| Patents for E21F 1 - Ventilation of mines or tunnels; Distribution of ventilating currents (2,288) |
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| 02/13/2013 | CN202731963U Fan station capable of ventilating by use of natural wind pressure of metal mine |
| 02/13/2013 | CN102926792A Air locking device of air doors for mine |
| 02/13/2013 | CN102926594A 风门闭锁装置及风门闭锁系统 Throttle and throttle locking device locking system |
| 02/13/2013 | CN101832150B Ultra thick coal bed fully mechanized underground mining protection process and special protection supporting frame |
| 02/06/2013 | CN202718701U Frost damage preventing system of coal mine air duct |
| 02/06/2013 | CN102913270A Radon gas removing system suitable for underground tunnels |
| 02/06/2013 | CN102913269A 隧道通风装置 Tunnel ventilation |
| 02/06/2013 | CN102913081A Mechanical interlocking device |
| 01/30/2013 | CN202707551U Intelligent ventilation energy-saving control system for medium-long tunnel |
| 01/30/2013 | CN202707118U Wind shielding device for ditch of air door wall |
| 01/30/2013 | CN202707117U Novel locking device of air door for coal mine ventilation |
| 01/30/2013 | CN202707116U Double air blower wind cylinder automatic transferring device |
| 01/30/2013 | CN202707115U Safety ventilation system for coal industry mine ground gas drainage pump station |
| 01/30/2013 | CN102900455A Six-in-one intelligent full-automatic lifting roller shutter type air door system |
| 01/30/2013 | CN102900454A Air duct connecting device |
| 01/30/2013 | CN102900453A Mining gas backflow-preventing wind cone device |
| 01/30/2013 | CN102900452A Technique for cooling deep mining area by using ground temperature of shallow goaf and waste roadway |
| 01/30/2013 | CN102900451A Hanging scaffold air distribution system |
| 01/29/2013 | CA2487200C Mine door system with trigger-actuated latch mechanism |
| 01/23/2013 | CN202690117U Ventilation air collecting and mixing system |
| 01/23/2013 | CN202690105U Electric control device for ventilation door blocking device |
| 01/23/2013 | CN202690104U Underground regulation wind window |
| 01/23/2013 | CN202690103U Suspension device of shield tunnel draught fan |
| 01/23/2013 | CN202690072U Mining roadway structure capable of preventing corner gas on coal mining work face from accumulating |
| 01/23/2013 | CN202685420U Anti-adsorption air duct cloth surface structure |
| 01/23/2013 | CN102889092A Multi-stage station ventilation technical system of mine |
| 01/23/2013 | CN102889091A Tunnel turning frequency-variable ventilating method |
| 01/23/2013 | CN102080563B Air door whistling and vehicle blocking device for mine main transportation roadway |
| 01/16/2013 | CN202673323U Air door locking device for coal mine |
| 01/16/2013 | CN202673322U Air drum |
| 01/16/2013 | CN202673321U Novel ventilation experimental model for road tunnel |
| 01/16/2013 | CN202673320U Device for rapidly controlling and adjusting air quantity of mine laneway |
| 01/16/2013 | CN202673319U Movable natural ventilation and gas collector for underground mines |
| 01/16/2013 | CN102877886A Fan drum hanging method, suspended fan drum component and system |
| 01/16/2013 | CN102155250B Self-reset explosion-proof door |
| 01/09/2013 | CN202659283U Carbon monoxide monitoring device for mine |
| 01/09/2013 | CN202659270U Underground traffic air door |
| 01/09/2013 | CN102865099A Under-building, under-railway and under-water mining filling process |
| 01/09/2013 | CN102865096A Ventilation air methane (VAM) suction device |
| 01/09/2013 | CN102865093A Mine ventilation automatic detection and operation system |
| 01/09/2013 | CN102865092A U+U type laneway ventilating system of coalface |
| 01/02/2013 | CN202645635U Air pipe sensor fault warning device |
| 01/02/2013 | CN202645620U Device automatically controlling coal mine gas explosion |
| 01/02/2013 | CN202645613U An air dehumidification and purification device |
| 01/02/2013 | CN202645612U Coal mine compound mechanical limiting sleeve air door interlocking device |
| 01/02/2013 | CN202645611U Pressing-rope wheel for air door |
| 01/02/2013 | CN202645366U Novel grille type ventilating window structure with integrally punched frame and blades |
| 01/02/2013 | CN102852543A Film-coated bamboo plywood non-pressure ventilation door and production method thereof |
