Valves and valve actuation – With material guide or restrictor – Baffle or zigzag flow restrictor
Reexamination Certificate
2007-02-20
2007-02-20
Look, Edward K. (Department: 3751)
Valves and valve actuation
With material guide or restrictor
Baffle or zigzag flow restrictor
C251S315010, C137S625300, C137S625320
Reexamination Certificate
active
10443825
ABSTRACT:
A valve uniquely integrates ball valve and throttling valve principals, thus affording quieter stop-and-start operation. A ball held by two seat rings is rotatable ninety degrees and has a diametric bore adjustable between fully closed (0°) and fully open (90°) positions. Oppositely disposed, relative to both the ball and the valve's longitudinal axis, are two plate assemblies each describing a tortuous fluid path. Each ring has conduits communicating with an assembly's tortuous path and communicable with the bore so that, sequentially during the ball's 0° to 90° rotation: the ball seals off the conduits, no fluid passing through the valve; all fluid passing through the valve flows through the plate assemblies and conduits; some fluid passing through the valve flows through the plate assemblies and conduits, some fluid passing through the valve flowing freely; the ball seals off the conduits, all fluid passing through the valve flowing freely.
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Fristoe Jr. John K.
Kaiser Howard
Look Edward K.
The United States of America as represented by the Secretary of
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