| Patents for E21F 1 - Ventilation of mines or tunnels; Distribution of ventilating currents (2,288) |
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| 01/12/2011 | CN201705381U Rectangular air duct |
| 01/12/2011 | CN201705380U Circular arc wind tube |
| 01/12/2011 | CN201705379U Ventilation and dust removal device with silencing unit |
| 01/12/2011 | CN101943025A Vertical air shaft explosion protection door capable of quickly resetting |
| 01/12/2011 | CN101943017A Air distributing device and coal mine comprehensive digging working surface air distributing and dust reducing system |
| 01/05/2011 | CN201698562U Multifunctional switch of mining underground air door alarm |
| 01/05/2011 | CN201696075U Multifunctional adjustable latitude and longitude air door |
| 01/05/2011 | CN201696074U Coal vertical shaft tunneling working surface double-fan double-power ventilation system |
| 01/05/2011 | CN201696073U Coal mine underground air funnel dust elimination and cooling device |
| 01/05/2011 | CN101936259A Wind power utilization method and special device in wind discharge barrel of mine |
| 01/05/2011 | CN101936177A Wind tube wind quantity switch |
| 12/29/2010 | CN201687521U Opening system for pressure relief window |
| 12/29/2010 | CN201687505U Mine automatically closed explosion-proof door |
| 12/29/2010 | CN201687504U Horizontal pull type and reverse direction air door with two swings in mines |
| 12/29/2010 | CN101929336A Improved dedicated track for pipe installation in tunnel |
| 12/29/2010 | CN101418699B Underground mine natural ventilation equipment |
| 12/22/2010 | CN201679772U Air intake end of novel plate-type silencer sheet |
| 12/22/2010 | CN201679512U Split type electric control pneumatic anti-clamping air door |
| 12/22/2010 | CN201678888U Large-width rubber air duct fabric for mine |
| 12/22/2010 | CN101922309A Method for preventing mine gas from exploding and implementation device thereof |
| 12/22/2010 | CN101922304A Safe wingspan-type monitoring and alarming system of automatic on-off ventilation wind pressure for mine |
| 12/22/2010 | CN101922292A Coal mine gob-side entry retaining roadside segment bearing unequal strength support principle and application |
| 12/15/2010 | CN201671651U Wind quantity switch of wind barrel for coal mine |
| 12/15/2010 | CN201671004U Mine rubber air duct cloth |
| 12/15/2010 | CN201671003U Impact-resistant rubber fabric for air ducts |
| 12/15/2010 | CN101413398B Heating start-up system of mine ventilation air methane oxidized apparatus |
| 12/08/2010 | CN101906986A Method for distributing intake airflow and exhaust airflow of coal mine methane device |
| 12/08/2010 | CN101235724B Express highway adjoining tunnel linkage aeration control method |
| 12/08/2010 | CN101105105B Built-in type rain-screening aeration jalousie |
| 12/01/2010 | CN201661312U Mine compressed-air intelligent monitoring device |
| 12/01/2010 | CN201661309U Railway single-track diesel traction tunnel operation ventilation device |
| 12/01/2010 | CN101899989A Plate type fence segmentation and diversion muffler |
| 11/25/2010 | WO2010104331A3 Roof type high-speed tunnel air cleaning system |
| 11/24/2010 | CN201650336U Pneumatic crowding protection device |
| 11/24/2010 | CN201650335U Mine air duct protecting device |
| 11/24/2010 | CN101387357B High strength fibre reinforced ventilating duct and use thereof |
| 11/17/2010 | CN201635769U Working state monitoring and fault prediction system of mine fan |
| 11/17/2010 | CN201635757U Double-cuff four-fastener air duct joint air leakage-proof device |
| 11/17/2010 | CN201635756U Mine ventilation system |
| 11/17/2010 | CN101886548A Polyurethane composite material hair dryer and manufacturing method thereof |
| 11/16/2010 | US7832338 Exhaust intake bonnet for capturing exhausts from diesel-powered locomotives |
| 11/10/2010 | EP2247828A1 Method for controlling longwall mining operations, taking into account air and air conditioning resources |
| 11/10/2010 | CN101419444B Intelligent control switch for local ventilation system |
| 11/03/2010 | CN201620908U Automatic air door electric control device |
| 11/03/2010 | CN201620907U Double-layer translational automatic control throttle device for coal mine |
| 11/03/2010 | CN201620906U Tumbler-type air door sill |
| 11/03/2010 | CN201620905U Non-pressure automatic air door for monorail crane locomotive laneway |
| 11/03/2010 | CN201620904U Pressure-release air door |
| 10/27/2010 | EP2243925A1 Apparatus for filtering air in tunnels |
