Patents for E21D 15 - Props; Chocks (3,432) |
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09/11/2013 | CN103291333A Hydraulic support column double-liquid-injection system |
09/04/2013 | CN203175584U Hydraulic column disassembling machine for coal mine |
09/04/2013 | CN203175583U Plug-in type double faced lock for balancing jack |
09/04/2013 | CN203175582U Hydraulic control annular cavity liquid-return low-resistance integrated valve set system |
09/04/2013 | CN103277540A Mining intrinsically safe electric hydraulic control reversing valve |
09/04/2013 | CN103277121A Big board supporting device |
09/03/2013 | US8523145 Jack assembly with integrated pressure relief assembly |
08/28/2013 | CN203161265U Guide sleeve for hydraulic jack |
08/28/2013 | CN203161264U Replaceable triple-purposed valve cylinder seat of mining single hydraulic prop |
08/28/2013 | CN203161263U Anti-falling device for mine H-type steel shed support |
08/28/2013 | CN203161262U Hydraulic pre-warning prop device |
08/28/2013 | CN102213100B Hydraulic prop capable of outputting constant force and repressing method |
08/21/2013 | CN203145968U Fully-mechanized surface upper-and-lower roadway roof support device |
08/21/2013 | CN203145967U Round steel column base |
08/21/2013 | CN203145966U Hydraulic support telescopic beam oil cylinder fixing device |
08/21/2013 | CN203145965U Special column shoe |
08/21/2013 | CN203145964U Novel footrest apparatus of large-inclination-angle hydraulic support |
08/21/2013 | CN203145963U Single hydraulic prop structure |
08/21/2013 | CN103256062A Prompt and warning support column |
08/21/2013 | CN103256061A Coal-mining roadway scour-preventing and energy-absorbing combined metal support and assembly method |
08/21/2013 | CN103255784A Steel support temperature deforming adjuster |
08/21/2013 | CN102444412B Integrated intelligent mine pressure detection warning indicator |
08/21/2013 | CN102242361B Laser cladding method for mining hydraulic support column |
08/14/2013 | CN203130122U Rail clamping device preventing hydraulic bracket from being derailed |
08/14/2013 | CN203130121U Detachable support leg for single hydraulic prop |
08/14/2013 | CN203130120U Coordinated base for mounting of single hydraulic prop |
08/14/2013 | CN203130119U Single hydraulic prop with protecting function |
08/14/2013 | CN203130118U Differential pressure combination valve |
08/14/2013 | CN203130117U Dual-control water spray valve for fully-mechanized coal mining hydraulic support of coal mine |
08/14/2013 | CN203130116U Dual-control water spray valve for fully-mechanized coal mining hydraulic support of coal mine |
08/14/2013 | CN203130115U Lateral limiting device for single hydraulic prop |
08/14/2013 | CN203130114U Single hydraulic prop |
08/14/2013 | CN203130113U Dual-extension individual hydraulic prop |
08/14/2013 | CN203130112U Overall digging and protecting support of soft rock roadway |
08/14/2013 | CN103244155A Hydraulic cylinder control valve without unloading impact resonance |
08/14/2013 | CN103244154A Mining single hydraulic prop safety belt |
08/14/2013 | CN103244153A Hydraulic prop three-way valve insurance device |
08/14/2013 | CN103244152A Hydraulic prop |
08/07/2013 | CN203114307U Structure for assembling and disassembling coal mining fully mechanized mining support for mining three-soft coal bed |
08/07/2013 | CN203114306U Self-exhausting device of mine single hydraulic supporting column |
08/07/2013 | CN203114305U Roadway hydraulic support |
08/07/2013 | CN203114304U Separating type individual hydraulic prop |
08/07/2013 | CN203114303U Placing structure of insertion boards, support and hanging net for tunneling of coal mine underground tunnel |
08/07/2013 | CN203114302U Contractive protective support frame of roadway |
08/07/2013 | CN103233759A Hydraulic support positioning machine |
08/07/2013 | CN102207001B Testing device for pillar socket structure of hydraulic support |
07/31/2013 | CN203097913U Novel liquid injection valve seat |
07/24/2013 | CN203081471U Hydraulic support reversing valve |
07/24/2013 | CN203081470U Hydraulic supporting post dust-proof structure |
07/24/2013 | CN203081469U Coal mine support |
