초록 ▼

An improved relief valve assembly includes a metallic housing which is connected with a wall of a container of pressurized liquid. A plastic liner is disposed within the housing cavity and has external thread convolutions which engage internal housing thread convolutions. An outer seal is provided t

An improved relief valve assembly includes a metallic housing which is connected with a wall of a container of pressurized liquid. A plastic liner is disposed within the housing cavity and has external thread convolutions which engage internal housing thread convolutions. An outer seal is provided to prevent exposure of the threads to foreign particles in the atmosphere surrounding the container and an inner seal is provided to prevent leakage of liquid between the liner and housing. A valve member within the plastic liner is movable against the influence of a biasing spring from a closed position to an open position under the influence of excessive fluid pressure in the container. To enable the liner and movable valve member to be preassembled and then screwed into the housing cavity, the valve spring and valve member are held in the liner cavity by a base member. The base member is held against movement relative to the liner by a plurality of resiliently deflectable fingers which extend from one end of the liner. In one embodiment of the invention, the relief valve assembly is advantageously cleaned by connecting a socket assembly to the housing of the relief valve assembly and then flowing cleansing fluid from a source of cleansing fluid through the relief valve assembly.

대표청구항 ▼

A relief valve assembly for use in association with a container of pressurized liquid, said relief valve assembly comprising a housing connected with the container and having an outer end portion which is at least partially exposed to the atmosphere around the container and an inner end portion whic

A relief valve assembly for use in association with a container of pressurized liquid, said relief valve assembly comprising a housing connected with the container and having an outer end portion which is at least partially exposed to the atmosphere around the container and an inner end portion which is at least partially exposed to the liquid in the container, said housing including surface means defining an axially extending housing cavity and internal threads within said housing cavity, a liner disposed within said housing cavity and having external threads disposed in engagement with said internal threads, said liner including surface means defining an axially extending liner cavity having an inner opening exposed to the liquid in the container, an outer opening exposed to the atmosphere surrounding the container, aNd a valve seat disposed between said inner and outer liner cavity openings, a valve member disposed within said liner cavity and movable between a closed position blocking fluid flow through said valve seat and an open position enabling fluid to flow from said inner liner cavity opening through said valve seat to said outer liner cavity opening, spring means for urging said valve member toward the closed position, said valve member being movable from the closed position toward the open position against the influence of said spring means by the fluid pressure in the container when the fluid pressure in the container exceeds a predetermined pressure to thereby exhaust at least a portion of the fluid pressure in the container to the atmosphere surrounding the container, said liner including first and second circular seals disposed in sealing engagement with axially spaced apart portions of said housing, said internal and external threads being disposed between said first and second circular seals to prevent exposure of said internal and external threads to foreign particles.