| Patents for E21F 1 - Ventilation of mines or tunnels; Distribution of ventilating currents (2,288) |
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| 05/28/2008 | CN201065767Y Dovetail ring groove embedded plate device for mine ventilator shell |
| 05/21/2008 | CN101182781A Breathing place used for synthesis pipe canal |
| 05/14/2008 | CN201059202Y Air door locking device |
| 05/14/2008 | CN201059201Y Seamless ventilating duct constructional device |
| 05/07/2008 | CN201057321Y Novel helical ventilation pipe |
| 05/07/2008 | CN201057320Y Novel helical ventilation pipe |
| 04/30/2008 | CN201053541Y High intensity seamless PVC air tube |
| 04/30/2008 | CN201053329Y Mining blast-proof air tube |
| 04/30/2008 | CN201053328Y Joint chamber coal volume limiting and wind-plugging device |
| 04/30/2008 | CN101169041A Digging laneway aerating and dust removing system arrangement method |
| 04/17/2008 | DE10262177B4 Verfahren zur Absaugung von Gasen im Brandfall A method for extraction of gases in case of fire |
| 04/16/2008 | CN201047290Y Compression-resistant type alley way air door |
| 04/10/2008 | WO2008040855A1 Device for improving operation of fan unit in tunnel or other room with large opening |
| 04/09/2008 | CN201045302Y Main fan blower automatic transition air door |
| 03/26/2008 | CN201041048Y Ventilation, heat supply and control integrated system for tunnel |
| 03/26/2008 | CN101148991A Front-and-back opening-closing split self-controllable power air door |
| 03/05/2008 | CN201031710Y Laser induction automatically interlock damper controller |
| 02/27/2008 | CN201027703Y Automatic switchover device and fan set with the same |
| 02/27/2008 | CN201027544Y Start-stop control device and locking device for coal mine down-hole air gate |
| 02/20/2008 | CN201025069Y Wind canister release annunciator |
| 02/20/2008 | CN201025060Y Automatic switch gas interlocking collision preventive wind door |
| 02/20/2008 | CN201025059Y Under-well wind-blocking over flow device for mine coal |
| 02/20/2008 | CN201025058Y Secure ventilation pipe for under-well fire area sealing wall |
| 02/20/2008 | CN201025057Y Device for mine well to recycle and utilize returned wind |
| 02/20/2008 | CN101126316A Long-wall integrated-extraction reclaiming room-type coal column mining method |
| 01/30/2008 | CN201013400Y Hanging type blast column |
| 01/23/2008 | CN100363592C Method for preventing mine lane gas from explosion and device for realizing said method |
| 01/22/2008 | CA2490639C Mine stopping |
| 01/16/2008 | CN201007218Y Full servo safety interlock air door |
| 01/16/2008 | CN201007217Y Detonator exploding prevention wind pipe for mining |
| 01/09/2008 | CN201003411Y Wind gate device |
| 12/27/2007 | DE102006036937B3 Firewall support for e.g. underground mining construction, has pillar with plate shaped base unit that is formed by ring plate, where outer diameter of ring plate is slightly larger than maximum diameter of armour arranged on ring plate |
| 12/19/2007 | CN200993025Y Mine crane wind door |
| 12/12/2007 | CN200989212Y Pneumatic linkage air door |
| 12/12/2007 | CN200989099Y Mine air door locking device |
| 12/05/2007 | CN200985802Y Vacuum duplicate supply wind electric mash gas electric closedown switch |
| 12/05/2007 | CN101082283A Gob-side entry retaining Y-type ventilation goaf top plate pressure relief gas pumping mining method |
| 11/28/2007 | CN200982480Y Quick connection glass fibre reinforced plastic tube for mine and the quick adapter |
| 11/28/2007 | CN200982202Y Anticollision device of mine down-hole wind door |
| 10/24/2007 | CN200964868Y Heavy load draw-gate structure |
| 10/24/2007 | CN200964867Y Telescopic type bending air duct |
| 10/24/2007 | CN200964737Y Pneumatic locking arrangement |
| 10/23/2007 | US7286804 Receiver digital-analog converter and tuning circuit |
| 10/17/2007 | CN101054903A Ventilation and purification method for tunnel low air shaft |
| 10/17/2007 | CN101054902A Ventilation and purification style for tunnel low air shaft |
