| Patents for E21D 15 - Props; Chocks (3,432) |
|---|
| 07/22/2009 | CN201277049Y Reversal valve |
| 07/22/2009 | CN201277048Y Tunnel water-proof board and concrete preliminary bracing connection structure |
| 07/22/2009 | CN201277047Y Hydraulic friction supporting post |
| 07/22/2009 | CN201277046Y External liquid-injection single-body hydraulic supporter |
| 07/22/2009 | CN201277045Y Inclined and half-edge coal seam portal type seat cap hydraulic support |
| 07/22/2009 | CN101487395A Formwork support with filling behind support |
| 07/16/2009 | WO2009089555A2 Support |
| 07/01/2009 | CN201265422Y Integral movable supporting post body |
| 07/01/2009 | CN201265421Y Mono-block hydraulic prop |
| 07/01/2009 | CN201265420Y Novel single-body hydraulic supporter |
| 06/24/2009 | CN201262089Y Hydraulic system for supplying work medium with different filter fineness to different elements of hydraulic support |
| 06/24/2009 | CN201262088Y Single-body hydraulic support column used for central liquid injection plunger type temporary support |
| 06/17/2009 | CN201258749Y Improved hydraulic prop |
| 06/17/2009 | CN100501127C Hydraulic support push rod |
| 06/11/2009 | WO2009024136A3 Stope supporting structure for face support in mines |
| 06/10/2009 | CN101451438A Prefabricated pile and method for producing the same |
| 06/04/2009 | WO2009067962A1 Lining support for underground mining and tunneling |
| 06/04/2009 | CA2706605A1 Lining support for underground mining and tunneling |
| 06/03/2009 | CN201250659Y Column shoe of individual hydraulic support |
| 06/03/2009 | CN100494631C Joint connection device |
| 06/03/2009 | CN100494627C Coal-mining method of high-dipping thick seam |
| 06/02/2009 | US7540693 Method for pillar recovery in chamber-and-pillar working and tubbing unit for pillar recovery |
| 05/27/2009 | CN201246174Y Mining high molecule frustum type skid-proof prop shoe cap |
| 05/27/2009 | CN201246173Y Reverse-proof machine of single hydraulic prop |
| 05/27/2009 | CN201246172Y Permanent display reading type single hydraulic prop pressure testing meter |
| 05/27/2009 | CN201246171Y Suspending type mining single hydraulic prop |
| 05/27/2009 | CN201246170Y Laser reinforced stainless steel upright post |
| 05/27/2009 | CN100491565C Aluminum alloy pipe for coal mine column |
| 05/20/2009 | CN201241966Y Revolving cut-off valve |
| 05/20/2009 | CN201241717Y Large flow fluid control safe valve |
| 05/20/2009 | CN201241716Y Single-inlet liquid return orifice double-telescoping upright post |
| 05/20/2009 | CN201241715Y Mining single hydraulic prop |
| 05/20/2009 | CN201241714Y Mining single hydraulic prop |
| 05/20/2009 | CN100489271C Electrohydraulic controlled reversal valve in use for hydraulic support |
| 05/13/2009 | CN201236714Y Adjustable mining single-body hydraulic supporter |
| 05/13/2009 | CN201236713Y Improved single-body hydraulic supporter |
| 05/13/2009 | CN201236712Y Anti-falling skid-proof structure of coal mine large-inclination angle light support |
| 05/06/2009 | CN201232557Y Double mobile column hydraulic prop |
| 05/06/2009 | CN201232556Y Novel anti-reversing device for developing and digging |
| 05/06/2009 | CN100485196C Electrohydraulic unloading valve with both hydraulic control mode and electrohydraulic control mode |
| 04/30/2009 | WO2009053797A2 Mine support grout bags and grout packs |
| 04/30/2009 | WO2009053796A2 A grout pack assembly and components thereof |
| 04/30/2009 | WO2009010864A3 Underground mine ventilation curtain or barrier |
| 04/30/2009 | DE202009000111U1 Setzpistole zum Befüllen von hydraulischen Druckkissen Setting gun for filling hydraulic pressure pad |
| 04/30/2009 | CA2703656A1 Mine support grout bags and grout packs |
| 04/29/2009 | CN201230419Y Hydraulic support electrohydraulic controller box body bottom board |
| 04/29/2009 | CN101418693A Hydraulic support foundation bulkhead and the hydraulic support |
| 04/22/2009 | CN201225161Y Column-dismantling machine for suspending type hydraulic column |
| 04/22/2009 | CN201225160Y Full-closed rubber piston |
| 04/22/2009 | CN201225159Y Short-specification long-stroke single hydraulic prop |
| 04/22/2009 | CN101413395A Valve arrangement |
