 10/11/2006 | CN1844639A Piston rod sealing handle |
| 10/04/2006 | CN2823558Y Monomeic hydraulic prop movable prop with composite protection layer surface for mine |
| 10/03/2006 | US7114888 Yieldable prop |
| 09/20/2006 | CN2818780Y Hydraulic monomer pillar cap |
| 09/20/2006 | CN2818779Y Hung-chain hydraulic stand |
| 09/13/2006 | CN2816356Y Mine-use H-shape steel telescopic-rack connection clamping block |
| 09/13/2006 | CN2816355Y Hydraulic-rack internal telecopic beam assembly |
| 09/06/2006 | CN1828019A Two-stage unloading pilot-controlled check valve for hydraulic support pole |
| 08/30/2006 | CN2811571Y Hydraulic support for thin seam fully-mechanized coal mining face |
| 08/30/2006 | CN2811570Y Rear telescopic beam for hydraulic support |
| 08/30/2006 | CN2811569Y Prepositive and postpositive end supports for top coal caving |
| 08/29/2006 | US7097389 Forklift movable cribbing column |
| 08/23/2006 | CN2809218Y Anti-corrosion dustproof ring for hydraulic support of coal mine |
| 08/23/2006 | CN2809217Y Single hydraulic support with anti-impact air bag |
| 08/23/2006 | CN2809216Y Anti-impact protector for single hydraulic support |
| 08/17/2006 | DE202006009403U1 Pressure limiting valve e.g. for hydraulic systems, has body in which piston is adjustable in axial direction against pressure of compression spring and flow channel arranged in body has tap in rigid connection |
| 08/16/2006 | CN1818339A Topper-line externally hollowed-out coal extraction on foot ridding |
| 08/09/2006 | CN2804389Y Moving pole of double telescope column |
| 08/09/2006 | CN2804388Y Muck filling hydraulic support |
| 08/02/2006 | CN2802088Y Tail beam for hydraulic chock |
| 08/02/2006 | CN1811202A Electrohydraulic unloading valve with both hydraulic control mode and electrohydraulic control mode |
| 07/26/2006 | CN2799862Y 流量控制阀 Flow control valve |
| 07/26/2006 | CN1807842A Multipurpose assembled double-cylinder double-extension single hydraulic support with high mining height |
| 07/19/2006 | CN2797634Y Sealed type I steel composite supporting |
| 07/13/2006 | DE202005008328U1 Pit prop for a shield-type support in underground mining comprises a stamp head having a base and fixed to the end of a piston rod using a hydraulic locking element which interacts with a recess in the overlapping region when locked |
| 07/05/2006 | CN2793329Y Manual double-connected switching valve with hydraulic control |
| 07/05/2006 | CN2793293Y Stand with cylinder support |
| 06/28/2006 | CN2791254Y Safety valve for nominal pressure 40MPa |
| 06/28/2006 | CN2791253Y Impact-resisting air-bag two-column type hydraulic support |
| 06/28/2006 | CN2791252Y Liquid-injection gun |
| 06/22/2006 | US20060133899 Yieldable prop for roof and ground control |
| 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 |
| 06/14/2006 | CN2787834Y Hydraulic support with parallel connection top-beam |
| 06/14/2006 | CN2787833Y Hydraulic support for fully-mechanized top-coal caving face end |
| 06/14/2006 | CN1786420A Electric hydraulic controlled caving coal method and it hydraulic supporter |
| 06/14/2006 | CN1786419A Hydraulic supporter for end of widening working face |
| 06/08/2006 | WO2006058482A1 An assembled support |
| 05/25/2006 | US20060108569 Hydraulic rescue tool supplied by a battery |
| 05/24/2006 | CN2782934Y Four-column hydraulic prop with anti-impact air bag |
| 05/24/2006 | CN2782933Y Elastic monomer hydraulic support column |
| 05/24/2006 | CN1777758A Valve for hydraulic props of shield-type support frames, and shield-type support frame |
| 05/17/2006 | CN2781097Y Single hydraulic support board band sealing rubber ring |
| 05/17/2006 | CN2780992Y Electrichydraulic control caving coal hydraulic chock |
| 05/10/2006 | CN2779067Y Detachable top beam combined support |
| 05/10/2006 | CN2779066Y Equipment capable of drilling coal bed for pressure relief and reinforcing supports of key positions |
| 04/26/2006 | CN2775304Y High strength light self moving type protective rack |