Vacuum relief valve

摘要

The invention described herein is a vacuum relief valve for rail way tanks, truck tanks, or any other analogous closed containers in which a valve prevents implosions from an interior vacuum pressure. The valve contains a novel biasing assembly and spring housing with constant force springs and this assembly is operatively attached to the tank. The pressure from these springs is such that only when the interior tank vacuum becomes greater than the springs' preset value will air enter the valve and the operatively attached tank. No increasing pressure from the biasing assembly is necessary to maintain the air flow into the valve at the air flow's initial rate.

主权项

1. A valve for eliminating a vacuum within an operatively connected tank or other operatively connected container,
said valve comprising a constant force biasing assembly, a sealing disk, an interior body surface, an integral valve stem, a lower valve body flange circular opening and a valve body exterior wall surface, said constant force biasing assembly being biased at an initial preset pressure magnitude against a vacuum arising from commodity within said operatively connected tank or container, said constant force biasing assembly maintaining said valve in an open configuration after a magnitude of said vacuum arising from commodity decreases, and said constant force biasing assembly maintaining said valve in an open configuration whenever said initial preset pressure magnitude is less than said magnitude of said vacuum arising from commodity, said open configuration of said valve allowing air to enter said valve and thereafter flow through said lower valve body flange circular opening into said operatively connected tank or other said container, said constant force biasing assembly comprising a single solid polyhedron and at least two constant force biasing components, said integral valve stem comprising sections, said integral valve stem being threaded at a section that inserts within said solid polyhedron, said valve further comprising a seal, said interior body surface comprising a single conical seat, said conical seat forming a physical barrier in combination with said sealing disk and said seal whenever said valve is in a valve closed configuration, said valve comprising a single air intake opening wherein atmosphere air enters said valve during a valve open configuration or a valve closed configuration, said single air intake opening not containing or comprising said at least two constant force biasing components, said valve being located exterior to said operatively attached tank or said container, said single air opening being bounded by a single spring housing and a single valve upper body longitudinal tube, said spring housing comprising a first opposing curved protrusion lowermost leg and a second opposing curved protrusion lowermost leg, said single air intake channel bounded by said opposing curved protrusion lowermost legs.