| Patents for E21F 1 - Ventilation of mines or tunnels; Distribution of ventilating currents (2,288) |
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| 04/29/2004 | DE20320305U1 Smoke curtain comprises elastic hollow bodies which become inflated with compressed air in event of fire through air supply valve opened manually or through fire warning installation |
| 04/20/2004 | US6724917 Control apparatus for ventilating a tunnel |
| 04/08/2004 | US20040067730 Mine ventilation |
| 04/06/2004 | US6715961 Method of supporting mine walls and installing a mine stopping |
| 03/24/2004 | EP1399645A1 Suction device comprising a fire protection system |
| 03/17/2004 | EP1398461A1 Method and device for ventilating a tunnel |
| 03/10/2004 | EP1395736A2 Suction device for a tunnel |
| 02/18/2004 | CN2603851Y Telescopic air duct |
| 02/12/2004 | DE10232931A1 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 |
| 02/11/2004 | CN2603203Y Air dust for preventing underground explosive blasting |
| 02/04/2004 | CN2602165Y Ventilating machine operation remote monitoring apparatus |
| 01/29/2004 | WO2004009419A1 Method and device for determining flow conditions in a 3-dimensional network system |
| 01/27/2004 | US6682263 Multiple tier stopping and method of constructing stopping |
| 01/15/2004 | DE20312603U1 Arrangement for improving the atmosphere in a tunnel construction, especially an underground station, comprises a liquid-guiding covering having a feed device for a cooling fluid and a collecting device for the warmed cooling fluid |
| 12/30/2003 | US6669552 Telescopic ventline |
| 12/30/2003 | US6669551 Mine ventilation structure and deck panels therefor |
| 12/24/2003 | CN2594467Y Telescopic mining ventilating tunnel |
| 11/27/2003 | WO2003098002A1 A ventilation control device |
| 11/26/2003 | CN1458424A Fan station without brattice equipped with low pressure large flow auxiliary fan |
| 11/12/2003 | CN2585979Y Regulatable castor for mine butt-cyclone master ventilator |
| 10/22/2003 | CN2581695Y Life-saver for mine |
| 10/22/2003 | CN1450250A Step distributed downhole parellel blowing fan station |
| 08/27/2003 | CN1438405A Method for preventing coal-mine underground gas and coal-dust from explosion |
| 08/07/2003 | US20030147706 Mine stopping and braces therefor |
| 07/31/2003 | US20030143942 Multiple tier stopping and method of constructing stopping |
| 07/23/2003 | EP1329588A1 Device for introducing breathing air in a tunnel passageway |
| 07/22/2003 | US6594954 Mine door installation |
| 07/10/2003 | US20030129937 Mine ventilation structure and deck panels therefor |
| 07/10/2003 | US20030126798 Mine door installation |
| 05/15/2003 | US20030091394 Covered highway structure with means for easy and quick access to tunnel interior |
| 05/01/2003 | WO2002101198A3 Suction device for a tunnel |
| 05/01/2003 | US20030082010 Mine stopping |
| 04/23/2003 | CN1412416A Working face J-type ventilating system |
| 01/22/2003 | CN2532241Y Anti-electrostatic fire-resistant high-strength polymer positive pressure air-duct |
| 01/15/2003 | CN2531109Y Ventilating structure for road tunnel |
| 12/27/2002 | WO2002103163A1 Suctioning device for a tunnel |
| 12/19/2002 | WO2002101198A2 Suction device for a tunnel |
| 12/19/2002 | WO2002101197A1 Suction device comprising a fire protection system |
| 11/27/2002 | CN1095041C Hydraulic double-rotary pulsation type ventilator for local parts of mining |
| 11/12/2002 | US6478672 Method and device for extracting fumes and heat and for providing operational for traffic structures and enclosed traffic spaces |
| 10/01/2002 | US6457906 Mine stopping |
| 07/30/2002 | US6425820 Mine door power drive system |
| 07/25/2002 | US20020098046 Method of supporting mine walls and installing a mine stopping |
| 07/23/2002 | US6422790 Foam blocks for construction of mine tunnel stoppings |
| 07/03/2002 | CN2498334Y Boosting air exhaust tube system for tunnel |
| 06/11/2002 | US6402611 Hinged mine stopping |
| 05/22/2002 | CN2492681Y Automatic alarm for mine ventilation |
| 05/03/2002 | CA2325177A1 Cable line stopping |
| 04/30/2002 | US6379084 Mine stopping |
| 04/02/2002 | US6364418 Cutting heads for horizontal remote mining system |