07/24/2013 | CN203075745U Electrically-controlled backwash filter |
07/24/2013 | CN103212235A Electric control backwashing filter |
07/24/2013 | CN101403312B Valve device and support frame including the valve device |
07/17/2013 | CN203066997U Steel support loose end |
07/17/2013 | CN203066996U Hydraulic support and limiting device thereof |
07/17/2013 | CN203066995U Steep coal seam work face double-lane forepoling hydraulic support side protection device |
07/17/2013 | CN203066994U Air pressure supporting column |
07/17/2013 | CN203066993U U-shaped shed frame roadway supporting structure |
07/17/2013 | CN203066992U U-shaped steel frame shed temporary work table used in roadway |
07/17/2013 | CN103206232A Synchronous pre-support and anchorage device for follow-up heading machines |
07/16/2013 | CA2550247C Grout pack restraining system |
07/10/2013 | CN203050742U Coal mine fully-mechanized coal mining support fast removing complete equipment |
07/10/2013 | CN203050741U Automatic control valve |
07/10/2013 | CN203050740U Pressure measurement instrument for single hydraulic prop |
07/10/2013 | CN203050739U Hydraulic roof-cutting pillar |
07/10/2013 | CN203050738U Simple single support column |
07/10/2013 | CN103195452A Self-exhausting device of mineral single hydraulic prop |
07/10/2013 | CN103195451A Cushioning and vibration damping device for support of intelligent well |
07/10/2013 | CN102392660B Three-dimensional pressure-relieving supporting method for prolonging service lives of deep soft rock supports |
07/03/2013 | CN203035207U Single hydraulic prop |
07/03/2013 | CN203033702U Lifting device for being matched with coal mine fully-mechanized mining hydraulic support |
07/03/2013 | CN101864974B Folding single prop |
06/26/2013 | CN203022773U Locking operation mechanism of hydraulic support operation valve |
06/26/2013 | CN203022772U Hinged-type push rod |
06/26/2013 | CN103174710A Grille frame supporting-failure-resistant connector and use thereof |
06/26/2013 | CN103174442A Exchangeable three-use valve cylinder base of mining single hydraulic prop |
06/26/2013 | CN103174441A Adjustable double-resistance energy absorption anti-impact hydraulic support frame |
06/20/2013 | DE102011121247A1 Measuring rod for determining position of piston of hydraulic cylinder for roof support system in underground mines, has multiple detector elements, which are arranged along axis of measuring rod, and are formed by Hall sensors |
06/19/2013 | CN203008933U Mixed double telescoping type single hydraulic prop |
06/19/2013 | CN203008932U Sealable hydraulic support |
06/19/2013 | CN103168147A An improved prop for mining, construction and the like |
06/19/2013 | CN103161482A Revolving platform for turning around hydraulic support |
06/19/2013 | CN103161481A Single hydraulic prop |
06/19/2013 | CN103161480A Method for actively supporting lane side filling gob-side entry retaining |
06/19/2013 | CN101806229B Mine roof safety evaluation method based on multi-target monitoring data fusion |
06/18/2013 | US8465005 Pneumatic multi-weight balancing device |
06/13/2013 | US20130149044 Prop for Mining, Construction and the Like |
06/12/2013 | CN202991072U Two-connecting rod mechanism of hydraulic bracket |
06/12/2013 | CN202991071U Device for replacing hydraulic support upright column of fully mechanized coal mining face of underground coal mine |
06/12/2013 | CN202991070U Single hydraulic prop |
06/12/2013 | CN202991069U Single hydraulic prop |
06/12/2013 | CN202991068U Support force self-adjusting type tunnel top plate hydraulic support monitoring system |
06/12/2013 | CN202991067U In-coal gangue drawing hydraulic support |
06/12/2013 | CN103147775A Mining U-shaped bracket mounting device |
06/12/2013 | CN103147774A Pressure measuring instrument of single hydraulic prop |
06/12/2013 | CN102352759B Emulsion recovery system |
06/12/2013 | CN102116159B Hydraulic support of suspension roof timber capable of adjusting direction |
06/05/2013 | CN202971432U Hydraulic support oil processing device for mine |
06/05/2013 | CN202970784U Coal mine paste filling hydraulic bracket for sealing by using tail boom |
06/05/2013 | CN202970742U Anti-falling device for roadway advanced support |