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