| Patents for A62C 4 - Flame traps allowing passage of gas but not of flame or explosion wave (753) |
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| 12/30/1997 | US5702299 Method and installation for removing smoke from a monitored space |
| 11/12/1997 | CN2267060Y Fire-froof valve |
| 10/23/1997 | CA2174677A1 Fire extraction nozzle system |
| 10/14/1997 | US5676712 Flashback protection apparatus and method for suppressing deflagration in combustion-susceptible gas flows |
| 09/04/1997 | WO1997032130A1 Vapor recovery pump |
| 09/04/1997 | CA2247054A1 Vapor recovery pump |
| 08/13/1997 | CN2259191Y Oxygen fire-retarding device |
| 04/16/1997 | CN2252017Y Oxygen pipeline back-fire relief valve |
| 04/02/1997 | EP0765675A2 Method and apparatus for damping a detonation in a container or a pipework system |
| 03/12/1997 | EP0760701A1 Flame-proof device |
| 01/23/1997 | WO1997002472A1 Cut-off member with a fire-protection valve for a gas meter, and gas meter provided therewith |
| 01/07/1997 | US5591019 Vapor recovery pump |
| 10/09/1996 | EP0649327B1 Flame arrestor apparatus |
| 09/17/1996 | US5555876 Chimney safety and control system |
| 07/17/1996 | CN1032331C Fire-proof and explosion-proof valve for pipe deliverying inflammable-explosive matter |
| 06/18/1996 | CA2057275C Flash gas venting and flame arresting apparatus |
| 05/22/1996 | CN1123006A Method and installation for removing smoke from a monitored space |
| 05/02/1996 | DE4438155A1 Silo plant for handling explosive dust |
| 04/03/1996 | EP0703807A1 Method and installation for removing smoke from a monitored space |
| 04/02/1996 | US5503231 Chimney fire safety system |
| 03/07/1996 | DE4438797C1 Fitting secure against detonation for pipes |
| 02/27/1996 | US5493820 Fire preventing duct system |
| 12/26/1995 | US5477877 Overtemperature shut-off valve with sealing spring for automatically shutting off conduits |
| 12/07/1995 | WO1995032760A1 Flameproof component |
| 11/30/1995 | WO1995032024A1 Flame-proof device |
| 11/15/1995 | EP0605551B1 Fire-protection valve with shutting spring for automatically shutting off conduits |
| 10/26/1995 | DE4419171C1 Zünddurchschlagsicheres Bauteil Zünddurchschlagsicheres component |
| 09/19/1995 | US5451140 Fugitive volatile organic compound vapor collection system |
| 09/13/1995 | CN2207204Y Gas catalyzing fire resistance explosion-proof device |
| 09/12/1995 | US5449320 Collapsible duct coupling |
| 05/16/1995 | US5415233 For extinguishing a flame travelling along a pipe |
| 04/26/1995 | EP0649327A1 Flame arrestor apparatus. |
| 04/20/1995 | DE4338013C1 Flame trap for pipelines |
| 04/04/1995 | US5402603 Flapper plate detonation flame arrester |
| 01/10/1995 | CA2067612C Detonation arrestor with stacked plates |
| 12/28/1994 | CN2186088Y Copper fire apporatus |
| 11/24/1994 | WO1994026356A1 Method and installation for removing smoke from a monitored space |
| 11/09/1994 | CN2182021Y Safety gas soldering machine |
| 10/13/1994 | WO1994022536A1 Prevention of unwanted fire |
| 09/28/1994 | CN2178128Y Hydraulic backfire arrester |
| 09/06/1994 | US5344313 Fugitive volatile organic compound vapor collection system |
| 08/30/1994 | CA2032791C Detonation arrestor |
| 08/26/1994 | CA2090774A1 Trap fitting assembly for mounting in flammable floors |
| 08/09/1994 | US5336083 Detonation arrestor with cooling section and quenching section |
| 08/09/1994 | CA2100716A1 Detonation arrestor with cooling section and quenching section, and method of cooling and quenching a flame front travelling in a line carrying flammable gas |
| 07/21/1994 | DE4301294A1 Automatic locking valve for pipes |
| 07/05/1994 | US5325549 Trap fitting assembly for mounting in flammable floors |
| 05/19/1994 | DE4238510A1 Safety valve for storage tank vehicle - has valve in bore connected to inside of tank and has gas permeable fabric held between two sintered metal sections |
| 05/04/1994 | CN2163662Y Oxyhydrogen flame dry backfire arrester |
| 04/20/1994 | CN2162262Y Remover for tempering |
| 02/23/1994 | CN2156892Y Smoke discharging fire engine |
| 01/26/1994 | CN2154081Y Anti-explosive, anti-fire respirtory valve |
| 01/06/1994 | WO1994000197A1 Flame arrestor apparatus |
