Above-ground tank auto-limiter

F - Mech Eng,Light,Heat,Weapons – 16 – K

Patent

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Details

F16K 21/18 (2006.01) B67D 7/36 (2010.01) B65D 90/26 (2006.01) F16K 31/18 (2006.01) F16K 31/32 (2006.01)

Patent

CA 2233032

24 An above-ground tank auto-limiter is provided for preventing the overflow of fluid in storage tanks. The auto-limiter includes a valve assembly insertible downward through the top of a fill pipe of the fuel storage tank. The valve assembly has a cylindrical valve housing providing a fluid flow passage directing fuel downward into the storage tank under pressure. A hollow cylindrical float is provided in the valve assembly and is coaxially mounted along the outside surface of the valve housing leading into the storage tank. The float moves vertically to slide freely along the lower portion of the valve housing with the fluctuation of the fuel level within the tank. A series of linkage assemblies communicate the cylindrical float to valve doors. The valve doors prevent any fluid flow from passing through the fluid flow passageway when the doors are in the closed position. Bleed valves disposed in the valve assembly above the valve doors function independently from the linkage assemblies and valve doors to allow a certain amount of excess fuel that is captured within the valve housing when the fluid flow passageway is closed to bleed into the storage tank when pressure in the valve assembly is released. . .

24 Cette invention concerne un limiteur de remplissage automatique de réservoir hors sol servant à prévenir les débordements. L'objet de l'invention comprend un appareil de robinetterie qui est descendu dans le tuyau de remplissage du réservoir. Cet appareil comporte un corps cylindrique ayant un passage pour l'écoulement sous pression du combustible vers le réservoir situé plus bas. Il comporte également un flotteur cylindrique creux dont l'axe longitudinal coïncide avec celui du corps de l'appareil et qui coulisse autour de celui-ci, le long de sa partie inférieure selon la variation du niveau de combustible dans le réservoir. Le flotteur est raccordé par une série de biellettes aux clapets de l'appareil qui, en position fermée, empêchent le combustible de progresser vers le réservoir. Des soupapes de purge disposées au-dessus des clapets agissent indépendamment de ceux-ci et de leurs biellettes de commande pour laisser une certaine quantité du combustible en trop retenu dans le corps de l'appareil lorsque les clapets sont fermés de s'écouler dans le réservoir lorsque la pression régnant dans l'appareil est évacuée.

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