| 10/27/2010 | CN101871358A Novel mine air door pneumatic locking device |
| 10/27/2010 | CN101871357A Automatic wind door for positive wind and opposite wind of mine |
| 10/27/2010 | CN101871356A U+H type ventilation system |
| 10/21/2010 | US20100267324 Airflow regulator |
| 10/20/2010 | CN201610766U 煤矿风井防爆门自动开闭装置 Mine explosion-proof air shaft door opening and closing device automatically |
| 10/20/2010 | CN101864981A Local cooling method and cooling fan for mine |
| 10/20/2010 | CN101864980A New type mining air door hydraulic locking device |
| 10/20/2010 | CN101864979A Air curtain group for mine laneway |
| 10/20/2010 | CN101864978A Method for determining ventilation on-way resistance of curved tunnel |
| 10/13/2010 | CN201606101U 矿用通风灭尘一体化装置 Mine ventilation eliminate dust Integrated Device |
| 10/13/2010 | CN201606100U 高速公路隧道通风变频控制系统 Highway tunnel ventilation frequency control system |
| 10/06/2010 | CN201599063U 立井井筒掘进通风风压监控报警系统 Mine Shaft Driving Ventilation pressure monitoring alarm system |
| 10/06/2010 | CN201599062U 报警装置和风门报警系统 Alarm devices and alarm systems damper |
| 10/06/2010 | CN201599047U 无压风门 No pressure damper |
| 10/06/2010 | CN101852163A Multifunctional hydraulic-power ventilation heat exchanger |
| 09/29/2010 | CN201593449U Sensor for failure of tunnel ventilation pipeline and on/off of air blower |
| 09/29/2010 | CN201593440U Safety ventilation door with full automatic locking function |
| 09/29/2010 | CN201593439U Ventilation device for inclined shaft middle baffle board construction |
| 09/29/2010 | CN101845960A Ventilation air methane countercurrent oxidation device with flue gas suction device |
| 09/22/2010 | CN201588652U Dedusting device for manual excavation pile operation |
| 09/22/2010 | CN201588493U Non-pressure panoramic regulation wind window for mining |
| 09/22/2010 | CN101842553A Optimized mine ventilation system |
| 09/16/2010 | WO2010104331A2 Roof type high-speed tunnel air cleaning system |
| 09/15/2010 | CN201581915U Push-pull arc throttle setting |
| 09/15/2010 | CN101832150A Ultra thick coal bed fully mechanized underground mining protection process and special protection supporting frame |
| 09/08/2010 | CN201574780U Car arrester |
| 09/08/2010 | CN201574771U Single-board balanced type stepless adjusting air window |
| 09/08/2010 | CN201574770U Positive and negative air door device |
| 09/08/2010 | CN101824998A Double-direction relief damper |
| 09/08/2010 | CN101824997A Arrangement method for double-uphill air return of mining areas of mine |
| 09/01/2010 | CN201568081U Device for realizing reliable communication and provision in pit |
| 09/01/2010 | CN201568070U External air door |
| 09/01/2010 | CN201568069U Three input and three output concentrating tunnel of coal mine downhole large-area panel |
| 09/01/2010 | CN101476474B High-speed thermal circulation air curtain apparatus for tunnel portals |
| 08/25/2010 | CN201560986U Cooling device for auxiliary mine axial flow fan |
| 08/25/2010 | CN201560788U Pressure-reducing balancing valve device for opening coal mine underground air door |
| 08/25/2010 | CN201560787U Coal mine underground pressure-resistant air door |
| 08/25/2010 | CN201560786U Anti-drag counter weight device for throttle vertical gate |
| 08/18/2010 | CN201554486U High strength film laminated bamboo plywood mining air door |
| 08/18/2010 | CN201554485U Ventilating device of raise driving pipeline |
| 08/18/2010 | CN101307692B Sharply inclined coal seam mining method |
| 08/18/2010 | CN101235723B Express highway section multi- tunnel gathering type intelligent aeration control method |
| 08/12/2010 | DE102009008516A1 Method for securing upper end of mine-duct filled with poriferous mass against breakage of ground, involves filling of reinforced and non-reinforced concrete in hollow drill that is pulled before concrete solidification |
| 08/11/2010 | CN201546747U Mining main fan intelligent brake |
| 08/11/2010 | CN201546746U Stepless-regulation insert-plate windshield |
| 08/11/2010 | CN201546745U Anti-blast composite-material hard air tube |
| 08/11/2010 | CN101798936A Rocker self-locking device of an air door |
| 07/28/2010 | CN101787987A Fan blades of integral mine fan and preparation method thereof |
| 07/21/2010 | EP2208857A2 Adjustable ventilation flap |
| 07/14/2010 | CN201526333U Mining air door self-opening and self-closing integrated device |
| 07/14/2010 | CN201526332U Control device of hub pressure sensing automatic air door |