| Patents for E21F 1 - Ventilation of mines or tunnels; Distribution of ventilating currents (2,288) |
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| 12/09/2009 | CN201358807Y Air on-line detecting device of mine ventilator |
| 12/03/2009 | WO2009145698A1 Duct means for an air flow or a gas flow and a method for manufacturing, handling and mounting said duct means |
| 12/02/2009 | CN201354645Y Automatic opening/closing locking device of coal mine ventilation door |
| 12/02/2009 | CN201354644Y Automatic opening/closing locking device of trackless tunnel coal mine ventilation door |
| 12/02/2009 | CN101592036A External spiral wind current generator |
| 12/02/2009 | CN100564805C Jetting flow blower fan suspension system anchoring piece and anchoring system applying the anchoring piece |
| 11/25/2009 | CN201351507Y Mine retractable air flow control air door |
| 11/25/2009 | CN201351506Y Bidirectional interlocking device for forward and backward air doors |
| 11/25/2009 | CN101586467A Road tunnel ventilation testing device |
| 11/22/2009 | CA2666039A1 A tube of fabric reinforced pvc |
| 11/19/2009 | DE202008008666U1 Anordnung zur aktiven Bodenbelüftung Arrangement for active soil aeration |
| 11/18/2009 | CN201347768Y Fire smoke extraction duct |
| 11/18/2009 | CN101581227A Coal mine double-layer translation self-control ventilation door device |
| 11/18/2009 | CN100560942C Integral organic glass fiber reinforced plastic wind pipe manufacture method |
| 11/18/2009 | CN100560936C Method for coal mine downhole reproduction and back production |
| 11/12/2009 | WO2009135464A1 Filter system for road tunnels or airport terminals |
| 10/28/2009 | CN101566067A Entire-underground cable tunnel safety manhole being used also as ventilation shaft |
| 10/28/2009 | CN100554642C Long-wall fully mechanized reclaiming room-type coal column mining method |
| 10/20/2009 | CA2418176C Mine stopping and braces therefor |
| 10/07/2009 | CN201321868Y Outdoor pull rod component for bumping air door |
| 10/07/2009 | CN201321867Y Swallowing-connecting type air duct |
| 10/07/2009 | CN201321783Y Interlocking device for air doors |
| 10/07/2009 | CN101550840A Natural dispersion air-discharge apparatus for road tunnel |
| 10/07/2009 | CN101550839A Mechanical dispersion air-discharge apparatus for road tunnel |
| 10/07/2009 | CN101550838A Centralized waste gas discharging method used in longitudinally ventilated road tunnel |
| 10/07/2009 | CN101550837A Mechanical dispersion air-discharge method for road tunnel |
| 10/07/2009 | CN101550836A Natural dispersion air-discharge method for road tunnel |
| 09/30/2009 | CN201318189Y Variable-camber air door for mine laneway |
| 09/30/2009 | CN201318188Y Ground air-exhaust structure of urban underground road |
| 09/30/2009 | CN101545378A Device for centrally discharging waste gas by adopting a middle air shaft for road tunnel |
| 09/23/2009 | CN100543273C Piston fan pressure releasing method for subway |
| 09/16/2009 | CN101532390A Copper wire mesh door for isolating and preventing explosion in roadway |
| 09/16/2009 | CN101532389A Control device of local fan of heading face and control method thereof |
| 09/02/2009 | CN201301724Y Comprehensive safety safeguard air door system |
| 09/02/2009 | CN201301723Y Fully-mechanized mining working plane ventilating structure |
| 08/27/2009 | WO2009103308A1 Method for controlling longwall mining operations, taking into account air and air conditioning resources |
| 08/26/2009 | CN201297180Y Building block system combined throttle in coal mine underworkings |
| 08/26/2009 | CN101514638A Control system for protecting coal-mine gas from explosion |
| 08/26/2009 | CN101514636A Internal spiral air flow generator |
| 08/19/2009 | CN201292859Y Mine ventilation air oxidation apparatus |
| 08/19/2009 | CN201292857Y Emergency wind inversing apparatus for coal mine aid |
| 08/19/2009 | CN101509392A Highway tunnel exhaust port opening method |
| 08/19/2009 | CN101509391A Highway tunnel exhaust port setup structure |
| 08/19/2009 | CN101509390A Tunnel ventilation control method based on fuzzy control |
| 08/19/2009 | CN101509389A Highway tunnel flat guide pressing ventilative horizontal passage control method |
| 08/12/2009 | CN201288584Y Uni-direction ventilation reverse preventing automatic window ventilator |
| 08/12/2009 | CN201288583Y Standard wind door applied on down-hole alley |
