# US 4,396,199 A · Fluid pressure sealing member for a valve > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,396,199 A - Document ID: US4396199A - Status: Granted - Kind: A - Application number: 06/263,814 - Filed: 1981-05-15 - Granted: 1983-08-02 - Earliest claimed: 1981-05-15 - Assignees: Honeywell Inc. - Inventors: Marshall J. Boyd; Robert A. DiDomizio, Jr.; Richard C. Hobbs - Web page: https://patentgrep.com/patent/US4396199A ## CPC - F16K 1/2263: {the sealing being arranged on the valve seat} - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} ## Abstract A butterfly valve having a valve body and a valve disc which is selectively rotated to produce a fluid-tight engagement of a peripheral edge of the disc with an annular seal or wall defined by a portion of an internal fluid passage in the valve body uses an annular fluid pressure seal member mounted in an annular groove in the valve body adjacent to the annular seat. The seal member is a layered structure including a pair of coaxial metallic annular seal rings having aligned J-shaped inner sides arranged in a facing relationship and a resilient annular seal ring captured between the metallic rings and having a sealing surface aligned with an outside surface of the J-shaped sides. The sealing surface of the resilient seal ring and an outside surface of the J-shaped sides are arranged to produce the fluid-tight engagement with the peripheral edge of the valve disc. ## Claims ### Claim 1 A fluid seal comprising a first annular seal ring having a J-shaped radially inward side, a second annular seal ring having a J-shaped radially inward side arranged with a curved end thereof in a facing relationship with a curved end of said J-shaped radially inward side of said first seal ring and spaced therefrom and a third annular seal ring captured between said first and second seal rings and having a radially inward seal face aligned with an outer surface of said J-shaped radially inward sides of said first and second seal rings. ### Claim 2 (depends on 1) A fluid seal as set forth in claim 1 wherein said first and second seal rings are metallic seal rings. ### Claim 3 (depends on 2) A fluid seal as set forth in claim 2 wherein said third seal ring is a resilient material seal ring. ### Claim 4 (depends on 1) A fluid seal as set forth in claim 1 wherein said first, second and third seal rings having integral extensions forming their respective radially outward sides and arranged in a layered relationship. ### Claim 5 (depends on 1) A fluid as set forth in claim 1 wherein said first and second fluid seal rings are connected together by an integral partition between their radially outward sides. ### Claim 6 (depends on 5) A fluid seal as set forth in claim 5 and further including an "O" ring between said third seal ring and said partition. ### Claim 7 (depends on 5) A fluid seal as set forth in claim 5 wherein said first and second seal rings and said partition are metallic and said third seal ring is a resilient material seal ring. ### Claim 8 (depends on 1) A fluid seal as set forth in claim 1 wherein said third seal ring includes a radially inner annular seal and a radially outward seal mount, said radially inner seal having a peripheral groove therein and said seal mount having a peripheral ridge mating with said groove. ### Claim 9 A valve comprising a hollow valve body defining a cylindrical fluid passage, an annular groove in a wall of said passage, a fluid sealing valve disc located within said fluid passage and arranged for selective rotation to produce a fluid-tight engagement of a peripheral edge of said disc with a fluid seal located in said groove an annular fluid seal positioned in said groove and including a first annular seal ring having a J-shaped radially inward side, a second annular seal ring having a J-shaped radially inward side arranged with a curved end thereof in a facing relationship with a curved end of said J-shaped radially inward side of said first seal ring and spaced therefrom and a third annular seal ring captured between said first and second seal rings and having a radially inward seal face aligned with an outer surface of said J-shaped radially inward sides of said first and second seal rings, said seal face and said outer surface of said J-shaped radially inward sides of said first and second seal rings projecting from said groove to contact said peripheral edge of said disc. ### Claim 10 (depends on 9) A valve as set forth in claim 9 wherein said first and second seal rings are metallic and said third seal ring is a resilient material seal ring. ### Claim 11 (depends on 9) A valve as set forth in claim 9 wherein said first, second and third seal rings have integral extensions forming their respective radially outward sides and arranged in a layered relationship and said valve body includes a recess communicating with said groove to capture said layered extensions therein. ### Claim 12 (depends on 9) A valve as set forth in claim 9 wherein said third seal ring includes a radially inward annular seal and a radially outward seal mount, said seal having a peripheral groove therein and said seal mount having a peripheral ridge mating with said groove. ### Claim 13 (depends on 12) A valve as set forth in claim 12 and further including an "O" ring between said ridge and an inner wall of said groove. ### Claim 14 (depends on 12) A valve as set forth in claim 12 wherein said first and second seal rings and said seal mount have integral extensions forming their respective radially outward sides and arranged in a layered relationship. ### Claim 15 (depends on 12) A valve as set forth in claim 12 wherein said first and second seal rings are metallic seal rings and said radially inward annular seal is made of a resilient material. ### Claim 16 (depends on 9) A valve as set forth in claim 9 wherein said first and second fluid seal rings are connected together by an integral partition between their radially outward sides. ### Claim 17 (depends on 16) A valve as set forth in claim 16 and further including an "O" ring between said third seal ring and said partition. ### Claim 18 (depends on 16) A valve as set forth in claim 16 wherein said first and second seal rings and said partition are metallic and said third seal ring is a resilient material seal ring. ### Claim 19 (depends on 16) A fluid seal as set forth in claim 16 and further including an "O" ring between said ridge and an inner wall of said groove. ### Claim 20 (depends on 16) A fluid seal as set forth in claim 16 wherein said first and second seal rings and said seal mount have integral extensions forming their respective radially outward sides and arranged in a layered relationship. ### Claim 21 (depends on 16) A fluid seal as set forth in claim 16 wherein said first and second seal rings are metallic seal rings and said radially inner annular seal is made of a resilient material.