Rotary drag valve

Fluid handling – Systems – Multi-way valve unit

Reexamination Certificate

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Details

C137S625320

Reexamination Certificate

active

06923210

ABSTRACT:
A valve assembly comprising a rotary closure element which defines an axis of rotation and is selectively movable between a fully open position and a fully closed position. Mounted to and movable with the rotary closure element is an impedance assembly. The impedance assembly defines an inflow end and an outflow end, and comprises a plurality of fluid passageways which extend from the inflow end to the outflow end. Also partially defined by the impedance assembly is a flow opening which extends from the inflow end to the outflow end. The fluid passageways and the flow opening are oriented relative to each other such that a portion of a flow through the valve assembly is directed into the fluid passageways and a portion of the flow is directed through the flow opening when the closure element is in the fully open position.

REFERENCES:
patent: 4540025 (1985-09-01), Ledeen et al.
patent: 4665946 (1987-05-01), Hulsey
patent: 5218984 (1993-06-01), Allen
patent: 5509446 (1996-04-01), Bey
patent: 5680889 (1997-10-01), Boger
patent: 5771929 (1998-06-01), Boger
patent: 5937901 (1999-08-01), Bey

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