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US 5,314,165 AGranted
Rotary valve
AssigneeBray International, Inc.
InventorsFrank J. Raymond, Jr., John R. Dernovsek
Life of this patent
Estimating the term…
Abstract
There is disclosed a butterfly valve having a disc whose stem portions on its opposite ends are closely received within openings in opposite faces of the disc and a seat in the body of the valve. A seal assembly is mounted between the faces in surrounding relation to the stem portions so as to prevent the entry of line fluid into the openings.
Claims18
A rotary valve, comprising
- a valve body having a flowway therethrough,
- a closure member having stem portions on its opposite ends closely received within openings in the valve body to permit the closure member to be rotated between positions opening and closing the flowway, and
- an assembly sealing between the closure member and valve body in surrounding relation to each of the stem portions, including
- an outer, essentially U-shaped ring of corrosion-resistant material having flexible legs extending radially inwardly from its closed end for disposal adjacent opposite faces of the body and closure member, and
- an inner ring disposed between the legs of the outer ring to yieldably urge their outer faces against said opposite faces.
2 more elements
A butterfly valve, comprising
- a body including a tubular member connectible in a flowline and a seat about the inner diameter of the tubular body to provide a flowway therethrough,
- a disc member having stem portions at its opposite ends closely received within openings in the tubular member and seat of the valve body to permit the disc to be rotated between a position opening the flowway and a position in which its periphery is engaged with the inner diameter of the seat to close the flowway, and
- an assembly sealing between the disc and the seat in surrounding relation to each of the stem portions, including
- an outer, essentially U-shaped ring of corrosion-resistant material having flexible legs extending radially inwardly from its closed end for disposal adjacent opposite faces of the inner diameter of the seat and periphery of the disc, and
- an inner ring disposed between the legs of the outer ring to yieldably urge their outer faces against said opposite faces.
2 more elements
Dependencies are inferred from the claim text.