| Patents for E21D 15 - Props; Chocks (3,432) |
|---|
| 07/25/2002 | DE10114344C1 Support element, for an underground mine, comprises a T-shaped central column consisting of a hydraulically curable and inflatable material surrounded by a sleeve made of stacked non-flammable empty car tires |
| 07/17/2002 | CN2500805Y Rubber piston monomer hydraulic prop |
| 07/17/2002 | CN1087807C Hydraulic prop frame for low position blasting down the roof coal |
| 06/06/2002 | WO2002044100A2 Cement-containing compositions and method of use |
| 05/30/2002 | WO2002042573A2 Method and apparatus for pre-stressing a roof support |
| 05/28/2002 | US6394707 Yieldable mine roof support |
| 05/28/2002 | US6394405 Continuously adjustable rescue strut |
| 05/08/2002 | CN1084425C Hydraulic double sleeve prop |
| 05/01/2002 | CN2489095Y Roadway support collapsing-preventing device |
| 04/25/2002 | US20020046650 Hydraulic cylinder |
| 04/04/2002 | DE10045680A1 Hydraulic cylinder esp. for mine prop in mining operations has seal arrangement with guide ring with open lubricant grooves connected to lubricant supply line on outside of cylinder |
| 04/03/2002 | CN2484406Y Leakage alarm of single-body hydraulic support-column |
| 04/02/2002 | US6364270 Beam supporter |
| 03/27/2002 | CN1081722C Controllable setting load automatic fluid injection gun |
| 03/21/2002 | DE10044367A1 Verlorener Unterstützungsausbau für den Berg- und Tunnelbau Lost expansion support for mining and tunneling |
| 03/14/2002 | US20020031407 Prop device for mining and tunnel construction |
| 03/13/2002 | EP1186745A2 Telescopic prop for mining and tunnel construction |
| 03/05/2002 | US6352392 Mine roof support crib having only two or three planes, and method |
| 02/20/2002 | CN1079489C Combined hydraulic support |
| 01/30/2002 | EP1029152B1 Cutting machine |
| 01/09/2002 | CN2470537Y Water-hydraulic pillar non-return valve seat |
| 01/09/2002 | CN2470536Y Water-hydraulic pillar piston and base seat thereof |
| 01/09/2002 | CN1330207A Hydraulic prop system |
| 01/08/2002 | CA2162369C Support prop |
| 12/27/2001 | US20010055517 Compressible support column |
| 12/19/2001 | CN2466349Y Telescopic rod stabilizing mechainsm |
| 12/12/2001 | CN2464938Y Falling-proof column head for single hydraulic prop |
| 09/26/2001 | CN2450387Y Single hydraulic prop |
| 09/26/2001 | CN1071857C Manufacture of unit of cylidner of piston and piston cylinder unit produced with same |
| 08/15/2001 | CN2443195Y 复合式密封圈 Composite seals |
| 08/15/2001 | CN1069733C 单体液压支柱 Hydraulic prop |
| 08/01/2001 | CN1306150A Reinforcing bar netted chock and netted-shell bolting and shotcrete support |
| 07/04/2001 | CN2437857Y Prop falling prevention device for mining supporting |
| 06/26/2001 | US6250849 Interconnected cribbing system |
| 06/06/2001 | CN2433391Y Hydraulic prop drawer |
| 05/23/2001 | CN1296116A Hydraulic prop frame for low position blasting down the roof coal |
| 04/18/2001 | CN1064734C Prop for use in underground mining or tunnel construction |
| 04/03/2001 | US6209440 Hydraulic double telescopic prop |
| 03/06/2001 | US6196635 Method of installation of cuttable mine support |
| 03/01/2001 | WO2001014692A1 Yielding mine prop |
| 02/21/2001 | CN2420424Y Middle joint for coal mine hydraulic device |
| 02/21/2001 | CN2420423Y Three-way juint for coal mine hydraulic device |
| 02/21/2001 | CN2420422Y Automatic controlled top coal working rack |
| 01/17/2001 | EP1069261A1 Adjustable rescue strut |
| 01/16/2001 | US6174110 Shoring leg |
| 01/10/2001 | CN1279340A Shield supports for having influence on edge of roof caving |
| 11/22/2000 | CN2407124Y Mineral monobody hydraulic pillar |
| 11/08/2000 | CN1058318C Single machinery prop |
