| Patents for E21F 1 - Ventilation of mines or tunnels; Distribution of ventilating currents (2,288) |
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| 02/21/2007 | CN1916368A Method and equipment for recycling heat of returned air in mineral well |
| 02/15/2007 | DE10136096B4 Vorrichtung und Verfahren zum Erfassen und Absaugen von Luft und anderen Gasen Apparatus and method for detecting and extracting air and other gases |
| 02/07/2007 | CN2866823Y Pneumatic locking non-pressure air door |
| 01/24/2007 | CN1900487A Anti-risk and rescue technology for mine |
| 01/17/2007 | CN2858957Y Interlock device for mine air door |
| 01/17/2007 | CN2858956Y Handle for mine air door |
| 01/11/2007 | US20070010190 Foundation vent |
| 12/28/2006 | WO2006135951A1 Tunnel barrier |
| 12/20/2006 | CN2849172Y Electro hydraulic biopening differential throttle |
| 12/13/2006 | CN1877081A Ventilation device with entry driving unit and connection portion for driving headings |
| 12/07/2006 | DE102005023723B3 Faltenschlauch aus verformbarem Material Creased tube of deformable material |
| 12/06/2006 | CN2844443Y Automatic electromagnetic throttle locker |
| 11/30/2006 | DE102006017673A1 Unit for watering of stretches in underground mountain and tunnel structures involving feed machine with freshwater/air tube channel that has ventilator and de-dusting/air tube channel that operates in front of workface |
| 11/29/2006 | CN1869403A Safety coal mining and gas production method with separated air way |
| 11/22/2006 | CN1865662A Smoke emission method in tunnel and tunnel ventilation system with separate smoke-emission device |
| 11/01/2006 | CN2833113Y Full-crosslinked double air door |
| 10/19/2006 | WO2006108228A1 Airflow regulator |
| 10/19/2006 | CA2604747A1 Airflow regulator |
| 10/18/2006 | CN2828316Y Rubber air duct for preventing hitted by gun for mine |
| 10/11/2006 | CN2825956Y Interlocked alarming air door |
| 10/11/2006 | CN2825955Y Negative pressure seamless air duct |
| 10/11/2006 | CN1844676A Rotary disk distributing air and jet disturbing type hydraulic fan |
| 10/10/2006 | US7118472 Control system for pneumatically-powered door installation |
| 10/03/2006 | CA2348348C Balanced ventilation doors |
| 09/21/2006 | DE19905815B4 Vorrichtung zum Bergen einer Lutte Means for retrieving a Lutte |
| 09/20/2006 | CN2819555Y Vacuum electromagnetic starter of fan for coal mine bureau |
| 09/20/2006 | CN2818785Y Non-pressure damper |
| 08/23/2006 | CN2809220Y Wind gate locking device |
| 08/16/2006 | CN2806768Y Air door locking device |
| 08/16/2006 | CN2806767Y Intelligent partial ventilating system for mine |
| 08/09/2006 | CN2804391Y Auto-controlled air throttle |
| 08/03/2006 | US20060172683 Air Deflecting mine ventilation structure |
| 08/03/2006 | DE10210769B4 Absaugvorrichtung Suction |
| 08/02/2006 | CN2802082Y Water circulation protection system of underground gasification furnace |
| 07/19/2006 | CN2797635Y Hydraulic air door closing device |
| 07/12/2006 | CN2795445Y Single sash two-way pressure bearing regulating main air door of coal mine |
| 07/12/2006 | CN1800585A Coal mine gas explosion preventing method |
| 07/05/2006 | CN2793992Y Electromagnetic starter of fan working in driving face of coal mine |
| 06/14/2006 | CN1786415A Stell cable chain band type combined mining machine with driving, conveying, ventilating and signalling functions |
| 05/24/2006 | CN1776196A Method and system for accessing subterranean deposits from the surface |
| 05/12/2006 | CA2523612A1 Anchored mine ventilation structure |
| 05/10/2006 | CN2779292Y Strong power air duct for ventilating dust-removing energy-saving |
| 05/03/2006 | CN1766286A Quick closing wall |
| 05/02/2006 | US7037105 Heating apparatus for wells |
| 04/27/2006 | WO2006043889A1 A tunnel cover for a tunnel for controlled ventilation of gas |
| 04/27/2006 | CA2584729A1 A tunnel cover for a tunnel for controlled ventilation of gas |
| 04/05/2006 | CN2769522Y Gas discharging life-saving pipe |
| 04/05/2006 | CN2769516Y Articulated lining bogie |
| 03/01/2006 | EP1630349A1 Intermediate ceiling for a tunnel and method for its construction |
| 02/15/2006 | CN2758487Y Tunnel fire control smoke exhausting blast hole |
| 02/09/2006 | DE202005018355U1 Tunnel cover has lock element in form of plate movable in plane of tunnel cover that can be moved with device for opening passages in cover in its longitudinal plane to open associated passages |
| 02/08/2006 | CN2756830Y Chain driven slide air door |
| 02/01/2006 | CN2755323Y Mineral dual rotating radial jet ventilating device with single hydraulic motor |
