| Patents for E21D 15 - Props; Chocks (3,432) |
|---|
| 12/04/2013 | CN203321550U Remote unloading connection device of hydraulic prop |
| 12/04/2013 | CN203321549U Hydraulic cylinder control valve without unloading impact resonance |
| 12/04/2013 | CN203321548U External-anchoring type mining anchor post |
| 12/04/2013 | CN203321547U Hydraulic prop double liquid injection system |
| 12/04/2013 | CN203321546U Light double-telescopic hydraulic prop |
| 12/04/2013 | CN203321545U Remote filling connection device of hydraulic prop |
| 12/04/2013 | CN203321544U Hydraulic support |
| 12/04/2013 | CN102418538B High-speed energy absorption anti-impact retreat hydraulic support for coal mine |
| 11/27/2013 | CN203310566U Fixed reading type pressure measuring instrument used for single hydraulic prop |
| 11/27/2013 | CN203308482U Anti-flying hood for headset type three-use valve with single prop |
| 11/27/2013 | CN203308481U Balance floating two-way lock |
| 11/27/2013 | CN203308480U Cartridge-type medium-flow balance two-way lock |
| 11/27/2013 | CN203308479U Integral plug-in mounting type valve element assembly for hand-directional valve |
| 11/27/2013 | CN203308478U Temporary supporting frame |
| 11/27/2013 | CN203308477U Yieldable iron support rod for mine |
| 11/27/2013 | CN203308476U Bracket device |
| 11/27/2013 | CN103410540A Loader for hydraulic supports of fully-mechanized coal mining faces of coal mines |
| 11/27/2013 | CN103410539A Coal mine fully-mechanized mining hydraulic support withdrawing mechanical hand |
| 11/27/2013 | CN103410538A Double-spool hydraulic control check valve and hydraulic support system |
| 11/27/2013 | CN103410537A Safety valve |
| 11/27/2013 | CN103410536A Mining clamp cable |
| 11/27/2013 | CN103410535A Method for manufacturing mining clamp cable |
| 11/27/2013 | CN103410534A Triple telescopic column for hydraulic support |
| 11/27/2013 | CN103410533A Impact-resistant telescopic column for hydraulic support |
| 11/20/2013 | CN203296788U Hydraulic support retreating manipulator for comprehensive excavation of coal mine |
| 11/20/2013 | CN203296787U Novel column shoe |
| 11/20/2013 | CN203296786U Large-flow liquid-return shut-off valve |
| 11/20/2013 | CN203296785U Differential combination valve for coal mine hydraulic support |
| 11/20/2013 | CN203296784U Mass-flow safety valve for hydraulic support |
| 11/20/2013 | CN203296783U Hydraulic three-purpose valve combined by single props |
| 11/19/2013 | CA2581114C Free standing support |
| 11/13/2013 | CN203285461U Working face pier stud moving device locking device |
| 11/13/2013 | CN203285460U Suspension type single hydraulic prop |
| 11/13/2013 | CN102213104B Reversing operation torsion transmission shaft and multifunctional reversing spray operation valve bank |
| 11/06/2013 | CN203271782U Movable replacer for hydraulic single props |
| 11/06/2013 | CN203271781U Hydraulic liquid returning disconnection valve |
| 11/06/2013 | CN203271780U Coal mine coal mining working surface upper corner gas extraction device and hydraulic support |
| 11/06/2013 | CN203271779U Stand column hoop and stand column |
| 11/06/2013 | CN203271778U Mine and underground novel safe tilting preventing device |
| 11/06/2013 | CN203271777U Double-beam embedded-circle retractable support |
| 11/06/2013 | CN203269458U Cylinder opening structure of bottom-lifting jack |
| 11/06/2013 | CN103382846A Hydraulic support and anti-skid device thereof |
| 11/06/2013 | CN102392640B Close-range thin coal layer simultaneous mining and parallel transporting method |
| 11/05/2013 | CA2714191C Apparatus and method for supporting a mine rib |
| 10/30/2013 | CN203257434U Three-purpose telescopic single hydraulic support |
| 10/30/2013 | CN203257433U Sound wave sensing alarm device of hydraulic support |
| 10/30/2013 | CN203257432U Novel hydraulic stand column piston mechanism |
| 10/30/2013 | CN203257431U Novel collapse-proof tooth shell device |
| 10/30/2013 | CN203257430U Support buffering and damping device for smart well |
| 10/23/2013 | CN203248176U 液压支柱 Hydraulic prop |
| 10/23/2013 | CN203248175U Automatic coupling supporting device of mineshaft deep roadway |