| 04/22/2009 | CN101413394A Advanced support rack of coal mine downhole crossheading |
| 04/22/2009 | CN101413393A Gob-side entry retaining side support method of coal bed fully mechanized caving face |
| 04/16/2009 | DE102007042982A1 Pressure limiting valve i.e. two-stage switch valve, has bodies provided with flow passing pipeline, and valve units provided at inner side of bodies and provided with sealing ring, which is provided with flow limiting element |
| 04/15/2009 | CN201221364Y Hydraulic support |
| 04/08/2009 | CN201218108Y Rotatable rail swiveling plate |
| 04/08/2009 | CN201218104Y Expansion beam used for thin seam hydraulic support |
| 04/08/2009 | CN201218103Y Low-position liquid injection type suspending single-body hydraulic supporter |
| 04/08/2009 | CN101403312A Valve device |
| 04/08/2009 | CN101403311A Self-pressurizing type support leg |
| 04/08/2009 | CN101403310A Corrosion-resistant single-body hydraulic supporter and its processing method |
| 04/01/2009 | CN201215022Y Internal injection type single hydraulic support |
| 03/26/2009 | WO2009010863A3 Mine support grout bags and packs |
| 03/25/2009 | CN201212398Y External filling hydraulic prop lubrication apparatus |
| 03/25/2009 | CN201212397Y External filling hydraulic prop inner seal top cover |
| 03/25/2009 | CN201212396Y External filling hydraulic prop guide device |
| 03/25/2009 | CN101391370A Production technique of single hydraulic prop cap |
| 03/18/2009 | CN201209454Y Cross type composite material cap |
| 03/18/2009 | CN201209453Y Mechanical lifting hydraulic prop |
| 03/18/2009 | CN201209452Y Plunger piston and piston mixed double expansion mining hydraulic prop |
| 03/18/2009 | CN201209451Y Externally pouring type monoblock hydraulic prop |
| 03/17/2009 | US7503731 Yieldable prop for roof and ground control |
| 03/11/2009 | CN201206469Y Hydraulic single post with double liquid pouring port |
| 03/04/2009 | CN201202614Y Energy-saving movable pumping station |
| 03/04/2009 | CN201202479Y Sheathes of cylinder and movable column in mine hydraulic support upright post |
| 03/04/2009 | CN201202478Y Single hydraulic prop |
| 02/26/2009 | WO2009024136A2 Stope supporting structure for face support in mines |
| 02/26/2009 | WO2009024005A1 A damp telescopic tube and a damp writing pen |
| 02/25/2009 | CN201198762Y Equal cylinder diameter double-telescoping single hydraulic prop |
| 02/25/2009 | CN201198761Y Single hydraulic prop |
| 02/25/2009 | CN101372891A Strip filling integral backstopping coal mining method |
| 02/25/2009 | CN100464057C Method of supporting along spatially keeping lane end |
| 02/17/2009 | US7490440 Support device for a rib |
| 02/11/2009 | CN201193531Y Protection type suspending hydraulic prop |
| 02/11/2009 | CN201193530Y Inversion four-bar hydraulic support |
| 02/11/2009 | CN201193529Y Inversion four-bar sidle end head support group |
| 02/11/2009 | CN201193201Y Lifting vehicle for transporting rail advanced support bracket |
| 02/11/2009 | CN201192771Y Hydraulic support disassembly and assembly facilities |
| 02/05/2009 | WO2008125082A3 Hydraulic ram comprising thin-walled exterior and interior pipes |
| 02/04/2009 | CN201190570Y Support group for supporting roadway with incline top |
| 01/28/2009 | CN201187498Y Shiplap joint segment connecting apparatus among section steels of rigid U section steel support |
| 01/28/2009 | CN201187316Y Balance hoisting jack bidirectional lock and hydraulic support |
| 01/28/2009 | CN201187315Y Cross axle cap of hydraulic telescopic upright post or oil cylinder connection for hydraulic support |
| 01/28/2009 | CN201187314Y Centralized liquid-feeding apparatus of mine hydraulic prop |
| 01/28/2009 | CN201187313Y Vertical extracting support of lengthen push rod í«cross headí» |
| 01/28/2009 | CN201187312Y Mining single hydraulic prop pressure alarm |
| 01/28/2009 | CN201187311Y External pouring type single hydraulic prop |
| 01/28/2009 | CN201187310Y Hydraulic support for special-shaped laneway support protection |
| 01/28/2009 | CN201187309Y Even stress mine support |
| 01/28/2009 | CN201187308Y Large inclination angle thick coal seam support with stump along empty digging lane |