| Patents for E21F 1 - Ventilation of mines or tunnels; Distribution of ventilating currents (2,288) |
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| 07/07/2010 | CN201521312U Underground ventilation door open pressure reducing device |
| 07/07/2010 | CN101769263A Variable-frequency speed-regulating local fan |
| 07/07/2010 | CN101769160A Y+auxiliary H-shaped ventilation system |
| 06/30/2010 | EP2201218A2 Optimized mine ventilation system |
| 06/30/2010 | CN101761352A Ventilation method for inclined well and construction workface in tunnel construction |
| 06/23/2010 | CN201513193U Structure for mounting jet rod in tunnel through adopting prestressed anchor rod |
| 06/23/2010 | CN201513192U Air returning device for mine |
| 06/23/2010 | CN101749018A Coal mining method with direct coal pillar recovery |
| 06/20/2010 | CA2737164A1 Ventilation duct collet assembly |
| 06/17/2010 | DE112006002568B4 Längenveränderliche Verbindung eines Ansaugrohrs mit einem Staubkanal Variable length connecting a suction pipe with a dust channel |
| 06/16/2010 | CN201507321U Auxiliary air door pulling device |
| 06/16/2010 | CN101743445A Fan assembly |
| 06/16/2010 | CN101743378A Mine seal with adhesive |
| 06/16/2010 | CN101737077A Device and method for mine ventilation gas emission reduction and comprehensive utilization |
| 06/16/2010 | CN101737048A Remote control monitoring coal mining method |
| 06/16/2010 | CN101737047A Method for mining coal of steeply inclined thin seam |
| 06/16/2010 | CN101338685B Elevated plain mine artificial supercharging and aeration method |
| 06/10/2010 | US20100144264 Underground mine ventilation curtain or barrier |
| 06/09/2010 | CN201502404U Online monitoring system for mine ventilation |
| 06/09/2010 | CN1580493B Two-hole one-way side-pressure ventilation smoke-discharging method for road tunnel |
| 06/09/2010 | CN101725367A Ventilation air inlet rectifier of mine ventilation gas processing device |
| 06/09/2010 | CN101721874A Exhaust gas purification system for tunnel |
| 06/02/2010 | CN201496092U Control device of monorail crane train air door |
| 06/02/2010 | CN201496091U Plastic coated fabric negative pressure air duct |
| 06/02/2010 | CN201496090U Plastic coated fabric positive pressure air duct |
| 06/02/2010 | CN101718208A Ventilating system arranged in U+H shape under coal mine |
| 05/26/2010 | CN201486594U Air pressure alarm device of transducer of forced air-cooled mine |
| 05/26/2010 | CN201486585U Novel automatic air-controlling backflow preventing and outburst preventing air door |
| 05/26/2010 | CN201486584U Electric side open wind door |
| 05/26/2010 | CN201486583U Efficient ventilation car for underground tunneling |
| 05/19/2010 | CN201474719U Coal mine underground anti-pressure air door |
| 05/19/2010 | CN201474718U Openable-door dual-effect filtering and purifying device |
| 05/12/2010 | CN201461474U Novel jet fan |
| 05/12/2010 | CN201460983U Methane throttle audible-visual annunciator |
| 05/12/2010 | CN201460965U Mine escaping system |
| 05/12/2010 | CN201460954U Collision type automatic air door |
| 05/12/2010 | CN201460953U Colliding type wind tunnel door |
| 05/12/2010 | CN201460952U Anti-reflux device |
| 05/12/2010 | CN201460951U Acousto-optic voice alarm air door for mine |
| 05/12/2010 | CN201460950U Door leaf controller |
| 05/12/2010 | CN201460949U Universal air drum |
| 05/12/2010 | CN201460948U Coal mine return air and dust absorption ventilation pipe |
| 05/12/2010 | CN101705835A Subway ventilating device energy conservation and power supply system |
| 05/05/2010 | CN201448265U Local fan blower for mine |
| 05/05/2010 | CN201448118U Ventilator for cable channels |
| 04/29/2010 | WO2010046668A1 Improved tunnel ventilation device |
| 04/29/2010 | US20100105308 Optimized Mine Ventilation System |
| 04/28/2010 | CN201443410U Rapid reset vertical ventilating shaft explosion-proof door |
| 04/28/2010 | CN101699034A Online monitoring and fault-diagnosing device of main fan for mines |
| 04/22/2010 | WO2010044817A1 Method for removing a consumable downhole tool specification |
| 04/14/2010 | CN101694933A Method for reducing temperature of cable tunnel |
