Rotary ball valve assembly

Details Rotary ball valve assembly Rotary ball valve assembly

2005-12-13

2005-12-13

Bastianelli, John (Department: 3751)

Valves and valve actuation

With material guide or restrictor

Baffle or zigzag flow restrictor

C137S625320, C138S043000

Reexamination Certificate

active

06974116

ABSTRACT:
A rotary ball valve assembly for a rotary ball valve comprises a rotary closure element and an impedance assembly. The closure element is rotatable about a rotational axis, and has a through-bore defining a flow inlet and a flow outlet. The impedance assembly is positioned, at least in part, within the bore of the closure element. The impedance assembly includes a plurality of flow passages therethrough. An inlet and/or outlet of two or more of the flow passages is elongate and arcuate so that, in use, as the closure element rotates, the arcuate elongate inlet and/or outlet of each flow passage which is exposed is fully or substantially fully opened.

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patent: 0 838 617 (1998-04-01), None
patent: WO 03/087643 (2003-10-01), None

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