Valve assembly having novel flow characteristics

Details Valve assembly having novel flow characteristics Valve assembly having novel flow characteristics

2006-04-25

2006-04-25

Bastianelli, John (Department: 3751)

Valves and valve actuation

Pivoted valves

Gate

C251S364000, C277S460000, C277S465000

Reexamination Certificate

active

07032882

ABSTRACT:
A valve assembly including a housing having a flow channel and an annular surface surrounding the flow channel, a slide plate movable to a closed position, and a seal ring positioned between the annular surface and the slide plate. The seal ring includes a first and second sides, a first surface extending between the first and the second sides and facing towards the annular surface of the housing, and a second surface axially spaced from the first surface and extending between the first and the second sides and facing towards the slide plate. The second surface includes a continuous annular sealing portion for contacting the slide plate when the seal ring is biased against the slide plate so that a fluid-tight seal can be formed between the continuous annular sealing portion and the slide plate, and at least one passageway positioned between the annular sealing portion and the second side.

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International Search Report PCT/US2004/025888.

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