| 10/23/2013 | CN103362524A Drum type boosting multi-ring composite sealing handle body |
| 10/23/2013 | CN101994728B Manual pilot combined operating valve for hydraulic support |
| 10/16/2013 | CN203239366U Device for synchronous pre-supporting and anchoring following tunneling machine |
| 10/16/2013 | CN203239364U Overall plug-in type manual reversing valve |
| 10/16/2013 | CN203239363U Balance jack used for hydraulic support |
| 10/16/2013 | CN203239362U Large-flow reversing valve for mines |
| 10/16/2013 | CN203239361U Novel slippage top beam hydraulic support |
| 10/16/2013 | CN203239360U Adjustable double-blocking energy-absorption scour-prevention hydraulic support |
| 10/16/2013 | CN203239359U Anti-impact energy-absorption combined metal support for coal mining tunnel |
| 10/16/2013 | CN102383811B Hydraulic valve group protecting device for hydraulic bracket |
| 10/09/2013 | CN203230441U Two-way lock for plug-in hard-sealing balance jack |
| 10/09/2013 | CN203230440U Mining reversing valve blocking device |
| 10/09/2013 | CN203230439U Mechanical compensation hydraulic vertical post for coal mine underground drill rig |
| 10/08/2013 | US8550434 Cylinder jack stand |
| 10/08/2013 | US8550433 Adjustable column system and method |
| 10/03/2013 | WO2012159758A3 Height-adjustable heavy-duty support |
| 10/02/2013 | CN203223234U Plug-in mounting type water-spraying valve for coal mine hydraulic supporting frame |
| 10/02/2013 | CN103334777A High-flow safety valve with rated working pressure 35-50 MPa |
| 10/02/2013 | CN103334776A Integral plug-in valve core assembly for hand-operated direction valve |
| 10/02/2013 | CN103334775A Gas extraction device for upper corner of coal mining working face and hydraulic bracket |
| 10/02/2013 | CN103334774A Externally-anchored mining anchor column and construction method thereof |
| 09/25/2013 | CN203214075U Hydraulic support |
| 09/25/2013 | CN103321662A Integrated lifting mechanism of hydraulic cylinder of rotary table |
| 09/25/2013 | CN103321661A Integral plug-in type hand-operated direction valve |
| 09/25/2013 | CN103321660A Mining constant-resistance yielding energy-absorbing impact-resisting supporting device |
| 09/25/2013 | CN102454410B Timbering equipment for coal mines |
| 09/18/2013 | CN203202490U Three-way tube base for monomer hydraulic prop |
| 09/18/2013 | CN203202489U Multi-pipe connector for monomer hydraulic prop |
| 09/18/2013 | CN203201576U Locating buckle for monomer hydraulic prop |
| 09/18/2013 | CN203201575U Hydraulic strut positioning device capable of turning |
| 09/18/2013 | CN203201574U Automatic spraying control valve for hydraulic support |
| 09/18/2013 | CN203201573U Special fastening device for upright post guide sleeve |
| 09/18/2013 | CN203201572U Variable-angle pedal for hydraulic support |
| 09/18/2013 | CN203201571U Single hydraulic brace |
| 09/18/2013 | CN203197545U Tooling for integral assembling of hydraulic support and hydraulic cylinder |
| 09/18/2013 | CN103306692A Integral inserting handle cover of hand-operated direction valve |
| 09/18/2013 | CN103306691A Folding type supporting device |
| 09/11/2013 | CN203189047U Wedge-shaped connecting piece for contractible grid support |
| 09/11/2013 | CN203189046U 500L/ min safety valve for hydraulic support jack |
| 09/11/2013 | CN203189045U 400L/ min safety valve for hydraulic support jack |
| 09/11/2013 | CN203189044U Handlebar valve body of internal injecting type single hydraulic prop |
| 09/11/2013 | CN203189043U Large mining height high-end hydraulic supporting frame large-cylinder-bore double-stretching stand column bottom valve |
| 09/11/2013 | CN203189042U Large mining height high-end hydraulic supporting frame stand column safety valve |
| 09/11/2013 | CN203189041U Guide stop valve with conical surface |
| 09/11/2013 | CN203189040U External injecting type single hydraulic prop for coal mine |
| 09/11/2013 | CN203189039U Tunnel middle standing pillar supporting structure |
| 09/11/2013 | CN103291336A Cartridge large-flow balance bidirectional lock |
| 09/11/2013 | CN103291335A Balanced floating bidirectional lock |
| 09/11/2013 | CN103291334A Flexible supporting device for steeply-inclined coal seam |