| 08/12/2009 | CN201288582Y Forcing PVC pipe heat radiator for mine construction |
| 08/12/2009 | CN201288449Y Auto-insert electromagnetic lock for colliery air door automated management |
| 08/05/2009 | CN201284658Y Optoelectronic inducing automatic door |
| 08/05/2009 | CN101498316A Mine fan rotor conveniently regulating blade |
| 08/05/2009 | CN101498312A Double impeller ventilating apparatus with rubber pipe wind pipe |
| 08/05/2009 | CN101498225A U+I type ventilating system for top-coal caving face |
| 07/29/2009 | CN201280945Y Anti-upwind baffle |
| 07/29/2009 | CN201280944Y Automatic control device for mining air door |
| 07/22/2009 | CN201277055Y Coal mine down-hole tunnel pneumatic throttle |
| 07/22/2009 | CN201277054Y Throttle pressure regulating window |
| 07/22/2009 | CN201277053Y Intelligent local ventilation system |
| 07/08/2009 | CN101476474A High-speed thermal circulation air curtain apparatus for tunnel portals |
| 07/08/2009 | CN101476473A Fireproof and explosion-proof throttle |
| 07/01/2009 | CN201265428Y Security wind deflector |
| 07/01/2009 | CN201265427Y Down-hole non-door frame forward and reverse throttle locking device |
| 07/01/2009 | CN201265426Y Excess water discharging device for mine wind pipe |
| 07/01/2009 | CN100507213C Quick closing wall |
| 06/24/2009 | CN201262095Y Natural ventilation equipment for underground mine |
| 06/24/2009 | CN201262094Y Pneumatic wind door interlocking apparatus for coal mine down-hole air duct |
| 06/24/2009 | CN101463731A High-speed thermal circulation air curtain construction method for tunnel portal |
| 06/17/2009 | CN201258752Y Wind pipe air quantity controlling switch |
| 06/17/2009 | CN101457653A Security control system with burst reduction and fireproofing function |
| 06/10/2009 | CN201255002Y Protection arrangement for starting and stopping air door winch |
| 06/10/2009 | CN201255001Y Pressure relief air door structure |
| 06/03/2009 | CN201250663Y Underground automatic door of a mine |
| 06/03/2009 | CN201250662Y Air damper locking device |
| 06/03/2009 | CN201250661Y Novel ventilation door for a coal mine lane |
| 06/03/2009 | CN100494633C Device for keeping plateau tunnel thermal stability |
| 06/03/2009 | CN100494627C Coal-mining method of high-dipping thick seam |
| 05/27/2009 | CN201246178Y Mine deep well wind lack filtering device |
| 05/26/2009 | CA2570061C Mine door power drive system |
| 05/20/2009 | CN201241723Y Air door blocking device |
| 05/20/2009 | CN201241722Y Simple air door anti-collision machine |
| 05/20/2009 | CN201241721Y Shock-proof air door |
| 05/20/2009 | CN201241720Y Tunnel ventilation communicating system |
| 05/20/2009 | CN101435337A Steel wire rope closed gravity force energy storage close type wind power balance air door |
| 05/14/2009 | WO2009000531A3 Method for eliminating smoke from and ventilating an underground train station |
| 05/13/2009 | CN101429870A Fan setting method for road tunnel multi-silo system |
| 05/07/2009 | WO2009057852A1 High-speed railway tunnel hood for reducing micro-pressure waves |
| 05/06/2009 | CN201232568Y Adjustable split ventilation machine |
| 04/30/2009 | WO2009010864A3 Underground mine ventilation curtain or barrier |
| 04/29/2009 | CN201228644Y Exhaustion, heat radiation and silencing device for deep well ore |
| 04/29/2009 | CN201228556Y Combination partition wall structure for bulkhead joint water column in mine |
| 04/29/2009 | CN101419444A Intelligent control switch for local ventilation system |
| 04/29/2009 | CN101418702A Coal mine ventilation air methane oxidation device, mash gas adding system and security protection mechanism |
| 04/29/2009 | CN101418699A Underground mine natural ventilation equipment |
| 04/29/2009 | CN101418698A Mine tunnel arc changing air door |
| 04/29/2009 | CN101418697A Well and tunnel explosion suppression and explosion stopping copper screen door installation and use method |
| 04/29/2009 | CN101418696A Fireproof and explosion-proof air door installation and use method |
| 04/29/2009 | CN101418695A Intelligent local ventilation system |
| 04/29/2009 | CN101418687A Sealing and coal mining method |
| 04/22/2009 | CN101413400A Tunneling operation simple emergent life-saving connection device and mounting method thereof |
| 04/22/2009 | CN101413398A Heating start-up system of mine ventilation air methane oxidized apparatus |