| Patents for A62C 4 - Flame traps allowing passage of gas but not of flame or explosion wave (753) |
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| 04/18/1990 | CN1041285A Apparatus for explosion pressure relief |
| 04/04/1990 | CN2055394U Pipeline fire blocking apparatus |
| 03/28/1990 | EP0360004A2 Device for explosion pressure relief |
| 03/20/1990 | US4909730 Flame arrester having detonation-attenuating means |
| 02/08/1990 | DE3825085C1 Device for protecting against flashbacks |
| 02/07/1990 | EP0353840A1 Flame arresting conduit section, combustor and method |
| 01/17/1990 | EP0350629A1 Reservoir for explosive goods |
| 09/27/1989 | EP0333924A2 Flametrap with extensive heat exposure resistance |
| 09/20/1989 | EP0332681A1 Improved firestop stack fitting |
| 04/18/1989 | US4821473 To reduce chimney fires and handle smoke |
| 03/29/1989 | CN2035058U Explosion-proof unit guarding againt the back fire in gas cooker |
| 02/09/1989 | WO1989001078A1 Improved firestop stack fitting |
| 01/18/1989 | CN2030880U Back fire anti-explosive safety apparatus |
| 01/18/1989 | CN2030879U Dry back fire prevention apparatus |
| 12/08/1988 | DE3716224C1 Flame trap for ignitable gases |
| 11/15/1988 | US4785158 Flame arrestor and method of manufacture |
| 09/28/1988 | EP0283690A2 Flame arrestor and method of manufacture |
| 06/21/1988 | US4751874 For an underground personnel shelter |
| 02/16/1988 | US4724858 Which prevents spread of fire through a floor of a building |
| 10/08/1987 | DE3705902A1 Well head for refuse-dump degassing |
| 07/07/1987 | US4678120 Refractory flame-gunning apparatus |
| 07/02/1987 | DE3617522C1 Device for the abrupt shut-off of pipelines, especially dust-carrying pipelines, in the event of explosions |
| 01/29/1986 | EP0169814A1 Apparatus for the production or handling of chemical compounds |
| 06/26/1985 | EP0146278A2 Refractory flame-gunning apparatus |
| 04/09/1985 | CA1185123A1 Method and apparatus for preventing combustion in furnace fuel feeding system |
| 11/27/1984 | US4484690 Flame arresting ventilated wall for an explosion-proof enclosure |
| 11/20/1984 | US4483461 Flash-back arrestor for dissolved acetylene cylinders |
| 05/30/1984 | EP0109804A1 Flame arrestor device with porous membrane |
| 04/24/1984 | US4444109 Flame arrestor device with pourous membrane |
| 05/31/1983 | US4385569 Apparatus for the prevention of fire spreading within the feeding channel leading into the fire chamber of a furnace for solid fuel |
| 02/22/1983 | US4374649 Flame arrestor |
| 11/30/1982 | US4361420 Gas flame torch system with flash arresters |
| 07/07/1982 | EP0055424A1 Flash-back arrestor for high pressure gas cylinders |
| 04/28/1982 | EP0050232A2 Method of inhibiting a fire propagation in a solid fuel feed duct from a combustion furnace, and furnace for carrying out said method |
| 12/29/1981 | US4307673 Spark arresting module |
| 02/17/1981 | US4251226 Device for preventing backfire of inflammable gases |
| 01/20/1981 | US4246002 Welding, frustoconical seat |
| 08/12/1980 | US4217316 Immersed safety device and method for protection against back-fire in explosive gas steams |
| 05/14/1980 | EP0010734A1 Equipment proofed against explosion and detonation |
| 03/11/1980 | US4192658 Pipeline flame arrestor |
| 03/11/1980 | US4192657 Return loops of narrow tubes in liquid heat transfer fluid |
| 03/11/1980 | US4192344 Automatic emergency stop apparatus against counter flow and counter fire of gas bodies |
| 12/18/1979 | US4178958 Non-return devices for welding installations |
| 06/26/1979 | CA1057187A1 Laminar flow flame arrestor |
| 04/03/1979 | US4147495 Waste gas dispersion stack |
| 06/06/1978 | US4092908 Fluidic seal |
| 02/21/1978 | US4074485 Safety wall for a storage tank |
| 10/18/1977 | US4054631 Method for agglomerating hygroscopic dust and moisture-containing coarser particles |
| 09/20/1977 | US4049569 Burning hydrocarbons with air, spray cooling hot combustion gases ion |
| 04/05/1977 | US4015954 Laminar flow flame arrestor |
| 03/22/1977 | US4013190 Flame arresting and explosion attenuating system |
| 05/11/1976 | US3955949 Exhaust systems |
| 01/20/1976 | US3933444 Flash back arrestor |