Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21D - Shafts; Tunnels; Galleries; Large underground chambers › E21D 15 - Props; Chocks
Patents for E21D 15 - Props; Chocks (3,432)
01/2013
01/02/2013CN102061921B Down-dip mining method of shaped hydraulic bracket on long-wall working surface in direction of large dip angle coal bed
12/2012
12/26/2012EP2536919A2 A device for roof support of underground mine/tunnel
12/26/2012CN202628189U Mine ground pressure monitor for stope face
12/26/2012CN202628127U Rotary device of hydraulic support retracing machine
12/26/2012CN202628126U Auxiliary machine for hydraulic support assembly and disassembly
12/26/2012CN202628125U Mining intrinsic safety mine pressure alarming device
12/26/2012CN202628124U Hydraulic support
12/26/2012CN102844523A A device for roof support of underground mine/tunnel
12/26/2012CN102839984A Oversized-section underground supporting structure
12/25/2012US8336856 Threadless quick connect tubular coupling release tool
12/19/2012CN202611728U Hydraulic rope type withdrawal equipment
12/19/2012CN202611727U Hydraulic chain type plastering rack platform
12/19/2012CN202611726U Hydraulic support locating machine turntable mechanism
12/19/2012CN202611725U Fall-preventing device of individual hydraulic prop
12/19/2012CN202611724U Frictional shoes for bottom-uplifting jack of mining hydraulic support
12/19/2012CN202611723U Hydraulic upright column
12/19/2012CN102828759A Moving and support dismantling method for working faces of breaking roofs of mines
12/12/2012CN202596750U Plywood sealing slideway and upright post disassembly and assembly machine
12/12/2012CN202596749U Suspended support installation machine
12/12/2012CN202596748U Mine supporting member capable of rapidly absorbing energy and preventing scouring for avoidance
12/12/2012CN202596747U Special fully-mechanized hydraulic support for across fault layer and tectonic belt of coal bed
12/12/2012CN202596746U Active support miniature constant-resistance tent leg
12/12/2012CN202596745U Self-cutting and self-dismounting metal support
12/12/2012CN202596744U U-shaped pulling rod of coal road shed support
12/12/2012CN102817624A Hydraulic pressure supporting frame dismantling device
12/05/2012CN202578724U Portable tunnel construction steel frame mounting equipment
12/05/2012CN202578723U Monomer hydraulic prop
12/05/2012CN202578722U Piston sleeve for hydraulic prop
12/05/2012CN202578721U High-flow high-pressure safety valve
12/05/2012CN202578720U Mining anchor post
11/2012
11/28/2012CN202560931U Safety rope
11/28/2012CN202560264U Bidirectional hinge type hydraulic support column
11/28/2012CN202560263U Hydropost bearing frame
11/28/2012CN202560262U Plug-in cone seal hand-directional valve
11/28/2012CN202560261U Folding locking device for operating valve of hydraulic support
11/28/2012CN202560260U 500 L/min safety valve for hydraulic support
11/28/2012CN202560259U 1000L/min safety valve for hydraulic support
11/28/2012CN202560258U 200 L/min reversing valve for colliery hydraulic support
11/28/2012CN202560257U Plug-in type middle-flow rigid-seal two-way lock
11/28/2012CN202560256U Plug-in type stand column hydraulic control one-way valve
11/28/2012CN202560255U Inserting type hard sealing bidirectional lock
11/28/2012CN202560254U Hydraulic support column sheath
11/28/2012CN202560253U Bracket linkage fixing pin
11/28/2012CN202560252U Superstable hydraulic support
11/28/2012CN202560251U Elastic prop assembly of mine underground single hydraulic prop
11/28/2012CN202560250U Composite layer single hydraulic prop
11/28/2012CN202560249U Single hydraulic prop
11/28/2012CN202560248U Large-section tunnel forepoling column
11/28/2012CN102797485A Rotary accommodating platform for hydraulic support for fully mechanized mining for coal mine
11/28/2012CN102797484A Horizontal upright column assembling machine for mine
