| Patents for E21D 15 - Props; Chocks (3,432) |
|---|
| 11/22/2007 | US20070267559 Free Standing Support |
| 11/21/2007 | CN200978677Y Single-body hydraulic supporter elastic top cap for mining and downhole |
| 11/21/2007 | CN200978676Y Reverse U-shaped steel bracket connection subassembly for laneway support |
| 11/20/2007 | CA2285514C Beam supporter |
| 11/14/2007 | CN200975259Y Hydraulic support cap |
| 11/14/2007 | CN200975258Y Hydraulic support cap |
| 11/08/2007 | WO2007126367A1 An arrangement serving as a support or a stay |
| 11/07/2007 | CN200971784Y Anti-fall and anti-slipe device for top prop |
| 11/07/2007 | CN200971783Y Braced support |
| 11/07/2007 | CN101067377A Liquid control one-way valve for suspension moving root bar hydraulic chock |
| 11/01/2007 | WO2007124516A1 Prop installation |
| 10/31/2007 | CN200968217Y Liquid-controlled non-return valve |
| 10/31/2007 | CN200968216Y Alloy steel wood support for mining |
| 10/31/2007 | CN101063409A Combined suspension moving hydraulic support with universal upper bracket and lower hanging beam |
| 10/24/2007 | CN200964863Y Rectangular convexity resistance-increasing shoe board |
| 10/24/2007 | CN200964862Y Hydraulic bracket operation handle safety locking device for fully-mechanized face |
| 10/24/2007 | CN200964861Y Hydraulic support column for suspension bracket |
| 10/10/2007 | CN200958397Y Loader of comprehensive coal-mining stand |
| 10/10/2007 | CN101052773A Auxiliary unloading apparatus for supporting element |
| 10/03/2007 | CN200955400Y Plunger-piston suspension type single-body hydraulic pillar top-lid |
| 10/03/2007 | CN200955399Y External-injection type single-body hydraulic pillar |
| 10/03/2007 | CN200955398Y High-dipping coal-bed false-dipping room-type telescopic shield support |
| 10/03/2007 | CN101046150A Low cavity oil returning system for hydraulic prop |
| 10/03/2007 | CN101046149A 单体液压支柱 Hydraulic prop |
| 09/26/2007 | CN200952399Y Support for hydraulic chock |
| 09/26/2007 | CN200952398Y Recoverable antisliding prop housing |
| 09/26/2007 | CN200952397Y Cylinder head connection structure for jack and jack with the same connection structure |
| 09/26/2007 | CN200952396Y Mine in-well driving face temporary protective prop |
| 09/19/2007 | CN200949470Y Eelectromagnetic controlling valve |
| 09/19/2007 | CN101037746A Aluminum alloy pipe for coal mine column and preparation method thereof |
| 09/12/2007 | CN200946515Y Bottom wooden beam steel combined bracket for shed |
| 09/05/2007 | CN200943611Y Intelligent emulsion pump station for mining |
| 09/05/2007 | CN200943503Y Change-over valve with liquid return opening possessing one-way flow function |
| 09/05/2007 | CN200943502Y Hydraulic support |
| 09/05/2007 | CN101029570A Advanced stand device of driving face |
| 08/29/2007 | CN200940492Y Double support pillar |
| 08/29/2007 | CN200940491Y Height connection type single pillar |
| 08/29/2007 | CN200940490Y Plastic float disc single pillar |
| 08/29/2007 | CN200940489Y Hydraulic chock of medium thick coal layer combined advanced support |
| 08/28/2007 | US7261494 Truss shoe |
| 08/22/2007 | CN2937588Y 安全阀 Safety valve |
| 08/22/2007 | CN2937479Y Dust-proof ring of coal mine hydraulic prop |
| 08/22/2007 | CN2937478Y Protection type suspension single hydraulic prop |
| 08/22/2007 | CN101021156A Gril capable of putting top coal |
| 08/22/2007 | CN101021154A Thin basic rock shallow buried coal seam longwall face water retaining mining method |
| 08/15/2007 | CN2934574Y Comprehensive mechanical work face hydraulic prop retreating device |
| 08/15/2007 | CN2934573Y Hydraulic column with built-in hydraulic lock and safety valve |
| 08/01/2007 | CN2929188Y Mine strud of synthetic steel-wood |
| 08/01/2007 | CN2929187Y Circulation cleaning type single hydraulic pillar in mine |
| 07/25/2007 | CN2926507Y Hydraulic stand base |
| 07/25/2007 | CN2926506Y Hydraulic stand pushing rod |