| 01/02/2013 | CN102080558B Purification and exhaust method for road tunnel without air shaft |
| 12/26/2012 | CN202628183U Exhaust ventilation anti-explosion door of coal mine vertical shaft |
| 12/26/2012 | CN202628160U System for realizing long-time uniform cooling in high-temperature stope face of mine |
| 12/26/2012 | CN202628159U Angular travel control rotary automatic ventilation door |
| 12/26/2012 | CN202628158U Main fan air door sealing device |
| 12/26/2012 | CN202628157U Automatic integrated interlocking device for air doors of coal mine |
| 12/26/2012 | CN202628156U Warning air draft barrel |
| 12/26/2012 | CN202628155U Integral-type window frame structure of tunnel facility protection |
| 12/26/2012 | CN202628154U Coal mine ventilation intelligent management system |
| 12/26/2012 | CN102840190A Air cylinder special for preventing from clamping persons for underground air door of coal mine |
| 12/20/2012 | US20120319452 Apparatus and method for mining coal |
| 12/19/2012 | CN202611743U Adjustable air brattice for mines |
| 12/19/2012 | CN202611742U Air door for mines |
| 12/19/2012 | CN202611741U Air door locking device |
| 12/19/2012 | CN202611740U Heat preservation wind cylinder applied to borehole operation |
| 12/19/2012 | CN202611739U Mine air quality comprehensive index and ventilation energy-saving linked system |
| 12/19/2012 | CN202611738U Downhole preheating system of underground mine in winter |
| 12/19/2012 | CN202611737U Air ducting device of underground preheating system in underground mine in winter |
| 12/19/2012 | CN102828766A Fault prevention and control device for local ventilation system on driving face of coal mine |
| 12/19/2012 | CN102828765A Urban tunnel pollution discharge structure with fan room and a plurality of low booths |
| 12/19/2012 | CN102086765B High-sublevel multi-layer mining method of ultrathin copper ore body |
| 12/12/2012 | EP2531778A1 Air curtain |
| 12/12/2012 | CN202596767U Air barrel back-flow preventing device and air barrel |
| 12/12/2012 | CN202596766U Simulation test device for testing frictional resistance coefficient of curve tunnel ventilation |
| 12/12/2012 | CN202596765U Integral type tunnel ventilating device |
| 12/12/2012 | CN202596410U Air-controlled device for throttle control |
| 12/12/2012 | CN102817627A Adjustable air flow distribution device |
| 12/12/2012 | CN101476475B Ventilation method for chief wind road on fire |
| 12/06/2012 | US20120309283 Underground Mine Ventilation System |
| 12/05/2012 | CN202578787U Mine double-air-door alarm control device |
| 12/05/2012 | CN202578747U Divided ventilation and smoke discharge device |
| 12/05/2012 | CN202578746U Combined wall-climbing iron air tube |
| 12/05/2012 | CN202578745U Passenger car toilet |
| 12/05/2012 | CN202578744U Automatic converting device for mining double fans and double power supplies |
| 12/05/2012 | CN102808641A Compression resistant air door in underground mine |
| 12/05/2012 | CN102808640A Fan |
| 11/29/2012 | WO2012160219A1 System for securing noise dampers to a fan casing |
| 11/28/2012 | CN202563284U Coal mine adaptive ventilator system |
| 11/28/2012 | CN202560602U Mine non-blowing-out system device in fan performance test |
| 11/28/2012 | CN202560290U Air door system |
| 11/28/2012 | CN202560289U Coal mine underground throttle buffer closing device |
| 11/28/2012 | CN202560288U Anti-blasting-shock-wave air door of mine |
| 11/28/2012 | CN202560287U Air door automatically-closing device |
| 11/28/2012 | CN202560286U Device special for connecting and fastening air duct of fan |
| 11/28/2012 | CN202560285U Dust-control fan drum for coal mining machine |
| 11/28/2012 | CN202560284U Goaf flow field simulation experimental device of fully mechanized caving face in various ventilation modes |
| 11/28/2012 | CN202560283U Coal mine gas, explosion smoke and dust separation and ventilation device |
| 11/28/2012 | CN102797493A Mechanical blasting automatic gas and water sprayer |
| 11/28/2012 | CN102797491A System and method for monitoring dynamic disaster of coal mine with fiber bragg gratings |
| 11/28/2012 | CN102797490A Air supply system |
| 11/28/2012 | CN102797469A Method for constructing inclined shaft by applying TBM (Tunnel Boring Machine) with earth pressure balancing function |
| 11/28/2012 | CN101743445B Fan assembly |