| Patents for E21F 9 - Devices preventing sparking of machines or apparatus (66) |
|---|
| 02/04/2015 | CN204140093U 矿用混凝土喷射机s形管阀及其连接组件 Mine s concrete jet valve and connecting tube assembly |
| 01/07/2015 | CN204082213U 预防煤矿带电作业及瓦斯爆炸的系统 Prevention of coal mine gas explosion in live operations and systems |
| 12/10/2014 | CN204002790U 横轴式掘进机内喷雾机构 Within roadheader spray mechanism |
| 10/30/2014 | US20140318805 Coal bed gas well apparatus and method with minable non-sparking tubular and valve components |
| 02/26/2014 | CN102606259B Quick-replaceable exhausting flame arrester |
| 02/05/2014 | CN103557027A Explosion-proof current collector of electric shovel |
| 12/11/2013 | CN203335184U Rapid-disassembly-and-assembly-type exhaust flame arrester device |
| 12/04/2013 | CN203321861U Mining flameproof electric fan |
| 10/23/2013 | EP2651793A1 Conveying installation having a spark-detecting device |
| 07/24/2013 | CN203081491U Circuit closing connection structure for carbon dioxide splitting device |
| 03/06/2013 | CN202768056U Safety interlock device for ensuring water supply operation of drill bit |
| 01/24/2013 | WO2013010221A1 Spark testing apparatus |
| 12/26/2012 | CN202628235U Quick-replaceable exhaust flame arrester |
| 12/19/2012 | CN202611876U Automatic cleaning device of fire arrestor of mining anti-explosion diesel engine |
| 10/31/2012 | CN202510265U Direct synthesis injection pump of mine electrical unit |
| 07/25/2012 | CN102606259A Quick-replaceable exhausting flame arrester |
| 06/21/2012 | WO2012079824A1 Conveying installation having a spark-detecting device |
| 06/13/2012 | CN202273734U 钻井柴油机排气管灭火装置 Drilling diesel exhaust pipe fire-fighting equipment |
| 04/21/2010 | CN1558091B Downhole used electrization and leak observation circuit |
| 11/22/2009 | CA2666039A1 A tube of fabric reinforced pvc |
| 11/26/2008 | CN100438134C Intrinsically-safe battery power supply for underground mining |
| 08/27/2008 | CN201106455Y Flame proof and essence safe type signal isolater for coal mine |
| 12/12/2007 | CN200989214Y Quick opening door mechanism for underwell antiexplosive box |
| 07/11/2007 | CN2921289Y Mine gas flame-proof sealing gasket |
| 04/26/2007 | WO2007028361A3 Wlan access device for application in mines with hazardous gases |
| 03/15/2007 | WO2007028361A2 Wlan access device for application in mines with hazardous gases |
| 11/08/2006 | CN2835519Y Explosion-proof coal-rock-impacting electric drill for mine |
| 07/26/2006 | CN2799863Y Explosion suppression type high-pressure explosion-proof hard connection structure for mine |
| 09/07/2005 | CN2723684Y Mine intelligent patrol instrument with anti-explosion function |
| 09/01/2005 | DE102004008569A1 Eigensichere Batteriestromversorgung für den untertägigen Bergbau Intrinsically safe battery power supply for underground mining |
| 08/25/2005 | US20050186471 Intrinsically-safe battery power supply for underground mining |
| 08/24/2005 | CN1658409A Intrinsically-safe battery power supply for underground mining |
| 08/17/2005 | CN2718226Y Safety cutting device under inflammable and explosive environment |
| 08/10/2005 | CN2716507Y Bus type integrated protecting and monitoring device for belt conveyor |
| 01/26/2005 | CN2674104Y Electric energy recording and intelligent protection device for mine electric digging machine |
| 12/29/2004 | CN1558091A Downhole used electriferous and leak observation circuit |
| 11/24/2004 | CN2658404Y Integral protection control module of mine electric coal drill |
| 04/21/2004 | CN2613003Y Gas monitoring explosion-proof magnetic starter |
| 03/17/1999 | CN2310860Y Safety structure for trigger type switch |
| 03/05/1997 | CN2248780Y Explosion preventing switch casing for mine with regeneration explosion-insulation surface |
| 12/18/1996 | CN2242978Y Protection device of on-the-way automatic inspection for tape machine |
| 08/24/1994 | CN2175307Y Device for protection of coal drilling machine |
| 12/22/1993 | CN2150337Y Explosion-preventing fairlead device |
| 09/23/1992 | CN2116781U Explosion protection starter |
| 04/30/1992 | DE4034316A1 Fireproof sec. light with metal vapour lamp - giving good light distribution in mining applications |
| 05/31/1989 | CN2038547U Comprehensive protector for coal electric drill |
| 08/31/1988 | CN87215929U Thyristor type protection device for coal-mining electric drill |
| 05/18/1988 | CN86105787B Power source storage device for storing hydraulic of locomotive |
| 10/07/1987 | CN86210053U Self heating device for undermine workers |
| 03/10/1987 | US4649288 Pre-start warning system and machine incorporating such system |
| 02/25/1987 | CN86105787A Power source storage device for storing hydraulic energy of locomotive |
| 01/14/1987 | CN85106744A Light pressure comparison explosion-proof method and device |
| 11/05/1986 | CN86201732U Colliery acoustooptic trembler bell with explosion-proof function |
| 07/15/1986 | US4600977 Surveillance signal apparatus |
| 04/30/1986 | CN85203290U Safety grid for mine |
| 05/15/1985 | EP0141099A2 Warning device |
| 02/12/1985 | US4498391 Explosive mine breaking apparatus with arc-suppressing heat-dissipating fluid around the charge bodies |
| 07/04/1984 | EP0112408A1 Clearing plate for a shearer drum |
| 01/17/1984 | US4425671 Electrical combustion toilet |
| 02/23/1982 | US4316513 Nail driving impact hammer |
| 10/21/1981 | EP0037933A1 Explosion-proof electrical incinerator toilet |
| 03/11/1981 | EP0024507A1 Use of a composite material based on aluminium |
| 01/20/1981 | US4245726 Supply systems for mobile appliances, particularly mining machines |
| 11/13/1979 | US4174013 Mine car |
| 08/08/1979 | EP0003287A1 Current collector for exploitations endangered by firedamp, especially for mining locomotives, and its use |
| 06/13/1978 | US4094361 Permissible mine car adapter assembly |