Rotary drag valve

Details Rotary drag valve Rotary drag valve

2005-03-22

2005-03-22

Fox, John (Department: 3753)

Fluid handling

Systems

Multi-way valve unit

Reexamination Certificate

active

06868865

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 of varying noise attenuating capability 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.

REFERENCES:
patent: 3880191 (1975-04-01), Baumann
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: 5758689 (1998-06-01), Leinen
patent: 5771929 (1998-06-01), Boger
patent: 5937901 (1999-08-01), Bey

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