| 03/27/2002 | EP1191186A1 Tunnel for road transport |
| 03/26/2002 | US6361430 Balanced ventilation doors |
| 02/21/2002 | US20020021042 Foam blocks for construction of mine tunnel stoppings |
| 01/08/2002 | US6336594 Large scale positive pressure ventilation machine |
| 01/01/2002 | US6334738 Prefabricated metal overcast having a crushable lower section |
| 12/18/2001 | CA2026631C Method for sealing mine workings |
| 12/05/2001 | EP1160020A1 Suction device |
| 12/05/2001 | CN2463540Y Electric and hydraulic wind returning device for explosion-proof door of coal miine vertical shaft |
| 10/11/2001 | WO2001075271A1 Mine door power drive system |
| 09/30/2001 | CA2303589A1 Oblong-shape ventilator for mine drift |
| 09/25/2001 | US6293628 Hydraulic scroll auger mining system and method of using the same |
| 08/16/2001 | WO2001009484A3 Device and methods for combating accidents in a tunnel |
| 08/09/2001 | DE10026601C1 Absaugvorrichtung Suction |
| 08/02/2001 | WO2001055557A1 Method for ventilating diggings |
| 07/24/2001 | US6264549 Mine ventilation |
| 07/12/2001 | US20010007814 Balanced ventilation doors |
| 07/10/2001 | US6256946 Adjustable stairway for use with an overcast in a mine |
| 07/04/2001 | EP1112759A1 Process for the ventilation of road tunnel |
| 04/05/2001 | WO2000036275A9 A ventilation for tunnels and a method for control of same |
| 03/15/2001 | DE10009734A1 Verfahren und Absauganlage zum Entlüften bzw. Rauchgasabsaugen in einem Tunnel Method and extraction system for venting or Rauchgasabsaugen in a tunnel |
| 03/07/2001 | EP1081331A1 Method and suction system for ventilation, i.e. smoke suction in tunnels |
| 02/13/2001 | US6186888 System and method for controlling ventilation in a tunnel |
| 02/08/2001 | WO2001009484A2 Device and methods for combating accidents in a tunnel |
| 12/27/2000 | CN1278042A Hydraulic, double rotary and pulsation type ventilator for local parts for mining use |
| 12/26/2000 | US6164871 Mine stopping having a swinging door |
| 10/10/2000 | US6129483 Prefabricated metal overcast having a crushable lower section |
| 09/13/2000 | CN2396544Y Flame-proof type special multifunctional vacuum electromagnetic starter for driving of mine |
| 09/05/2000 | USRE36853 Mine door system |
| 08/17/2000 | DE19905815A1 Method for winding in flexible ventilation ducts has the sprung connecting flanges compressed by clamping frames on a rotating mounting |
| 07/15/2000 | CA2259348A1 Balanced ventilation doors |
| 06/22/2000 | WO2000036275A1 A ventilation for tunnels and a method for control of same |
| 05/02/2000 | US6056638 Mine ventilation wall construction |
| 03/15/2000 | CN2368978Y Flexible guide wall-adhered duct |
| 03/07/2000 | US6032986 Door system for a mine stopping |
| 03/04/2000 | CA2276990A1 Connector |
| 02/24/2000 | DE19837695A1 Road tunnel ventilation and smoke vent fireproofly planked crossbars are made up in modules outside tunnel for later erection anchored to tunnel wall or roof |
| 02/23/2000 | CN2365398Y Double-ventilator double-power sources automatic shifting controller |
| 02/17/2000 | WO2000008305A1 Mine support and ventilation system |
| 02/09/2000 | CN2363061Y Ventilation gate closing device for coal mine |
| 02/02/2000 | CN2361835Y Special ventilating device for tunnel |
| 01/05/2000 | CN2357132Y Radial shaft mixed-flow ventilator for mine |
| 12/16/1999 | WO1999064723A1 Method and device for extracting fumes and heat and for providing operational ventilation for traffic structures and enclosed traffic spaces |
| 12/09/1999 | DE19825420A1 Verfahren und Vorrichtung zur Rauchgas- und Wärmeabsaugung sowie zur Betriebslüftung für Verkehrsbauten und Räume Method and apparatus for flue gas and Wärmeabsaugung and for operational ventilation for traffic structures and spaces |
| 12/08/1999 | CN2352675Y Ventilation equipment for tunnel |
| 11/04/1999 | WO1999056002A1 Cable line stopping |
| 10/27/1999 | CN2345694Y Mining anti-shell airduct |
| 10/20/1999 | EP0949958A1 Method and device for cleaning exhaust air by separating particles and pollutant gases |
| 09/28/1999 | US5956902 Underground mine personnel doors |
| 09/16/1999 | WO1999046479A1 Temporary ventilation system for mining or tunnelling |
| 08/17/1999 | CA2069653C Mine ventilation structure |