| 10/11/2007 | WO2007114292A1 Denitrification apparatus and denirification equipment for tunnel |
| 10/10/2007 | CN101050708A Piston fan pressure releasing method for subway |
| 09/26/2007 | CN200952406Y Blocking frame ventilating and dust removing equipment |
| 09/20/2007 | US20070218825 Inflatable ventilation life curtain |
| 09/19/2007 | CN200949473Y Tunnel ventilating system with separate smoke exhauster |
| 09/12/2007 | CN200946521Y Gun -resisting fan drum for downhole working surface front |
| 09/12/2007 | CN101033689A Underground no pillar recovery method of coal mine |
| 09/11/2007 | US7267505 Mine ventilation panel system |
| 09/05/2007 | CN200943506Y Hydraulic closing device for ventilation gate for mining |
| 09/05/2007 | CN101029573A Linked composite throttle |
| 08/29/2007 | CN200940496Y Simultaneously interlock device for mine down well big and small air door |
| 08/29/2007 | CN101025085A Method for coal mine downhole reproduction and back production |
| 08/22/2007 | CN2937482Y Mine air duct connecting clip |
| 08/22/2007 | CN2937426Y Pin tooth drive safety door |
| 08/22/2007 | CN101021159A Open-end ultra-low ventilating shaft setting mode for undergound air duct |
| 08/22/2007 | CN101021158A Open-end ultra-low ventilating shaft installing method used for underground air duct |
| 08/15/2007 | CN2934579Y Coal mine underground air door device |
| 08/15/2007 | CN2934578Y Oscillating blading type automatic air door |
| 08/08/2007 | CN2931792Y Piston vent system of subway station |
| 08/08/2007 | CN101012754A Automatic switching pneumatic interlocking crashproof air door and control method thereof |
| 08/01/2007 | CN2929192Y Positive pressure flexible wind tube diverter |
| 08/01/2007 | CN2929191Y Quick water-proof joint of mine vetilation resistance test rubber pipe |
| 07/25/2007 | EP1809861A1 A tunnel cover for a tunnel for controlled ventilation of gas |
| 07/25/2007 | CN2926513Y Double-blade pressure-balanced shrinkaging throttle |
| 07/25/2007 | CN2926512Y Distributor of local vent system |
| 07/24/2007 | CA2328552C Mine stopping |
| 07/19/2007 | WO2007081216A1 Method and system for venting tunnels; mine galleries or the like |
| 07/11/2007 | CN2921288Y Large-bore modified hollow structural wall tubing |
| 07/11/2007 | CN2921221Y Mine air door locking device |
| 07/10/2007 | CA2415539C Mine ventilation structure and deck panels therefor |
| 06/27/2007 | CN2916137Y Rubber plastic air duct with light reflecting effect for mining |
| 06/20/2007 | CN2913610Y Front and rear on-off split type automatic controllable dynamic damper |
| 06/19/2007 | US7232368 Mine ventilation |
| 06/14/2007 | WO2007067056A1 Ventilation system for tunnel section or covered road |
| 06/12/2007 | CA2399278C Mine door power drive system |
| 06/06/2007 | CN2908787Y Coal mine underground air door |
| 05/30/2007 | EP1790773A2 Road enclosure |
| 05/30/2007 | CN2906068Y Movable air inlet cover for cable tunnel intake shaft mouth |
| 05/30/2007 | CN2906067Y Downhole elastic retractable supporting door frame for use in coal mine |
| 05/23/2007 | CN2903387Y Mining ventilating door |
| 05/23/2007 | CN2903386Y Fast joint |
| 05/23/2007 | CN2903385Y Ventilating duct for engineering tunnel |
| 05/22/2007 | US7219500 Compressor fuel gas conditioner |
| 05/15/2007 | CA2438277C Mine ventilation |
| 05/09/2007 | EP1783323A1 Ventilation system for covered traffic ways |
| 04/25/2007 | CN2893153Y Linking assembling airdoor |
| 04/25/2007 | CN2893152Y Large-bore hollow structural wall winding piping for ventilating/gas drowing-off |
| 04/25/2007 | CN2893151Y Mining ventilator |
| 04/18/2007 | CN2890342Y Negative pressure air duct ring |
| 04/11/2007 | CN2888075Y Ventilation gate closing device for mine |
| 04/04/2007 | CN2886088Y Pithead silencer |
| 03/28/2007 | CN2883672Y Local auto delaying switcher of fan |
| 03/21/2007 | CN2881101Y Air curtain jet air flow device for mine use |
| 03/14/2007 | CN2878677Y Air-powered security air door under coal well |
| 02/27/2007 | US7182687 Air deflecting mine ventilation structure |