| Patents for E21D 15 - Props; Chocks (3,432) |
|---|
| 10/10/2012 | CN202483597U Suspension support column shoe |
| 10/10/2012 | CN202483596U Anti-skidding prop shoe of individual hydraulic prop for coal mines |
| 10/10/2012 | CN202483595U Linked toppling-preventive device of single hydraulic props |
| 10/10/2012 | CN202483594U Bracket anti-toppling device for metal bracket alley |
| 10/10/2012 | CN102720514A Movable type hydraulic mounting machine for coal mine roadway support bracket |
| 10/10/2012 | CN101845958B Fully mechanized coal face bracket withdrawing method and bracket traction puller for withdrawing |
| 10/09/2012 | US8282076 Opening/closing device for manhole cover |
| 10/03/2012 | CN202467924U Split type paste filling hydraulic support |
| 10/03/2012 | CN202467872U PVC column shoe |
| 10/03/2012 | CN202467871U U-shaped steel clamping cable with boss |
| 10/03/2012 | CN202467870U Hydraulic upright column |
| 10/03/2012 | CN202467869U Coplanar guide double-retracting single hydraulic prop for mine |
| 10/03/2012 | CN102704964A Quick loading device for dismantling whole support in fully mechanized mining face |
| 10/03/2012 | CN102704963A Large multifunctional dismounting machine |
| 10/03/2012 | CN102704962A Shed upper beam device of I-beam shed for coal mine laneway |
| 10/03/2012 | CN102704961A Safety valve and hydraulic support |
| 10/03/2012 | CN102704960A Mineral efficient energy-saving emulsification liquid feeding unit |
| 10/03/2012 | CN102704959A Hinged type suspension hydraulic column |
| 10/03/2012 | CN102003188B Method for supporting triangular area in coal mine support-dismantling process |
| 10/03/2012 | CN101975072B Recovery method of common combined mining working face hydraulic support |
| 09/26/2012 | CN202451181U Mechanical hand for reversely driving coal mine prop |
| 09/26/2012 | CN202451180U Movable hydraulic single prop assembly and disassembly device |
| 09/26/2012 | CN202451179U Crossbar support device used for coal mine |
| 09/26/2012 | CN202451178U Automatic beam erecting device |
| 09/26/2012 | CN202451177U 2000-liter planar coal mine hydraulic support safety valve with high service life and contamination resistance |
| 09/26/2012 | CN202451176U Emulsion box of hydraulic support assembling workshop |
| 09/26/2012 | CN202451175U Expandable strut capable of resisting deformation of U-shaped steel |
| 09/26/2012 | CN202451174U Top plate hydraulic supporting device for mining |
| 09/26/2012 | CN202451173U Single body hydraulic support capable of automatically alarming |
| 09/26/2012 | CN102691512A Auxiliary assembly and disassembly machine for hydraulic supports |
| 09/26/2012 | CN101929346B Hydraulic bracket assembling and disassembling machine with supporting upright column |
| 09/19/2012 | CN202441399U Adjustable tooth shell for reinforcing and supporting roadway capplces |
| 09/19/2012 | CN202441398U Sliding shoes connecting structure for bottom-lifting jack of hydraulic support |
| 09/19/2012 | CN202441397U Automatic supercharging device capable of improving initial supporting force of single hydraulic prop |
| 09/19/2012 | CN202441396U Gasket-mounting mass-flow hard-sealing upright hydraulic control one-way valve |
| 09/19/2012 | CN202441395U Mine support device |
| 09/19/2012 | CN202441394U Detachable reusable combined steel bar ladder |
| 09/19/2012 | CN102678140A Rotation device of hydraulic support retraction machine |
| 09/19/2012 | CN102678139A Single hydraulic prop |
| 09/19/2012 | CN102678138A Individual hydraulic prop tilting-prevention device and tilting-prevention method |
| 09/19/2012 | CN102678137A Flexible grille support and application method thereof |
| 09/19/2012 | CN102677043A Upright post of hydraulic bracket and manufacturing method thereof |
| 09/12/2012 | CN202431285U Main hinged shaft dismounting device of mine hydraulic bracket |
| 09/12/2012 | CN202431284U Static-pressure water lift column machine |
| 09/12/2012 | CN202431283U Intermediate flow rate safety valve |
| 09/12/2012 | CN202431282U Tunnel protection device for thin coal seam mining |
| 09/11/2012 | US8262064 Lifting device |
| 09/11/2012 | US8262063 Tool with hydraulic valve system |
| 09/05/2012 | CN202417543U Snap ring connection type hydraulic bracket guide sleeve press fitting machine |
| 09/05/2012 | CN202417542U On-board supporting device for steel girder |
| 09/05/2012 | CN202417541U Mine pillar metal shoe |
