Valves and valve actuation – With means to increase head and seat contact pressure – Spring
Patent
1989-11-13
1990-05-29
Fox, John C.
Valves and valve actuation
With means to increase head and seat contact pressure
Spring
251315, F16K 122
Patent
active
049289225
ABSTRACT:
A butterfly valve assembly for use in connection with liquid bulk containers. An annular discharge passage houses an annular valve member moveable within the discharge passage between open and closed positions. An annular groove in close proximity to the periphery of the valve member is included on a first side of the valve member. A compressible resilient, thermoplastic rubber material in the form of a sealing ring is disposed within the groove and allows an annular edge surface of the valve member to be deflected inwardly relative to the annular groove when the valve member is rotated to the closed position. A manually grippable knob and a shaft attached between the knob and the valve member allows the valve member to be manually moved between the open and closed positions.
REFERENCES:
patent: 2923523 (1960-02-01), Taylor
patent: 3214132 (1965-10-01), Coldthorpe
patent: 4717120 (1988-01-01), Fremow et al.
Fox John C.
Hoover Group Inc.
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