| Patents for E21F 1 - Ventilation of mines or tunnels; Distribution of ventilating currents (2,288) |
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| 04/15/2009 | CN201221481Y Structure integrated disrotatory type local fan |
| 04/15/2009 | CN201221376Y Non-pressure quantitative controllable adjusting wind window |
| 04/15/2009 | CN201221375Y Air duct banding machine |
| 04/09/2009 | WO2009045829A1 Atmosphere handling system for confined volumes |
| 04/08/2009 | CN101403391A Novel duplicate-power double-fan intelligent monitoring protection device |
| 04/01/2009 | CN201215024Y Automatic switching air door |
| 03/31/2009 | US7511625 Mine safety system |
| 03/26/2009 | US20090078433 Method of Controlling Mine Fires with Polymeric Gel |
| 03/25/2009 | CN201212400Y Dust remover for mine |
| 03/25/2009 | CN101394916A Denitrification apparatus and denirification equipment for tunnel |
| 03/18/2009 | CN101387357A High strength fibre reinforced ventilating duct and use thereof |
| 03/05/2009 | WO2009028771A1 High speed tunnel fan with electrostatic filter |
| 03/05/2009 | CA2698148A1 High speed tunnel fan with electrostatic filter |
| 03/05/2009 | CA2668777F Optimized mine ventilation system |
| 03/04/2009 | CN201202487Y Dust removing noise reducer of mining ventilation shaft air exit |
| 03/04/2009 | CN101377454A Method for comprehensively evaluating mine ventilation system based on gray cluster analysis |
| 02/28/2009 | CA2599471A1 Underground communication network system for personal tracking and hvac control |
| 02/26/2009 | DE102007040237A1 Air extraction system for active combating of fire in traffic tunnel creates oppositely-directed airflows from both directions after outbreak of fire and directs these to source of fire or smoke at calculated speed |
| 02/18/2009 | CN101368483A Ventilation construction method for pressure regulating distribution chamber in tunnel auxiliary pilot pit |
| 02/18/2009 | CN100462523C Gob-side entry retaining Y-type ventilation goaf top plate pressure relief gas pumping mining method |
| 02/12/2009 | US20090042504 Tunnel cover for a tunnel for controlled ventilation of gas |
| 02/04/2009 | CN101358533A Multifunctional window for mine air door |
| 01/28/2009 | CN201187322Y Automatic locking apparatus of downhole non-pressure balance air door for mining |
| 01/28/2009 | CN201187321Y Digging wind pipe for mining |
| 01/28/2009 | CN101353967A Mine compressed air self-help apparatus |
| 01/28/2009 | CN101353963A Vacant field coal excavating method of high-dipping coal bed slotted hole blasting unmanned operation working face |
| 01/22/2009 | WO2009010864A2 Underground mine ventilation curtain or barrier |
| 01/22/2009 | CA2688228A1 Underground mine ventilation curtain or barrier |
| 01/21/2009 | CN201184209Y Cellular linear wind-dividing machine |
| 01/21/2009 | CN101349158A Energy-saving environment protection type tunnel automatic exhauster |
| 01/21/2009 | CN101349157A Integral organic glass fiber reinforced plastic wind pipe and manufacture thereof |
| 01/14/2009 | CN201180557Y Mining parallel sliding throttle |
| 01/07/2009 | CN101338685A Elevated plain mine artificial supercharging and aeration method |
| 12/31/2008 | WO2009000531A2 Method for eliminating smoke from and ventilating an underground train station |
| 12/24/2008 | WO2008154702A1 Fan assembly |
| 12/24/2008 | CN201170110Y Double-blower fan double-power supply iron automatic wind division machine |
| 12/24/2008 | CN101328812A Wind pressuring arrangement method of deep well and mine |
| 12/18/2008 | WO2008154361A1 Mine seal with adhesive |
| 12/18/2008 | WO2008152795A1 Air purification device |
| 12/17/2008 | CN201165875Y Anti-collision type air door |
| 12/17/2008 | CN101324192A Ventilated wind pipe |
| 12/10/2008 | CN201162688Y Novel impeller ventilation fan especially for tunnel |
| 12/09/2008 | CA2259346C Mine fire and emergency warning stench injector |
| 11/27/2008 | US20080293350 Ventilation System for Tunnel Section or Covered Road |
| 11/26/2008 | CN101311211A Polyethylene pipes for underground mine use |
| 11/19/2008 | CN101307692A Sharply inclined coal seam mining method |
| 11/12/2008 | CN201148878Y Double-fan opposite opening type pneumatic interlock air door |
| 11/12/2008 | CN201148877Y Pneumatic power interlock air door |
| 11/12/2008 | CN101302931A Method for extracting rim angle coal and re-extracting after warehouse coal extracting |
