| Patents for E21D 17 - Caps for supporting mine roofs (547) |
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| 02/11/2015 | CN102926773B 组装式混凝土块压杆梁及使用方法、生产模具、生产方法 Assembled strut beams and concrete blocks to use, production tooling, production methods |
| 01/07/2015 | CN204082181U 一种矿井支护 Support in mine |
| 01/06/2015 | CA2814876C Intrinsically safe backup power supply for combustible environments |
| 12/31/2014 | CN102191945B 液压支架的顶梁 Top beam hydraulic support |
| 12/24/2014 | CN204041083U 煤矿井下戗棚支护梁 Closure of coal mine roof support beams |
| 12/17/2014 | CN204024681U 一种手推式采煤工作面辅助切顶装置 A chiral auxiliary push coalface toppers device |
| 12/10/2014 | CN204002871U 一种井下高强度可调节巷道前探梁固定吊环 A downhole high intensity can be adjusted before the probe beam fixed roadway rings |
| 12/10/2014 | CN204002870U 一种超前支护支架用履带顶梁 One kind of advance support bracket Tracked top beam |
| 12/10/2014 | CN204002869U 顶板支护装置 Roof support system |
| 12/10/2014 | CN204002868U 一种矿山掘进用的前探梁 Driving with one kind of mine before the probe beam |
| 08/13/2014 | CN203769814U 巷道支架适应不规则顶板顶梁360°可旋转装置 Roadway support adaptation irregular roof top beam 360 ° rotatable means |
| 08/13/2014 | CN203769808U 坑道如意支撑组件 Hang wishful support assembly |
| 08/13/2014 | CN103982212A 矿用六边形管式抗让吸能防冲装置 Mine hexagonal tube to allow absorption of anti-scour protection device |
| 08/13/2014 | CN102182479B 防开裂的液压支架顶梁唇口 Hydraulic support anti-cracking the top beam lip |
| 07/30/2014 | CN203742635U 一种煤矿用的支护 Supporting a coal mine in |
| 07/23/2014 | CN203730024U 一种液压支架伸缩梁加长结构 A hydraulic telescopic beam extension bracket structure |
| 07/23/2014 | CN203730023U 一种架棚梁装置 One kind of rack shelf beam device |
| 07/23/2014 | CN103939118A 冒落松散岩体内成巷时顶板超前支护的支承装置及其应用 Roof Caved while supporting the body into a loose rock roadway support device and its application |
| 07/09/2014 | CN203702211U 掩护式液压支架及其顶梁自动调节装置 Covering hydraulic bracket and the top beam automatic adjustment device |
| 07/02/2014 | CN203685235U 用螺旋线弧面锁紧连接的销楔式金属顶梁 With a spiral arc wedge locking pin connected metal roof beams |
| 07/02/2014 | CN203685234U 一种组合式抬棚 A modular Roof |
| 07/02/2014 | CN103899340A 前探梁稳固支柱 Before the probe beam solid pillar |
| 06/25/2014 | CN203669897U U型钢前探梁卡子 U-shaped steel beam clamp before the probe |
| 06/18/2014 | CN203655321U 一种搭接隔离式煤矿充填开采的悬移支架 One kind of lap isolated coal mining filling Suspended support |
| 06/18/2014 | CN203655320U 一种用于巷道掘进工作面临时支护的测力前探梁 The former roadway excavation work force when faced with support for the probe beam |
| 06/04/2014 | CN203626862U 煤层开采顺槽巷过乱顶支护装置 Coal mining is too messy top Alley trough support device |
| 06/04/2014 | CN103835726A Roadway supporting method and supporting device |
| 05/21/2014 | CN203603940U 煤矿用大工作阻力液压支架顶梁侧护板 Mine hydraulic resistance with a large support beam work side guards |
| 05/15/2014 | US20140133923 Mine Roof Support Member and Method for Constructing Improved Mine Roof Support Columns |
| 05/07/2014 | CN203584442U 一种棚梁的活动牙口 Activities dental mouth a shed beams |
| 04/30/2014 | CN102518459B High-strength anchor rope steel channel beam capable of yielding automatically for deep well coal roadways |
| 04/23/2014 | CN103742174A Adjustable bracket |
| 04/16/2014 | CN203547768U Telescopic front canopy |
| 04/16/2014 | CN103726860A Hydraulic support and side-push locking mechanism thereof |
| 04/16/2014 | CN102518458B Construction method of top beam part of underground bus stop |
| 03/26/2014 | CN103670463A Hanging type forepoling bar |
| 03/26/2014 | CN103670426A Large-inclination-angle and large-section roadway construction method |
| 03/19/2014 | CN203488196U Top beam for construction of top pipe of underground pipe network |
| 03/12/2014 | CN203476372U Hydraulic support with lengthened top beam |
| 03/12/2014 | CN203476362U Hydraulic support with secondary side wall protection mechanism |
| 01/15/2014 | CN203394551U Adjustable front canopy lifting ring device |
| 01/15/2014 | CN103510972A Pillar connecting device |
| 01/15/2014 | CN103510971A Telescopic forepoling bar |
| 01/15/2014 | CN102444413B Hydraulic support and top beam thereof |
| 01/15/2014 | CN102425431B Ultra-close coal layer mining roadway distributing method |
| 12/25/2013 | CN203362190U Mining dual-energy-absorption strike-resistant beam |
| 12/25/2013 | CN203362189U Novel support type legless canopy |
