| Patents for E21D 23 - Mine roof supports for step-by-step movement, e.g. in combination with provisions for shifting of conveyers, mining machines, or guides therefor (3,544) |
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| 03/27/2013 | CN202832598U Heavy type large mining height all-protection large inclined angle long wall fully mechanized caving face automatic control supporting device |
| 03/27/2013 | CN202832529U Coal mining equipment |
| 03/27/2013 | CN102996153A Compact hydraulic support controller |
| 03/27/2013 | CN102996152A Sub-frame support device |
| 03/27/2013 | CN102996151A Method and device for increasing working space of working face under shaft lower than 1.8m |
| 03/27/2013 | CN102996150A Gangue stopping device |
| 03/27/2013 | CN102022130B Stepping self-walking cantilever timbering of fully mechanized workface |
| 03/20/2013 | CN202810887U Bottom lifting device for support frame |
| 03/20/2013 | CN202810886U Hydraulic support assembling device and system |
| 03/20/2013 | CN202810885U Tunnel excavation support bench |
| 03/20/2013 | CN202810884U Hydraulic support for forepoling |
| 03/20/2013 | CN202810883U Pseudo inclined coal mining working face hydraulic support frame and scraper conveyor connecting device |
| 03/20/2013 | CN202810882U Multistage protecting side mechanism and hydraulic support |
| 03/20/2013 | CN102979545A Large-mining-height front and rear top beam coaxial articulated fill coal mining hydraulic bracket |
| 03/20/2013 | CN102979544A Front beam structure of hydraulic support |
| 03/20/2013 | CN101907107B Oil tank of caterpillar track travelling hydraulic support |
| 03/20/2013 | CN101832144B Narrow comprehensive mining hydraulic bracket |
| 03/20/2013 | CN101766927B High-pressure and high-precision backwashing filtration station |
| 03/13/2013 | CN202788902U Thrust gear capable of providing effective torque and low coal seam hydraulic support |
| 03/13/2013 | CN202788901U Connecting structure between conveyor middle chute and hydraulic support |
| 03/13/2013 | CN202788900U Circulating mobile fore support |
| 03/13/2013 | CN202788899U Large-swing beam structured top coal caving hydraulic support |
| 03/13/2013 | CN202788898U Mining hydraulic bracket support post |
| 03/13/2013 | CN202788897U Novel tunnel tail support for fully mechanized caving faces |
| 03/13/2013 | CN202788896U Protection net |
| 03/13/2013 | CN202788895U Movable side guard plates on two sides of high inclining-angle support |
| 03/13/2013 | CN202788848U Tunneling, anchoring and protection integrated machine |
| 03/13/2013 | CN102966364A Coalface floor stepping type hydraulic supporting frame |
| 03/13/2013 | CN102966303A Ladder stand device and hydraulic support |
| 03/13/2013 | CN102080565B Bracket spraying dust fall device used for fully mechanized caving coal mine working face |
| 03/06/2013 | CN202768045U Pushing-moving mechanism dynamic circulation hydraulic system |
| 03/06/2013 | CN202768044U Thin seam support bottom lifting mechanism and thin seam support |
| 03/06/2013 | CN202768043U Up-mounted thrust gear and thin seam hydraulic support |
| 03/06/2013 | CN202768042U Base seat structure of hydraulic support |
| 03/06/2013 | CN202768041U Onboard steel beam multifunctional support |
| 03/06/2013 | CN202768040U Bag type diaphragm filling hydraulic support |
| 03/06/2013 | CN202768039U Turning foldable temporary support device for extending extendable stroke |
| 03/06/2013 | CN202768038U Inserting plate for top coal caving hydraulic support tail beam |
| 03/06/2013 | CN202768037U Fore support frame of machine lane |
| 03/06/2013 | CN202768036U General type statically indeterminate hydraulic support |
| 03/06/2013 | CN202768035U Hydraulic support caving shield and hydraulic support |
| 03/06/2013 | CN102953756A Tamping mechanism for waste filling |
| 02/27/2013 | CN202756003U Tunneling simple and temporary support |
| 02/27/2013 | CN202756002U Two-way lockup valve used for hydraulic support |
| 02/27/2013 | CN202756001U Hydraulic control one-way valve used for invert pulling pushing cylinder of hydraulic support |
| 02/27/2013 | CN202756000U Airborne temporary support frame |
| 02/27/2013 | CN102947544A Method for locating persons and/or mobile machines in mine caverns using rfid technology, and longwall face extraction installation for carrying out the method |
| 02/27/2013 | CN102943684A Line paving method of coal mining bracket |
| 02/27/2013 | CN102943683A Hydraulic support protection net device |
| 02/27/2013 | CN102943682A Large-dip-angle hydraulic support and flying gangue prevention device thereof |