11/21/2012CN202544872U Sealing manual reversing valve with spring resetting cartridge valve pad
11/21/2012CN202544871U Manual change valve with spring return plug-in hard seal
11/21/2012CN202544870U Sealing installation structure for hydraulic prop
11/21/2012CN202544869U Combined enhanced individual hydraulic prop
11/21/2012CN202544868U Anti-impact hydraulic support
11/21/2012CN202544867U Telescopic stay rod
11/21/2012CN102787853A Pop-out proofing device for column valve of hydraulic single column
11/21/2012CN102787852A Vertical column applied on hydraulic support
11/14/2012CN202531198U Bracket pressure measuring device
11/14/2012CN202531197U Hydraulic upright post for hydraulic bracket system
11/14/2012CN202531196U Extension-type point post for supporting roadway
11/14/2012CN202531195U Pull plate for U-shaped steel bracket of coal mine underground roadway
11/14/2012CN202529776U Hydraulic loading and unloading mechanism for pit barring carrier
11/14/2012CN102777194A Anti-tipping device for hydraulic support and hydraulic support
11/14/2012CN102777193A Hollow hydraulic support upright and hydraulic support comprising upright
11/14/2012CN101982629B Assembly-type self-compaction steel tube and concrete composite structure
11/14/2012CN101899986B Hydraulic control one-way valve
11/07/2012CN202520338U Hydraulic support operating valve locking device
11/07/2012CN202520337U Hydraulic control one-way valve
11/07/2012CN202520336U Differential combined valve
11/07/2012CN202520335U Hydraulic control one-way valve
11/07/2012CN202520334U Reversible lock with safety valve
11/07/2012CN202520333U Constant pressure supporting frame with hydraulic connecting component
11/07/2012CN202520332U Embedded type advanced supporting bracket in roof-broken laneway
11/07/2012CN102767384A Mounting turntable for steel penstock in construction hole
11/07/2012CN102767383A Processing method of underground tunnel supporting column
11/07/2012CN101922292B Coal mine gob-side entry retaining roadside segment bearing unequal strength support principle and application
11/07/2012CN101775986B Process for mining thin coal seam containing ferric sulfide nodule and hard dirt band and fully mechanized mining hydraulic support thereof
10/2012
10/31/2012CN202510143U Onboard timbering machine for heading machine
10/31/2012CN202510142U Mining hydraulic bracket base
10/31/2012CN202510141U Hydraulic control one-way valve
10/31/2012CN202510140U Balanced floating reversible lock
10/31/2012CN202510139U Hydraulic control one-way valve
10/31/2012CN202510138U Pilot operated check valve capable of feeding liquid rapidly
10/31/2012CN102758643A Safety valve
10/31/2012CN101936171B Hydraulic support and surrounding rock coupling three-dimensional dynamic design method
10/31/2012CN101793156B Manual boosting setting-force guaranteeing device
10/31/2012CN101775991B Method for significant reduction of bracket support of gob-side roadway of fully-mechanized mining face
10/30/2012US8297888 Hydraulic prop comprising thin-walled exterior and interior pipes
10/26/2012WO2012114308A3 Preloadable support
10/25/2012US20120269585 Pumpable Crib
10/24/2012CN202500587U Telescopic flexible shield support
10/24/2012CN202500586U Novel concrete bridge tower cross beam hollow bracket
10/24/2012CN102748044A Method for assembling single hydraulic prop
10/24/2012CN102748043A Chain ring clamp and hydraulic bracket
10/24/2012CN102748042A Valve-column integrated type hydraulic bracket supporting column for coal mine
10/24/2012CN102748041A Nitrogen safety valve for hydraulic support in coal mine fully mechanized mining
10/17/2012EP2511449A1 Prop with wear indicating means
10/17/2012CN202493278U Portable spiral brace
10/17/2012CN102733830A Support for mine concrete support engineering and support method thereof
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