| 03/31/2010 | CN201435652Y Heat dissipation device of counter-rotating axial flow fan motors used in mines |
| 03/31/2010 | CN201433783Y Detachable GFRP air cylinder |
| 03/30/2010 | US7685943 Traveling duct for carrying exhaust captured from moving diesel-powered locomotives |
| 03/24/2010 | EP2165046A2 Method for eliminating smoke from and ventilating an underground train station |
| 03/24/2010 | CN201428472Y Gas intake, exhaust and flow guide system for ventilation oxidation unit |
| 03/24/2010 | CN201428470Y Anti-impact novel air door mechanism capable of being automatically opened and closed |
| 03/24/2010 | CN100595420C Pressure regulating and distributing chamber ventilation construction method inside tunnel assist drift heading hole |
| 03/23/2010 | CA2679197A1 Wall assembly |
| 03/17/2010 | CN201425042Y Nose cone for energy-saving mine propeller fans |
| 03/17/2010 | CN201424957Y Coal bed methane-mixing intake system of ventilation air methane oxidation system |
| 03/17/2010 | CN201424951Y Mining extraction type pneumatic local ventilator |
| 03/17/2010 | CN201424950Y Mining extraction type local ventilator |
| 03/17/2010 | CN101672193A Stepless adjustment insert plate type windscreen |
| 03/10/2010 | CN201420697Y Mining building block-type axial-flow fan |
| 03/10/2010 | CN201420564Y Switch air cylinder |
| 03/03/2010 | CN201416453Y Mine ventilating system with electricity-saving function |
| 03/03/2010 | CN101660425A Air-powered hydraulic energy storage air door |
| 02/25/2010 | WO2010021005A1 Ventilation system for railway tunnels |
| 02/25/2010 | CA2735062A1 Ventilation system for railway tunnels |
| 02/24/2010 | CN201410768Y Coating cloth of plastic ventilator |
| 02/24/2010 | CN101655012A Method for ventilating double-hole tunnel network |
| 02/17/2010 | CN201407064Y Air duct with light reflection effect |
| 02/17/2010 | CN201407052Y Dual-layer shield tunnel |
| 02/17/2010 | CN101649747A Comb-type ventilation method for trackless transport laneways of underground mines |
| 02/10/2010 | CN201401191Y Air inlet and exhaust circulating system for ventilation air methane oxidation device |
| 02/10/2010 | CN201401188Y Automatic switching device of air door for mines |
| 02/10/2010 | CN101644164A Coal mine air cylinder and manufacturing method thereof |
| 02/10/2010 | CN101644163A Wind returning device for coal mines |
| 02/03/2010 | CN201396184Y Coal mine deformation-resistant air door |
| 02/03/2010 | CN201396183Y Double-impeller ventilator with rubber wind tubes |
| 02/03/2010 | CN201396182Y Composite material reflecting gun explosion resistance wind tube for mines |
| 02/03/2010 | CN201396181Y Pressed air pipeline water draining device |
| 01/28/2010 | CA2673729A1 Reinforced mine ventilation device |
| 01/27/2010 | CN100585189C Rotary disk air-distributing and jet disturbing type hydraulic fan |
| 01/20/2010 | CN201386678Y Automatic switch and frequency-variation speed control device of coal-mine local fan |
| 01/20/2010 | CN201385452Y Antistatic structure of PVC wind tube cloth surface |
| 01/20/2010 | CN101629490A Full air pressure air borrowing method for coal mine underground tunneling roadway |
| 01/13/2010 | CN201381871Y Pressure-equalizing wind door opening device in coal mine |
| 01/13/2010 | CN201381870Y Device for fully recycling return air residual heat in mine |
| 01/13/2010 | CN100580219C Underground no pillar recovery method of coal mine |
| 01/06/2010 | CN201377338Y Air door in-place detection and control device |
| 12/30/2009 | WO2009027815A3 Optimized mine ventilation system |
| 12/30/2009 | CN101614132A Accessory device (pneumatic automatic air door) of mine main fan |
| 12/30/2009 | CN100575666C Automatic switching pneumatic interlocking crashproof air door and control method thereof |
| 12/23/2009 | CN201367913Y Ventilating tube |
| 12/23/2009 | CN201367912Y Air supply device for mine |
| 12/16/2009 | CN201363165Y Remote air door and disaster relief door controller |
| 12/16/2009 | CN201363160Y Automatic draught distributor for mine local fan |
| 12/09/2009 | CN201358949Y Mine blower rotor capable of adjusting blades |