| 02/27/2013 | CN102943671A Coal mining equipment and data transmission system for same |
| 02/20/2013 | CN202745933U Four-column double swing beam type gangue-filled hydraulic support |
| 02/20/2013 | CN202745908U Bottom lifting device for mine hydraulic support |
| 02/20/2013 | CN202745907U Large-dip-angle blasting light top coal caving support group |
| 02/20/2013 | CN202745906U Circulatory advancing forepoling |
| 02/20/2013 | CN202745905U Hydraulic support sliding limiting device |
| 02/20/2013 | CN202745904U Novel advance support bracket |
| 02/20/2013 | CN202745903U Chute device |
| 02/20/2013 | CN202745902U Flying gangue-proof device and two-upright-post hydraulic shield support |
| 02/20/2013 | CN202745901U System used for installing top wall shoe plate on top wall of mine |
| 02/20/2013 | CN202745892U Composite telescopic beam mechanism |
| 02/20/2013 | CN102937031A Roof support sheet handling for underground mines |
| 02/20/2013 | CN102116163B Vertical hydraulic bracket |
| 02/13/2013 | CN202731980U Dual-control spray valve for hydraulic support |
| 02/13/2013 | CN202731962U Adjacent control system for hydraulic support |
| 02/13/2013 | CN202731961U Forepoling device for driving soft coal seams |
| 02/13/2013 | CN202731960U Mine goaf filling and roadway retaining device system |
| 02/13/2013 | CN202731959U Side protecting mechanism of hydraulic support for thin coal seam |
| 02/13/2013 | CN102926791A Thrust gear capable of providing effective torque and hydraulic support of thin coal seal |
| 02/13/2013 | CN102926790A Inter-support coal-leakage-prevention device of combined-mining hydraulic support |
| 02/13/2013 | CN102926789A Confirming method of center distance and width of hydraulic bracket |
| 02/13/2013 | CN102926788A Pressure regulation method for resistance-increasing and constant-resistance stages of hydraulic bracket |
| 02/13/2013 | CN102926787A Method for increasing setting load of hydraulic bracket |
| 02/13/2013 | CN102926786A Bracket removal device |
| 02/13/2013 | CN102926785A Method for preventing rib spalling of coal wall and roof falling in head face and hydraulic support thereof |
| 02/13/2013 | CN102926784A Hydraulic supporting-shielding bracket structure for coal face |
| 02/13/2013 | CN102926783A Hydraulic bracing bracket structure for coal face |
| 02/13/2013 | CN102926782A Connection method of hydraulic bracket capable of accomplishing movements such as ascending, descending, pushing and moving |
| 02/13/2013 | CN102926781A Timbering device of inverse connecting rod mechanism for gob-side entry retaining |
| 02/13/2013 | CN102926780A Containing gangue filling and tamping mechanism for gangue filling hydraulic support |
| 02/13/2013 | CN102926779A Hydraulic shielding bracket structure for coal face |
| 02/13/2013 | CN102926778A Shielding beam structure of hydraulic bracket |
| 02/13/2013 | CN102926777A Top beam structure of hydraulic bracket |
| 02/13/2013 | CN102022122B Support-type comprehensive tunneler |
| 02/13/2013 | CN101886547B Two-pier shielding type large mining height lapping hydraulic bracket |
| 02/13/2013 | CN101871355B Four post support shield type large mining height mesh-placement hydraulic support |
| 02/13/2013 | CN101832150B Ultra thick coal bed fully mechanized underground mining protection process and special protection supporting frame |
| 02/06/2013 | CN202718700U Middle flow reversible lock |
| 02/06/2013 | CN202718699U Large flow bidirectional lock |
| 02/06/2013 | CN202718698U Wireless electro-hydraulic control system of hydraulic support for coal mine fully mechanized mining (releasing) working faces |
| 02/06/2013 | CN202718697U Back and front arranged type roadway bracket thrust gear |
| 02/06/2013 | CN202718696U Hydraulic support |
| 02/06/2013 | CN202718695U Top breaking device matched with top coal caving support |
| 02/06/2013 | CN202718694U Hydraulic bracket with large dip angle |
| 02/06/2013 | CN202718686U Reversing valve integral type multi-core control connecting plate for hydraulic support |
| 02/06/2013 | CN202718682U Nitrogen safety valve for coal mine fully-mechanized mining hydraulic support |
| 02/06/2013 | CN102913279A Gangue clamping-proof structure for gangue filling tamping mechanism |
| 02/06/2013 | CN102913268A Mobile support bracket of tunneling machine |
| 02/06/2013 | CN102913267A Omnibearing roadway anchoring and supporting integrated machine |
| 02/06/2013 | CN102913266A Two-stage telescopic tamping mechanism used for recrement filling hydraulic support |