| 10/11/2000 | CN1269456A New-type single pit prop with piezometer |
| 09/28/2000 | WO2000056983A1 Mine support crib and method |
| 09/27/2000 | CN2398424Y Special equipment for underground hydraulic support assembling and resolving |
| 09/20/2000 | CN2397258Y Integral hydraulic support for ultrathin coal seam |
| 09/14/2000 | WO2000053892A1 Mining support crib |
| 09/13/2000 | CN2396181Y Mechanism for parallel sliding and lifting of hydraulic chocks |
| 09/13/2000 | CN2396180Y Mechanism for integratedly regulating hydraulic chocks |
| 09/05/2000 | US6112597 Circuit board connection for a pressure sensor used in mining hydraulics |
| 08/23/2000 | EP1029152A1 Cutting machine |
| 07/05/2000 | CN2386195Y Tape-pressure high compensating type anti-fall single hydraulic support |
| 06/29/2000 | WO2000009858A3 Inflatable mine support |
| 06/27/2000 | US6079910 Column cribbing system |
| 06/22/2000 | WO2000036274A1 An underground support pack |
| 06/21/2000 | CN1257155A Support and protective element with improved filler |
| 06/13/2000 | US6073654 Hydraulically trippable check valve for underground mine support hydraulics |
| 05/31/2000 | CN2380688Y Self-arching anchor rod capable of withdrawing |
| 05/31/2000 | CN2380687Y Intake-stopping filtering and return-cut-off board |
| 05/17/2000 | CN2378538Y Prop anti topping cap lid for mining support |
| 05/17/2000 | CN2378537Y 单体液压支柱活塞 Piston hydraulic prop |
| 05/17/2000 | CN1052526C Light low-level hydraulic prop for caving coal mining method |
| 05/02/2000 | US6056480 Support for underground mining and tunnel construction |
| 04/12/2000 | EP0992641A1 Beam supporter |
| 03/22/2000 | CN2370158Y Metal hanging top beam for mining support |
| 03/16/2000 | WO2000014384A1 Mine support |
| 03/16/2000 | CA2343178A1 Mine support |
| 03/08/2000 | CN2367769Y Primary support-force controllable automatic liquid-filling gun |
| 03/02/2000 | WO2000011320A1 Support pack component |
| 03/02/2000 | WO2000011319A1 Method of and apparatus for prestressing a support in underground mines |
| 03/02/2000 | WO2000011318A1 Apparatus for prestressing a support in underground mining |
| 02/24/2000 | WO2000009858A2 Inflatable mine support |
| 02/24/2000 | CA2340066A1 Inflatable mine support |
| 02/23/2000 | CN2365397Y Terminal chock for middle and deep coal layer working face timbering |
| 02/17/2000 | WO2000008305A1 Mine support and ventilation system |
| 01/19/2000 | CN2359467Y Pressure-boost injection gum |
| 01/19/2000 | CN1241678A Jointing method for telescopic U-steel overlap sections of support |
| 01/12/2000 | CN1240875A Hydraulic drivage support with front cantilever |
| 12/15/1999 | CN2353890Y Clamping device for front-projective beam of support |
| 12/08/1999 | CN1238025A Hydraulic double telescopic prop |
| 12/02/1999 | DE19824453A1 Container for backfilling underground workings |
| 11/04/1999 | WO1999056003A1 Method and apparatus for load rate monitoring |
| 10/27/1999 | CA2236062A1 A pit prop |
| 10/20/1999 | CN1232132A Method for producing glass fibre reinforced plastic prop shoe, and special mould thereof |
| 10/20/1999 | CN1232131A Controllable setting load automatic fluid injection gun |
| 10/19/1999 | US5967702 Quick-release pit prop |
| 10/07/1999 | DE19813909A1 Hydraulically trippable check valve for mine support hydraulics |
| 09/22/1999 | CN2339749Y Pressure-measuring liquid-supplementing instrument for support of mine |
| 09/14/1999 | US5950673 Valves |
| 09/01/1999 | CN1227306A Combined hydraulic support |
| 07/28/1999 | CN2330786Y 伸缩式尾梁 Retractable tail boom |
| 07/28/1999 | CN2330785Y Transversal end hydraulic support |
| 07/28/1999 | CN2330784Y Baseplate for hydraulic stand |
| 07/21/1999 | CN2329765Y Hand fast prop lifting device |