| 09/05/2012 | CN202417540U Antiskid device for high-inclination angle hydraulic support |
| 09/05/2012 | CN202417539U Hand reversing main control valve for thin seam hydraulic support |
| 09/05/2012 | CN202417538U Large-route single body hydraulic support |
| 09/05/2012 | CN202417537U Anti-leakage single hydraulic prop |
| 09/05/2012 | CN202417536U Constant-pressure double-expansion upright column |
| 09/05/2012 | CN202417535U Arch support used in coal mine |
| 09/05/2012 | CN202417534U Mining high-intensity corrosion-resistant shed frame |
| 09/05/2012 | CN102654058A Intrinsically safe mine pressure alarm for mine |
| 09/05/2012 | CN102086769B Method for retracting hydraulic support by utilizing four shield supports |
| 09/05/2012 | CN102031979B Assembling mechanism of guide sleeve of column of hydraulic support |
| 08/30/2012 | CA2861091A1 Preloadable support |
| 08/29/2012 | CN202402048U Stand column locking and limiting mechanism |
| 08/29/2012 | CN202402047U Welding repair plunger |
| 08/29/2012 | CN102650213A Single hydraulic prop three-use valve |
| 08/29/2012 | CN102352760B Increasing and decreasing hydraulic support for mechanized mining working face of thin coal seam |
| 08/23/2012 | US20120213598 Roof support sheet handling for underground mines |
| 08/22/2012 | CN202391439U Movable chuck for connecting U-shaped steel bracket with single hydraulic prop |
| 08/22/2012 | CN202391438U Stationary type cassette for connecting U-shaped steel support and single hydraulic prop |
| 08/22/2012 | CN202391437U Single hydraulic prop with two floating rings |
| 08/22/2012 | CN102644464A Constructing method for mining embedded artificial boundary ore pillar from open-pit to underground mine |
| 08/21/2012 | US8246276 Pumpable crib bag assembly and method of installation |
| 08/08/2012 | CN202370552U Semi-automatic hole sealing machine for assembling three-use valve |
| 08/08/2012 | CN202370551U Remote pressure relief controller for hydraulic prop |
| 08/08/2012 | CN202370550U Shock-free insertion type liquid control one-way valve |
| 08/08/2012 | CN202370549U Rapid injection prop lifting boosting device for single hydraulic prop |
| 08/08/2012 | CN202370548U Self-locking device of hydraulic operating valve |
| 08/08/2012 | CN102102525B Hydraulic support and pedal plate device thereof |
| 08/01/2012 | CN202360114U Pi-type forepoling bar fixing device for H-shaped steel shed supports |
| 08/01/2012 | CN202360113U Support frame base for thin-seam coal faces |
| 08/01/2012 | CN202360112U Plate-connection high-flow pilot operated check valve |
| 08/01/2012 | CN202360111U Liquid-control one-way valve |
| 08/01/2012 | CN202360110U Floating hydraulic bidirectional lock |
| 08/01/2012 | CN102619540A Hydraulic support placing machine turntable device |
| 08/01/2012 | CN102619539A Mining fast energy absorption erosion prevention yielding component |
| 07/26/2012 | DE10227976B4 Druckbegrenzungsventil mit zweiteiligem Federtellerstößel und Dämpfungskammer Pressure relief valve with two-piece plunger spring plate and damper chamber |
| 07/25/2012 | CN202351028U Comprehensive valve testing bench for mine hydraulic bracket |
| 07/25/2012 | CN202348841U Automatic exhaust device |
| 07/25/2012 | CN202348297U Hydraulic support cylinder mounting and dismounting machine |
| 07/25/2012 | CN202348296U Buffering monomer hydraulic support |
| 07/25/2012 | CN202348295U Mine single hydraulic prop tilting prevention device |
| 07/25/2012 | CN202348294U High-speed energy absorption anti-impact abdication hydraulic support for coal mine |
| 07/25/2012 | CN102606177A Hydraulic prop for hydraulic support system |
| 07/25/2012 | CN102269000B Front frame of integral paste filling and supporting hydraulic bracket |
| 07/25/2012 | CN102135005B Method for supporting roof of roadway under coal pillar and gob transition section |
| 07/25/2012 | CN102116160B External reversal valve for double-acting plunger type vertical post |
| 07/25/2012 | CN101985885B Traction machine for removing coal-mine hydraulic support |
| 07/18/2012 | CN202338346U 一种采掘工作面设备回收组合装置 A Face in combination means mining equipment recycling |
| 07/18/2012 | CN102587962A Methods for arranging and supporting wall-expanded gas extraction drill sites |
| 07/18/2012 | CN102587941A Mining hydraulic support monitoring system and mining hydraulic support monitoring method |