Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1981-05-15
1983-08-02
Smith, Robert I.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
251173, 251306, F16K 2500
Patent
active
043961991
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.
REFERENCES:
patent: 4113268 (1978-09-01), Simmons et al.
patent: 4266752 (1981-05-01), Johnson
patent: 4293116 (1981-10-01), Hinrichs
Boyd Marshall J.
DiDomizio, Jr. Robert A.
Hobbs Richard C.
Burton Lockwood D.
Halista Mitchell J.
Honeywell Inc.
Smith Robert I.
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