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US 5,082,246 AGranted
Gas ball valve
AssigneeMueller Co.
InventorsM. Dale Stanley, Robert D. Brownlow, John R. Rice, Robert E. Sands
Life of this patent
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AssigneeMueller Co.
InventorsM. Dale Stanley, Robert D. Brownlow, John R. Rice, Robert E. Sands
Estimating the term…
The present invention provides a valve assembly having a bore fitted with an operating member, whereby the operating member operatively controls a valve member to permit or prevent fluid flow through the valve assembly. The bore extends along a longitudinal axis and has a selected diameter in one portion and a diameter greater than the selected diameter on an interior portion. The bore further includes an annular transition portion extending with diminishing diameter from the interior portion to the one portion of the bore. The operating member is substantially cylindrical and includes a first portion which closely interfits with the one portion of the bore and a second portion which has an annular convex surface disposed to face the transition portion of the bore. The annular convex surface of the operating member and the transition portion of the bore form a metal-to-metal seat which performs desirably in a high temperature environment. The valve member is disposed in a valve housing between two rubber sealing rings. The rubber rings are disposed in recesses partially defined by annular lips. When the valve assembly is exposed to high temperature, the rubber rings burn and char away sufficiently and the valve member engages one of the annular lips to form a metal-to-metal seat to limit any leakage.
A valve assembly for carrying a fluid under pressure and comprising a valve housing having a fluid passage therethrough, a valve member rotatably disposed in said passage to be movable between an open position wherein flow through said passage and valve member is permitted and a closed position wherein flow through said passage and valve member is prevented, said valve housing having a bore of a selected diameter and extending along a longitudinal axis, an operating member disposed in said bore with one end thereof operatively engaging said valve member and an opposite end, said bore having an interior portion having a diameter greater than said selected diameter and an annular transition portion extending from said interior portion to said bore of selected diameter with diminishing diameter, said operating member being substantially cylindrical and having a selected length including a first portion having a diameter permitting said first portion to closely interfit with said bore of selected diameter and a second portion comprising an annular convex surface disposed to face said transition portion, said operating member including resilient sealing means for sealingly engaging said bore, said resilient sealing means being located between said opposite end and said second portion of said operating member.
A valve assembly for carrying a fluid under pressure and comprising a valve housing having a fluid passage therethrough, a valve member rotatably disposed in said passage to be movable between an open position wherein flow through said passage and valve member is permitted and a closed position wherein flow through said passage and valve member is prevented, said valve housing having a bore of a selected diameter and extending along a longitudinal axis, an operating member disposed in said bore with one end thereof operatively engaging said valve member and an opposite end, said bore having an interior portion having a diameter greater than said selected diameter and an annular transition portion extending from said interior portion to said bore of selected diameter with diminishing diameter, said operating member being substantially cylindrical and having a selected length including a first portion having a diameter permitting said first portion to closely interfit with said bore of selected diameter and a second portion comprising an annular convex surface disposed to face said transition portion, said operating member including resilient sealing means for sealingly engaging said bore, said resilient sealing means being located between said opposite end and said second portion of said operating member, said valve housing extending along a longitudinal axis, said passage also extending substantially parallel to said longitudinal axis of said valve housing and being defined by an interior surface of said valve housing, said interior surface including a pair of spaced apart recesses, each said recess being defined on one side by an annular lip, one of said recesses being located on one side of said valve member and the other located on the opposite side of said valve member, a pair of compressible rubber rings with one each disposed in a said recess to sealingly engage the surface of said valve member on substantially opposite sides thereof.
A valve assembly for carrying a fluid under pressure and comprising a valve housing having a fluid passage therethrough, a valve member rotatably disposed in said passage to be movable between an open position wherein flow through said passage and valve member is permitted and a closed position wherein flow through said passage and valve member is prevented, said valve housing having a bore of a selected diameter and extending along a longitudinal axis, an operating member disposed in said bore with one end thereof operatively engaging said valve member and an opposite end, said bore having an interior portion having a diameter greater than said selected diameter and an annular transition portion extending from said interior portion to said bore of selected diameter with diminishing diameter, said operating member being substantially cylindrical and having a selected length including a first portion having a diameter permitting said first portion to closely interfit with said bore of selected diameter and a second portion comprising an annular convex surface disposed to face said transition portion, said operating member including resilient sealing means for sealingly engaging said bore, said resilient sealing means being located between said opposite end and said second portion of said operating member, said valve housing extending along a longitudinal axis, said passage also extending substantially parallel to said longitudinal axis of said valve housing and being at least partially defined by an interior surface of said valve housing, said valve housing having open opposite ends, said valve assembly including an insert fitting having a through bore and one end inserted in one of said opposite ends, said one end of said fitting provided with an annular recess defined on one side by an annular lip, said interior surface including an annular recess defined on one side by an annular lip and extending about said longitudinal axis of said valve housing, each said recess having a compressible rubber ring carried therein to sealingly engage the surface of said valve member on substantially opposite sides thereof.
Dependencies are inferred from the claim text.