초록 ▼

A high volume, fluid pressure relief valve for the top of a vent opening in a fluid storage tank. The valve includes a valve member which is reciprocal to and from a valve seat disposed in alignment with the vent opening. Constant force spring means coact with the valve member for normally retaining

A high volume, fluid pressure relief valve for the top of a vent opening in a fluid storage tank. The valve includes a valve member which is reciprocal to and from a valve seat disposed in alignment with the vent opening. Constant force spring means coact with the valve member for normally retaining the valve member in closed condition, whereby the fluid pressure force required to move the valve member remains substantially constant throughout the travel of the valve member. A large venting capacity is provided in a single compact valve device and the valve is so constructed and arranged that pilferage from the storage tank is prevented. Also the valve may include an arrangement allowing “in-breathing”of the storage tank.

대표청구항 ▼

In a fluid pressure relief valve for the vent opening in a fluid storage tank comprising, a valve member reciprocal to and from the vent opening to seal the same and when open to exhaust fluid pressure in the storage tank, means for retaining said valve member in normally closed condition, the last

In a fluid pressure relief valve for the vent opening in a fluid storage tank comprising, a valve member reciprocal to and from the vent opening to seal the same and when open to exhaust fluid pressure in the storage tank, means for retaining said valve member in normally closed condition, the last mentioned means comprising constant force spring means whereby the force required to move said valve member against the resistance of said last mentioned means remains substantially constant throughout the travel of the valve member, and including a base seat having an aperture adapted for disposal in communication with the vent opening, said valve member including sealing means adapted for sealing coaction between said member and said aperture in said base seat when said valve member is in said closed condition, said base seat having an upwardly facing exterior groove therein, said valve member including a laterally projecting cover portion which includes a downwardly projecting edge received within said groove and below the upper surface of said base seat which is adjacent said groove. In a fluid pressure relief valve for the vent opening in a fluid storage tank comprising, a valve member reciprocaL to and from the vent opening to seal the same and when open to exhaust fluid pressure in the storage tank, means for retaining said valve member in normally closed condition, the last mentioned means comprising constant force spring means whereby the force required to move said valve member against the resistance of said last mentioned means remains substantially constant throughout the travel of the valve member, and including valve means coacting with said valve member and providing for in-breathing of the valve mechanism when the latter is in mounted condition on an associated tank.