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US 4,541,454 AGranted
Pressure regulators
OwnerOded E. Sturman, Benjamin Grill +1inventors
InventorsOded E. Sturman, Benjamin Grill, Lynn Harrison
Life of this patent
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OwnerOded E. Sturman, Benjamin Grill +1inventors
InventorsOded E. Sturman, Benjamin Grill, Lynn Harrison
Estimating the term…
A pressure regulator is disclosed which includes a valve housing with a sliding piston member defining inlet and outlet chambers. A valve seat in conjunction with the piston member forms a valve controlling fluid passing from the inlet to the outlet chamber. The piston member includes a piston and piston plate, the piston plate engaging the valve seat to control fluid flow. The diameters of the chambers and the piston are selected so that the inlet pressure causes no net force on the moving piston member, and does not contribute to either the opening or closing of the valve. On the outlet side, the piston plate is sealed with respect to the valve seat at a diameter which is less than that of the piston plate, such that the outlet pressure creates a net force urging the piston plate to engage the valve seat. The resulting unbalanced output force on the member is opposed by coil spring urging the member upward to unseat the plate from the valve seat. The output pressure is thereby regulated at a point where the outlet force equals the spring force. Alternate embodiments allowing selection of the spring force are disclosed.
A pressure regulator for receiving fluid from a fluid source and delivering fluid at a regulated pressure comprising first and second housing members, each having first and second ends, said first housing member having an inlet port at said first end thereof, said second housing member having an outlet port at said first end thereof and a valve seat having a valve seat opening therethrough adjacent said second end and facing said first end thereof, said first and second housing members being joined adjacent said second ends thereof so that said inlet port, said outlet port and said valve seat are all coaxial, said first housing member having a spring housing integral therewith and supported internally to said first housing member of at least one support so as to allow fluid flow therebetween, said spring housing being closed adjacent the inlet port end thereof, a compression spring within said spring housing, a valve closure assembly fitting at least in part within said spring housing and extending through said valve seat opening, said valve closure assembly having a valve closure member facing said valve seat, said valve closure assembly being moveable along the axis of said valve seat between a closed position with said valve closure member displaced from said valve seat and toward said second port, said compression spring urging said valve closure assembly to said open position, a diaphragm sealingly fastened adjacent its outer periphery to said spring housing and sealingly fastened adjacent its inner periphery to said valve closure assembly, thereby sealing said spring housing and isolating said spring from fluid in said inlet and outlet ports.
Dependencies are inferred from the claim text.