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US 4,907,617 AGranted
Safety valve for a compression gas cylinder
OwnerPaul S. Whaleninventor
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OwnerPaul S. Whaleninventor
Estimating the term…
A safety valve device for a compression gas cylinder to shut off gas flow at the tank port of the cylinder when downstream gas flow control apparatus is structurally distrupted is set forth which includes a housing having a conduit therethrough for the passage of gas where the housing is adapted for fitting into the tank port of the cylinder. A poppet seat is located in the conduit and is in a fixed position relative to the tank port. A poppet which passes through the poppet seat is adapted to close the conduit when the poppet bears against the poppet seat. A helical spring is used to bias the poppet to bear against the poppet seat such that the conduit would be normally closed. However, a frangible set-off columnar member is compressively disposed between the poppet and the gas control apparatus such that structural disruption of the gas control apparatus will cause the frangible set-off member to break thereby closing the conduit and preventing gas flow from the compression gas cylinder.
A safety valve for a compression gas cylinder to shut-off gas flow at the tank port of the cylinder when downstream gas flow control apparatus is structurally disrupted by external forces, comprising:
In combination with a control valve adapted to be fitted to a tank port in a compression gas cylinder, said control valve being subject to damage by external forces, and having a gas inlet, a gas outlet, a valve seat between said gas inlet and gas outlet, an adjustable seal means to control gas flow from said gas inlet to said gas outlet, a safety valve fitted in said tank port upstream of said gas inlet comprising, a housing having a conduit therethrough for the passage of gas where said housing is adapted for fitting into said tank port, a poppet seat located in said conduit and in a fixed position relative to said tank port, a poppet passing through said poppet seat adapted to close said conduit when said poppet bears against said poppet seat, bias means for biasing said poppet to bear against said poppet seat whereby said conduit is normally closed, frangible set-off means responsive to bending and shear stress transmitted to said frangible set-off means by said control valve compressively disposed between said poppet and said control valve for holding said poppet off of said poppet seat such that upon sufficient external force acting upon said control valve, said frangible set-off means will break before said control valve thereby closing said conduit and preventing further gas flow.
A safety valve for a compression gas cylinder to shut-off gas flow when a tank valve mounted at the tank port of the gas cylinder is structurally disrupted by external forces, comprising:
Dependencies are inferred from the claim text.