| 07/25/2007 | CN2926175Y Connector of hydraulic jack and hydraulic-controlled valve |
| 07/18/2007 | CN2924013Y Safety supporting device for tunnel of mine well |
| 07/18/2007 | CN2924012Y Mine-use single-body hydraulic pillar base body |
| 07/11/2007 | EP1805380A1 Device to aid the unloading of support elements |
| 07/11/2007 | CN2921292Y Comprehesive coal mining frame spraying device |
| 07/11/2007 | CN2921284Y Far-distance operating hydraulic prop drawer |
| 07/11/2007 | CN2921283Y Hydraulic chock footing gap bridge |
| 07/11/2007 | CN2921282Y Differential pressure combined valve |
| 07/04/2007 | CN2918735Y Triple-purpose valve safety guard |
| 07/04/2007 | CN2918734Y Hand-in-hand interlocking type bidirectional falling-proof safety device |
| 06/26/2007 | US7234683 Hydraulic rescue tool supplied by a battery |
| 06/20/2007 | CN2913611Y Full-automatic support spraying unit for fully-mechanized mining working plane |
| 06/13/2007 | CN2911183Y Telescopic rod towing tail beam bracket hydraulic prop for coal mine |
| 06/12/2007 | US7228787 Method for joining the functional parts of hydraulic or pneumatic working devices, and joining connection |
| 06/06/2007 | CN2908785Y Prop end support between joist and prop of support |
| 06/06/2007 | CN2908784Y Automatic unloading support device for expansion soft rock tunnel |
| 06/06/2007 | CN1975185A Nut assembly member for reinforced glassfiber whole-thread rockbolt |
| 06/06/2007 | CN1320239C Assembling composite shore |
| 05/31/2007 | DE202007004100U1 Ausbaustütze für den untertägigen Berg- und Tunnelbau A support for underground mining and tunneling |
| 05/30/2007 | CN2906159Y Electrohydraulic unloading valve with hydraulic control and electrohydraulic control operation modes |
| 05/30/2007 | CN2906067Y Downhole elastic retractable supporting door frame for use in coal mine |
| 05/30/2007 | CN2906066Y Hydraulic prop connection clamp for mining |
| 05/24/2007 | DE202007004101U1 Ausbaustütze für den untertägigen Berg- und Tunnelbau A support for underground mining and tunneling |
| 05/23/2007 | CN2903389Y Auto spraying apparatus for full section of hydraulic support |
| 05/23/2007 | CN2903378Y Moving sealing handle for energized piston bar |
| 05/23/2007 | CN2903377Y High flow rate hydraulic safety valve |
| 05/23/2007 | CN2903376Y Auto-synchronous spraying pressure alarming apparatus of combined production support |
| 05/23/2007 | CN1966936A Hydraulic safety combined valve |
| 05/16/2007 | CN2900885Y Integrated changeover valve |
| 05/16/2007 | CN2900791Y Change valve |
| 05/10/2007 | WO2007051366A1 Suspending hydraulic pillar |
| 05/09/2007 | CN2898393Y Three-way and two-bit manual hydraulically-controlled guiding valve |
| 05/09/2007 | CN2898380Y Intelligent emulsified liquid pump station |
| 05/09/2007 | CN2898308Y Briding structure of hydraulic stand base |
| 05/09/2007 | CN2898307Y Bridging-board structure for hydraulic stand |
| 05/09/2007 | CN2898306Y Connected hard-sealed switching valve |
| 05/09/2007 | CN2898305Y Two-stage unloading hydraulically-controlled one-way valve for hydraulic stand pillar |
| 05/09/2007 | CN2898304Y External-surface cladding engineering protector of piston lever for comprehensive stand cylinder |
| 05/09/2007 | CN2898303Y Three-way valve for single hydraulic pillar |
| 05/09/2007 | CN1959064A Electrohydraulic controlled reversal valve in use for hydraulic support |
| 05/09/2007 | CN1959063A 支撑装置 Support means |
| 05/02/2007 | CN2895741Y Thin-coal-bed swing-link-beam support |
| 04/26/2007 | US20070092344 Mine support |
| 04/25/2007 | CN2893260Y Integrated inserting multifunction electrohydraulic control reversing valve |
| 04/25/2007 | CN2893148Y Mining single hydraulic prop base |
| 04/24/2007 | CA2188226C Mine support cribs |
| 04/18/2007 | CN2890339Y Soldering-free hydraulic prop for mining |
| 04/18/2007 | CN2890338Y Soldering-free riveted joint-free hydraulic prop for mining |
| 04/18/2007 | CN2890337Y End hydraulic support |