| 01/05/2006 | DE102004027761A1 Intermediate ceiling for use in road tunnels, includes controllable closing components for plugging or opening intermediate ceiling to release air or flue gases from inside road tunnel |
| 12/28/2005 | CN2748641Y Single-leaf two-way bearing and regulating main air door for coal mine ventilation |
| 12/15/2005 | DE102004026428A1 Exhauster for use in road tunnel, has ventilator stimulated by suction pipe in exhaust pipe and including conveying blades, where cross section at downstream of ventilator changes its shape from circular surface area into oval surface area |
| 12/07/2005 | CN2744835Y Hydraulic treatment device for gas accumulation in cut hole |
| 11/29/2005 | CA2322064C Adjustable stairway for use with an overcast in a mine |
| 10/26/2005 | EP1399645B1 Suction device comprising a fire protection system |
| 10/18/2005 | US6955594 Mine door system including an air pressure relief door |
| 10/13/2005 | US20050224223 Heating apparatus for wells |
| 10/12/2005 | CN2732997Y Telescopic air duct end device |
| 10/11/2005 | CA2330820C Mine ventilation |
| 10/05/2005 | CN2731108Y Switch device for tunnel wind gate of downhole of coal mine |
| 10/05/2005 | CN1676877A Adjacent coal face alternating layout coal-mining method |
| 08/24/2005 | CN1657745A Coal-minin method of high-dipping thick seam |
| 08/17/2005 | EP1395736B1 Suction device for a tunnel |
| 08/16/2005 | CA2288597C Mine stopping having a swinging door |
| 08/03/2005 | CN1648414A Method for preventing mine lane gas from explosion and device for realizing said method |
| 08/03/2005 | CN1648412A Ventilation system for high gas comprehensive production and caving down roof coal working surface |
| 07/14/2005 | DE10359540A1 Vorrichtung und Verfahren zur Bestimmung der Strömungsgeschwindigkeit Apparatus and method for determining the flow velocity |
| 07/06/2005 | CN2707967Y Linkage drift air door |
| 07/05/2005 | CA2265402C Door system for a mine stopping |
| 06/22/2005 | EP1544623A1 Device and method for determining flow velocity |
| 06/22/2005 | EP1544408A1 A system for exhausting flue gases in a tunnel |
| 06/22/2005 | EP1544402A2 Sliding door for narrow spaces and for pressure forces on the closure |
| 06/15/2005 | CN2704705Y Automatic switching apparatus of total wind pressure and local ventilator |
| 05/12/2005 | US20050099020 Mine door system with trigger-actuated latch mechanism |
| 05/12/2005 | CA2487200A1 Mine door system with trigger-actuated latch mechanism |
| 05/10/2005 | CA2804825A1 Mine ventilation panel system |
| 05/04/2005 | CN2697317Y Intelligent switching starter for miner blowing fan |
| 04/27/2005 | EP1525129A1 Method and device for determining flow conditions in a 3-dimensional network system |
| 04/20/2005 | CN1198046C Working face J-type ventilating system |
| 04/06/2005 | CN2690598Y Induced draught distributing valve in the pit of mine |
| 03/16/2005 | CN1594836A Device for keeping plateau tunnel thermal stability |
| 03/09/2005 | CN2683853Y Coal mine down-hole air door interlocking equipment |
| 03/02/2005 | CN1587647A Chain driven slide automatic air valve |
| 02/16/2005 | CN1580493A Two-hole one-way side-pressure ventilation smoke-discharging method for road tunnel |
| 02/10/2005 | DE19646766B4 Verfahren und Vorrichtung zur Reinigung von Partikeln und Schadgasen Method and apparatus for cleaning particles and gaseous pollutants |
| 02/10/2005 | DE10136096A1 Smoke/fume suction extraction system for a road tunnel, has a spray system at the eddy hoods to generate a spray mist of fluid droplets against or across the suction flow into the hoods |
| 01/26/2005 | CN2674098Y Local fan exchanging and methane wind electric locking device |
| 01/25/2005 | US6846132 Mine stopping and braces therefor |
| 12/30/2004 | US20040266329 Mine door system including an air pressure relief door |
| 12/08/2004 | CN2661925Y Multichip wind screen for draw shaft of mine |
| 12/01/2004 | CN2660129Y Autothrottle |
| 11/10/2004 | CN2654860Y Combined air duct for mine |
| 08/26/2004 | DE10232931B4 Verfahren und Vorrichtung zur Bestimmung von Strömungsverhältnissen in einem 3-dimensionalen Netzwerksystem Method and apparatus for determining flow ratios in a three-dimensional network system |
| 07/22/2004 | DE10300387A1 Method for coal seam working with additional one ended short coal faces to cut otherwise unused coal from the outer edges of the main face |
| 06/22/2004 | US6752563 Covered highway structure with means for easy and quick access to tunnel interior |
| 05/06/2004 | DE10224235B4 Wirbelhaubenabsaugvorrichtung zur Absaugung von Rauchgasen und zur Anordnung in einem langgestreckten Bauwerk Wirbelhaubenabsaugvorrichtung for extraction of fumes and for placement in an elongated structure |