| 11/05/2008 | CN201144710Y Gasproof type plastic-steel interface for wind pipe |
| 10/29/2008 | CN201141309Y Inverted ventilation fire protection device for mine belt transportation lane |
| 10/29/2008 | CN201141308Y Mine air-increasing device |
| 10/23/2008 | WO2008125053A1 Para-aramid ventilation pipe |
| 10/23/2008 | CA2682270A1 A p-aromatic polyamide vent duct and its application, and application of p-aromatic polyamide to the vent duct |
| 10/16/2008 | US20080254733 Airflow Regulator |
| 10/16/2008 | US20080253841 Hydraulically powered door and systems for operating same in low-temperature environments |
| 10/15/2008 | CN201133257Y Automatic control non-pressure air door |
| 10/15/2008 | CN101285544A P-aramid air-duct and uses thereof, and uses of p-aramid in air-duct |
| 10/15/2008 | CN101285395A Flexible pneumatic air door of mine laneway |
| 10/15/2008 | CN101285394A Tunnel ventilation communication system and its wind power distribution and regulating method |
| 10/01/2008 | CN201125746Y Pressing type disrotatory explosion preventing portable blower |
| 10/01/2008 | CN101275468A City tunnel shaft type natural ventilation and smoke-discharging proof method |
| 09/24/2008 | CN201121526Y Shock-absorbing anti-collision mechanism |
| 09/24/2008 | CN101270670A Front and back opening/closing split type self-controllable power throttle |
| 09/24/2008 | CN101270669A Improved tunnel smoke discharging method and tunnel fume discharging system with independent fume discharging device |
| 09/10/2008 | CN201113467Y Mining working face local fan moving intelligent generating plant |
| 09/03/2008 | CN201110188Y Automechanism interlocking device |
| 09/03/2008 | CN201110187Y Decompression type automechanism interlocking throttle |
| 09/03/2008 | CN201110186Y Pressure relief device for bidirectional handle rotating window blind |
| 09/03/2008 | CN201110185Y Leaking-wind protection apparatus for coal mine |
| 08/27/2008 | CN101251023A Mining parallel push-and-pull throttle |
| 08/20/2008 | EP1957752A1 Ventilation system for tunnel section or covered road |
| 08/20/2008 | CN201103405Y Latch type pneumatic wind gate interlocking device |
| 08/20/2008 | CN201103404Y High-pressure water gas jet current secondary rotating ventilator |
| 08/20/2008 | CN201103403Y Tableland tunnel ventilation air preheating device |
| 08/20/2008 | CN201103402Y Mine down-hole tunnel ventilating device |
| 08/20/2008 | CN101246364A Double-local fan fault diagnosis and automatic switching closedown integrated device |
| 08/19/2008 | CA2415531C Mine door installation |
| 08/13/2008 | CN201100134Y Press strap wind flow adjuster |
| 08/13/2008 | CN201100133Y Micro resistance wind gate |
| 08/13/2008 | CN201100132Y Tunnel ventilation volume adjustment and shunt three pass |
| 08/06/2008 | CN201095988Y Mine ventilating fan remote on-line monitoring system |
| 08/06/2008 | CN201095987Y Underground tunnel blower unit |
| 08/06/2008 | CN101235725A Mine universal air door for positive and reverse wind |
| 08/06/2008 | CN101235724A Express highway adjoining tunnel linkage aeration control method |
| 08/06/2008 | CN101235723A Express highway section multi- tunnel gathering type intelligent aeration control method |
| 07/23/2008 | CN201090233Y Automatic doorsill |
| 07/23/2008 | CN201090232Y Open ultra-low wind well setting structure for underground wind channel |
| 07/23/2008 | CN101225746A Laneway type ventilating technique for long and large tunnel |
| 07/16/2008 | CN101220749A Method for controlling gas of mountain angle and worked-out section by one-in one-out and alternate tail lane ventilation mode |
| 07/09/2008 | CN101215974A Jetting flow blower fan suspension system anchoring piece and anchoring system applying the anchoring piece |
| 07/09/2008 | CN101215973A Tunnel construction jet flow laneway ventilation method |
| 07/01/2008 | US7393025 Mine door system with trigger-actuated latch mechanism |
| 06/25/2008 | CN201078238Y Regulation window ventilator |
| 06/25/2008 | CN100396883C Step distributed downhole parellel blowing fan station |
| 06/11/2008 | CN201071733Y Bidirectional opening wind pressure balance rotating air gate |
| 06/11/2008 | CN201071732Y Ventilation structure used for low wind well |
| 06/11/2008 | CN201071731Y Exhausting and purifying mechanism of tunnel low wind well |
| 06/11/2008 | CN101196121A Polyurethane composite material wind pipe |
| 06/04/2008 | CN201069521Y Dual-power automatic switching intelligent gas control system for mine |