| 01/05/1994 | DE4221889A1 Gaseous fuel lighting-back preventer - uses jet pump to supply gas, driven by fluid which can quench flame, fluid being separated from gas before burner |
| 12/01/1993 | CN2147875Y Labyrinth sealed flame trap |
| 11/03/1993 | EP0568326A1 Detonation arrestor with cooling section and quenching section, and method of cooling and quenching a flame front travelling in a line carrying flammable gas |
| 11/03/1993 | CN1078029A Fire-proof & explosion-proof valve for pipe deliverying inflammable-explosive matter |
| 09/28/1993 | US5247998 Chimney fire extinguishing apparatus |
| 07/14/1993 | EP0550848A2 Valve for fire extinguishing substances |
| 06/30/1993 | CN1021408C Apparatus for explosion pressure relief |
| 06/02/1993 | EP0544199A1 Flame arrester |
| 05/18/1993 | US5211554 Detonation arrestor with stacked plates |
| 04/20/1993 | US5203296 Flame arrester having helical flame arresting member |
| 04/01/1993 | WO1993006397A1 Fire-protection valve with shutting spring for automatically shutting off conduits |
| 04/01/1993 | DE4131859A1 Brandschutzventil mit schliessfeder zum automatischen absperren von leitungen Fire protection valve closing spring for automatic shut off of lines |
| 03/24/1993 | CN2128685Y Household low pressure petroleum liquid gas fire retardant explosion-proof valve |
| 03/10/1993 | EP0530945A1 Flash gas venting and flame arresting apparatus |
| 03/09/1993 | US5191990 Flash gas venting and flame arresting apparatus |
| 03/09/1993 | CA1314194C Apparatus for relieving the pressure generated by an explosion |
| 03/03/1993 | EP0528918A1 A method and apparatus for suppressing the propagation of explosions during passage of particulates or powdered materials |
| 02/11/1993 | DE4126932A1 Safety device for burning explosive gases - consists of water-filled vessel which prevents blow-back from combustion chamber |
| 12/16/1992 | CN2124725U Dry back fire protection device |
| 12/15/1992 | CA1311409C Flame arrester having detonation-attenuating means |
| 12/10/1992 | DE4118481A1 Shut=off appliance for damaged pipes - from which gases, liquids or high-pressure oil-gas mixt. escapes, includes sawing through pipe and diverting fluid flow |
| 12/09/1992 | CN1066914A Bubbling technology for household low pressure petroleum liquified gas |
| 09/08/1992 | US5145360 For connecting to a flare line |
| 07/30/1992 | DE4121536C1 Flame-proof fitting for explosive pressure spaces - has non-aligned coupling apertures, and flow duct as transverse bore of large dia. |
| 07/01/1992 | CN2108558U Flame trap for liquefied gas cylinder |
| 06/23/1992 | CA1303960C Flame arresting conduit section, combustor and method |
| 05/13/1992 | CN2104040U Explosion protection fire retardant unit for gas pipe |
| 04/21/1992 | CA1299036C Flame arrestor and method of manufacture |
| 04/01/1992 | CN2100231U Flame trap in oil-gas pipes |
| 01/29/1992 | CN2094526U Explosion proof fire-fighting ventilation hood |
| 12/27/1991 | EP0332681B1 Improved firestop stack fitting |
| 12/18/1991 | CN2090709U Smoke-and fire-preventing valve |
| 11/28/1991 | WO1991017796A1 A method and apparatus for suppressing the propagation of explosions during passage of particulates or powdered materials |
| 10/30/1991 | CN2087514U Flame trap |
| 05/29/1991 | DE4026762A1 Flame stopper for heatable gas probe - has blocking plates on both interface sides of layer of glass balls or sand |
| 05/28/1991 | US5018585 Safety device to relieve explosive pressures |
| 05/02/1991 | EP0424644A1 Pressurized gas vessel having a safety device for arresting flash-backs |
| 12/04/1990 | US4975098 Low pressure drop detonation arrestor for pipelines |
| 11/28/1990 | CN2066339U Energy-saving fire-proof device for stovepipe |
| 11/28/1990 | CN2066338U Safety box for explosive |
| 11/27/1990 | US4973451 Combustable waste gas disposal |
| 11/21/1990 | CN2065930U Liquefied petroleum gas tempering-proof unit |
| 10/23/1990 | US4964882 Pneumatics |
| 10/17/1990 | EP0392368A2 Installation for combustible waste gas incineration |
| 09/25/1990 | CA1274444A1 Firestop stack fitting |
| 06/27/1990 | EP0375455A2 Flame arrester |
| 05/09/1990 | EP0367394A1 Flame trap |