| 12/11/2013 | CN203335100U Front canopy suspension device |
| 12/04/2013 | CN102242637B Suspension support connection device and suspension support |
| 11/27/2013 | CN203308483U Novel anti-flying angle-adjusting wedge |
| 11/20/2013 | CN203296791U Chapelet for positioning shed |
| 11/20/2013 | CN203296790U Mine support forepoling bar |
| 11/20/2013 | CN203296789U Anchor bolt support front canopy suspension device |
| 11/06/2013 | CN203271783U Hinged spray type front canopy |
| 10/30/2013 | CN203257436U H-section steel anchor cable beam used for roadway support |
| 10/30/2013 | CN203257435U Connecting and fixing clamp for mining metal support |
| 10/16/2013 | CN203239365U Linkage type U-shaped steel support front probe beam clamp |
| 09/25/2013 | CN203214076U Wall caving preventing net for tunneling construction |
| 09/18/2013 | CN103306693A Mining double energy absorption anti-shocking beam |
| 09/18/2013 | CN103306691A Folding type supporting device |
| 09/12/2013 | US20130236250 Fiberglass Roof and Rib Plate |
| 09/11/2013 | CN203189048U Metal hinged top beam |
| 09/04/2013 | CN102261258B Suspension support mounting rack |
| 08/28/2013 | CN203161266U Special ring for mine front canopy |
| 08/21/2013 | CN203145969U Protection device for roadway digging head-on wall caving |
| 08/21/2013 | CN203145968U Fully-mechanized surface upper-and-lower roadway roof support device |
| 08/14/2013 | CN203130123U Snapping-preventive device for two-frame-in-on-group type face end support |
| 07/24/2013 | CN203081469U Coal mine support |
| 07/17/2013 | CN203066998U Leading temporary support device for anchor bolt spray roadway |
| 07/03/2013 | CN103184879A Hanging device for temporary support |
| 06/26/2013 | CN203022776U Temporary supporting device for heating faces |
| 06/26/2013 | CN203022775U Mining adjustable front probe beam fixing connecting device |
| 06/26/2013 | CN203022774U Novel T-shaped canopy of coal mine roadway roof |
| 06/19/2013 | CN103161480A Method for actively supporting lane side filling gob-side entry retaining |
| 06/08/2013 | CA2798313A1 Apparatus and method for re-tensioning a loose roof plate in an underground mine |
| 06/05/2013 | CN202970742U Anti-falling device for roadway advanced support |
| 06/05/2013 | CN102220870B Tunneling head-on temporary support front canopy clip |
| 05/29/2013 | CN202954826U Straining beam of anchoring bracket |
| 05/29/2013 | CN103122768A Supporting method of carboniferous system geologic structure in-zone breaking country rock roadway |
| 05/22/2013 | CN202946169U U-shaped steel fork-type forepoling bar |
| 05/22/2013 | CN202946168U Shed type roadway advanced support device |
| 05/08/2013 | CN202926349U Quick fixing device of U-shaped shed |
| 05/08/2013 | CN202926348U U-shaped shed fixing device |
| 05/08/2013 | CN202926347U Anchor net supporting roadway advance support device |
| 04/17/2013 | CN202882960U Temporary support device for anchor net roadway |
| 04/17/2013 | CN202882959U Rock bolting front canopy device of mine driving face |
| 04/17/2013 | CN202882955U Blasting digging working face single column type forepoling device |
| 04/17/2013 | CN103046939A Leakage-proof stope face roof |
| 04/17/2013 | CN103046937A Mine I-steel trapezoidal shed with bottom beam |
| 04/10/2013 | CN202866837U External extensible beam jack top coal caving support |
| 04/03/2013 | CN202851025U H-section steel U-shaped steel contractible top beam combined support |
| 03/27/2013 | CN202832587U Pneumatic temporary support device |
| 03/27/2013 | CN202832571U Coalface support for similar material simulation test |
| 02/20/2013 | CN202745894U Joist device for supporting coal mine roadway top plate |
| 02/20/2013 | CN202745893U Beam hanging device installation structure for temporary support of excavation working surface |
| 02/20/2013 | CN202745892U Composite telescopic beam mechanism |
| 02/13/2013 | CN102926773A Assembled type concrete block pressing rod beam and using method, production die and production method thereof |
| 02/06/2013 | CN202718691U Shed erecting and beam mounting device for pi-shaped steel shed used in tunnel of coal mine |
| 02/06/2013 | CN202718690U Shed erecting and beam mounting device for U-shaped steel shed used in tunnel of coal mine |
| 01/30/2013 | CN202707091U Hinge type top beam |